Filed Pursuant to Rule 424(b)(5)
Reg. No. 333-160141

 

CALCULATION OF REGISTRATION FEE

 

$150,000,000

 

 

5% Convertible Senior Notes due 2014

 

 

 

 

Rambus Inc. is offering $150,000,000 of its 5% Convertible Senior Notes due 2014 (the “notes”). We will pay interest on the notes semi-annually, in arrears, on each June 15 and December 15, beginning on December 15, 2009, to the holders of record at the close of business on the immediately preceding June 1 and December 1, respectively. The notes mature on June 15, 2014.

 

Holders may convert their notes at their option at any time prior to March 15, 2014 only under the following circumstances: (1) during any calendar quarter beginning after the calendar quarter ending September 30, 2009, and only during such calendar quarter, if the closing sale price of our common stock for 20 or more trading days in the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter exceeds 130% of the conversion price in effect on the last trading day of the immediately preceding calendar quarter; (2) during the five business day period after any 10 consecutive trading day period in which the trading price per $1,000 principal amount of notes for each trading day of such 10 consecutive trading day period was less than 98% of the product of the closing sale price of our common stock for such trading day and the applicable conversion rate; (3) upon the occurrence of specified distributions to holders of our common stock; (4) upon a fundamental change; or (5) if we call any or all of the notes for redemption, at any time prior to the close of business on the business day immediately preceding the redemption date. On and after March 15, 2014, holders may convert their notes at any time until the close of business on the third business day prior to the maturity date, regardless of the foregoing circumstances.

 

Upon conversion of the notes, we will pay (1) cash equal to the lesser of the aggregate principal amount and the conversion value of the notes and (2) shares of our common stock for the remainder, if any, of our conversion obligation, in each case based on a daily conversion value calculated on a proportionate basis for each trading day in the 20 trading day conversion reference period.

 

We may not redeem any of the notes at our option prior to June 15, 2012. At any time on or after June 15, 2012, we will have the right, at our option, to redeem the notes in whole or in part for cash in an amount equal to 100% of the principal amount of the notes to be redeemed, together with accrued and unpaid interest, if any, if the closing sale price of our common stock for at least 20 of the 30 consecutive trading days immediately prior to any date we give a notice of redemption is greater than 130% of the conversion price on the date of such notice.

 

Upon the occurrence of a fundamental change, holders may require us to repurchase some or all of their notes for cash at a price equal to 100% of the principal amount of the notes being repurchased, plus accrued and unpaid interest, if any. In addition, upon the occurrence of certain fundamental changes, we may be required to increase the conversion rate for any notes converted in connection with such fundamental changes by a specified number of shares of our common stock.

 

The notes will be our general unsecured obligations, ranking equally in right of payment to all of our existing and future senior indebtedness and senior in right of payment to any of our future indebtedness that is expressly subordinated to the notes. Our obligations under the notes will not be guaranteed by any of our subsidiaries, will be effectively subordinated in right of payment to any of our future secured indebtedness to the extent of the collateral securing such obligations and will be structurally subordinated in right of payment to all existing and future obligations of our subsidiaries, including trade credit.

 

The notes are a new issue of securities for which there currently is no market. Our common stock is listed on the NASDAQ Global Select Market under the symbol “RMBS.” The last reported sale price of our common stock on the NASDAQ Global Select Market on June 23, 2009 was $14.85 per share.

 

The underwriters have the option to purchase, within 12 days from the date of the original issuance of the notes, up to an additional $22,500,000 aggregate principal amount of the notes solely to cover over-allotments, if any, on the terms described herein.

 

Investing in the notes involves risks. See “Risk Factors” beginning on page 21.

 

 

 

Delivery of the notes in book-entry form will be made only through The Depository Trust Company (“DTC”) on or about June 29, 2009.

 

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

 

 

The date of this prospectus is June 23, 2009.

 

TABLE OF CONTENTS

 

PROSPECTUS

 

 

 

You should rely only on the information contained or incorporated by reference in this prospectus and any related free writing prospectus that we authorize to be distributed to you. We have not, and the underwriters have not, authorized anyone to provide you with different information. If anyone provides you with different or inconsistent information, you should not rely on it. We are not, and the underwriters are not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in each of this prospectus, the documents incorporated by reference in this prospectus and any related free writing prospectus is accurate as of the respective dates of those documents. Our business, financial condition, results of operations and prospects may have changed since those dates. To the extent that information in this prospectus or any related free writing prospectus is inconsistent with the information incorporated by reference in this prospectus, the information in such document incorporated by reference is superseded by the information in such document. You should read this prospectus, the documents incorporated by reference in this prospectus and any related free writing prospectus when making your investment decision. You should also read and consider the information in the documents we have referred you to in the section of this prospectus entitled “Where You Can Find More Information.”

 

SUMMARY

Issuer		Rambus Inc.
Notes Offered		$150,000,000 million aggregate principal amount (or $172,500,000 million aggregate principal amount, if the underwriters exercise in full their option to purchase additional notes solely to cover over-allotments, if any) of 5% Convertible Senior Notes due 2014.
Maturity Date		June 15, 2014, unless earlier redeemed, repurchased or converted.
Interest Payment Dates		December 15 and June 15 of each year, beginning on December 15, 2009.
Interest		5% per annum, payable semiannually, in arrears. Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months.
Ranking		The notes will be our general unsecured obligations and will:
		• rank equal in right of payment to all of our existing and future senior indebtedness;
		• rank senior in right of payment to all of our future indebtedness that is expressly subordinated to the notes;
		• be effectively subordinated in right of payment to all of our existing and future secured obligations to the extent of the collateral securing those obligations; and
		• be structurally subordinated in right of payment to all existing and future indebtedness and other liabilities of our subsidiaries, including trade credit.
		At March 31, 2009, we had approximately $137 million aggregate principal amount of unsecured senior indebtedness outstanding (excluding the notes offered hereby, but including our zero coupon convertible senior notes due 2010 (the “existing notes”)), and our subsidiaries had approximately $1.4 million of liabilities outstanding, excluding inter-company obligations. We and our subsidiaries are not prohibited under the indenture from incurring additional other indebtedness. See “Description of the Notes — General.”
Right to Convert		Holders may convert their notes at their option at any time prior to March 15, 2014, only under the following circumstances:
		• during any calendar quarter beginning after the calendar quarter ending September 30, 2009, and only during such calendar quarter, if the closing sale price of our common stock for 20 or more trading days in the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter exceeds 130% of the conversion price in effect on the last trading day of the immediately preceding calendar quarter;

		• during the five business day period after any 10 consecutive trading day period in which the trading price per $1,000 principal amount of notes for each trading day of such 10 consecutive trading day period was less than 98% of the product of the closing sale price of our common stock for such trading day and the applicable conversion rate;
		• upon the occurrence of specified distributions to holders of our common stock;
		• upon a fundamental change; or
		• if we call any or all of the notes for redemption, at any time prior to the close of business on the business day immediately preceding the redemption date.
		On and after March 15, 2014, holders may convert their notes at any time until the close of business on the third business day prior to the maturity date, regardless of the foregoing circumstances.
		The initial conversion rate of the notes is 51.8000 per $1,000 principal amount of notes, subject to adjustment as described under “Description of the Notes — Conversion of Notes — Conversion Rate Adjustments — Adjustment Events.” The initial conversion rate is equivalent to a conversion price of approximately $19.31 per share. In addition, upon the occurrence of certain fundamental changes, we may be required to increase the conversion rate, as described under “Description of the Notes — Conversion of Notes — Adjustment to Conversion Rate upon Certain Fundamental Changes.”
		Except as described in “Description of the Notes — Conversion of Notes,” upon any conversion, holders will not receive any separate cash payment representing accrued and unpaid interest, including additional interest, if any.
Optional Redemption		We may not redeem any of the notes at our option prior to June 15, 2012. At any time on or after June 15, 2012, we will have the right, at our option, to redeem the notes in whole or in part for cash if the closing sale price of our common stock for at least 20 of the 30 consecutive trading days immediately prior to any date we give a notice of redemption is greater than 130% of the conversion price on the date of such notice. The redemption price will equal 100% of the principal amount of the notes to be redeemed, together with accrued and unpaid interest, if any, on the principal amount of the notes redeemed, to but excluding the date of redemption. However, if the redemption date falls after a record date and on or prior to the corresponding interest payment date, we will pay the full amount of accrued and unpaid interest (including additional interest, if any), if any, due on such interest payment date to the holder of record at the close of business on the corresponding record date, and not to the holder submitting the notes for redemption, if different. We will make at least six semi-annual interest payments (including the interest payments due on December 15, 2009 and June 15, 2012) in the full amount required by the indenture before we redeem the notes at our option. See “Description of the Notes — Optional Redemption.”

Fundamental Change		In the event of a fundamental change, each holder may require us to repurchase some or all of its notes for cash at a price equal to 100% of the principal amount of the notes being repurchased, plus accrued and unpaid interest, if any, in each case to, but excluding, the date of repurchase. See “Description of the Notes — Repurchase of Notes at the Option of Holders upon a Fundamental Change.”
Conversion Rate Adjustment upon Certain Fundamental Changes		If certain fundamental changes occur, we may be required to increase the conversion rate for any notes converted in connection with such fundamental changes by a specified number of shares of our common stock. A description of how the conversion rate would be increased and a table showing the conversion rate that would apply at various stock prices and fundamental change adjustment dates are set forth under “Description of the Notes — Conversion of Notes — Adjustment to Conversion Rate upon Certain Fundamental Changes.”
Sinking Fund		None.
Use of Proceeds		We estimate that the net proceeds to us from the sale of the notes will be approximately $145,000,000 (or $166,937,500 if the underwriters exercise their over-allotment option in full), after deducting underwriters’ discounts and commissions and estimated offering expenses payable by us.
		We intend to use the net proceeds from this offering for general corporate purposes, which may include financing potential acquisitions and strategic transactions, repayment of our existing notes, and working capital. See “Use of Proceeds.”
Trustee and Paying Agent		U.S. Bank National Association.
DTC Eligibility		The notes will be issued in book-entry form and will be represented by permanent global certificates deposited with, or on behalf of, The Depository Trust Company (“DTC”), and registered in the name of a nominee of DTC. Beneficial interests in the notes will be shown on, and transfers will be effected only through, records maintained by DTC or its nominee, and any such interest may not be exchanged for certificated securities, except in limited circumstances. See “Description of the Notes — Book-Entry Delivery and Form.”
Listing and Trading		The notes will not be listed on any securities exchange. Our common stock is listed on the NASDAQ Global Select Market under the symbol “RMBS.”
Governing Law		The indenture and the notes provide that they will be governed by, and construed in accordance with, the laws of the State of New York.
Risk Factors		An investment in the notes involves risks. You should carefully consider the information set forth in the sections of this prospectus entitled “Risk Factors,” as well as other information included in or incorporated by reference into this prospectus and before deciding whether to invest in the notes.

		Years Ended December 31,												Three Months Ended March 31,
		2006				2007				2008				2008				2009
														(Unaudited)
		(In thousands, except per share data)
Consolidated Statement of Operations Data(1):
Revenue:
Royalties		$	168,916			$	154,306			$	126,910			$	33,093			$	26,169
Contract revenue			26,408				25,634				15,584				6,645				1,165
Total revenue			195,324				179,940				142,494				39,738				27,334
Costs and expenses:
Cost of contract revenue			30,392				27,124				21,303				7,233				2,183
Research and development			68,977				82,877				76,222				21,502				17,837
Marketing, general and administrative			104,561				120,597				124,077				33,321				37,156
Restructuring costs			—				—				4,185				—				—
Impairment of intangible assets			—				—				2,158				—				—
Costs (recovery) of restatement and related legal activities			31,436				19,457				3,262				912				(13,639	)
Total costs and expenses			235,366				250,055				231,207				62,968				43,537
Operating loss			(40,042	)			(70,115	)			(88,713	)			(23,230	)			(16,203	)
Interest income and other income (expense), net(1)			17,495				21,759				15,199				4,595				1,440
Interest expense(2)			(10,196	)			(11,011	)			(11,805	)			(2,888	)			(2,670	)
Interest and other income (expense), net			7,299				10,748				3,394				1,707				(1,230	)
Loss before income taxes			(32,743	)			(59,367	)			(85,319	)			(21,523	)			(17,433	)
Provision for (benefit from) income taxes(1)			(14,737	)			(25,146	)			113,791				(7,169	)			(7	)
Net loss		$	(18,006	)		$	(34,221	)		$	(199,110	)		$	(14,354	)		$	(17,426	)
Net loss per share:
Basic		$	(0.17	)		$	(0.33	)		$	(1.90	)		$	(0.14	)		$	(0.17	)
Diluted		$	(0.17	)		$	(0.33	)		$	(1.90	)		$	(0.14	)		$	(0.17	)
Weighted average shares used in per share calculation:
Basic			103,048				104,056				104,574				104,683				104,376
Diluted			103,048				104,056				104,574				104,683				104,376

(1)		Reflects the implementation of Financial Accounting Standards Board Staff Position (“FSP”) APB 14-1, Accounting for Convertible Debt Instruments that May be Settled in Cash upon Conversion (Including Partial Cash Settlement), or FSP APB 14-1. See Note 1, “Basis of Presentation,” and Note 15, “Convertible Notes,” to our unaudited condensed consolidated financial statements, which appear in our Quarterly Report on Form 10-Q for the three months ended March 31, 2009 and Note 2A, “Retrospective Adoption of New Accounting Pronouncement,” to our audited consolidated financial statements which appear in our Current Report on Form 8-K filed with the Securities and Exchange Commission on June 22, 2009.
(2)		Non-cash interest expense is a result of adoption of FSP APB 14-1.

		As of March 31, 2009
		Actual				As Adjusted(2)
		(In thousands)
		(Unaudited)
Consolidated Balance Sheet Data(1):
Cash and cash equivalents		$	125,838			$	270,838
Other current assets			231,251				231,901
Total assets			395,292				543,542
Total liabilities			167,045				264,545
Stockholders’ equity			228,247				278,997

(1)		Reflects the implementation of FSP APB 14-1. See Note 1, “Basis of Presentation,” and Note 15, “Convertible Notes,” to our unaudited condensed consolidated financial statements, which appear in our Quarterly Report on Form 10-Q for the three months ended March 31, 2009 and Note 2A, “Retrospective Adoption of New Accounting Pronouncement,” to our audited consolidated financial statements which appear in our Current Report on Form 8-K filed with the Securities and Exchange Commission on June 22, 2009.
(2)		Certain of the as adjusted amounts shown are estimates that reflect the application of FSP APB 14-1, which requires issuers to separately account for the debt and equity components of convertible debt instruments that allow for cash settlement.

 

Investing in the notes and our common stock involves a high degree of risk. In addition to the other information contained in this prospectus and in documents that we incorporate by reference, you should carefully consider the risks discussed below before making a decision about investing in our securities. The risks and uncertainties discussed below are not the only ones facing us. Additional risks and uncertainties not presently known to us, or that we currently see as immaterial, may also harm our business. If any of these risks occur, our business, financial condition and operating results could be harmed, the market value of the notes and the trading price of our common stock could decline and you could lose part or all of your investment.

 

Litigation, Regulation and Business Risks Related to our Intellectual Property

 

We face current and potential adverse determinations in litigation stemming from our efforts to protect and enforce our patents and intellectual property, which could broadly impact our intellectual property rights, distract our management and cause a substantial decline in our revenue and stock price.

 

We seek to diligently protect our intellectual property rights. In connection with the extension of our licensing program to SDR SDRAM-compatible and DDR SDRAM-compatible products, we became involved in litigation related to such efforts against different parties in multiple jurisdictions. In each of these cases, we have claimed infringement of certain of our patents, while the manufacturers of such products have generally sought damages and a determination that the patents in suit are invalid, unenforceable, and not infringed. Among other things, the opposing parties have alleged that certain of our patents are unenforceable because we engaged in document spoliation, litigation misconduct and/or acted improperly during our 1991 to 1995 participation in the JEDEC standard setting organization (including allegations of antitrust violations and unfair competition). See “Summary — Litigation Updates.”

 

There can be no assurance that any or all of the opposing parties will not succeed, either at the trial or appellate level, with such claims or counterclaims against us or that they will not in some other way establish broad defenses against our patents, achieve conflicting results, or otherwise avoid or delay paying royalties for the use of our patented technology. Moreover, there is a risk that if one party prevails against us, other parties could use the adverse result to defeat or limit our claims against them; conversely, there can be no assurance that if we prevail against one party, we will succeed against other parties on similar claims, defenses, or counterclaims. In addition, there is the risk that the pending litigations and other circumstances may cause us to accept less than what we now believe to be fair consideration in settlement.

 

Any of these matters, whether or not determined in our favor or settled by us, is costly, may cause delays (including delays in negotiating licenses with other actual or potential licensees), will tend to discourage future design partners, will tend to impair adoption of our existing technologies and divert the efforts and attention of our management and technical personnel from other business operations. In addition, we may be unsuccessful in our litigation if we have difficulty obtaining the cooperation of former employees and agents who were involved in our business during the relevant periods related to our litigation and are now needed to assist in cases or testify on our behalf. Furthermore, any adverse determination or other resolution in litigation could result in our losing certain rights beyond the rights at issue in a particular case, including, among other things: our being effectively barred from suing others for violating certain or all of our intellectual property rights; our patents being held invalid or unenforceable or not infringed; our being subjected to significant liabilities; our being required to seek licenses from third parties; our being prevented from licensing our patented technology; or our being required to renegotiate with current licensees on a temporary or permanent basis. Even if we are successful in our litigation, there is no guarantee that the applicable opposing parties will be able to pay any damages awards timely or at all as a result of financial difficulties or otherwise. Delay or any or all of these adverse results could cause a substantial decline in our revenue and stock price.

An adverse resolution by or with a governmental agency, such as the European Commission or patent offices, could result in severe limitations on our ability to protect and license our intellectual property, and would cause our revenue to decline substantially.

 

From time to time, we are subject to proceedings by government agencies. These proceedings, or one by any other governmental agency, may result in adverse determinations against us or in other outcomes that could limit our ability to enforce or license our intellectual property, and could cause our revenue to decline substantially.

 

In addition, third parties have and may attempt to use adverse findings by a government agency to limit our ability to enforce or license our patents in private litigations and to assert claims for monetary damages against us. Although we have successfully defeated certain attempts to do so, there can be no assurance that other third parties will not be successful in the future or that additional claims or actions arising out of adverse findings by a government agency will not be asserted against us.

 

Further, third parties have sought and may seek review and reconsideration of the patentability of inventions claimed in certain of our patents by U.S. Patent and Trademark Office (“PTO”) and/or the European Patent Office (the “EPO”). Currently, we are subject to several re-examination proceedings, including proceedings initiated by NVIDIA, Samsung, Hynix and Micron as a defensive action in connection with our litigation against those companies. An adverse decision by the PTO or EPO could invalidate some or all of these patent claims and could also result in additional adverse consequences affecting other related U.S. or European patents, including in our intellectual property litigation. If a sufficient number of such patents are impaired, our ability to enforce or license our intellectual property would be significantly weakened and this could cause our revenue to decline substantially.

 

The pendency of any governmental agency acting as described above may impair our ability to enforce or license our patents or collect royalties from existing or potential licensees, as our litigation opponents may attempt to use such proceedings to delay or otherwise impair any pending cases and our existing or potential licensees may await the final outcome of any proceedings before agreeing to new licenses or pay royalties.

 

Litigation or other third-party claims of intellectual property infringement could require us to expend substantial resources and could prevent us from developing or licensing our technology on a cost-effective basis.

 

Our research and development programs are in highly competitive fields in which numerous third parties have issued patents and patent applications with claims closely related to the subject matter of our research and development programs. We have also been named in the past, and may in the future be named, as a defendant in lawsuits claiming that our technology infringes upon the intellectual property rights of third parties. In the event of a third-party claim or a successful infringement action against us, we may be required to pay substantial damages, to stop developing and licensing our infringing technology, to develop non-infringing technology, and to obtain licenses, which could result in our paying substantial royalties or our granting of cross licenses to our technologies. Threatened or ongoing third-party claims or infringement actions may prevent us from pursuing additional development and licensing arrangements for some period. For example, we may discontinue negotiations with certain customers for additional licensing of our patents due to the uncertainty caused by our ongoing litigation on the terms of such licenses or of the terms of such licenses on our litigation. We may not be able to obtain licenses from other parties at a reasonable cost, or at all, which could cause us to expend substantial resources, or result in delays in, or the cancellation of, new product.

 

If we are unable to successfully protect our inventions through the issuance and enforcement of patents, our operating results could be adversely affected.

 

We have an active program to protect our proprietary inventions through the filing of patents. There can be no assurance, however, that:

 

 

 

If any of the above were to occur, our operating results could be adversely affected.

 

Our inability to protect and own the intellectual property we create would cause our business to suffer.

 

We rely primarily on a combination of license, development and nondisclosure agreements, trademark, trade secret and copyright law, and contractual provisions to protect our non-patentable intellectual property rights. If we fail to protect these intellectual property rights, our licensees and others may seek to use our technology without the payment of license fees and royalties, which could weaken our competitive position, reduce our operating results and increase the likelihood of costly litigation. The growth of our business depends in large part on the use of our intellectual property in the products of third party manufacturers, and our ability to enforce intellectual property rights against them to obtain appropriate compensation. In addition, effective trade secret protection may be unavailable or limited in certain foreign countries. Although we intend to protect our rights vigorously, if we fail to do so, our business will suffer.

 

We rely upon the accuracy on our licensees’ recordkeeping, and any inaccuracies or payment disputes for amounts owed to us under our licensing agreements may harm our results of operations.

 

Many of our license agreements require our licensees to document the manufacture and sale of products that incorporate our technology and report this data to us on a quarterly basis. While licenses with such terms give us the right to audit books and records of our licensees to verify this information, audits rarely are undertaken because they can be expensive, time consuming, and potentially detrimental to our ongoing business relationship with our licensees. Therefore, we rely on the accuracy of the reports from licensees without independently verifying the information in them. Our failure to audit our licensees’ books and records may result in our receiving more or less royalty revenue than we are entitled to under the terms of our license agreements. If we conduct royalty audits in the future, such audits may trigger disagreements over contract terms with our licensees and such disagreements could hamper customer relations, divert the efforts and attention of our management from normal operations and impact our business operations and financial condition.

 

We may not be able to satisfy, and Qimonda may avoid, the requirements under the Qimonda settlement and license agreement that would require Qimonda to pay us up to an additional $100.0 million in royalty payments.

 

On March 21, 2005, we entered into a settlement and patent license agreement with Infineon (and its former parent Siemens), which was assigned to Qimonda (formerly Infineon’s DRAM operations) in October 2006 in connection with Infineon’s spin-off of Qimonda. The agreement, among other things, provides that if we enter into licenses with certain other DRAM manufacturers, Qimonda will be required to make certain additional payments to us that may aggregate up to $100.0 million. As we have not yet succeeded in entering into these additional license agreements necessary to trigger Qimonda’s obligations, Qimonda’s quarterly payment ceased as of the first quarter of 2008. The quarterly payments with Qimonda will not recommence until we enter into additional license agreements with certain other DRAM manufacturers. We may not succeed in entering into these additional license

agreements necessary to trigger Qimonda’s obligations under the settlement and patent license agreement to pay to us additional amounts, thereby reducing the value of the settlement and license agreement to us.

 

In addition, Qimonda commenced insolvency proceedings in Germany in January 2009, with the intent to restructure Qimonda and its affiliates. On June 8, 2009, Rambus received written notice from the court appointed administrator in the insolvency proceedings of Qimonda (the “Administrator”) of the Administrator’s election of Non-Performance under Section 103 of the German Insolvency Code with respect to the license agreement. According to this notice, the Administrator has determined the license agreement is no longer enforceable by either party as of April 1, 2009. Furthermore, the notice states that the Administrator has terminated the license agreement. The Administrator has indicated that he is commencing a liquidation of Qimonda’s assets. As a result of the Administrator’s actions, we may be unable to obtain any future payment from Qimonda or its successors.

 

An acquisition by Qimonda of a third party DRAM manufacturer could make it more difficult for us to obtain royalty rates we believe are appropriate and could reduce the number of companies in our antitrust litigation.

 

On or about July 8, 2008, we amended our patent license agreement with Qimonda. As discussed above, while the status and enforceability of the amended agreement is unclear due to Qimonda’s insolvency proceedings, the amended agreement grants a supplemental term license of approximately the same scope as the original term license originally provided for in the agreement, but specifies that in the event Infineon ceases to control or otherwise own a majority of Qimonda shares, certain competitors would not accede to this license upon such competitor’s acquisition of control of Qimonda. Furthermore, such acquiring competitor would not receive the benefit of a release from Rambus for past damages, including past infringement of Rambus’ patent portfolio. To the extent that Qimonda acquires another company, including such certain competitors, the acquired company would accede to the license and would be eligible to receive the benefit of the release from Rambus for past damages. Following such an acquisition by Qimonda, the combined entity would be required to pay a stepped up payment calculated in accordance with the percentage increase in the DRAM volume brought about by the acquisition. Such an increase in the payments could make it more difficult for us to obtain the royalties we believe are appropriate from the market as a whole. Such an acquisition by Qimonda of any of the certain competitors would in addition reduce the number of companies from which we may seek compensation for the antitrust injury alleged by us in our pending price-fixing action in San Francisco. Except in the case of the certain competitors, the extension of any such benefits to a third party entity, whether acquiring control or otherwise a majority of shares of Qimonda or being acquired by Qimonda, could, in addition, result in the release of claims to such third party entity, thus reducing the number of companies from which we may seek compensation for patent damages.

 

Any dispute regarding our intellectual property may require us to indemnify certain licensees, the cost of which could severely hamper our business operations and financial condition.

 

In any potential dispute involving our patents or other intellectual property, our licensees could also become the target of litigation. While we generally do not indemnify our licensees, some of our license agreements provide limited indemnities, some require us to provide technical support and information to a licensee that is involved in litigation involving use of our technology, and we may agree to indemnify others in the future. Our indemnification and support obligations could result in substantial expenses. In addition to the time and expense required for us to indemnify or supply such support to our licensees, a licensee’s development, marketing and sales of licensed semiconductors could be severely disrupted or shut down as a result of litigation, which in turn could severely hamper our business operations and financial condition.

 

Risks Associated With Our Business, Industry and Market Conditions

 

If market leaders do not adopt our innovations, our results of operations could decline.

 

An important part of our strategy is to penetrate market segments for chip interfaces by working with leaders in those market segments. This strategy is designed to encourage other participants in those segments

to follow such leaders in adopting our chip interfaces. If a high profile industry participant adopts our chip interfaces but fails to achieve success with its products or adopts and achieves success with a competing chip interface, our reputation and sales could be adversely affected. In addition, some industry participants have adopted, and others may in the future adopt, a strategy of disparaging our memory solutions adopted by their competitors or a strategy of otherwise undermining the market adoption of our solutions.

 

We target system companies to adopt our chip interface technologies, particularly those that develop and market high volume business and consumer products, which have traditionally been focused on PCs, including PC graphics processors, and video game consoles, but also are expanding to include HDTVs, cellular and digital phones, PDAs, digital cameras and other consumer electronics that incorporate all varieties of memory and chip interfaces. In particular, our strategy includes gaining acceptance of our technology in high volume consumer applications, including video game consoles, such as the Sony PlayStation^®2 and Sony PLAYSTATION^®3, HDTVs and set top boxes. We are subject to many risks beyond our control that influence whether or not a particular system company will adopt our chip interfaces, including, among others:

 

 

There can be no assurance that consumer products that currently use our technology will continue to do so, nor can there be any assurance that the consumer products that incorporate our technology will be successful in their segments thereby generating expected royalties, nor can there be any assurance that any of our technologies selected for licensing will be implemented in a commercially developed or distributed product.

 

If any of these events occur and market leaders do not successfully adopt our technologies, our strategy may not be successful and, as a result, our results of operations could decline.

 

We operate in an industry that is highly cyclical and in which the number of our potential customers may be in decline as a result of industry consolidation, and we face intense competition that may cause our results of operations to suffer.

 

The semiconductor industry is intensely competitive and has been impacted by price erosion, rapid technological change, short product life cycles, cyclical market patterns and increasing foreign and domestic competition. As the semiconductor industry is highly cyclical, significant economic downturns characterized by diminished demand, erosion of average selling prices, production overcapacity and production capacity constraints could affect the semiconductor industry. We are currently experiencing such a period of economic downturn. As a result, we may face a reduced number of licensing wins, tightening of customers’ operating budgets, difficulty or inability of our customers to pay our licensing fees, extensions of the approval process for new licenses, as discussed below, and consolidation among our customers, all of which may adversely affect the demand for our technology and may cause us to experience substantial period-to-period fluctuations in our operating results.

Many of our customers operate in industries that have experienced significant declines as a result of the current economic downturn. In particular, DRAM manufacturers, which make up a majority of our existing and potential licensees, have suffered material losses and other adverse effects to their businesses. These factors may result in industry consolidation as companies seek to reduce costs and improve profitability through business combinations. Consolidation among our existing DRAM and other customers may result in loss of revenues under existing license agreements. Consolidation among companies in the DRAM and other industries within which we license our technology may reduce the number of future licensees for our products and services. In either case, consolidation in the DRAM and other industries in which we operate may negatively impact our short-term and long-term business prospects, licensing revenues and results of operations.

 

Some semiconductor companies have developed and support competing logic chip interfaces including their own serial link chip interfaces and parallel bus chip interfaces. We also face competition from semiconductor and intellectual property companies who provide their own DDR memory chip interface technology and solutions. In addition, most DRAM manufacturers, including our XDR licensees, produce versions of DRAM such as SDR, DDRx and GDDRx SDRAM which compete with XDR chips. We believe that our principal competition for memory chip interfaces may come from our licensees and prospective licensees, some of which are evaluating and developing products based on technologies that they contend or may contend will not require a license from us. In addition, our competitors are also taking a system approach similar to ours in seeking to solve the application needs of system companies. Many of these companies are larger and may have better access to financial, technical and other resources than we possess. Wider applications of other developing memory technologies, including FLASH memory, may also pose competition to our licensed memory solutions.

 

JEDEC has standardized what it calls extensions of DDR, known as DDR2 and DDR3. Other efforts are underway to create other products including those sometimes referred to as GDDR4 and GDDR5, as well as new ways to integrate products such as system-in-package DRAM. To the extent that these alternatives might provide comparable system performance at lower or similar cost than XDR memory chips, or are perceived to require the payment of no or lower royalties, or to the extent other factors influence the industry, our licensees and prospective licensees may adopt and promote alternative technologies. Even to the extent we determine that such alternative technologies infringe our patents, there can be no assurance that we would be able to negotiate agreements that would result in royalties being paid to us without litigation, which could be costly and the results of which would be uncertain. In the industry standard and leadership serial link chip interface business, we face additional competition from semiconductor companies that sell discrete transceiver chips for use in various types of systems, from semiconductor companies that develop their own serial link chip interfaces, as well as from competitors, such as ARM and Synopsys, which license similar serial link chip interface products and digital controllers. At the 10 Gb/s speed, competition will also come from optical technology sold by system and semiconductor companies. There are standardization efforts under way or completed for serial links from standard bodies such as PCI-SIG and OIF. We may face increased competition from these types of consortia in the future that could negatively impact our serial link chip interface business.

 

In the FlexIO processor bus chip interface market segment, we face additional competition from semiconductor companies who develop their own parallel bus chip interfaces, as well as competitors who license similar parallel bus chip interface products. We may also see competition from industry consortia or standard setting bodies that could negatively impact our FlexIO processor bus chip interface business.

 

As with our memory chip interface products, to the extent that competitive alternatives to our serial or parallel logic chip interface products might provide comparable system performance at lower or similar cost, or are perceived to require the payment of no or lower royalties, or to the extent other factors influence the industry, our licensees and prospective licensees may adopt and promote alternative technologies, which could negatively impact our memory and logic chip interface business.

 

If for any of these reasons we cannot effectively compete in these primary market segments, our results of operations could suffer.

In order to grow, we may have to invest more resources in research and development than anticipated, which could increase our operating expenses and negatively impact our operating results.

 

If new competitors, technological advances by existing competitors, our entry into new markets, or other competitive factors require us to invest significantly greater resources than anticipated in our research and development efforts, our operating expenses would increase. For the three months ended March 31, 2009 and 2008, research and development expenses were $17.8 million and $21.5 million, respectively, including stock-compensation of approximately $2.7 million and $3.9 million, respectively. If we are required to invest significantly greater resources than anticipated in research and development efforts without an increase in revenue, our operating results could decline. Research and development expenses are likely to fluctuate from time to time to the extent we make periodic incremental investments in research and development, and these investments may be independent of our level of revenue. In order to grow, which may include entering new markets, we anticipate that we will continue to devote substantial resources to research and development. We expect these expenses to increase in absolute dollars in the foreseeable future due to the increased complexity and the greater number of products under development as well as selectively hiring additional employees.

 

Our revenue is concentrated in a few customers, and if we lose any of these customers, our revenue may decrease substantially.

 

We have a high degree of revenue concentration, with our top five licensees representing approximately 79% and 67% of our revenues for the three months ended March 31, 2009 and 2008, respectively. For the three months ended March 31, 2009, revenues from Fujitsu, NEC, AMD and Panasonic each accounted for 10% or more of our total revenue. For the three months ended March 31, 2008, revenues from Elpida, Fujitsu and Sony each accounted for 10% or more of our total revenue. We may continue to experience significant revenue concentration for the foreseeable future.

 

In addition, some of our commercial agreements require us to provide certain customers with the lowest royalty rate that we provide to other customers for similar technologies, volumes and schedules. These clauses may limit our ability to effectively price differently among our customers, to respond quickly to market forces, or otherwise to compete on the basis of price. The particular licensees which account for revenue concentration have varied from period to period as a result of the addition of new contracts, expiration of existing contracts, industry consolidation, the expiration of deferred revenue schedules under existing contracts, and the volumes and prices at which the licensees have recently sold licensed semiconductors to system companies. These variations are expected to continue in the foreseeable future, although we anticipate that revenue will continue to be concentrated in a limited number of licensees.

 

We are in negotiations with licensees and prospective licensees to reach patent license agreements for DRAM devices and DRAM controllers. We expect that patent license royalties will continue to vary from period to period based on our success in renewing existing license agreements and adding new licensees, as well as the level of variation in our licensees’ reported shipment volumes, sales price and mix, offset in part by the proportion of licensee payments that are fixed. A number of our material license agreements are scheduled to expire throughout 2010, including those of three licensees, each of which accounted for more than 10% of our revenue in 2008. We are currently in discussions with those licensees whose agreements are scheduled to expire in 2010. However, we cannot provide any assurance that we will reach agreement on renewal terms or that the royalty rates we will be entitled to receive under the new agreements will be as favorable to us as our current agreements. If we are unsuccessful in renewing any of these patent license agreements, our results of operations may decline significantly.

 

Weakening global economic conditions may adversely affect demand for our products and services.

 

Our operations and performance depend significantly on worldwide economic conditions, and the U.S. and world economies are undergoing a period of recession. Uncertainty about current global economic conditions poses a risk as consumers and businesses may postpone spending in response to tighter credit, negative financial news and declines in income or asset values, which could have a material negative effect on the demand for the products of our licensees in the foreseeable future. Other factors that could influence demand

include continuing increases in fuel and energy costs, competitive pressures, including pricing pressures, from companies that have competing products, changes in the credit market, conditions in the residential real estate and mortgage markets, consumer confidence, and other macroeconomic factors affecting consumer spending behavior. If our licensees experience reduced demand for their products as a result of economic conditions or otherwise, our business and results of operations could be harmed. In addition, a continuation of current conditions in credit markets could limit our ability to obtain external financing to fund our operations and capital expenditures.

 

If our commercial counterparties are unable to fulfill their financial and other obligations to us, our business and results of operations may be affected adversely.

 

The downturn in worldwide economic conditions threatens the financial health of our commercial counterparties, including companies with whom we have entered into licensing arrangements and litigation settlements that provide for ongoing payments to us, and their ability to fulfill their financial and other obligations to us. As discussed in further detail above, we are a party to a settlement and licensing agreement with Qimonda, which provides that, subject to certain conditions that have not yet been fulfilled, Qimonda may be required to make additional royalty payments to us of up to $100.0 million. In January 2009, Qimonda filed for bankruptcy, and in June 2009, we terminated their license. On June 8, 2009, Rambus received notice that the Qimonda Administrator has determined that the license agreement is no longer enforceable by either party as of April 1, 2009. In addition, Spansion, which was one of our licensees and owes us an immaterial amount, filed a voluntary petition for Chapter 11 reorganization relief in Delaware federal court in March 2009, and is now operating as debtors-in-possession under the jurisdiction of the bankruptcy court. Because bankruptcy courts have the power to modify or cancel contracts of the petitioner which remain subject to future performance and alter or discharge payment obligations related to pre-petition debts, we may receive less than all of the payments that we would otherwise be entitled to receive from Qimonda or Spansion as a result of their bankruptcy proceedings. If we are unable to collect all of such payments owed to us, or if other of our commercial counterparties enter into bankruptcy or otherwise seek to renegotiate their financial obligations to us as a result of the deterioration of their financial health, our business and results of operations may be affected adversely.

 

Our business and operating results may be harmed if we undertake any restructuring activities or if we are unable to manage growth in our business.

 

From time to time, we may undertake to restructure our business, such as the reduction in our workforce that we announced in August 2008. There are several factors that could cause a restructuring to have an adverse effect on our business, financial condition and results of operations. These include potential disruption of our operations, the development of our technology, the deliveries to our customers and other aspects of our business. Employee morale and productivity could also suffer and we may lose employees whom we want to keep. Loss of sales, service and engineering talent, in particular, could damage our business. Any restructuring would require substantial management time and attention and may divert management from other important work. Employee reductions or other restructuring activities also cause us to incur restructuring and related expenses such as severance expenses. Moreover, we could encounter delays in executing any restructuring plans, which could cause further disruption and additional unanticipated expense.

 

Our business historically has experienced periods of rapid growth that have placed, and may continue to place, significant demands on our managerial, operational and financial resources. In managing this growth, we must continue to improve and expand our management, operational and financial systems and controls. We also need to continue to expand, train and manage our employee base. We cannot assure you that we will be able to timely and effectively meet demand and maintain the quality standards required by our existing and potential customers and licensees. If we ineffectively manage our growth or we are unsuccessful in recruiting and retaining personnel, our business and operating results will be harmed.

If we cannot respond to rapid technological change in the semiconductor industry by developing new innovations in a timely and cost effective manner, our operating results will suffer.

 

The semiconductor industry is characterized by rapid technological change, with new generations of semiconductors being introduced periodically and with ongoing improvements. We derive most of our revenue from our chip interface technologies that we have patented. We expect that this dependence on our fundamental technology will continue for the foreseeable future. The introduction or market acceptance of competing chip interfaces that render our chip interfaces less desirable or obsolete would have a rapid and material adverse effect on our business, results of operations and financial condition. The announcement of new chip interfaces by us could cause licensees or system companies to delay or defer entering into arrangements for the use of our current chip interfaces, which could have a material adverse effect on our business, financial condition and results of operations. We are dependent on the semiconductor industry to develop test solutions that are adequate to test our chip interfaces and to supply such test solutions to our customers and us.

 

Our continued success depends on our ability to introduce and patent enhancements and new generations of our chip interface technologies that keep pace with other changes in the semiconductor industry and which achieve rapid market acceptance. We must continually devote significant engineering resources to addressing the ever increasing need for higher speed chip interfaces associated with increases in the speed of microprocessors and other controllers. The technical innovations that are required for us to be successful are inherently complex and require long development cycles, and there can be no assurance that our development efforts will ultimately be successful. In addition, these innovations must be:

 

 

Finally, significant technological innovations generally require a substantial investment before their commercial viability can be determined. There can be no assurance that we have accurately estimated the amount of resources required to complete the projects, or that we will have, or be able to expend, sufficient resources required for these types of projects. In addition, there is market risk associated with these products, and there can be no assurance that unit volumes, and their associated royalties, will occur. If our technology fails to capture or maintain a portion of the high volume consumer market, our business results could suffer.

 

If we cannot successfully respond to rapid technological changes in the semiconductor industry by developing new products in a timely and cost effective manner our operating results will suffer.

 

Some of our revenue is subject to the pricing policies of our licensees over whom we have no control.

 

We have no control over our licensees’ pricing of their products and there can be no assurance that licensee products using or containing our chip interfaces will be competitively priced or will sell in significant volumes. One important requirement for our memory chip interfaces is for any premium charged by our licensees in the price of memory and controller chips over alternatives to be reasonable in comparison to the perceived benefits of the chip interfaces. If the benefits of our technology do not match the price premium charged by our licensees, the resulting decline in sales of products incorporating our technology could harm our operating results.

 

Our licensing cycle is lengthy and costly and our marketing and licensing efforts may be unsuccessful.

 

The process of persuading customers to adopt and license our chip interface technologies can be lengthy and, even if successful, there can be no assurance that our chip interfaces will be used in a product that is ultimately brought to market, achieves commercial acceptance, or results in significant royalties to us. We generally incur significant marketing and sales expenses prior to entering into our license agreements, generating a license fee and establishing a royalty stream from each licensee. The length of time it takes to

establish a new licensing relationship can take many months. In addition, our ongoing intellectual property litigation and regulatory actions have and will likely continue to have an impact on our ability to enter into new licenses and renewals of licenses. As such, we may incur costs in any particular period before any associated revenue stream begins. If our marketing and sales efforts are very lengthy or unsuccessful, then we may face a material adverse effect on our business and results of operations as a result of delay or failure to obtain royalties.

 

Future revenue is difficult to predict for several reasons, and our failure to predict revenue accurately may cause us to miss analysts’ estimates and result in our stock price declining.

 

Our lengthy and costly license negotiation cycle makes our future revenue difficult to predict because we may not be successful in entering into licenses with our customers on our estimated timelines.

 

While some of our license agreements provide for fixed, quarterly royalty payments, many of our license agreements provide for volume-based royalties. The sales volume and prices of our licensees’ products in any given period can be difficult to predict. As a result, our actual results may differ substantially from analyst estimates or our forecasts in any given quarter.

 

In addition, a portion of our revenue comes from development and support services provided to our licensees. Depending upon the nature of the services, a portion of the related revenue may be recognized ratably over the support period, or may be recognized according to contract accounting. Contract revenue accounting may result in deferral of the service fees to the completion of the contract, or may be recognized over the period in which services are performed on a percentage-of-completion basis. There can be no assurance that the product development schedule for these projects will not be changed or delayed. All of these factors make it difficult to predict future licensing revenue and may result in our missing previously announced earnings guidance or analysts’ estimates which would likely cause our stock price to decline.

 

Our quarterly and annual operating results are unpredictable and fluctuate, which may cause our stock price to be volatile and decline.

 

Since many of our revenue components fluctuate and are difficult to predict, and our expenses are largely independent of revenue in any particular period, it is difficult for us to accurately forecast revenue and profitability. Factors other than those set forth above, which are beyond our ability to control or assess in advance, that could cause our operating results to fluctuate include:

 

 

 

For the three months ended March 31, 2009 and 2008, royalties accounted for 96% and 83%, respectively, of our total revenue.

 

We believe that royalties will continue to represent a majority of total revenue for the foreseeable future. Royalties are generally recognized in the quarter in which we receive a report from a licensee regarding the sale of licensed chips in the prior quarter; however, royalties are recognized only if collectability is assured. As a result of these uncertainties and effects being outside of our control, royalty revenue is difficult to predict and makes it difficult to develop accurate financial forecasts, which could cause our stock price to become volatile and decline.

 

A substantial portion of our revenue is derived from sources outside of the United States and this revenue and our business generally are subject to risks related to international operations that are often beyond our control.

 

For the three months ended March 31, 2009 and 2008, revenue from our sales to international customers constituted approximately 81% and 83% of our total revenue, respectively. We currently have international operations in India (design), Japan (business development), Taiwan (business development) and Germany (business development). As a result of our continued focus on international markets, we expect that future revenue derived from international sources will continue to represent a significant portion of our total revenue.

 

To date, all of the revenue from international licensees has been denominated in U.S. dollars. However, to the extent that such licensees’ sales to systems companies are not denominated in U.S. dollars, any royalties which are based as a percentage of the customer’s sales that we receive as a result of such sales could be subject to fluctuations in currency exchange rates. In addition, if the effective price of licensed semiconductors sold by our foreign licensees were to increase as a result of fluctuations in the exchange rate of the relevant currencies, demand for licensed semiconductors could fall, which in turn would reduce our royalties. We do not use financial instruments to hedge foreign exchange rate risk.

 

Our international operations and revenue are subject to a variety of risks which are beyond our control, including:

 

 

We and our licensees are subject to many of the risks described above with respect to companies which are located in different countries, particularly home video game console and PC manufacturers located in Asia and elsewhere. There can be no assurance that one or more of the risks associated with our international operations could not result in a material adverse effect on our business, financial condition or results of operations.

 

We may make future acquisitions or enter into mergers, strategic transactions or other arrangements that could cause our business to suffer.

 

As part of our strategic initiatives, we currently are evaluating, and expect to continue to engage in, investments in or acquisitions of companies, products or technologies, and the entry into strategic transactions or other arrangements. These acquisitions, investments, transactions or arrangements are likely to range in size, some of which may be significant. If we make an acquisition, we may experience difficulty integrating that company’s or division’s personnel and operations, which could negatively affect our operating results. In addition:

 

 

In connection with future acquisitions or mergers, strategic transactions or other arrangements, we may incur substantial expenses regardless of whether the transaction occurs. In addition, we may be required to assume the liabilities of the companies we acquire. By assuming the liabilities, we may incur liabilities such as those related to intellectual property infringement or indemnification of customers of acquired businesses for similar claims, which could materially and adversely affect our business. We may have to incur debt or issue equity securities to pay for any future acquisition, the issuance of which could involve restrictive covenants or be dilutive to our existing stockholders.

 

Unanticipated changes in our tax rates or in the tax laws and regulations could expose us to additional income tax liabilities which could affect our operating results and financial condition.

 

We are subject to income taxes in both the United States and various foreign jurisdictions. Significant judgment is required in determining our worldwide provision (benefit) for income taxes and, in the ordinary course of business, there are many transactions and calculations where the ultimate tax determination is uncertain. Our effective tax rate could be adversely affected by changes in the mix of earnings in countries with differing statutory tax rates, changes in the valuation of deferred tax assets and liabilities, changes in tax laws and regulations as well as other factors. For example, the state of California has enacted regulations which limit the use of net operating losses and certain tax credits, including research and development credits, that apply for 2008 and 2009, which could lead to an increase in our effective tax rate. Our tax determinations are regularly subject to audit by tax authorities and developments in those audits could adversely affect our income tax provision. Although we believe that our tax estimates are reasonable, the final determination of tax audits or tax disputes may be different from what is reflected in our historical income tax provisions which could affect our operating results.

 

Our results of operations could vary as a result of the methods, estimates, and judgments we use in applying our accounting policies.

 

The methods, estimates, and judgments we use in applying our accounting policies have a significant impact on our results of operations, as described elsewhere in this report. Such methods, estimates, and judgments are, by their nature, subject to substantial risks, uncertainties, and assumptions, and factors may arise over time that lead us to change our methods, estimates, and judgments.

Changes in those methods, estimates, and judgments could significantly affect our results of operations. In particular, the calculation of share-based compensation expense under Statement of Financial Accounting Standards No. 123(R) (“SFAS No. 123(R)”) requires us to use valuation methodologies and a number of assumptions, estimates, and conclusions regarding matters such as expected forfeitures, expected volatility of our share price, and the exercise behavior of our employees. Furthermore, there are no means, under applicable accounting principles, to compare and adjust our expense if and when we learn about additional information that may affect the estimates that we previously made, with the exception of changes in expected forfeitures of share-based awards. Factors may arise that lead us to change our estimates and assumptions with respect to future share-based compensation arrangements, resulting in variability in our share-based compensation expense over time. Changes in forecasted stock-based compensation expense could impact our cost of contract revenue, research and development expenses, marketing, general and administrative expenses and our effective tax rate, which could have an adverse impact on our results of operations.

 

If we are unable to attract and retain qualified personnel, our business and operations could suffer.

 

Our success is dependent upon our ability to identify, attract, compensate, motivate and retain qualified personnel, especially engineers, who can enhance our existing technologies and introduce new technologies. Competition for qualified personnel, particularly those with significant industry experience, is intense, in particular in the San Francisco Bay Area where we are headquartered and in the area of Bangalore, India where we have a design center. We are also dependent upon our senior management personnel. The loss of the services of any of our senior management personnel, or key sales personnel in critical markets, or critical members of staff, or of a significant number of our engineers could be disruptive to our development efforts or business relationships and could cause our business and operations to suffer.

 

Decreased effectiveness of equity-based compensation could adversely affect our ability to attract and retain employees.

 

We have historically used stock options and other forms of stock-based compensation as key components of our employee compensation program in order to align employees’ interests with the interests of our stockholders, encourage employee retention and provide competitive compensation and benefit packages. As a result of changes in previous accounting principles, we have incurred increased compensation costs associated with our stock-based compensation programs. In addition, if we face any difficulty relating to obtaining stockholder approval of our equity compensation plans, it could make it harder or more expensive for us to grant stock-based payments to employees in the future. As a result of these factors leading to lower equity compensation of our employees, we may find it difficult to attract, retain and motivate employees, and any such difficulty could materially adversely affect our business.

 

Our operations are subject to risks of natural disasters, acts of war, terrorism or widespread illness at our domestic and international locations, any one of which could result in a business stoppage and negatively affect our operating results.

 

Our business operations depend on our ability to maintain and protect our facility, computer systems and personnel, which are primarily located in the San Francisco Bay Area. The San Francisco Bay Area is in close proximity to known earthquake fault zones. Our facility and transportation for our employees are susceptible to damage from earthquakes and other natural disasters such as fires, floods and similar events. Should an earthquake or other catastrophes, such as fires, floods, power loss, communication failure or similar events disable our facilities, we do not have readily available alternative facilities from which we could conduct our business, which stoppage could have a negative effect on our operating results. Acts of terrorism, widespread illness and war could also have a negative effect at our international and domestic facilities.

 

Compliance with changing regulation of corporate governance and public disclosure may result in additional expenses.

 

Changing laws, regulations and standards relating to corporate governance and public disclosure, including new Securities and Exchange Commission (the “SEC”), regulations and Nasdaq rules, are creating

uncertainty for companies such as ours. These new or changed laws, regulations and standards are subject to varying interpretations in many cases due to their lack of specificity, and as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies, which could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices. We intend to invest resources to comply with evolving laws, regulations and standards, and this investment may result in increased general and administrative expenses and a diversion of management time and attention from revenue generating activities to compliance activities. If our efforts to comply with new or changed laws, regulations and standards differ from the activities intended by regulatory or governing bodies due to ambiguities related to practice, our reputation may be harmed.

 

We have been party to, and may in the future be subject to, lawsuits relating to securities law matters which may result in unfavorable outcomes and significant judgments, settlements and legal expenses which could cause our business, financial condition and results of operations to suffer.

 

In connection with our stock option investigation, we and certain of our current and former officers and directors, as well as our current auditors, were subject to several stockholder derivative actions, securities fraud class actions and/or individual lawsuits filed in federal court against us and certain of our current and former officers and directors. The complaints generally allege that the defendants violated the federal and state securities laws and state law claims for fraud and breach of fiduciary duty. While we have settled the derivative and securities fraud class actions, the individual lawsuits continue to be adjudicated. For more information about the historic litigation described above, see “Summary — Litigation Updates.” The amount of time to resolve these current and any future lawsuits is uncertain, and these matters could require significant management and financial resources which could otherwise be devoted to the operation of our business. Although we have expensed or accrued for certain liabilities that we believe will result from certain of these actions, the actual costs and expenses to defend and satisfy all of these lawsuits and any potential future litigation may exceed our current estimated accruals, possibly significantly. Unfavorable outcomes and significant judgments, settlements and legal expenses in the litigation related to our past stock option granting practices and in any future litigation concerning securities law claims could have material adverse impacts on our business, financial condition, results of operations, cash flows and the trading price of our common stock.

 

Risks Related to the Notes, Our Common Stock and this Offering

 

Although the notes are referred to as senior notes, they will be effectively subordinated to any secured debt we may incur and structurally subordinated to the liabilities of our subsidiaries.

 

The notes are not secured by our assets. The notes are unsecured and will be effectively subordinated to any future secured indebtedness to the extent of the assets securing that indebtedness. In the event of our insolvency, bankruptcy, liquidation, reorganization, dissolution or winding up, or upon acceleration of the notes due to an event of default under the indenture and in certain other events, our assets will be available to pay obligations on the notes only after all obligations on our secured debt have been satisfied. As a result, there may not be sufficient assets remaining to pay amounts due on any or all of the outstanding notes.

 

The notes are obligations exclusively of Rambus. Our subsidiaries are separate and distinct entities and have no obligation to pay amounts due on the notes or to provide us with funds for our payment obligations, whether by dividends, distributions, loans or other payments. Any payment of dividends, distributions, loans or advances by our subsidiaries will also be contingent upon our subsidiaries’ earnings and could be subject to contractual restrictions. In the event of the insolvency, bankruptcy, liquidation, reorganization, dissolution or winding up of the business of any of our subsidiaries, creditors of our subsidiaries generally will have the right to be paid in full before any distribution is made to us or the holders of the notes. In addition, even if we were a creditor of any of our subsidiaries, our rights as a creditor would be subordinate to any security interest in the assets of our subsidiaries and any indebtedness of our subsidiaries senior to that held by us. Accordingly, holders of the notes are structurally subordinated to the claims of our subsidiaries’ creditors, including trade creditors, to the extent of the assets of the indebted subsidiary. This subordination could adversely affect our ability to pay our obligations on the notes. As of March 31, 2009, our subsidiaries had approximately

$1.4 million of liabilities, excluding inter-company obligations, to which the notes would be structurally subordinated.

 

We are leveraged financially, which could adversely affect our ability to adjust our business to respond to competitive pressures and to obtain sufficient funds to satisfy our future research and development needs, and to defend our intellectual property.

 

We have indebtedness. On February 1, 2005, we issued $300 million aggregate principal amount of the existing notes, of which $137 million aggregate principal amount remained outstanding as of March 31, 2009. Upon the completion of the offering of the notes under this prospectus, we will also issue an estimated $150 million aggregate principal amount of new notes (or $172.5 million if the underwriters exercise their over-allotment option in full).

 

The degree to which we are leveraged could have important consequences, including, but not limited to, the following:

 

 

A failure to comply with the covenants and other provisions of our debt instruments could result in events of default under such instruments, which could permit acceleration of our notes. Any required repayment of our notes as a result of an acceleration would lower our current cash on hand such that we would not have those funds available for use in our business.

 

If we are at any time unable to generate sufficient cash flow from operations to service our indebtedness when payment is due, we may be required to attempt to renegotiate the terms of the instruments relating to the indebtedness, seek to refinance all or a portion of the indebtedness or obtain additional financing. There can be no assurance that we will be able to successfully renegotiate such terms, that any such refinancing would be possible or that any additional financing could be obtained on terms that are favorable or acceptable to us.

 

The indenture does not restrict us or our subsidiaries from incurring more debt, and the notes are not protected by financial or other restrictive covenants.

 

The indenture does not restrict us or our subsidiaries from incurring additional debt, including secured debt. In addition, the indenture does not contain any financial covenants, restrict our ability to repurchase our securities, pay dividends or make restricted payments or contain covenants or other provisions to afford holders protection in the event of a transaction that substantially increases our level of indebtedness. Furthermore, the indenture contains only limited protections in the event of a “fundamental change” as defined below under “Description of the Notes — Repurchase of Notes at the Option of Holders upon a Fundamental Change.” We could engage in many types of transactions, such as acquisitions, refinancing or recapitalizations that could substantially affect our capital structure and the value of the notes and our common stock but would not constitute a fundamental change permitting holders to require us to repurchase their notes under the indenture.

We may not have the ability to repurchase the notes in cash upon the occurrence of a fundamental change as required by the indenture governing the notes.

 

Holders of the notes will have the right to require us to repurchase the notes upon the occurrence of a fundamental change as described under “Description of the Notes — Repurchase of Notes at the Option of Holders upon a Fundamental Change.” We may not have sufficient funds to repurchase the notes in cash or to make the required repayment at such time or have the ability to arrange necessary financing on acceptable terms. A fundamental change may also constitute an event of default under, or result in the acceleration of the maturity of, our then-existing indebtedness. Our ability to repurchase the notes in cash may be limited by law or the terms of other agreements relating to our indebtedness outstanding at the time. Our failure to repurchase the notes when required would result in an event of default with respect to the notes. Our inability to pay for your notes that are tendered for repurchase could result in your receiving substantially less than the principal amount of the notes.

 

Some significant restructuring transactions may not constitute a fundamental change, in which case we would not be obligated to offer to repurchase the notes.

 

Upon the occurrence of a fundamental change, you will have the right to require us to repurchase the notes. However, the fundamental change provisions will not afford protection to holders of notes in the event of certain transactions. For example, any leveraged recapitalization, refinancing, restructuring, or acquisition initiated by us will generally not constitute a fundamental change requiring us to repurchase the notes. In addition, changes in the composition of our board of directors, in and of themselves, also will not constitute a fundamental change. In the event of any such transaction, holders of the notes will not have the right to require us to repurchase the notes, even though any of these transactions could increase the amount of our indebtedness, or otherwise adversely affect our capital structure or any credit ratings, thereby adversely affecting the holders of notes.

 

Upon conversion of the notes, we will pay a settlement amount consisting of cash and shares of our common stock, if any, based upon a specified conversion reference period.

 

Generally, we will satisfy our conversion obligation to holders by paying cash and by delivering shares of our common stock based on a daily settlement amount calculated on a proportionate basis for each day of the 20 trading day conversion reference period. Accordingly, upon conversion of a note, holders might not receive any shares of our common stock, or they might receive fewer shares of common stock relative to the conversion value of the note as of the conversion date. In addition, because of the 20 trading day conversion reference period, settlement will be delayed until at least the 22nd trading day following the related conversion date. See “Description of the Notes — Conversion Rights — Payment upon Conversion.” Upon conversion of the notes, you may receive less proceeds than expected because the value of our common stock may decline (or not appreciate as much as you may expect) between the conversion date and the day the settlement amount of your notes is determined. In addition, the manner in which we calculate the settlement amount upon conversion of the notes may:

 

 

Our failure to convert the notes into cash or, if applicable, a combination of cash and shares of our common stock upon exercise of a holder’s conversion right in accordance with the provisions of the indenture would constitute a default under the indenture. In addition, a default under the indenture could lead to a default under existing and future agreements governing our indebtedness, including the indenture governing our existing notes. If, due to a default, the repayment of related indebtedness were to be accelerated after any applicable notice or grace periods, we may not have sufficient funds to repay such indebtedness and the notes.

Provisions of the notes could discourage an acquisition of us by a third party.

 

Certain provisions of the notes could make it more difficult or more expensive for a third party to acquire us. Upon the occurrence of certain transactions constituting a fundamental change, holders of the notes will have the right, at their option, to require us to repurchase, at a cash repurchase price equal to 100% of the principal amount plus accrued and unpaid interest on the notes, all of their notes or any portion of the principal amount of such notes in multiples of $1,000. We may also be required to issue additional shares of our common stock upon conversion of such notes in the event of certain fundamental changes, as described under “Description of the Notes — Conversion of Notes — Adjustment to Conversion Rate upon Certain Fundamental Changes.”

 

The conversion rate of the notes may not be adjusted for all dilutive events.

 

The conversion rate of the notes is subject to adjustment upon certain events, including the issuance of stock dividends on our common stock, the issuance of rights or warrants, subdivisions, combinations, distributions of capital stock, indebtedness or assets, cash dividends or distributions and issuer tender or exchange offers as described under “Description of the Notes — Conversion Rights — Conversion Rate Adjustments.” The conversion rate will not be adjusted for certain other events, including, for example, upon the issuance of additional shares of stock for cash, any of which may adversely affect the trading price of the notes or the common stock issuable upon conversion of the notes. Even if the conversion price is adjusted for a dilutive event, such as a leveraged recapitalization, it may not fully compensate you for your economic loss.

 

You may not be able to convert your notes before March 15, 2014.

 

Prior to March 15, 2014, the notes are convertible only if specified conditions are met. These conditions may not be met. If these conditions for conversion are not met, you will not be able to convert your notes and you may not be able to receive the value of the common stock into which the notes would otherwise be convertible.

 

The adjustment to the conversion rate upon the occurrence of certain fundamental changes may not adequately compensate you for the lost option time value of your notes as a result of such fundamental change.

 

If certain fundamental changes occur prior to the maturity date of the notes, we may be required to adjust the conversion rate of the notes to increase the number of shares issuable upon conversion. The number of additional shares to be added to the conversion rate will be determined based on the date on which the fundamental change becomes effective and the price paid per share of our common stock in the fundamental change as described under “Description of the Notes — Conversion of Notes — Adjustment to Conversion Rate upon Certain Fundamental Changes.” Although this adjustment is designed to compensate you for the lost option value of your notes as a result of the fundamental change, the adjustment is only an approximation of such lost value based upon assumptions made on the date of this prospectus and may not adequately compensate you for such loss. In addition, if the price paid per share of our common stock in the fundamental change is less than $14.85 or more than $100 (subject to adjustment), there will be no such adjustment. Moreover, in no event will the total number of additional shares issuable upon conversion as a result of this adjustment exceed 15.5401 per $1,000 principal amount of the notes, subject to adjustment in the same manner as the conversion rate set forth under “Description of the Notes — Conversion of Notes — Conversion Rate Adjustments.”

 

The notes may not have an active market and their price may be volatile. You may be unable to sell your notes at the price you desire or at all.

 

There is no existing trading market for the notes. As a result, there can be no assurance that a liquid market will develop or be maintained for the notes, that you will be able to sell any of the notes at a particular time (if at all) or that the prices you receive if or when you sell the notes will be above their initial offering price. We do not intend to list the notes on any national securities exchange or arrange for quotation of the

notes on any automated dealer quotation system. The underwriters have advised us that they intend to make a market in the notes after this offering is completed, but they have no obligation to do so and may cease their market-making at any time without notice. In addition, market-making will be subject to the limits imposed by the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The liquidity of the trading market in the notes, and the market price quoted for these notes, may be adversely affected by, among other things:

 

 

Convertible debt markets experienced unprecedented disruptions resulting from, among other things, the instability in the credit and capital markets and the emergency orders on short selling issued by the SEC on September 17 and 18, 2008 (and extended on October 1, 2008). These orders were issued as a stop-gap measure while the U.S. Congress worked to provide a comprehensive legislative plan to stabilize the credit and capital markets. Among other things, these orders temporarily imposed a prohibition on effecting short sales of the common stock of certain financial companies. As a result, the SEC orders made the convertible arbitrage strategy that many convertible note investors employ difficult to execute for outstanding convertible notes of those companies whose common stock was subject to the short sale prohibition. The SEC orders expired at 11:59 p.m., New York City Time, on Wednesday, October 8, 2008. However, the SEC is currently considering instituting other limitations on effecting short sales (such as the uptick rule) and other regulatory organizations may do the same. Any future governmental actions that interfere with the ability of convertible note investors to effect short sales on the underlying common stock would significantly affect the market value of the notes.

 

The price of our common stock, and therefore the price of the notes, may fluctuate significantly, which may make it difficult for holders to resell the notes or the shares issuable upon conversion of the notes when desired or at attractive prices.

 

Prior to electing to convert notes, the holder should compare the price at which our common stock is trading in the market to the conversion price of the notes. Our common stock is listed on the NASDAQ Global Select Market under the symbol “RMBS.” On June 19, 2009, the last reported sale price of our common stock on the NASDAQ Global Select Market was $18.70 per share. The trading price of our common stock has been subject to wide fluctuations which may continue in the future in response to, among other things, the following:

 

 

In addition, the stock market in general, and prices for companies in our industry in particular, have experienced extreme volatility that often has been unrelated to the operating performance of such companies.

These broad market and industry fluctuations may adversely affect the price of our common stock, regardless of our operating performance. Because the notes are convertible into shares of our common stock, volatility or depressed prices of our common stock could have a similar effect on the trading price of our notes. Holders who receive common stock upon conversion also will be subject to the risk of volatility and depressed prices of our common stock. In addition, the existence of the notes may encourage short selling in our common stock by market participants because the conversion of the notes could depress the price of our common stock.

 

Sales of substantial amounts of shares of our common stock in the public market after this offering, or the perception that those sales may occur, could cause the market price of our common stock to decline. Because the notes are convertible into common stock only at a conversion price in excess of the recent trading price, such a decline in our common stock price may cause the value of the notes to decline.

 

In addition, lack of positive performance in our stock price may adversely affect our ability to retain key employees.

 

If securities or industry analysts change their recommendations regarding our stock adversely, our stock price and trading volume could decline.

 

The trading market for our common stock is influenced by the research and reports that industry or securities analysts publish about us, our business or our market. If one or more of the analysts who cover us change their recommendation regarding our stock adversely, our stock price would likely decline. If one or more of these analysts ceases coverage of our company or fails to regularly publish reports on us, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

 

Conversion of the notes, or certain other occurrences with respect to our currently outstanding series of notes, will dilute the ownership interest of existing stockholders, including holders who had previously converted their notes.

 

To the extent we issue common stock upon conversion of the notes, such conversion would dilute the ownership interests of existing stockholders, including holders who had previously converted their notes. Sales of our common stock in the public market or sales of any of our other securities could dilute ownership and earnings per share, and even the perception that such sales could occur and could cause the market price of our common stock to decline. In addition, the existence of our outstanding notes may encourage short selling of our common stock by market participants who expect that the conversion of the notes could depress the prices of our common stock. The market price of our common stock could also decline as a result of sales of shares of our common stock made after this offering or the perception that such sales could occur.

 

We will retain broad discretion in using the net proceeds from this offering and may spend a substantial portion in ways with which you do not agree.

 

We intend to use the net proceeds from this offering for general corporate purposes, which may include financing potential acquisitions and strategic transactions, repayment at maturity of our existing notes, and working capital. As part of our strategic initiatives, we expect to continue to make investments in, or acquire, companies, products or technologies or enter into strategic transactions or other arrangements. Pending these uses, we expect to invest the net proceeds in short-term interest-bearing instruments or other investment-grade securities; however, notwithstanding our current intent, there are no covenants in the notes or indenture requiring us to use the proceeds in this manner. Accordingly, our management will have significant discretion as to the use of the net proceeds of the offering, and you will not have the opportunity, as part of your investment decision, to influence the application of the proceeds. The net proceeds from this offering may be applied to uses that ultimately may not improve our operating results or increase our market value.

 

Sales of a significant number of shares of our common stock in the public markets, or the perception of such sales, could depress the market price of the notes.

 

Sales of a substantial number of shares of our common stock or other equity-related securities in the public markets could depress the market price of the notes, our common stock, or both, and impair our ability

to raise capital through the sale of additional equity securities. We cannot predict the effect that future sales of our common stock or other equity-related securities would have on the market price of our common stock or the value of the notes. The price of our common stock could be affected by possible sales of our common stock by investors who view the notes as a more attractive means of equity participation in our company and by hedging or arbitrage trading activity which we expect to occur involving our common stock. This hedging or arbitrage could, in turn, affect the market price of the notes.

 

The notes may not be rated or may receive a lower rating than anticipated.

 

We do not intend to seek a rating on the notes from a rating agency. However, if one or more rating agencies rates the notes and assigns the notes a rating lower than the rating expected by investors, or reduces their rating in the future, the market price of the notes and our common stock could be adversely affected.

 

You may be subject to tax upon an adjustment to the applicable conversion rate of the notes even though you do not receive a corresponding cash distribution.

 

The applicable conversion rate of the notes is subject to adjustment in certain circumstances, including the payment of certain cash dividends. If the applicable conversion rate is adjusted as a result of a distribution that is taxable to our common stockholders, such as in the case of a cash dividend, you will be deemed to have received a taxable dividend to the extent of our earnings and profits that will be subject to U.S. federal income tax without the receipt of any cash. If certain fundamental changes occur on or prior to the maturity date of the notes, we will increase the applicable conversion rate for notes converted in connection with such fundamental changes. Such increase may be treated as a distribution subject to U.S. federal income tax as a dividend. If you are a non-U.S. holder (as defined in “Certain U.S. Federal Income Tax Considerations”), any such deemed dividend may be subject to U.S. federal withholding tax at a 30% rate, or such lower rate as may be specified by an applicable treaty, which may be set off against subsequent payments on the notes. See “Description of the Notes — Conversion of Notes — Conversion Rate Adjustments,” “Description of the Notes — Conversion of Notes — Adjustment to Conversion Rate upon Certain Fundamental Changes” and “Certain U.S. Federal Income Tax Considerations.”

 

If you hold notes, you will not be entitled to any rights with respect to our common stock, but you will be subject to all changes made with respect to our common stock.

 

If you hold notes, you will not be entitled to any rights with respect to our common stock (including, without limitation, voting rights and rights to receive any dividends or other distributions on our common stock), but you will be subject to all changes affecting the common stock. You will be entitled to rights with respect to the common stock only if and when we deliver shares of common stock to you upon conversion of your notes. For example, if an amendment is proposed to our certificate of incorporation or bylaws requiring stockholder approval and the record date for determining the stockholders of record entitled to vote on the amendment occurs prior to your conversion of notes, you will not be entitled to vote on the amendment, although you will nevertheless be subject to any changes in the powers, preferences or special rights of our common stock or other classes of capital stock.

 

The notes initially will be held in book-entry form and, therefore, you must rely on the procedures and the relevant clearing systems to exercise your rights and remedies.

 

Unless and until certificated notes are issued in exchange for book-entry interests in the notes, owners of the book-entry interests will not be considered owners or holders of notes. Instead, DTC, or its nominee, will be the sole holder of the notes. Payments of principal, interest and other amounts owing on or in respect of the notes in global form will be made to the paying agent, which will make payments to DTC. Thereafter, such payments will be credited to DTC participants’ accounts that hold book-entry interests in the notes in global form and credited by such participants to indirect participants. Unlike holders of the notes themselves, owners of book-entry interests will not have the direct right to act upon our solicitations for consents or requests for waivers or other actions from holders of the notes. Instead, if you own a book-entry interest, you will be permitted to act only to the extent you have received appropriate proxies to do so from DTC or, if applicable,

a participant. We cannot assure you that procedures implemented for the granting of such proxies will be sufficient to enable you to vote on any requested actions on a timely basis.

 

Our restated certificate of incorporation and bylaws, our stockholder rights plan, and Delaware law contain provisions that could discourage transactions resulting in a change in control, which may negatively affect the market price of our common stock into which the notes are convertible.

 

Our restated certificate of incorporation, our bylaws, our stockholder rights plan and Delaware law contain provisions that might enable our management to discourage, delay or prevent change in control. In addition, these provisions could limit the price that investors would be willing to pay in the future for shares of our common stock into which the notes are convertible. Pursuant to such provisions:

 

 

In addition, the provisions in our stockholder rights plan could make it more difficult for a potential acquirer to consummate an acquisition of our company. We are also subject to Section 203 of the Delaware General Corporation Law, which provides, subject to enumerated exceptions, that if a person acquires 15% or more of our outstanding voting stock, the person is an “interested stockholder” and may not engage in any “business combination” with us for a period of three years from the time the person acquired 15% or more of our outstanding voting stock.

 

This prospectus and the documents we incorporate by reference in this prospectus contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Exchange Act. These statements relate to our expectations for future events and time periods. All statements other than statements of historical fact are statements that could be deemed to be forward-looking statements, including, but not limited to, statements regarding:

 

 

 

You can identify these and other forward-looking statements by the use of words such as “may,” “future,” “shall,” “should,” “expects,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “intends,” “potential,” “continue,” or the negative of such terms, or other comparable terminology. Forward-looking statements also include the assumptions underlying or relating to any of the foregoing statements. Actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors. All forward-looking statements included in this document are based on our assessment of information available to us at this time. We assume no obligation to update any forward-looking statements.

 

We estimate that the net proceeds from this offering will be approximately $145,000,000 (or $166,937,500 if the underwriters exercise their over-allotment option to purchase additional notes in full), after deducting underwriters’ discounts and commissions and expenses payable by us.

 

We intend to use the net proceeds from this offering for general corporate purposes, which may include financing potential acquisitions and strategic transactions, repayment of our zero coupon convertible senior notes due February 2010, and working capital. As part of our strategic initiatives, we currently are evaluating, and expect to engage in investments in or acquisitions of companies, products or technologies and the entry into strategic transactions or other arrangements. These acquisitions, investments, transactions or arrangements are likely to range in size, some of which may be significant. Accordingly, as described above, a portion of the net proceeds of this offering may be used for one or more acquisitions, investments or similar arrangements.

 

Pending application for the foregoing purposes, the net proceeds from this offering will be invested in short-term interest bearing instruments or other investment grade securities. As of the date of this prospectus, we cannot specify with certainty all of the particular uses for the net proceeds of the offering. Accordingly, we will retain broad discretion over the use of these proceeds.

 

Our common stock is listed on the NASDAQ Global Select Market under the symbol “RMBS.” The following table sets forth, for the periods indicated, the range of high and low sales prices for our common stock.

 

 

 

 

As of May 31, 2009, there were approximately 755 registered holders of record of our common stock. A substantially greater number of holders of our common stock are in “street name” or beneficial holders, whose shares are held of record by banks, brokers and other financial institutions.

 

The last reported sale price of our common stock on the NASDAQ Global Select Market on June 23, 2009 was $14.85 per share.

 

We have never paid or declared any cash dividends on our common stock or other securities and have no current plans to do so.

 

The ratio of earnings to fixed charges for each of the periods indicated is as follows.

 

 

 

 

The following table sets forth our unaudited cash, cash equivalents, zero coupon convertible senior notes due February 2010 and capitalization as of March 31, 2009:

 

 

You should read this table in conjunction with “Use of Proceeds” as well as our “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements, including the related notes, incorporated by reference into this prospectus and our Quarterly Report on Form 10-Q for the three months ended March 31, 2009, and our Current Report on Form 8-K filed with the SEC on June 22, 2009, each incorporated by reference herein.

 

 

 

 

 

 

We will issue the notes under an indenture to be dated as of June 29, 2009 between us and U.S. Bank National Association, as trustee. The terms of the notes include those expressly set forth in the indenture and the notes and those made part of the indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”).

 

The following description is only a summary of the material provisions of the notes and the indenture. It does not purport to be complete. We urge you to read those documents in their entirety because they, and not this description, define the rights of holders of the notes. You may request copies of those documents from us upon written request at our address, which is listed in this prospectus under “Incorporation of Certain Information by Reference” and “Where You Can Find More Information.”

 

For purposes of this section, references to “we,” “us,” “our,” “the Company” and “Rambus” refer solely to Rambus Inc. and not to its subsidiaries.

 

General

 

The Notes

 

The notes will:

 

 

The indenture will not contain any financial covenants and will not restrict us or our subsidiaries from paying dividends, incurring additional indebtedness or issuing or repurchasing securities. The indenture will contain no covenants or other provisions to afford protection to holders of notes in the event of highly leveraged transactions or a fundamental change of Rambus, except to the extent described under “— Adjustment to Conversion Rate upon Certain Fundamental Changes”, “— Repurchase of Notes at the Option of Holders upon a Fundamental Change” and “— Consolidation, Merger and Sale of Assets.”

 

The notes will be our general unsecured senior obligations, ranking equally in right of payment with all of our existing and future unsecured senior indebtedness, and senior in right of payment to any of our future indebtedness that is expressly subordinated to the notes. The notes will be effectively subordinated to all of our existing and future secured indebtedness to the extent of the value of the collateral securing those

obligations and structurally subordinated to all indebtedness and liabilities of our subsidiaries, including trade credit. As of March 31, 2009, we had approximately $137 million aggregate principal amount of unsecured senior indebtedness outstanding (excluding the notes). In addition, as of March 31, 2009, our subsidiaries had approximately $1.4 million of liabilities, excluding inter-company obligations.

 

No sinking fund is provided for the notes.

 

We will maintain an office where the notes may be presented for registration, transfer, exchange or conversion. This office will initially be an office or agency of the trustee. Except under limited circumstances described below, the notes will be issued only in fully registered book-entry form, without coupons, in denominations of $1,000 principal amount and multiples thereof, and will be represented by one or more global notes. We may pay interest (including additional interest, if any) by means of a check mailed to each holder at its address as it appears in the note register; provided, however, that holders with notes in an aggregate principal amount in excess of $2,000,000 will be paid, at their written election, by wire transfer in immediately available funds; provided further, however, that payments to DTC will be made by wire transfer of immediately available funds to the account of DTC or its nominee. There will be no service charge for any registration of transfer or exchange of notes. We may, however, require holders to pay a sum sufficient to cover any tax or other governmental charge payable in connection with certain transfers or exchanges.

 

Neither we nor the registrar nor the trustee is required to register a transfer or exchange of any notes for which the holder has delivered, and not validly withdrawn, a fundamental change repurchase notice, except, in the case of a partial repurchase, with respect to that portion of the notes not being repurchased.

 

Certain material U.S. federal income tax consequences of the purchase, ownership and disposition of the notes and any shares of our common stock received upon conversion of the notes are summarized in the prospectus under the heading “Certain U.S Federal Income Tax Considerations.”

 

We may, without the consent of the holders of the notes, increase the principal amount of the notes by issuing additional notes in the future on the same terms, except for any differences in the issue price and interest accrued, if any, prior to the issue date of such additional notes; provided that no such additional notes may be issued unless fungible with the notes offered hereby for U.S. federal income tax purposes; and provided further that the additional notes have the same CUSIP number as the notes offered hereby. The notes offered by this prospectus and any additional notes would rank equally and ratably and would be treated as a single class for all purposes under the indenture.

 

We may also from time to time purchase the notes in open market purchases or negotiated transactions without prior notice to holders.

 

Principal; Maturity

 

The indenture will provide for the issuance by us of notes in an amount initially limited to $150,000,000 aggregate principal amount (or $172,500,000 aggregate principal amount if the underwriters exercise in full their over-allotment option to purchase additional notes). The notes and any additional notes will mature on June 15, 2014, unless earlier converted, redeemed or repurchased.

 

Interest

 

The notes will bear interest at a rate of 5% per annum on the principal amount from June 29, 2009. We will pay interest semi-annually, in arrears, on each June 15 and December 15, beginning on December 15, 2009, to holders of record at the close of business on the immediately preceding June 1 and December 1, respectively; provided, however, that:

 

 

Interest on the notes will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from June 29, 2009. Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months. If a payment date is not a business day, payment will be made on the next succeeding business day, and no additional interest will accrue thereon.

 

Interest will cease to accrue on a note upon its maturity, conversion, redemption or repurchase by us at the option of the holder.

 

We will pay additional interest on the notes under the circumstances described under “— Events of Default.”

 

Conversion of Notes

 

General

 

At any time prior to the close of business on the maturity date, a holder may convert its notes into cash and, if applicable, shares of our common stock, only if the conditions described below are satisfied, with settlement to occur as set forth below under “— Payment upon Conversion — Settlement Method.” Holders may only convert notes with a principal amount of $1,000 or a multiple of $1,000. The conversion rate is initially 51.8000 shares of our common stock per $1,000 principal amount of notes (equivalent to a conversion price of $19.31 per share of common stock). The conversion rate is subject to adjustment as described below under “— Conversion Rate Adjustments.”

 

Except as provided in the immediately following sentence and in the next paragraph, no separate payment or adjustment will be made for accrued and unpaid interest and additional interest, if any, on a converted note or for dividends or distributions on any of our common stock issued upon conversion of a note. By delivering to the holder the cash and shares, if any, of our common stock issuable upon conversion, together with a cash payment in lieu of fractional shares, if any, we will satisfy our obligation with respect to the conversion of the notes. Any accrued but unpaid interest and additional interest, if any, will be deemed paid in full upon conversion, rather than cancelled, forfeited or extinguished.

 

If a holder converts notes after the record date for an interest payment but prior to the corresponding interest payment date, it will receive on the corresponding interest payment date the interest accrued and unpaid and additional interest, if any, payable on those notes, notwithstanding the conversion of those notes prior to the interest payment date, assuming such holder was the holder of record on the corresponding record date. However, except as provided in the next sentence, a holder who converts notes after the record date for an interest payment but prior to the corresponding interest payment date must pay us an amount equal to the accrued and unpaid interest and additional interest, if any, payable on the notes being converted on the corresponding interest payment date. Such payment is not required to be made:

 

 

No fractional shares will be issued upon conversion; in lieu thereof, a holder that otherwise would be entitled to fractional shares of our common stock will receive a cash payment of the fractional amount based upon the applicable stock price as described below under “— Payment upon Conversion — Settlement Method.”

If a holder exercises its right to require us to repurchase its notes as described under “— Repurchase of Notes at the Option of Holders upon a Fundamental Change,” such holder may convert its notes only if it withdraws its applicable repurchase notice in accordance with the indenture or if we default in the payment of the repurchase price.

 

Payment upon Conversion

 

Settlement Method.  We will deliver to holders surrendering notes for conversion, in respect of each $1,000 principal amount of notes being converted, a “settlement amount” equal to the sum of the daily settlement amounts for each of the 20 trading days during the conversion reference period. The “daily settlement amount,” for each of the 20 trading days during the conversion reference period, shall consist of:

 

 

The “conversion date” with respect to a note means the date on which the holder of the notes has complied with all requirements under the indenture to convert such note.

 

The “conversion reference period” means:

 

 

The “daily conversion value” means, for each of the 20 consecutive trading days during the conversion reference period, one-twentieth (1/20th) of the product of (i) the conversion rate on such day and (ii) the daily VWAP of our common stock on such day.

 

The “daily VWAP” means, for each of the 20 consecutive trading days during the conversion reference period, the per share volume-weighted average price as displayed under the heading “Bloomberg VWAP” on Bloomberg page RMBS.UQ <EQUITY> AQR <GO> (or its equivalent successor if such page is not available) in respect of the period from 9:30 a.m. to 4:00 p.m., New York City time, on such trading day (or if such volume-weighted average price is unavailable, the market value of one share of our common stock on such trading day determined, using a volume-weighted average method, by a nationally recognized independent investment banking firm retained for this purpose by us); provided that after the occurrence or effectiveness of a fundamental change (as defined below under “— Repurchase of Notes at the Option of Holders upon a Fundamental Change”) in which the holders of our common stock receive only cash, the daily VWAP will be determined to be the cash price per share received by holders of our common stock in such fundamental change.

 

The term “market disruption event” means (1) a failure by the primary U.S. exchange or quotation system on which our common stock trades or is quoted to open for trading during its regular trading session or (2) the occurrence or existence prior to 1:00 p.m., New York City time, on any trading day for our common stock of an aggregate one half-hour period, of any suspension or limitation imposed on trading (by reason of movements in price exceeding limits permitted by the stock exchange or otherwise) in our common stock or in any options, contracts or future contracts relating to our common stock traded in the United States.

 

The term “scheduled trading day” means any day that is scheduled to be a trading day on the primary U.S. exchange or quotation system on which our common stock is listed or admitted for trading, or if our common stock is not so listed or admitted for trading, “scheduled trading day” means a business day.

 

The term “trading day” means a day on which (i) trading in our common stock generally occurs on the NASDAQ Global Select Market or, if our common stock is not then listed on the NASDAQ Global Select Market, on the primary other U.S. national or regional securities exchange on which our common stock is then

listed or, if our common stock is not then listed on a U.S. national or regional securities exchange, on the primary other market on which our common stock is then traded and (ii) there is no market disruption event. If our common stock is not so listed or traded, “trading day” shall mean a business day.

 

We will deliver cash in lieu of any fractional share of common stock issuable in connection with payment of the settlement amount based on the daily VWAP for the final trading day of the applicable conversion reference period.

 

The daily conversion value and the number of shares, if any, to be delivered upon conversion of the notes will be determined by us promptly after the end of the conversion reference period. Except as set forth below under “— Adjustment to Conversion Rate upon Certain Fundamental Changes,” we will pay the cash and deliver the shares of common stock, if any, no later than the third business day after the end of such period.

 

The ability to surrender notes for conversion will expire at the close of business on the third business day immediately preceding the maturity date.

 

Exchange in Lieu of Conversion.  When a holder surrenders notes for conversion, we may direct the conversion agent to surrender, on or prior to the commencement of the applicable conversion reference period, such notes to a financial institution designated by us for exchange in lieu of conversion, which shall be a direct or indirect DTC participant. In order to accept any notes surrendered for conversion, the designated institution must agree to deliver, in exchange for such notes, all cash and shares of our common stock due upon conversion, if any, all as provided above under “— Payment upon Conversion,” at the sole option of the designated financial institution and as is designated to the conversion agent by us. By the close of business on the second trading day after the applicable conversion date, we will notify the holder surrendering notes for conversion that we have directed the designated financial institution to make an exchange in lieu of conversion and such financial institution will be required to notify the conversion agent whether it will deliver, upon exchange, the cash and shares of common stock, if any, due in respect of such conversion.

 

If the designated institution accepts any such notes, it will deliver cash and shares of our common stock, if any, to the conversion agent and the conversion agent will deliver such cash and shares of our common stock, if any, to such holder on the third business day immediately following the last day of the applicable conversion reference period. Any notes exchanged by the designated institution will remain outstanding. If the designated institution agrees to accept any notes for exchange but does not timely deliver the related consideration, or if such designated financial institution does not accept the notes for exchange, we will convert the notes into cash and shares of our common stock, if any, as described above under “— Conversion of Notes.”

 

Our designation of an institution to which the notes may be submitted for exchange does not require the institution to accept any notes. We will not pay any consideration to, or otherwise enter into any agreement with, the designated institution for or with respect to such designation.

 

Conversion Based on Common Stock Price.  A holder may surrender notes for conversion during any calendar quarter beginning after September 30, 2009, and only during such calendar quarter, if the closing sale price of our common stock for 20 or more trading days in a period of 30 consecutive trading days ending on the last trading day of such preceding calendar quarter is more than 130% of the conversion price, as defined below, per share of common stock on the last trading day of such preceding calendar quarter, which we refer to as the conversion trigger price.

 

The “closing sale price” of our common stock on any trading day means the reported last sale price per share (or, if no last sale price is reported, the average of the bid and ask prices per share or, if more than one in either case, the average of the average bid and the average ask prices per share) on such date reported by the NASDAQ Global Select Market or, if our common stock is not quoted or listed for trading on the NASDAQ Global Select Market, as reported by the principal U.S. national or regional securities exchange on which our common stock is listed.

 

The “conversion price” per share of common stock as of any time means $1,000 divided by the then-applicable conversion rate, rounded to the nearest cent.

The “conversion trigger price” is approximately $19.31, which is 130% of the initial conversion price per share of common stock, subject to adjustment upon occurrence of any of the events in respect of which the conversion rate would be subject to adjustment as described under “— Conversion Rate Adjustments” below.

 

The conversion agent will, on our behalf, determine at the beginning of each calendar quarter commencing at any time after September 30, 2009 whether the notes are convertible as a result of the price of our common stock and notify us and the trustee.

 

Conversion Based on Trading Price of Notes.  A holder may surrender notes for conversion prior to maturity during the five business day period following any 10 consecutive trading day period in which the trading price per $1,000 principal amount of notes, as determined by the bid solicitation agent, which shall initially be the trustee, following a request by us in accordance with the procedures described below, for each trading day of such 10 consecutive trading day period was less than 98% of the product of the closing sale price of our common stock for such trading day and the applicable conversion rate (determined for this purpose in the manner described below).

 

The “trading price” of the notes on any date of determination means the average of the secondary market bid quotations per note obtained by the bid solicitation agent for $2,000,000 aggregate principal amount of notes at approximately 3:30 p.m., New York City time, on the determination date from three independent nationally recognized securities dealers that we select, which may include any of the underwriters; provided that if three such bids cannot reasonably be obtained by the bid solicitation agent, but two such bids are obtained, then the average of the two bids shall be used, and if only one such bid can reasonably be obtained by the bid solicitation agent, that one bid shall be used. If the bid solicitation agent cannot reasonably obtain at least one bid for $2,000,000 principal amount of the notes from a nationally recognized securities dealer, then the trading price per $1,000 principal amount of the notes will be deemed to be less than 98% of the product of the closing sale price of our common stock for such trading day and the applicable conversion rate for such date of determination.

 

In connection with any conversion upon satisfaction of the trading price condition, the bid solicitation agent shall have no obligation to determine the trading price of the notes for this purpose unless we have requested such determination in writing, and we shall have no obligation to make such request unless a holder of at least $2,000,000 principal amount of notes provides us with reasonable evidence that the trading price of the notes on any date would be less than 98% of the product of the closing sale price and the applicable conversion rate on such date and such holder requests that we request the bid solicitation agent determine the trading price of the notes. At such time, we shall instruct the bid solicitation agent to determine the trading price of the notes beginning on the next trading day and on each successive trading day until the trading price per $1,000 principal amount of notes is greater than or equal to 98% of the product of the closing sale price and the applicable conversion rate on such date. If we do not, when obligated to, instruct the bid solicitation agent to determine the trading price of the notes as provided in the preceding sentence, then the trading price per $1,000 principal amount of notes will be deemed to be less than 98% of the product of the closing sale price and the applicable conversion rate on each day that we fail to so instruct the bid solicitation agent.

 

Conversion Based on Distributions to Holders of Our Common Stock

 

If we elect to:

 

 

we will notify the holders of notes and the trustee at least 25 scheduled trading days prior to the ex date (as defined below under “— Conversion Rate Adjustments — Adjustment Events”) for such distribution. Once we have given such notice, holders may surrender their notes for conversion until the earlier of the close of business on the business day immediately prior to the ex date and our announcement that such distribution will not take place. Holders of the notes, however, may not surrender their notes for conversion if they are otherwise able to participate in such distribution due to the participation of holders of the notes in such distribution.

 

Conversion Based on a Fundamental Change

 

If a transaction or event that constitutes a fundamental change (as defined below under “— Repurchase of Notes at the Option of Holders upon a Fundamental Change,” and without giving effect to the exception regarding publicly traded securities contained in the paragraph immediately following that definition) occurs, regardless of whether a holder has the right to require us to repurchase the notes as described under “— Repurchase of Notes at the Option of Holders upon a Fundamental Change,” we must notify holders of the notes (1) as soon as practicable and in any event at least 25 scheduled trading days prior to its anticipated effective date of such transaction, in the case of a transaction that is known to us, or within two trading days after we become aware of such transaction, in the case of a transaction that is not known to us prior to such 25th scheduled trading day and (2) within 15 business days after the effective date of such transaction. Once we have given such notice, holders may surrender notes for conversion at any time beginning 10 trading days before the anticipated effective date of such transaction until 35 calendar days after the actual effective date of such transaction (or if such transaction also constitutes a fundamental change, until the close of business on the business day immediately preceding the related fundamental change repurchase date, if later).

 

Conversion upon Notice of Redemption

 

If we call any or all of the notes for redemption, holders may convert notes into our common stock at any time prior to the close of business on the business day immediately preceding the redemption date, even if the notes are not otherwise convertible at such time. If the holder already has delivered a fundamental change repurchase notice with respect to a note, however, the holder may not surrender that note for conversion until the holder has withdrawn the repurchase notice in accordance with the indenture. See “— Repurchase of Notes at the Option of Holders upon a Fundamental Change.”

 

Conversion Prior to Maturity

 

A holder may surrender notes for conversion at any time during the period beginning March 15, 2014, and ending at the close of business on the third business day immediately preceding the maturity date.

 

Adjustment to Conversion Rate upon Certain Fundamental Changes

 

If a holder elects to convert its notes in connection with a fundamental change described under clause (1) or (2) of the definition of a fundamental change (as described, and subject to the conditions set forth, below under, “— Repurchase of Notes at the Option of Holders upon a Fundamental Change” (each such fundamental change, a “make-whole fundamental change”)), we will increase the conversion rate as described below for notes so surrendered for conversion. The number of additional shares by which the conversion rate is increased (the “additional shares”) will be determined by reference to the table below, based on the date on which the make-whole fundamental change becomes effective (the “effective date”) and the price (the “stock price”) paid, or deemed to be paid, per share for our common stock in the transaction or series of related transactions constituting such make-whole fundamental change, subject to adjustment as described in the second paragraph following this paragraph, below. If holders of our common stock receive only cash in such transaction, the stock price will be the cash amount paid per share. Otherwise, the stock price will be the average of the closing sale prices of our common stock on the five trading days prior to but excluding the effective date of such make-whole fundamental change. We will notify you of the anticipated effective date of any make-whole

fundamental change resulting in an adjustment as soon as practicable and if possible at least 10 trading days prior to such date.

 

A conversion of the notes by a holder will be deemed for these purposes to be “in connection with” a make-whole fundamental change if the conversion notice is received by the conversion agent during the period that begins on (and includes) the first public announcement of an event constituting a make-whole fundamental change and ends at the close of business on the business day immediately preceding the related repurchase date (as specified in the repurchase notice described under “— Repurchase of Notes at the Option of Holders upon a Fundamental Change”).

 

The number of additional shares issuable upon conversion will be adjusted in the same manner as and as of any date on which the conversion rate of the notes is adjusted as described above under “— Conversion Rate Adjustments.” The stock prices set forth in the first row of the table below (i.e., the column headers) will be simultaneously adjusted to equal the stock prices immediately prior to such adjustment, multiplied by a fraction, the numerator of which is the conversion rate immediately prior to the adjustment and the denominator of which is the conversion rate as so adjusted.

 

The following table sets forth an indicative number of additional shares to be received per $1,000 principal amount of notes:

 

 

The exact stock price and effective dates may not be set forth on the table, in which case, if the stock price is:

 

 

Notwithstanding the foregoing, in no event will the total number of additional shares of our common stock issuable upon conversion exceed 15.5401 per $1,000 principal amount of the notes, subject to adjustments in the same manner as the conversion rate.

 

Our obligation to deliver the additional shares to holders that convert their notes in connection with a fundamental change could be considered a penalty, in which case the enforceability thereof would be subject to general equitable principles of reasonableness of economic remedies.

 

If, as described above, we are required to increase the conversion rate by the additional shares as a result of a make-whole fundamental change, notes surrendered for conversion will be settled as follows (subject in all respects to the provisions set forth above under “Payment upon Conversion — Settlement Method”):

 

 

 

Because we may not deliver the consideration due solely as a result of the increase in the conversion rate described above until after the effective date of the make-whole fundamental change, the non-cash consideration due in respect of the excess of the daily conversion value over $50, if any, may not consist of shares of our common stock as a result of the provisions described below under the caption “— Conversion Rate Adjustments — Treatment of Reference Property.” Accordingly, to the extent the daily conversion value on any trading day during the conversion reference period exceeds $50, the non-cash consideration due in respect of such excess may be paid in reference property.

 

Conversion Rate Adjustments

 

Adjustment Events.  The conversion rate will be adjusted as described below, except that we will not make any adjustments to the conversion rate if holders of the notes participate, as a result of holding the notes, in any of the transactions described below without having to convert their notes.

 

 

CR1		=		CR0		x		OS1
								OS0

 

 

Any adjustment made pursuant to this clause (1) shall become effective immediately after the opening of business on the ex date for such dividend or distribution, or the effective date for such subdivision or combination. If any dividend or distribution of the type described in this clause (1) is declared but not

paid or made, or the outstanding shares of common stock are not subdivided or combined, as the case may be, the conversion rate shall be immediately readjusted, effective as of the date our board of directors determines not to pay such dividend or distribution, or to effect such subdivision or combination to the conversion rate that would then be in effect if such dividend, distribution, or subdivision or combination had not been declared or announced.

 

 

CR1		=		CR0 x			OS0 + X
							OS0 + Y

 

 

The foregoing adjustment shall be successively made whenever any such rights, warrants or options are distributed and shall become effective immediately after the opening of business on the ex date for such issuance. If such rights, warrants or options are not so issued, the conversion rate will be adjusted to be the conversion rate that would then be in effect if such ex date for such issuance had not been fixed. In addition, to the extent that shares of our common stock are not delivered after the expiration of such rights, warrants or options, the conversion rate shall be readjusted to the conversion rate that would then be in effect had the adjustments made upon the issuance of such rights, warrants or options been made on the basis of only the number of shares of common stock actually delivered.

 

In determining whether any rights, warrants or options entitle the holders to subscribe for or purchase shares of common stock at less than such average of the closing sale prices, and in determining the aggregate offering price of such shares of common stock, there shall be taken into account any consideration received by us for such rights, warrants or options and any amount payable on exercise or conversion thereof, with the value of such consideration, if other than cash, to be determined by our board of directors.

 

 

 

 

then the conversion rate will be adjusted based on the following formula:

 

CR1		=		CR0 x		SP0
						SP0 − FMV

 

 

With respect to an adjustment pursuant to this clause (3) where there has been a payment of a dividend or other distribution on our common stock of shares of capital stock of any class or series, or similar equity interest, of or relating to a subsidiary or other business unit, which we refer to as a “spin-off,” the conversion rate in effect immediately before 5:00 p.m., New York City time, on the effective date of the spin-off will be increased based on the following formula:

 

CR1		=		CR0 x		FMV0 + MP0
						MP0

 

 

The adjustment to the conversion rate under the preceding paragraph will occur on the last day of the valuation period; provided that in respect of any conversion during the valuation period, references with respect to 10 trading days shall be deemed replaced with such lesser number of trading days as have elapsed between the effective date of such spin-off and the conversion date in determining the applicable conversion rate.

 

If any dividend or distribution described in this clause (3) is not so paid or made, the conversion rate shall again be adjusted to the conversion rate that would then be in effect if such dividend or distribution had not been declared.

 

CR1		=		CR0 x		SP0
						SP0 - C

 

 

The adjustment to the conversion rate under clause (4) will become effective immediately after the opening of business on the ex date for such dividend or distribution. If such dividend or distribution is not so paid or made, the conversion rate shall again be adjusted to be the conversion rate that would then be in effect if such dividend or distribution had not been declared.

 

 

CR1		=		CR0 x		AC + (SP1 x OS1)
						OS0 x SP1

 

 

The adjustment to the conversion rate under the preceding paragraph will occur at the close of business on the 10th trading day from, and including, the trading day next succeeding the date such tender or exchange offer expires; provided that in respect of any conversion within 10 trading days immediately following, and including, the expiration date of any tender or exchange offer, references with respect to 10 trading days shall be deemed replaced with such lesser number of trading days as have elapsed between the expiration date of such tender or exchange offer and the conversion date in determining the applicable conversion rate.

 

Except as stated herein, we will not adjust the conversion rate for the issuance of shares of our common stock or any securities convertible into or exchangeable for shares of our common stock or the right to purchase shares of our common stock or such convertible or exchangeable securities. If, however, the

application of the foregoing formulas would result in a decrease in the conversion rate, no adjustment to the conversion rate will be made (other than as a result of a share split or share combination).

 

As used in this section, “ex date” means the first date on which the shares of our common stock trade on the applicable exchange or in the applicable market, regular way, without the right to receive the issuance, dividend or distribution in question.

 

To the extent that we have a preferred stock rights plan in effect upon conversion of the notes, we will be required under the indenture to provide that the holders of the notes who receive shares of common stock upon such conversion will receive rights upon conversion of the notes, unless those rights were separated from the common stock prior to conversion, in which case, and only in such case, the conversion rate will be adjusted at the time of separation as if we issued rights, warrants or options to all or substantially all holders of our common stock as provided in paragraph (2) above, subject to readjustment in the event of the expiration, termination or redemption of such rights, subject to certain limited exceptions. For a description of our rights plan, see the section of this prospectus captioned, “Description of Capital Stock.”

 

You may, in some circumstances, be deemed to have received a distribution or dividend subject to U.S. federal income tax as a result of an adjustment or the nonoccurrence of an adjustment to the conversion rate. See “Certain U.S. Federal Income Tax Considerations” below for a relevant discussion.

 

We are permitted to increase the conversion rate of the notes by any amount for a period of at least 20 days if our board of directors determines that such increase would be in our best interest. We may also increase the conversion rate to avoid or diminish income tax to holders of our common stock in connection with a dividend or distribution of stock or similar event.

 

No adjustment in the conversion rate shall be required unless the adjustment would result in a change in the conversion rate of at least 1.0%; provided, however, that any adjustment which by reason of the foregoing is not required to be made shall be carried forward and taken into account in determining any subsequent adjustment or in connection with any conversion of notes. Adjustments to the applicable conversion rate will be calculated to the nearest 1/10,000^th of a share. Except as stated above, we will not adjust the conversion rate on the notes for the issuance of our common stock or any securities convertible into or exchangeable for our common stock or the right to purchase our common stock or such convertible or exchangeable securities.

 

Treatment of Reference Property.  In the event of:

 

 

in which holders of our outstanding common stock would be entitled to receive shares of stock, or other securities, property, assets or cash (or any combination thereof) for their common stock, then, at the effective time of the transaction, we, or such successor, purchasing or transferee person, as the case may be, shall execute and deliver to the trustee a supplemental indenture providing that a holder shall have the right to convert such note into the kind and amount of shares of stock, or other securities, property, assets or cash (or combination thereof) that a holder of a number of shares of common stock equal to the conversion rate prior to such transaction would have owned or been entitled to receive (the “reference property”) in connection with such transaction. However, at and after the effective time of such transaction (x) the amount otherwise payable in cash upon conversion of the notes as set forth under “— Payment upon Conversion” above will continue to be payable in cash, (y) the number of shares of our common stock otherwise deliverable upon the conversion of the notes as set forth under “— Payment upon Conversion” above will instead be deliverable in the amount and type of reference property that a holder of that number of shares of our common stock would have received in such transaction and (z) the daily VWAP will be calculated based on the value of a unit of reference property that a holder of one share of our common stock would have received in such transaction. If

the transaction causes our common stock to be converted into the right to receive more than a single type of consideration (determined based in part upon any form of stockholder election), the reference property into which the notes will be convertible will be deemed to be the weighted average of the types and amounts of consideration received by the holders of our common stock that affirmatively make such election.

 

Events That Will Not Result in Adjustment.  The conversion rate will not be adjusted, among other things:

 

 

Conversion Procedures

 

The right of conversion attaching to any note may be exercised (1) if such note is represented by a global note, by book-entry transfer to the conversion agent (which will initially be the trustee) through the facilities of DTC, or (2) if such note is represented by a certificated security, by delivery of such note at the specified office of the conversion agent, accompanied, in either case, by a duly signed and completed conversion notice and appropriate endorsements and transfer documents if required by the conversion agent. In each case, a conversion notice must also be accompanied by the payment of any funds required to be paid in respect of accrued and unpaid interest (including additional interest, if any) and/or taxes, as described further below. Once delivered, a conversion notice will be irrevocable.

 

The conversion date will be the date on which the note and all of the items required for conversion shall have been so delivered and the requirements for conversion have been met. The notes will be deemed to have been converted immediately prior to the close of business on the conversion date.

 

Except as provided in the immediately following sentence and in the next paragraph, no separate payment or adjustment will be made for accrued and unpaid interest on a converted note or for dividends or distributions on any of our common stock issued upon conversion of a note. By delivering to the holder the cash and shares, if any, of our common stock issuable upon conversion, together with a cash payment in lieu of fractional shares, if any, we will satisfy our obligation with respect to the conversion of the notes. Any accrued but unpaid interest will be deemed paid in full upon conversion, rather than cancelled, forfeited or extinguished.

 

If a holder converts notes after the record date for an interest payment but prior to the corresponding interest payment date, it will receive on the corresponding interest payment date the interest accrued and unpaid on those notes, notwithstanding the conversion of those notes prior to the interest payment date, assuming such holder was the holder of record on the corresponding record date. However, except as provided in the next sentence, a holder who converts notes after the record date for an interest payment but prior to the corresponding interest payment date must pay us an amount equal to the interest that has accrued and will be paid on the notes being converted on the corresponding interest payment date. Such payment is not required to be made:

 

 

 

Holders of notes are not required to pay any taxes or duties relating to the issuance or delivery of our common stock upon exercise of conversion rights, but they are required to pay any tax or duty which may be payable relating to any transfer involved in the issuance or delivery of the common stock in a name other than the name of the holder of the note. Certificates representing shares of our common stock will be issued or delivered only after all applicable taxes and duties, if any, payable by the holder have been paid.

 

Except as set forth above under “— Adjustment to Conversion Rate upon Certain Fundamental Changes,” upon conversion of any notes, we will pay the cash and deliver the shares of common stock, if any, into which such notes are convertible no later than the third business day after the expiration of the conversion reference period.

 

Delivery of shares will be accomplished by delivery to the conversion agent of certificates for the relevant number of shares, other than in the case of holders of notes in book-entry form with DTC, which shares shall be delivered in accordance with DTC customary practices. A holder will not be entitled to any rights as a holder of our common stock, including, among other things, the right to vote and receive dividends and notices of stockholder meetings, until the shares are received.

 

Optional Redemption

 

We may not redeem any of the notes at our option prior to June 15, 2012.

 

At any time on or after June 15, 2012, we will have the right, at our option, to redeem the notes in whole or in part for cash if the closing sale price of our common stock for at least 20 of the 30 consecutive trading days immediately prior to any date we give a notice of redemption is greater than 130% of the conversion price on the date of such notice. The redemption price will equal 100% of the principal amount of the notes to be redeemed, together with accrued and unpaid interest (including additional interest, if any), if any, on the principal amount of the notes redeemed, to but not including the date of redemption. However, if the redemption date falls after a record date and on or prior to the corresponding interest payment date, we will pay the full amount of accrued and unpaid interest (including additional interest, if any), if any, due on such interest payment date to the holder of record at the close of business on the corresponding record date, and not to the holder submitting the notes for redemption, if different. We will make at least six semi-annual interest payments (including the interest payments due on December 15, 2009 and June 15, 2012) in the full amount required by the indenture before we redeem the notes at our option.

 

If fewer than all of the notes are to be redeemed, the trustee will select the notes to be redeemed (in principal amounts of $1,000 or a multiple of $1,000) by lot, on a pro rata basis or by any other method the trustee considers fair and appropriate. If any note is to be redeemed in part only, a new note in principal amount equal to the unredeemed principal portion will be issued. If a portion of a holder’s notes is selected for partial redemption and the holder converts a portion of its notes, the converted portion will be deemed to be from the portion selected for redemption.

 

We are required to give notice of redemption on a date that is not less than 20 nor more than 60 calendar days before the redemption date to each holder of notes to be redeemed.

 

In the event of any redemption in part, we will not be required to:

 

 

No sinking fund is provided for the notes.

Repurchase of Notes at the Option of Holders upon a Fundamental Change

 

In the event of a fundamental change (as defined below in this section) each holder will have the right, at its option, subject to the terms and conditions of the indenture, to require us to repurchase, in whole or in part, the holder’s notes in multiples of $1,000 principal amount, at a price in cash for each $1,000 principal amount of such notes equal to 100% of the principal amount of such notes tendered, plus any accrued and unpaid interest (including any additional interest), if any, to, but excluding, the repurchase date. However, if the repurchase date is after a regular record date but on or prior to the corresponding interest payment date, the interest will be paid on the repurchase date to the holder of record on such record date. We will be required to repurchase the notes on the date specified by us that is not less than 20 nor more than 45 business days after the date we give you notice.

 

Within 15 business days after a fundamental change has become effective, we must mail to all holders of notes at their addresses shown in the register of the registrar and to beneficial owners as required by applicable law a notice regarding the fundamental change, which notice must state, among other things:

 

 

To exercise this right, the holder must transmit to the paying agent a written notice, and such repurchase notice must be received by the paying agent no later than the close of business on the business day immediately preceding the repurchase date. The repurchase notice must state:

 

 

A holder may withdraw any repurchase notice (in whole or in part) by delivering to the paying agent a written notice of withdrawal prior to the close of business on the business day immediately preceding the repurchase date. The notice of withdrawal must state:

 

 

If the notes are not in certificated form, the foregoing notices from holders must comply with the applicable DTC procedures.

In connection with any repurchase, we will, to the extent applicable:

 

 

Our obligation to pay the repurchase price for a note for which a repurchase notice has been delivered and not validly withdrawn is conditioned upon delivery of the note, together with necessary endorsements, to the paying agent at any time after the delivery of such repurchase notice. We will cause the repurchase price for such note to be paid promptly following the later of the repurchase date or the time of delivery of such note.

 

If the paying agent holds money sufficient to pay the repurchase price of a note for which a repurchase notice has been delivered on the repurchase date in accordance with the terms of the indenture, then, immediately after the repurchase date, the notes will cease to be outstanding, whether or not the notes are delivered to the paying agent. Thereafter, all other rights of the holder shall terminate, other than the right to receive the repurchase price upon delivery of the note.

 

A “fundamental change” will be deemed to have occurred upon the occurrence of any of the following:

 

(1) any “person” or “group” (other than us, our subsidiaries or our respective employee benefit plans) files a Schedule 13D or Schedule TO, or any successor schedule, form or report under the Exchange Act, disclosing, or we otherwise become aware, that such person is or has become the “beneficial owner,” directly or indirectly, of shares of our voting stock representing 50% or more of the total voting power of all outstanding classes of our voting stock or has the power, directly or indirectly, to elect a majority of the members of our board of directors;

 

(2) we consolidate with, or merge with or into, another person or we sell, assign, convey, transfer, lease or otherwise dispose of all or substantially all of our assets, or any person consolidates with, or merges with or into, us, in any such event other than pursuant to a transaction in which (a) our common stock is not changed or exchanged except to the extent necessary to reflect a change in the jurisdiction of our organization or (b) the persons that “beneficially owned” directly or indirectly, the shares of our voting stock immediately prior to such transaction beneficially own, directly or indirectly, shares of voting stock representing a majority of the total voting power of all outstanding classes of voting stock of the surviving or transferee person;

 

(3) the common stock into which the notes are then convertible ceases to be listed for trading on the NASDAQ Global Select Market, the New York Stock Exchange or another U.S. national securities exchange and is not then quoted on an established automated over-the-counter trading market in the United States; or

 

(4) the adoption of a plan relating to our liquidation or dissolution.

 

However, a fundamental change will not be deemed to have occurred if in the case of a merger or consolidation, at least 90% of the consideration (excluding cash payments for fractional shares and cash payments pursuant to dissenters’ appraisal rights) in the merger or consolidation constituting the fundamental change consists of common stock or depositary receipts traded or quoted on a U.S. national securities exchange (or which will be so traded or quoted when issued or exchanged in connection with such fundamental change) and as a result of such transaction or transactions the notes become convertible solely into such common stock.

 

For purposes of this fundamental change definition:

 

 

 

The term “all or substantially all” as used in the definition of fundamental change will likely be interpreted under applicable state law and will be dependent upon particular facts and circumstances. There may be a degree of uncertainty in interpreting this phrase. As a result, we cannot assure holders how a court would interpret this phrase under applicable law if holders elect to exercise their rights following the occurrence of a transaction which such holders believe constitutes a transfer of “all or substantially all” of our assets.

 

This fundamental change repurchase feature may make more difficult or discourage a takeover of us and the removal of incumbent management. We are not, however, aware of any specific effort to accumulate shares of our common stock or to obtain control of us by means of a merger, tender offer, solicitation or otherwise. In addition, the fundamental change repurchase feature is not part of a plan by management to adopt a series of anti-takeover provisions. Instead, the fundamental change repurchase feature is a result of negotiations between us and the underwriters.

 

We could, in the future, enter into certain transactions, including recapitalizations, that would not constitute a fundamental change but would increase the amount of debt, including other senior indebtedness, outstanding or otherwise adversely affect a holder. Neither we nor our subsidiaries are prohibited from incurring debt, including other senior indebtedness, under the indenture. The incurrence of significant amounts of additional debt could adversely affect our ability to service our debt, including the notes.

 

We may be unable to repurchase the notes at your option upon the occurrence of a fundamental change. Any future credit agreements or other agreements relating to our indebtedness may contain provisions prohibiting repurchase of the notes under certain circumstances, or expressly prohibit our repurchase of the notes upon a fundamental change or may provide that a fundamental change constitutes a default under that agreement. If a repurchase date occurs at a time that we are prohibited from repurchasing notes, we would be required to seek the consent of our lenders to repurchase the notes or attempt to refinance this debt. If we were unable to obtain consent, we would not be permitted to repurchase the notes. Our failure to repurchase tendered notes would constitute an event of default under the indenture, which might constitute a default under the terms of our other indebtedness.

 

Reports

 

The indenture governing the notes will provide that any document or report that we are required to file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act will be delivered to the trustee within 30 days after such document or report is required to be filed with the SEC.

 

Events of Default

 

Each of the following constitutes an event of default with respect to the notes:

 

(1) default in the payment when due of any principal of any of the notes at maturity, upon redemption or upon exercise of a repurchase right or otherwise;

 

(2) default in the payment of any interest, including additional interest, if any, on any of the notes, when the interest becomes due and payable, and continuance of such default for a period of 30 days;

 

(3) our failure to deliver cash or cash and shares of our common stock (including any additional shares deliverable as a result of a conversion in connection with a make-whole fundamental change) when required to be delivered upon the conversion of any note;

 

(4) default in our obligation to provide notice of the occurrence of a fundamental change when required by the indenture;

 

(5) our failure to comply with any of our other agreements in the notes or the indenture (other than those referred to in clauses (1) through (4) above) for 60 days after our receipt of written notice to us of such default from the trustee or to us and the trustee of such default from holders of not less than 25% in aggregate principal amount of the notes then outstanding;

 

(6) our failure to pay when due the principal of, or acceleration of, any indebtedness for money borrowed by us or any of our subsidiaries in excess of $30,000,000 principal amount, if such indebtedness is not discharged, or such acceleration is not annulled, by the end of a period of ten days after written notice to us by the trustee or to us and the trustee by the holders of at least 25% in aggregate principal amount of the notes then outstanding; and

 

(7) certain events of bankruptcy, insolvency or reorganization relating to us or any of our material subsidiaries (as defined in the indenture).

 

If an event of default, other than an event of default described in clause (7) above with respect to us occurs and is continuing, either the trustee or the holders of at least 25% in aggregate principal amount of the notes then outstanding may declare the principal amount of, and accrued and unpaid interest, including additional interest, if any, on the notes then outstanding to be immediately due and payable. If an event of default described in clause (7) above occurs with respect to us the principal amount of and accrued and unpaid interest, including additional interest, if any, on the notes will automatically become immediately due and payable.

 

Notwithstanding the foregoing, the indenture will provide that, to the extent elected by us, the sole remedy for an event of default relating to the failure to file any documents or reports that we are required to file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act, after taking into account any grace period afforded by Rule 12b-25 of the Exchange Act, and for any failure to comply with the requirements of Section 314(a)(1) of the Trust Indenture Act or of the covenant described above in “— Reports,” will (i) for the first 120 days after the occurrence of such an event of default consist exclusively of the right to receive additional interest on the notes at an annual rate equal to 0.25% of the principal amount of the notes and (ii) for the next 90 days after the expiration of such 120 day period consist exclusively of the right to receive additional interest on the notes at an annual rate equal to 0.50% of the principal amount of the notes. If we so elect, such additional interest will be payable on all outstanding notes from and including the date on which such event of default first occurs to but excluding the 210th day thereafter (or such earlier date on which the event of default relating to a failure to comply with such requirements has been cured or waived). On the 210th day after such event of default (or earlier, if the event of default is cured or waived prior to such 210th day), additional interest will cease to accrue and, if the event of default has not been cured or waived, the notes will be subject to the acceleration as provided above. The provisions of the indenture described in this paragraph will not affect the rights of holders of notes in the event of the occurrence of any other event of default. To the extent we elect to pay additional interest, it will be payable at the same time, in the same

manner and to the same persons as ordinary interest. If we do not elect to pay additional interest upon an event of default in accordance with this paragraph, the notes will be subject to acceleration as provided above.

 

In order to elect to pay additional interest as the sole remedy during the first 210 days after the occurrence of an event of default relating to the failure to comply with the reporting obligations in accordance with the immediately preceding paragraph, we must notify all holders of notes and the trustee and paying agent of such election on or before the close of business on the date on which such event of default occurs. Upon our failure to timely give such notice, the notes will be subject to acceleration as provided above.

 

At any time after a declaration of acceleration has been made, but before a judgment or decree for payment of money has been obtained by the trustee, and subject to applicable law and certain other provisions of the indenture, the holders of a majority in aggregate principal amount of the notes then outstanding may, under certain circumstances, rescind and annul such acceleration.

 

Subject to the indenture, applicable law and the trustee’s indemnification, the holders of a majority in aggregate principal amount of the outstanding notes will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust or power conferred on the trustee with respect to the notes.

 

No holder will have any right to institute any proceeding under the indenture, or for the appointment of a receiver or a trustee, or for any other remedy under the indenture unless:

 

 

However, the above limitations do not apply to a suit instituted by a holder for the enforcement of payment of the principal of or any accrued and unpaid interest, including additional interest, if any, on any note on or after the applicable due date or the right to convert the note in accordance with the indenture.

 

Generally, the holders of not less than a majority of the aggregate principal amount of outstanding notes may waive any default or event of default other than:

 

 

We are required to furnish the trustee, on an annual basis, a statement by our officers as to whether or not we, to the officers’ knowledge, are in default in the performance or observance of any of the terms, provisions and conditions of the indenture, specifying any known defaults.

Consolidation, Merger and Sale of Assets

 

We may not, in a single transaction or series of related transactions, consolidate with or merge with or into any person or sell, convey, transfer or lease all or substantially all of our properties and assets to another person, unless:

 

 

When such a person assumes our obligations in such circumstances, subject to certain exceptions we shall be discharged from all obligations under the notes and the indenture. Although the indenture permits these transactions, some of the transactions described above could constitute a fundamental change of Rambus and permit each holder to require us to repurchase the notes of such holder as described above under “— Repurchase of Notes at the Option of Holders upon a Fundamental Change.”

 

An assumption by any person of Rambus’ obligations under the notes and the indenture might be deemed for U.S. federal income tax purposes to be an exchange of the notes for new notes by the holders thereof, resulting in recognition of gain or loss for such purposes and possibly other adverse tax consequences to the holders. Holders should consult their own tax advisors regarding the tax consequences of such an assumption.

 

Modification and Waiver

 

Except as described below, we and the trustee may amend or supplement the indenture or the notes with the consent of the holders of at least a majority in aggregate principal amount of the outstanding notes. In addition, subject to certain exceptions, the holders of a majority in aggregate principal amount of the outstanding notes may waive our compliance in any instance with any provision of the indenture without notice to the holders. However, no amendment, supplement or waiver may be made without the consent of the holder of each outstanding note if such amendment, supplement or waiver would:

 

(1) change the stated maturity of the principal of the notes;

 

(2) reduce the rate or extend the time for payment of interest, including any additional interest, if any, on any notes;

 

(3) reduce the principal amount of any notes;

 

(4) reduce any amount payable upon redemption or repurchase of any notes;

 

(5) impair the right of a holder to institute suit for payment of any notes;

 

(6) change the currency in which the principal of or redemption price or repurchase price or rate of interest, including additional interest, if any, with respect to the notes is payable;

 

(7) change our obligation to repurchase any notes at the option of the holder after the occurrence of a fundamental change in a manner adverse to the holders;

 

(8) affect the right of a holder to convert any notes into shares of our common stock or reduce the number of share of our common stock receivable upon conversion pursuant to the terms of the indenture; or

 

(9) subject to specified exceptions, modify certain provisions of the indenture relating to modification of the indenture or waiver under the indenture.

We and the trustee may amend or supplement the indenture or the notes without notice to, or the consent of the holders to, among other things:

 

(1) provide for conversion rights of holders of the notes and our repurchase obligations in connection with a fundamental change, in the event of any reclassification of our common stock, merger or consolidation, or sale, conveyance, transfer or lease of our properties and assets substantially as an entirety;

 

(2) secure the notes;

 

(3) provide for the assumption of our obligations to the holders of the notes in the event of a merger or consolidation, or sale, conveyance, transfer or lease of all or substantially all of our properties and assets;

 

(4) surrender any right or power conferred upon us;

 

(5) add to our covenants for the benefit of the holders of the notes;

 

(6) cure any ambiguity or correct or supplement any inconsistent or otherwise defective provision contained in the indenture, so long as such modification or amendment does not adversely affect the interests of the holders of the notes in any material respect; provided that any such modification or amendment made solely to conform the provisions of the indenture to the description of the notes contained in this prospectus will be deemed not to adversely affect the interests of the holders of the notes;

 

(7) make any provision with respect to matters or questions arising under the indenture that we may deem necessary or desirable and that shall not be inconsistent with provisions of the indenture; provided that such change or modification does not, in the good faith opinion of our board of directors, adversely affect the interests of the holders of the notes in any material respect; provided, further, that any amendment made solely to conform the provisions of the indenture to the description of the notes contained in this prospectus will be deemed not to adversely affect the interests of the holders of the notes;

 

(8) increase the conversion rate;

 

(9) comply with the requirements of the SEC in order to effect or maintain the qualification of the indenture under the Trust Indenture Act;

 

(10) comply with the rules of any applicable securities depositary, including DTC;

 

(11) add guarantees of obligations under the notes; and

 

(12) provide for a successor trustee in accordance with the terms of the indenture or to otherwise comply with any requirement of the indenture.

 

The consent of the holders of notes is not necessary under the indenture to approve the particular form of any proposed modification or amendment. It is sufficient if such consent approves the substance of the proposed modification or amendment. After a modification or amendment under the indenture becomes effective, we are required to mail to the holders a notice briefly describing such modification or amendment. However, the failure to give such notice to all the holders, or any defect in the notice, will not impair or affect the validity of the modification or amendment.

 

Any notes held by us or by any person directly or indirectly controlling or controlled by or under direct or indirect common control with us shall be disregarded (from both the numerator and the denominator) for purposes of determining whether the holders of the requisite aggregate principal amount of the outstanding notes have consented to a modification, amendment or waiver of the terms of the indenture, except that for the purposes of determining whether the trustee shall be protected in relying on any such consent, only notes that the trustee knows are so owned shall be so disregarded.

Satisfaction and Discharge

 

We may satisfy and discharge our obligations under the indenture by delivering to the trustee for cancellation all outstanding notes or by depositing with the paying agent or conversion agent, as the case may be, after the notes have become due and payable, whether at maturity or any redemption date or repurchase date or by delivery of a notice of conversion or otherwise, cash or shares of common stock (as applicable under the terms of the indenture) sufficient to pay all of the outstanding notes and paying all other sums payable under the indenture. Such discharge is subject to terms contained in the indenture.

 

Calculations in Respect of the Notes

 

We or our agents will be responsible for making all calculations called for under the notes. These calculations include, but are not limited to, determination of the trading price of the notes and closing sale price of our common stock, accrued interest payable on the notes, the conversion rate and conversion price and the projected payment schedule. We or our agents will make all these calculations in good faith and, absent manifest error, our and their calculations will be final and binding on holders of notes. We or our agents will provide a schedule of these calculations to the trustee, and the trustee is entitled to conclusively rely upon the accuracy of these calculations without independent verification.

 

Governing Law

 

The indenture and the notes are governed by, and construed in accordance with, the laws of the State of New York.

 

Concerning the Trustee

 

U.S. Bank National Association is the trustee under the indenture. The trustee will be the paying agent, conversion agent and registrar for the notes. The trustee can be contacted at the address set forth below regarding transfer or conversion of the notes:

 

U.S. Bank National Association
633 West Fifth Street, 24^th Floor
LM-CA-T24T
Los Angeles, CA 90071
Attn: Corporate Trust Services
(Rambus 5% Convertible Senior Notes due 2014)

 

If the trustee becomes a creditor of the Company, the indenture limits the right of the trustee to obtain payment of claims in certain cases, or to realize on certain property received in respect of any such claims as security or otherwise. The trustee will be permitted to engage in other transactions; however, if it acquires any conflicting interest it must eliminate such conflict with 90 days, apply to the SEC for permission to continue as trustee (it the indenture has been qualified under the Trust Indenture Act) or resign.

 

The trustee also serves as the trustee under the indenture governing the zero coupon convertible senior notes due 2010.

 

Computershare Investor Services, LLC is the transfer agent and registrar for our common stock.

 

Book-Entry Delivery and Form

 

We will initially issue the notes in the form of one or more global notes. The global note will be deposited with the trustee as custodian for DTC and registered in the name of Cede & Co., as DTC’s nominee. Except as set forth below, the global note may be transferred, in whole and not in part, only to DTC or another nominee of DTC. Holders may hold their beneficial interests in the global note directly through DTC if they have an account with DTC or indirectly through organizations that have accounts with DTC. Notes in

definitive certificated form (called “certificated securities”) will be issued only in certain limited circumstances described below.

 

DTC has advised us that it is:

 

 

DTC was created to hold securities of institutions that have accounts with DTC (called “participants”) and to facilitate the clearance and settlement of securities transactions among its participants in such securities through electronic book-entry changes in accounts of the participants, thereby eliminating the need for physical movement of securities certificates. DTC’s participants include securities brokers and dealers, which may include the underwriters, banks, trust companies, clearing corporations and certain other organizations. Access to DTC’s book-entry system is also available to others such as banks, brokers, dealers and trust companies (called the “indirect participants”) that clear through or maintain a custodial relationship with a participant, whether directly or indirectly.

 

Ownership of beneficial interests in the global note will be limited to participants or persons that may hold interests through participants. Ownership of beneficial interests in the global note will be shown on, and the transfer of those beneficial interests will be effected only through, records maintained by DTC (with respect to participants’ interests), the participants and the indirect participants. The laws of some jurisdictions may require that certain purchasers of securities take physical delivery of such securities in definitive form. These limits and laws may impair the ability to transfer or pledge beneficial interests in the global note.

 

Owners of beneficial interests in global notes who desire to convert their interests into common stock should contact their brokers or other participants or indirect participants through whom they hold such beneficial interests to obtain information on procedures, including proper forms and cut-off times, for submitting requests for conversion.

 

So long as DTC, or its nominee, is the registered owner or holder of a global note, DTC or its nominee, as the case may be, will be considered the sole owner or holder of the notes represented by the global note for all purposes under the indenture and the notes. In addition, no owner of a beneficial interest in a global note will be able to transfer that interest except in accordance with the applicable procedures of DTC. Except as set forth below, as an owner of a beneficial interest in the global note, holders will not be entitled to have the notes represented by the global note registered in their name, will not receive or be entitled to receive physical delivery of certificated securities and will not be considered to be the owner or holder of any notes under the global note. We understand that, under existing industry practice, if an owner of a beneficial interest in the global note desires to take any action that DTC, as the holder of the global note, is entitled to take, DTC would authorize the participants to take such action, and the participants would authorize beneficial owners owning through such participants to take such action or would otherwise act upon the instructions of beneficial owners owning through them.

 

We will make payments of principal of, premium, if any, and any interest (including any additional interest), if any, on the notes represented by the global note registered in the name of and held by DTC or its nominee to DTC or its nominee, as the case may be, as the registered owner and holder of the global note. We expect that DTC or its nominee, upon receipt of any payment of principal of, premium, if any, or interest (including any additional interest), if any, on the global note, will credit participants’ accounts with payments in amounts proportionate to their respective beneficial interests in the principal amount of the global note as shown on the records of DTC or its nominee. We also expect that payments by participants or indirect participants to owners of beneficial interests in the global note held through such participants or indirect participants will be governed by standing instructions and customary practices and will be the responsibility of

such participants or indirect participants. Neither we, the trustee nor any paying agent or conversion agent will have any responsibility or liability for any aspect of the records relating to, or payments made on account of, beneficial interests in the global note for any note or for maintaining, supervising or reviewing any records relating to such beneficial interests or for any other aspect of the relationship between DTC and its participants or indirect participants or the relationship between such participants or indirect participants and the owners of beneficial interests in the global note owning through such participants.

 

Transfers between participants in DTC will be effected in the ordinary way in accordance with DTC rules and will be settled in same-day funds.

 

DTC has advised us that it will take any action permitted to be taken by a holder of notes only at the direction of one or more participants to whose account the DTC interests in the global note is credited, and only in respect of such portion of the aggregate principal amount of notes as to which such participant or participants has or have given such direction. However, if DTC notifies us that it is unwilling to be a depository for the global note or ceases to be a clearing agency and no successor to DTC is appointed within 90 days, DTC will exchange the global note for certificated securities, which it will distribute to its participants. In addition, the owner of a beneficial interest in a global note will be entitled to receive a note in certificated form in exchange for such interest if an event of default has occurred and is continuing.

 

Although DTC is expected to follow the foregoing procedures in order to facilitate transfers of interests in the global note among participants of DTC, it is under no obligation to perform or continue to perform such procedures, and such procedures may be discontinued at any time. Neither we nor the trustee will have any responsibility or liability for the performance by DTC or the participants or indirect participants of their respective obligations under the rules and procedures governing their respective operations.

 

General

 

Our authorized capital stock consists of 500,000,000 shares of common stock, $0.001 par value, and 5,000,000 shares of preferred stock, $0.001 par value, of which 160,000 shares have been designated as Series E Participating Preferred Stock (the “Series E Preferred”).

 

Common Stock

 

As of May 31, 2009, there were 104,730,216 shares of common stock outstanding. Subject to preferences that may be applicable to any preferred stock outstanding at the time, the holders of common stock are entitled to:

 

Dividends.  The holders of common stock are entitled to receive ratably such dividends, if any, as may be declared by the board of directors out of funds legally available for the payment of dividends. There are no redemption or sinking fund provisions applicable to the common stock.

 

Voting.  Our bylaws provide that each stockholder has the right to one vote for each share of common stock registered in the stockholder’s name on each matter submitted to a stockholder vote. Our bylaws specify that, other than the election of directors and except as otherwise provided by our certificate of incorporation or Delaware General Corporation Law, all matters to be voted on by stockholders will be approved by a majority of the quorum then present (in person or by proxy) at a meeting. Unless otherwise provided in our certificate of incorporation and bylaws, directors are elected by a plurality of the votes cast by shares entitled to vote in the election at a meeting at which a quorum is present. Neither our certificate nor bylaws provide for cumulative voting.

 

Preemptive Rights, Conversion and Redemption.  The common stock is not entitled to preemptive rights and is not subject to conversion or redemption.

 

Liquidation, Dissolution and Winding up.  Upon our liquidation, dissolution or winding up, the holders of common stock are entitled to share ratably in all assets remaining after payment of liabilities and the liquidation preferences of any preferred stock.

 

Preferred Stock

 

The board of directors is authorized, without action by the stockholders, to designate and issue up to 4,840,000 shares of preferred stock in one or more series. The board of directors can fix the rights, preferences and privileges of the shares of each Series and any qualifications, limitations or restrictions on these shares.

 

The board of directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the holders of common stock.

 

The issuance of preferred stock could delay, defer or prevent a change in control of us. As of May 31, 2009 there were no shares of preferred stock outstanding and we have no current plans to issue any shares of preferred stock.

 

Anti-takeover Provisions

 

Rights Plan.  We have a preferred shares rights agreement that allows certain holders of our common stock to purchase from us one one-thousandth of a share of Series E Preferred, for each share of common held, at an exercise price of $60.00, subject to adjustment, upon the occurrence of certain events described in the rights agreement (such as a person (or group of people) acquiring 15% or more of our outstanding shares of common stock). Each share of Series E Preferred will be entitled to an aggregate dividend of 1,000 times the dividend declared per share of common stock. In the event of liquidation, the holders of the Series E Preferred will be entitled to 1,000 times the amount paid per share of common stock plus an amount equal to accrued and unpaid dividends and distributions thereon, whether or not declared, to the date of such payment. Each share of Series E Preferred will have 1,000 votes, voting together with the common stock. In addition,

upon exercise of the right a holder has the ability to receive that number of shares of our common stock equal to two times the exercise price. Our rights plan could delay, defer or prevent a change in control of us.

 

Certificate of Incorporation and Bylaws.  Our certificate of incorporation and bylaws provide the following protections:

 

 

The provisions of our certificate of incorporation and bylaws and our preferred shares rights agreement could discourage potential acquisition proposals and could delay or prevent a change in control of us or management.

 

Delaware Takeover Statute.  We are subject to the provisions of Section 203 of the Delaware General Corporation Law. In general, the statute prohibits a publicly held Delaware corporation from engaging in a business combination with an interested stockholder for a period of three years after the date of the transaction in which the person became an interested stockholder, unless the business combination is approved in a prescribed manner. For purposes of Section 203, a business combination includes a merger, asset sale or other transaction resulting in a financial benefit to the interested stockholder, and an interested stockholder is a person who, together with affiliates and associates, owns (or within three years prior, did own) 15% or more of the corporation’s voting stock.

 

Transfer Agent and Registrar

 

The transfer agent and registrar for our common stock is Computershare Investor Services, LLC.

 

NASDAQ Global Select Market Listing

 

Our common stock is quoted on the NASDAQ Global Select Market under the symbol “RMBS.” The notes will not be listed on any securities exchange.

 

This section is a discussion of certain U.S. federal income tax considerations relating to the purchase, ownership and disposition of the notes and the common stock into which the notes may be converted. This summary does not provide a complete analysis of all potential tax considerations. The information provided below is based on existing U.S. federal income tax authorities, all of which are subject to change or differing interpretations, possibly with retroactive effect. There can be no assurances that the Internal Revenue Service (the “IRS”) will not challenge one or more of the tax consequences described herein, and we have not obtained, nor do we intend to obtain, a ruling from the IRS with respect to the U.S. federal income tax consequences of purchasing, owning or disposing of the notes or common stock. The summary generally applies only to beneficial owners of the notes that purchase their notes in this offering for an amount equal to the issue price of the notes, which is the first price at which a substantial amount of the notes is sold for money to the public (not including sales to bond houses, brokers or similar persons or organizations acting in the capacity of underwriters, placement agents or wholesalers), and that hold the notes and common stock as “capital assets” (generally, for investment). This discussion does not purport to deal with all aspects of U.S. federal income taxation that may be relevant to a particular beneficial owner in light of the beneficial owner’s circumstances (for example, persons subject to the alternative minimum tax provisions of the Internal Revenue Code of 1986, as amended (the “Code”), or a U.S. holder (as defined below) whose “functional currency” is not the U.S. dollar). Also, it is not intended to be wholly applicable to all categories of investors, some of which may be subject to special rules (such as dealers in securities, traders in securities that elect to use a mark-to-market method of accounting, banks, thrifts, regulated investment companies, real estate investment trusts, insurance companies, tax-exempt entities, tax-deferred or other retirement accounts, certain former citizens or residents of the United States, persons holding notes or common stock as part of a hedging or conversion transaction or a straddle, or persons deemed to sell notes or common stock under the constructive sale provisions of the Code). Finally, the summary does not describe the effects of the U.S. federal estate and gift tax laws or the effects of any applicable foreign, state or local laws.

 

INVESTORS CONSIDERING THE PURCHASE OF NOTES SHOULD CONSULT THEIR OWN TAX ADVISORS REGARDING THE APPLICATION OF THE U.S. FEDERAL INCOME TAX LAWS TO THEIR PARTICULAR SITUATIONS AND THE CONSEQUENCES OF U.S. FEDERAL ESTATE OR GIFT TAX LAWS, FOREIGN, STATE AND LOCAL LAWS, AND TAX TREATIES.

 

U.S. Holders

 

As used herein, the term “U.S. holder” means a beneficial owner of the notes or the common stock into which the notes may be converted that, for U.S. federal income tax purposes is (1) an individual citizen or resident of the United States, (2) a corporation, or an entity treated as a corporation for U.S. federal income tax purposes, created or organized in or under the laws of the United States or any state of the United States, including the District of Columbia, (3) an estate the income of which is subject to U.S. federal income taxation regardless of its source, or (4) a trust if it (x) is subject to the primary supervision of a U.S. court and the control of one of more U.S. persons or (y) has a valid election in effect under applicable U.S. Treasury regulations to be treated as a U.S. person.

 

A “non-U.S. holder” is a beneficial owner of the notes or the common stock into which the notes may be converted (other than a partnership or an entity or arrangement treated as a partnership for U.S. federal income tax purposes) that is not a U.S. holder.

 

If a partnership (including for this purpose an entity or arrangement, domestic or foreign, treated as a partnership for U.S. federal income tax purposes) is a beneficial owner of a note or common stock acquired upon conversion of a note, the tax treatment of a partner in the partnership will depend upon the status of the partner and the activities of the partnership. A beneficial owner of a note or common stock acquired upon conversion of a note that is a partnership, and partners in such partnership, should consult their own tax advisors about the U.S. federal income tax consequences of purchasing, owning and disposing of the notes and the common stock into which the notes may be converted.

Taxation of Interest

 

U.S. holders will be required to recognize as ordinary income any stated interest paid or accrued on the notes, in accordance with their regular method of tax accounting.

 

In general, if the terms of a debt instrument entitle a holder to receive payments (other than fixed periodic interest) that exceed the issue price of the instrument by more than a de minimis amount, the holder will be required to include such excess in income as “original issue discount” over the term of the instrument, irrespective of the holder’s regular method of tax accounting. We believe that the notes will not be issued with original issue discount for U.S. federal income tax purposes.

 

We may be required to make payments of additional interest to holders of the notes if we do not make certain filings, as described under “Description of the Notes — Events of Default” above. We believe that there is only a remote possibility that we would be required to pay additional interest, or that if such additional interest were required to be paid, it would be an incidental amount, and therefore we do not intend to treat the notes as subject to the special rules governing certain contingent payment debt instruments (which, if applicable, would affect the timing, amount and character of income with respect to a note). Our determination in this regard, while not binding on the IRS, is binding on U.S. holders unless they disclose their contrary position. If, contrary to expectations, we pay additional interest, although it is not free from doubt, such additional interest should be taxable to a U.S. holder as ordinary interest income at the time it accrues or is paid in accordance with the U.S. holder’s regular method of tax accounting. In the event we pay additional interest on the notes, U.S. holders should consult their own tax advisors regarding the treatment of such amounts.

 

Sale, Exchange, Redemption or Other Taxable Disposition of Notes

 

A U.S. holder generally will recognize capital gain or loss if the holder disposes of a note in a sale, exchange, redemption or other taxable disposition (other than conversion of a note into cash and shares of our common stock, the U.S. federal income tax consequences of which are described under “— U.S. Holders — Conversion of Notes” below). The U.S. holder’s gain or loss will equal the difference between the proceeds received by the holder (other than amounts attributable to accrued but unpaid interest) and the holder’s tax basis in the note. The U.S. holder’s tax basis in the note will generally equal the amount the holder paid for the note. The portion of any proceeds that is attributable to accrued interest will not be taken into account in computing the U.S. holder’s capital gain or loss. Instead, that portion will be recognized as ordinary interest income to the extent that the U.S. holder has not previously included the accrued interest in income. The gain or loss recognized by the U.S. holder on the disposition of the note will be long-term capital gain or loss if the holder held the note for more than one year, or short-term capital gain or loss if the holder held the note for one year or less, at the time of the transaction. Long-term capital gains of non-corporate taxpayers currently are taxed at a maximum 15% federal rate. Short-term capital gains are taxed at ordinary income rates. The deductibility of capital losses is subject to limitations.

 

Conversion of Notes

 

The tax consequences of the conversion of a note into cash and shares of our common stock are not entirely clear. A U.S. holder may be treated as exchanging the note for our common stock and cash in a recapitalization for U.S. federal income tax purposes. In such case, the U.S. holder would not be permitted to recognize loss, but would be required to recognize capital gain. The amount of capital gain recognized by a U.S. holder would equal the lesser of (i) the excess (if any) of (A) the amount of cash received (excluding any cash received in lieu of a fractional share of our common stock and any cash received attributable to accrued and unpaid interest) plus the fair market value of our common stock received (treating a fractional share of our common stock as issued and received for this purpose and excluding any such common stock that is attributable to accrued and unpaid interest) upon conversion over (B) the U.S. holder’s tax basis in the converted note, and (ii) the amount of cash received upon conversion (other than any cash received in lieu of a fractional share of our common stock and any cash received attributable to accrued and unpaid interest). Subject to the discussion under “— U.S. Holders — Constructive Distributions” below regarding the possibility

that the adjustment to the conversion rate of a note converted in connection with a fundamental change may be treated as a taxable stock dividend, the gain recognized by a U.S. holder upon conversion of a note will be long-term capital gain if the holder held the note for more than one year, or short-term capital gain if the holder held the note for one year or less, at the time of the conversion. Long-term capital gains of non-corporate taxpayers currently are taxed at a maximum 15% federal rate. Short-term capital gains are taxed at ordinary income rates. The U.S. holder’s tax basis in the common stock received (including any fractional share for which cash is paid, but excluding shares attributable to accrued and unpaid interest) generally would equal the tax basis of the converted note, decreased by the amount of cash received (other than cash in lieu of a fractional share of common stock and any cash attributable to accrued and unpaid interest), and increased by the amount of gain (if any) recognized upon conversion (other than any gain recognized as a result of cash received in lieu of a fractional share of common stock). The U.S. holder’s holding period in the common stock (other than shares attributable to accrued and unpaid interest) would include the holding period in the converted note.

 

Alternatively, the conversion of a note into cash and shares of our common stock may be treated as in part a payment in redemption for cash of a portion of the note and in part a conversion of a portion of the note into common stock. In such case, a U.S. holder’s aggregate tax basis in the note would be allocated between the portion of the note treated as redeemed and the portion of the note treated as converted into common stock on a pro rata basis. The U.S. holder generally would recognize capital gain or loss with respect to the portion of the note treated as redeemed equal to the difference between the amount of cash received by the U.S. holder (other than amounts attributable to accrued and unpaid interest) and the U.S. holder’s tax basis in the portion of the note treated as redeemed. See “— U.S. Holders — Sale, Exchange, Redemption or Other Taxable Disposition of Notes” above. With respect to the portion of the note treated as converted, a U.S. holder generally would not recognize any gain or loss (except with respect to cash received in lieu of a fractional share of common stock and common stock received attributable to accrued and unpaid interest), subject to the discussion under “— U.S. Holders — Constructive Distributions” below regarding the possibility that the adjustment to the conversion rate of a note converted in connection with a fundamental change may be treated as a taxable stock dividend. The tax basis allocated to the portion of the note treated as converted into common stock would be the U.S. holder’s tax basis in the common stock (including any fractional share for which cash is paid, but excluding shares attributable to accrued interest). The U.S. holder’s holding period in the common stock (other than shares attributable to accrued interest) would include the holding period in the converted note.

 

With respect to cash received in lieu of a fractional share of our common stock, a U.S. holder will be treated as if the fractional share were issued and received and then immediately redeemed for cash. Accordingly, the U.S. holder generally will recognize gain or loss equal to the difference between the cash received and that portion of the holder’s tax basis in the common stock (determined as discussed above) attributable to the fractional share.

 

Any cash and the value of any portion of our common stock that is attributable to accrued and unpaid interest on the notes not yet included in income by a U.S. holder will be taxed as ordinary income. The basis in any shares of common stock attributable to accrued and unpaid interest will equal the fair market value of such shares when received. The holding period in any shares of common stock attributable to accrued and unpaid interest will begin on the day after the date of conversion.

 

A U.S. holder that converts a note between a record date for an interest payment and the next interest payment date and consequently receives a payment of cash interest, as described in “Description of the Notes — Conversion of Notes — General”, should consult its own tax advisor concerning the appropriate treatment of such payment.

 

U.S. holders are urged to consult their own tax advisors with respect to the U.S. federal income tax consequences of converting their notes into cash or a combination of cash and our common stock.

 

If we undergo a business combination as described under “Description of the Notes — Conversion of Notes — Conversion Rate Adjustments — Treatment of Reference Property”, the conversion obligation may be adjusted so that holders would be entitled to convert the notes into the type of consideration that they would

have been entitled to receive upon such business combination had the notes been converted into our common stock immediately prior to such business combination, except that such holders will not be entitled to receive a make whole premium unless such notes are converted in connection with the relevant fundamental change. Depending on the facts and circumstances at the time of such business combination, such adjustment may result in a deemed exchange of the outstanding notes, which may be a taxable event for U.S. federal income tax purposes.

 

U.S. holders are urged to consult their own tax advisors regarding the U.S. federal income tax consequences of such an adjustment upon a business combination.

 

Distributions

 

If, after a U.S. holder acquires our common stock upon a conversion of a note, we make a distribution in respect of such common stock from our current or accumulated earnings and profits (as determined under U.S. federal income tax principles), the distribution will be treated as a dividend and will be includible in a U.S. holder’s income when paid. If the distribution exceeds our current and accumulated earnings and profits, the excess will be treated first as a tax-free return of the U.S. holder’s investment, up to the U.S. holder’s tax basis in its common stock, and any remaining excess will be treated as capital gain from the sale or exchange of the common stock. If the U.S. holder is a U.S. corporation, it would generally be able to claim a dividends received deduction on a portion of any distribution taxed as a dividend, provided that certain holding period requirements are satisfied. Subject to certain exceptions, dividends received by non-corporate U.S. holders currently are taxed at a maximum rate of 15%, provided that certain holding period requirements are met.

 

Constructive Distributions

 

The terms of the notes allow for changes in the conversion rate of the notes under certain circumstances. A change in conversion rate that allows holders of notes to receive more shares of common stock on conversion may increase such holders’ proportionate interests in our earnings and profits or assets. In that case, the holders of notes may be treated as though they received a taxable distribution in the form of our common stock. A taxable constructive stock distribution would result, for example, if the conversion rate is adjusted to compensate holders of notes for distributions of cash or property to our stockholders. The adjustment to the conversion rate of notes converted in connection with a non-stock change of control, as described under “Description of the Notes — Conversion of Notes — Adjustment to Conversion Rate upon Certain Fundamental Changes” above, also may be treated as a taxable stock distribution. If an event occurs that dilutes the interests of stockholders and the conversion rate of the notes is not adjusted (or not adequately adjusted), this also could be treated as a taxable stock distribution to holders of the notes. Conversely, if an event occurs that dilutes the interests of holders of the notes and the conversion rate is not adjusted (or not adequately adjusted), the resulting increase in the proportionate interests of our stockholders could be treated as a taxable stock distribution to the stockholders. Not all changes in the conversion rate that result in holders of notes receiving more common stock on conversion, however, increase such holders’ proportionate interests in us. For instance, a change in conversion rate could simply prevent the dilution of the holders’ interests upon a stock split or other change in capital structure. Changes of this type, if made pursuant to a bona fide reasonable adjustment formula, are not treated as constructive stock distributions. Any taxable constructive stock distribution resulting from a change to, or failure to change, the conversion rate that is treated as a distribution of common stock would be treated for U.S. federal income tax purposes in the same manner as a distribution on our common stock paid in cash or other property. It would result in a taxable dividend to the recipient to the extent of our current or accumulated earnings and profits (with the recipient’s tax basis in its note or common stock (as the case may be) being increased by the amount of such dividend), with any excess treated as a tax-free return of the holder’s investment in its note or common stock (as the case may be) or as capital gain. U.S. holders should consult their own tax advisors regarding whether any taxable constructive stock dividend on notes would be eligible for the current maximum 15% rate or the dividends received deduction described in the previous paragraph, as the requisite applicable holding period requirements might not be considered to be satisfied.

Sale, Exchange or Other Disposition of Common Stock

 

A U.S. holder generally will recognize capital gain or loss on a sale, exchange or other disposition of common stock. The U.S. holder’s gain or loss will equal the difference between the proceeds received by the holder and the holder’s tax basis in the stock. The proceeds received by the U.S. holder will include the amount of any cash and the fair market value of any other property received for the stock. The gain or loss recognized by a U.S. holder on a sale or exchange of common stock will be long-term capital gain or loss if the holder’s holding period in the common stock is more than one year, or short-term capital gain or loss if the holder’s holding period in the common stock is one year or less, at the time of the transaction. Long-term capital gains of non-corporate taxpayers are currently taxed at a maximum 15% federal rate. Short-term capital gains are taxed at ordinary income rates. The deductibility of capital losses is subject to limitations.

 

Non-U.S. Holders

 

The following discussion is limited to the U.S. federal income tax consequences relevant to a non-U.S. holder (as defined above).

 

Taxation of Interest

 

Payments of interest to nonresident persons or entities are generally subject to U.S. federal income tax at a rate of 30% (or a reduced or zero rate under the terms of an applicable income tax treaty between the United States and the recipient’s country of residence), collected by means of withholding by the payor. Payments of interest on the notes to most non-U.S. holders, however, will qualify as “portfolio interest,” and thus will be exempt from U.S. federal income tax, including withholding of such tax, if the non-U.S. holders certify their nonresident status as described below.

 

The portfolio interest exemption will not apply to payments of interest to a non-U.S. holder that:

 

 

In general, a foreign corporation is a controlled foreign corporation if more than 50% of its stock is owned, actually or constructively, by one or more U.S. persons that each owns, actually or constructively, at least 10% of the corporation’s voting stock.

 

The portfolio interest exemption, reduction of the withholding rate pursuant to the terms of applicable income tax treaty and several of the special rules for non-U.S. holders described below apply only if the holder certifies its nonresident status. A non-U.S. holder can meet this certification requirement by providing a properly executed IRS Form W-8BEN or appropriate substitute form to us or our paying agent prior to the payment. If the non-U.S. holder holds the note through a financial institution or other agent acting on the holder’s behalf, the holder will be required to provide appropriate documentation to the agent. The non-U.S. holder’s agent will then be required to provide certification to us or our paying agent, either directly or through other intermediaries.

 

Sale, Exchange, Redemption, Conversion or Other Disposition of Notes or Common Stock

 

Non-U.S. holders generally will not be subject to U.S. federal income or withholding tax on any gain realized on the sale, exchange, redemption, conversion or other disposition of notes or common stock (other

than with respect to payments attributable to accrued interest, which will be taxed as described under “— Non-U.S. Holders — Taxation of Interest” above), unless:

 

 

The FIRPTA rules may apply to a sale, exchange, redemption or other disposition of notes or common stock by a non-U.S. holder if we currently are, or were at any time within five years before the sale, exchange, redemption, conversion or other disposition (or, if shorter, the non-U.S. holder’s holding period for the notes or common stock disposed of), a “U.S. real property holding corporation” (or “USRPHC”). In general, we would be a USRPHC if interests in U.S. real estate comprised at least 50% of our assets. We believe that we currently are not, and will not become in the future, a USRPHC.

 

Dividends

 

Dividends paid to a non-U.S. holder on common stock received on conversion of a note, including any taxable constructive stock dividends resulting from certain adjustments (or failures to make adjustments) to the number of shares of common stock to be issued on conversion (as described under “— U.S. Holders — Constructive Distributions” above) generally will be subject to U.S. withholding tax at a 30% rate. Withholding tax applicable to any taxable constructive stock dividends received by a non-U.S. holder may be withheld from interest on the notes, distributions on the common stock, shares of common stock or proceeds subsequently paid or credited to the non-U.S. holder. The withholding tax on dividends (including any taxable constructive stock dividends), however, may be reduced under the terms of an applicable income tax treaty between the United States and the non-U.S. holder’s country of residence. A non-U.S. holder should demonstrate its eligibility for a reduced rate of withholding under an applicable income tax treaty by timely delivering a properly executed IRS Form W-8BEN or appropriate substitute form. A non-U.S. holder that is eligible for a reduced rate of withholding under the terms of an applicable income tax treaty may obtain a refund of any excess amounts withheld by timely filing an appropriate claim for refund with the IRS. Dividends on the common stock that are effectively connected with a non-U.S. holder’s conduct of a U.S. trade or business are discussed below under “— Non-U.S. Holders — Income or Gains Effectively Connected with a U.S. Trade or Business”.

 

Income or Gains Effectively Connected With a U.S. Trade or Business

 

The preceding discussion of the U.S. federal income and withholding tax considerations of the purchase, ownership or disposition of notes or common stock by a non-U.S. holder assumes that the holder is not engaged in a U.S. trade or business. If any interest on the notes, dividends on common stock, or gain from the sale, exchange, redemption, conversion or other disposition of the notes or common stock is effectively connected with a U.S. trade or business conducted by the non-U.S. holder, then the income or gain will be subject to U.S. federal income tax on a net income basis at the regular graduated rates and in the same manner applicable to U.S. holders. If the non-U.S. holder is eligible for the benefits of a tax treaty between the United States and the holder’s country of residence, any “effectively connected” income or gain generally will be subject to U.S. federal income tax only if it is also attributable to a permanent establishment or fixed base maintained by the holder in the United States. Payments of interest or dividends that are effectively connected

with a U.S. trade or business (and, if a tax treaty applies, attributable to a permanent establishment or fixed base), and therefore included in the gross income of a non-U.S. holder, will not be subject to 30% withholding, provided that the holder claims exemption from withholding by timely filing a properly executed IRS Form W-8ECI or appropriate substitute form. If the non-U.S. holder is a corporation (or an entity treated as a corporation for U.S. federal income tax purposes), that portion of its earnings and profits that is effectively connected with its U.S. trade or business generally also would be subject to a “branch profits tax.” The branch profits tax rate is generally 30%, although an applicable income tax treaty might provide for a lower rate.

 

Backup Withholding and Information Reporting

 

The Code and the Treasury regulations require those who make specified payments to report the payments to the IRS. Among the specified payments are interest, dividends, and proceeds paid by brokers to their customers. This reporting regime is reinforced by “backup withholding” rules, which require the payor to withhold from payments subject to information reporting if the recipient has failed to provide a taxpayer identification number to the payor, furnished an incorrect identification number, or repeatedly failed to report interest or dividends on tax returns. The backup withholding rate is currently 28%.

 

Payments of interest or dividends to U.S. holders of notes or common stock generally will be subject to information reporting, and will be subject to backup withholding, unless the holder (1) is an exempt payee, such as a corporation, or (2) provides the payor with a correct taxpayer identification number and complies with applicable certification requirements. Payments made to U.S. holders by a broker upon a sale of notes or common stock will generally be subject to information reporting and backup withholding. If the sale is made through a foreign office of a foreign broker, however, the sale will generally not be subject to either information reporting or backup withholding. This exception may not apply if the foreign broker is owned or controlled by U.S. persons, or is engaged in a U.S. trade or business.

 

We must report annually to the IRS the interest and/or dividends paid to each non-U.S. holder and the tax withheld, if any, with respect to such interest and/or dividends, including any tax withheld pursuant to the rules described under “— Non-U.S. Holders — Taxation of Interest” and “— Non-U.S. Holders — Dividends” above. Copies of these reports may be made available to tax authorities in the country where the non-U.S. holder resides. Payments to non-U.S. holders of dividends on our common stock or interest on the notes may be subject to backup withholding unless the non-U.S. holder certifies its non-U.S. status on a properly executed IRS Form W-8BEN or appropriate substitute form. Payments made to non-U.S. holders by a broker upon a sale of the notes or our common stock will not be subject to information reporting or backup withholding as long as the non-U.S. holder certifies its non-U.S. status or otherwise establishes an exemption.

 

Any amounts withheld from a payment to a U.S. holder or non-U.S. holder of notes or common stock under the backup withholding rules generally can be credited against any U.S. federal income tax liability of the holder, provided the required information is timely furnished to the IRS.

 

Under the terms and subject to the conditions contained in an underwriting agreement dated June 23, 2009, we have agreed to sell to Credit Suisse Securities (USA) LLC and J.P. Morgan Securities Inc., who are referred to in this prospectus as “underwriters” and who are acting as joint book-running managers, the following respective principal amounts of the notes:

 

 

The underwriting agreement provides that the underwriters are obligated to purchase all of the notes if any are purchased, other than those covered by the over-allotment option described below. The obligations of the underwriters to purchase the notes depend on the satisfaction of certain conditions contained in the underwriting agreement. The underwriting agreement also provides that if an underwriter defaults, the purchase commitments of non-defaulting underwriters may be increased or the offering of notes may be terminated.

 

We have granted to the underwriters a 12-day option to purchase on a pro rata basis up to an additional $22,500,000 principal amount of notes at the initial public offering price less the underwriting discounts and commissions. The option may be exercised only to cover any over-allotments in the sale of the notes.

 

The underwriters propose to offer the notes initially at the public offering price on the cover page of this prospectus. After the initial public offering, the underwriters may change the public offering price.

 

The following table summarizes the compensation and estimated expenses that we will pay.

 

 

The notes are a new issue of securities with no established trading market. One or more of the underwriters intends to make a secondary market for the notes; however, they are not obligated to do so and may discontinue making a secondary market for the notes at any time without notice. No assurance can be given as to how liquid the trading market for the notes will be.

 

We have agreed that we will not offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, or file with the SEC a registration statement under the Securities Act relating to, any U.S. dollar-denominated debt securities issued or guaranteed by the Company and having a maturity of more than one year from the date of issue, or any shares of common stock or securities convertible into or exchangeable or exercisable for any shares of our common stock, including notes or warrants or other rights to purchase shares of common stock, or publicly disclose our intention to make any offer, sale, pledge, disposition or filing, without the prior written consent of the underwriters for a period of 60 days after the date of this prospectus; provided that such restriction shall not apply to: (i) the notes; (ii) shares of our common stock issued upon conversion of the notes or upon the exercise or conversion of options, warrants or convertible securities, in each case outstanding on the date of the underwriting agreement; (iii) employee stock options granted and shares of common stock issued under plans existing on the date of the underwriting agreement; (iv) the filing of any registration statement on Form S-8 to register shares of common stock reserved for issuance under our equity compensation plans; (v) the issuance of shares of common stock which we may issue or agree to issue in connection with the acquisition of one or more businesses, products or technologies (whether by means of merger, stock purchase or asset purchase); provided that we will not issue or agree to issue any shares of common stock in connection with such an acquisition during the 30 days after the date of the underwriting agreement; provided, further, that the aggregate number of shares of common stock that we may issue or agree

to issue in connection with such an acquisition during the period from the 31st to the 60th day after the date of this prospectus may not exceed 1,000,000 shares or (vi) any existing obligations as may be required by the Amended and Restated Information and Registration Rights Agreement, dated January 7, 1997, between us and the parties indicated therein or the Registration Rights Agreement dated February 1, 2005, among us, Credit Suisse First Boston LLC and Deutsche Bank Securities Inc.

 

Our executive officers and directors have agreed that they will not offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any shares of our common stock or securities convertible into or exchangeable or exercisable for any shares of our common stock, enter into a transaction which would have the same effect, or enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences of ownership of our common stock, whether any of these transactions are to be settled by delivery of our common stock or such other securities, in cash or otherwise, or publicly disclose the intention to make any offer, sale, pledge, or disposition, or to enter into any transaction, swap, hedge or other arrangement, or make any demand for or exercise any right with respect to, the registration of any of our common stock or any security convertible into or exercisable or exchangeable for our common stock, without, in each case, the prior written consent of the representatives. Any of our common stock received by any of our executive officers and directors upon exercise of options or vesting of restricted stock units granted to such executive officer or director also will be subject to the foregoing agreement; provided that, notwithstanding the foregoing, from the 31st day through the 60th day following the date of this prospectus, each executive officer and director, individually, may (1) together with all other executive officers and directors subject to such an agreement, offer, sell or otherwise dispose of up to an aggregate of 50,000 shares of our common stock issued upon the exercise of options that will expire prior to December 31, 2009, (2) together with all other executive officers and directors subject to such an agreement, offer, sell or otherwise dispose of up to an aggregate of 125,000 shares of our common stock that is issued upon the vesting of restricted stock units during the 60-day period following the date of this prospectus and (3) offer, sell or otherwise dispose of shares of our common stock to us upon a vesting event to pay required withholding taxes. Offers, sales or other dispositions of our common stock pursuant to a written plan (a “plan”) for trading securities in effect on the date hereof will not be subject to the foregoing agreement if such plan was established pursuant to and in accordance with Rule 10b5-1(c) under the Exchange Act and is not amended or modified during the 60-day period following the date of this prospectus. A transfer of our common stock as a bona fide gift or to a family member or trust may be made, provided the donee or transferee, as applicable, agrees to be bound in writing by the terms of the foregoing agreement prior to such transfer and no filing by any party (donor, donee, transferor or transferee) under the Exchange Act shall be required or shall be voluntarily made in connection with such transfer (other than a filing on a Form 5 made after the 60th day following the date of this prospectus). A transfer of our common stock by will or intestate succession to the immediate family of one of the company’s executive officers or directors shall not be subject to the foregoing agreement.

 

We have agreed to indemnify the several underwriters against liabilities under the Securities Act, or contribute to payments which the underwriters may be required to make in that respect.

 

The underwriters and their affiliates have from time to time performed and may in the future perform various financial advisory, commercial banking and investment banking services for us in the ordinary course of business, for which they received or will receive customary fees.

 

In connection with the offering, the underwriters may engage in stabilizing transactions, over-allotment transactions, syndicate covering transactions and passive market making in accordance with Regulation M under the Exchange Act, including:

 

 

 

These stabilizing transactions, syndicate covering transactions and penalty bids may have the effect of raising or maintaining the market price of the notes or preventing or retarding a decline in the market price of the notes. As a result the price of the notes may be higher than the price that might otherwise exist in the open market. These transactions, if commenced, may be discontinued at any time.

 

Prior to purchasing the notes being offered pursuant to this prospectus, on June 23, 2009, one of the underwriters purchased, on behalf of the syndicate, 90,942 shares our common stock at an average price of $14.85 per share in stabilizing transactions.

 

A prospectus in electronic format may be made available on the web sites maintained by one or more of the underwriters participating in this offering and one or more of the underwriters participating in this offering may distribute prospectuses electronically. The underwriters may agree to allocate securities to underwriters for sale to their online brokerage account holders. Internet distributions will be allocated by the underwriters that will make internet distributions on the same basis as other allocations.

 

European Economic Area

 

In relation to each Member State of the European Economic Area which has implemented the Prospectus Directive (each, a “Relevant Member State”), each Underwriter represents and agrees that with effect from and including the date on which the Prospectus Directive is implemented in that Relevant Member State (the “Relevant Implementation Date”) it has not made and will not make an offer of the notes which are the subject of the offering contemplated by this prospectus to the public in that Relevant Member State other than:

 

(a) to legal entities which are authorized or regulated to operate in the financial markets or, if not so authorized or regulated, whose corporate purpose is solely to invest in securities;

 

(b) to any legal entity which has two or more of (1) an average of at least 250 employees during the last financial year; (2) a total balance sheet of more than €43,000,000 and (3) an annual net turnover of more than €50,000,000, as shown in its last annual or consolidated accounts;

 

(c) to fewer than 100 natural or legal persons (other than qualified investors as defined in the Prospectus Directive) subject to obtaining the prior consent of the manager for any such offer; or

 

(d) in any other circumstances which do not require the publication by the Issuer of a prospectus pursuant to Article 3 of the Prospectus Directive.

 

For the purposes of this provision, the expression an “offer of notes to the public” in relation to any notes in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and the notes to be offered so as to enable an investor to decide to purchase or subscribe the notes, as the same may be varied in that Member State by any measure implementing the Prospectus Directive in that Member State and the expression “Prospectus Directive” means Directive 2003/71/EC and includes any relevant implementing measure in each Relevant Member State.

 

Notice to Investors in the United Kingdom

 

Each of the underwriters severally represents, warrants and agrees as follows:

 

(a) it has only communicated or caused to be communicated and will only communicate or cause to be communicated an invitation or inducement to engage in investment activity (within the meaning of section 21 of FSMA) to persons who have professional experience in matters relating to investments falling with Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 or in circumstances in which section 21 of FSMA does not apply to the company; and

 

(b) it has complied with, and will comply with all applicable provisions of FSMA with respect to anything done by it in relation to the notes in, from or otherwise involving the United Kingdom.

 

Resale Restrictions

 

The distribution of notes in Canada is being made only on a private placement basis exempt from the requirement that we prepare and file a prospectus with the securities regulatory authorities in each province where trades of the notes are made. Any resale of the notes in Canada must be made under applicable securities laws which will vary depending on the relevant jurisdiction, and which may require resales to be made under available statutory exemptions or under a discretionary exemption granted by the applicable Canadian securities regulatory authority. Purchasers are advised to seek legal advice prior to any resale of the notes.

 

Representations of Purchasers

 

By purchasing notes in Canada and accepting a purchase confirmation, a purchaser is representing to us and the dealer from whom the purchase confirmation is received that:

 

 

Further details concerning the legal authority for this information is available on request.

 

Rights of Action — Ontario Purchasers Only

 

Under Ontario securities legislation, certain purchasers who purchase a security offered by this prospectus during the period of distribution will have a statutory right of action for damages, or while still the owner of the notes, for rescission against us in the event that this prospectus supplement contains a misrepresentation without regard to whether the purchaser relied on the misrepresentation. The right of action for damages is exercisable not later than the earlier of 180 days from the date the purchaser first had knowledge of the facts giving rise to the cause of action and three years from the date on which payment is made for the notes. The right of action for rescission is exercisable not later than 180 days from the date on which payment is made for the notes. If a purchaser elects to exercise the right of action for rescission, the purchaser will have no right of action for damages against us. In no case will the amount recoverable in any action exceed the price at which the notes were offered to the purchaser and if the purchaser is shown to have purchased the securities with knowledge of the misrepresentation, we will have no liability. In the case of an action for damages, we will not be liable for all or any portion of the damages that are proven to not represent the depreciation in value of the notes as a result of the misrepresentation relied upon. These rights are in addition to, and without derogation from, any other rights or remedies available at law to an Ontario purchaser. The foregoing is a summary of the rights available to an Ontario purchaser. Ontario purchasers should refer to the complete text of the relevant statutory provisions.

 

Enforcement of Legal Rights

 

All of our directors and officers as well as the experts named herein may be located outside of Canada and, as a result, it may not be possible for Canadian purchasers to effect service of process within Canada upon us or those persons. All or a substantial portion of our assets and the assets of those persons may be located outside of Canada and, as a result, it may not be possible to satisfy a judgment against us or those persons in Canada or to enforce a judgment obtained in Canadian courts against us or those persons outside of Canada.

 

Taxation and Eligibility for Investment

 

Canadian purchasers of notes should consult their own legal and tax advisors with respect to the tax consequences of an investment in the notes in their particular circumstances and about the eligibility of the notes for investment by the purchaser under relevant Canadian legislation.

 

The validity of the issuance of the notes offered hereby will be passed upon for us by the law firm of Wilson Sonsini Goodrich & Rosati, Professional Corporation, Palo Alto, California. The underwriters are represented by Davis Polk & Wardwell LLP, Menlo Park, California.

 

The financial statements incorporated in this prospectus by reference to Rambus Inc.’s Current Report on Form 8-K dated June 22, 2009 and management’s assessment of the effectiveness of internal control over financial reporting (which is included in Management’s Report on Internal Control over Financial Reporting) incorporated in this prospectus by reference to the Annual Report on Form 10-K of Rambus Inc. for the year ended December 31, 2008 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.