MASSMUTUAL CORPORATE INVESTORS Report for the Nine Months Ended September 30, 2006 [LOGO] ADVISER Babson Capital Management LLC 1500 Main Street Springfield, Massachusetts 01115 INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM KPMG LLP Boston, Massachusetts 02110 COUNSEL TO THE TRUST Ropes & Gray LLP Boston, Massachusetts 02110 CUSTODIAN Citibank, N.A. New York, New York 10043 TRANSFER AGENT & REGISTRAR Shareholder Financial Services, Inc. P.O. Box 173673 Denver, Colorado 80217-3673 1-800-647-7374 Internet Website: www.babsoncapital.com/mci [LOGO] MassMutual Corporate Investors c/o Babson Capital Management LLC 1500 Main Street, Suite 600 Springfield, Massachusetts 01115 (413) 226-1516 -------------------------------------------------------------------------------- INVESTMENT OBJECTIVE AND POLICY MassMutual Corporate Investors (the "Trust") is a closed-end management investment company, first offered to the public in 1971, whose shares are traded on the New York Stock Exchange under the trading symbol "MCI". The Trust's share price can be found in the financial section of most newspapers as "MassCp" or "MassMuInv" under the New York Stock Exchange listings. The Trust's investment objective is to maintain a portfolio of securities providing a fixed yield while providing an opportunity for capital gains. The Trust's principal investments are privately placed, below investment grade, long-term corporate debt obligations with equity features such as warrants, conversion rights, or other equity features and, occasionally, preferred stocks. The Trust typically purchases these investments, which are not publicly tradable, directly from their issuers, which tend to be smaller companies. In addition, the Trust may temporarily invest, subject to certain limitations, in marketable investment grade debt securities, other marketable debt securities (including high yield securities) and marketable common stocks. Babson Capital Management LLC ("Babson Capital") manages the Trust on a total return basis. The Trust distributes substantially all of its net income to shareholders each year. Accordingly, the Trust pays dividends to shareholders quarterly in January, May, August, and November. The Trust pays dividends to its shareholders in cash, unless the shareholder elects to participate in the Dividend Reinvestment and Share Purchase Plan. FORM N-Q The Trust files its complete schedule of portfolio holdings with the U.S. Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. This information is available (i) on the SEC's website at http://www.sec.gov; and (ii) at the SEC's Public Reference Room in Washington, DC (which information on their operation may be obtained by calling 1-800-SEC-0330). A complete schedule of portfolio holdings as of each quarter-end is available upon request by calling, toll-free, 866-399-1516. PROXY VOTING POLICIES & Procedures; PROXY VOTING RECORD The Trustees of the Trust have delegated proxy voting responsibilities relating to the voting of securities held by the Trust to Babson Capital. A description of Babson Capital's proxy voting policies and procedures is available (1) without charge, upon request, by calling, toll-free 866-399-1516; (2) on the Trust's website: http://www.babsoncapital.com/mci; and (3) on the SEC's website: http://www.sec.gov. Information regarding how the Trust voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available (1) on the Trust's website: http://www.babsoncapital.com/mci; and (2) on the SEC's website: http://www.sec.gov. MCI Listed NYSE TO OUR SHAREHOLDERS October 31, 2006 We are pleased to present the September 30, 2006 Quarterly Report of MassMutual Corporate Investors ("the Trust"). The Trust's Board of Trustees declared a quarterly dividend of 50 cents per share, payable on November 14, 2006, to shareholders of record on October 30, 2006. A dividend of 50 cents per share was paid in the previous quarter. U.S. equity markets, as measured by several broad market indices, increased during the quarter ended September 30, 2006. Large stocks, as approximated by the Dow Jones Industrial Average, increased 5.37%, while smaller stocks, as approximated by the Russell 2000 Index, increased 0.44%. For the nine months ended September 30, 2006, returns were 7.73% and 8.69%, respectively. U.S. fixed income markets, as measured by selected indices, posted increased returns during the quarter. The Lehman Brothers Government/Credit Index and the Lehman Brothers U.S. Corporate High Yield Index increased 3.91% and 4.07%, respectively, for the quarter. For the nine months ended September 30, 2006, returns were 2.71% and 7.34%, respectively. For the quarter ended September 30, 2006, the Trust earned 55 cents per share. The Trust earned 53 cents per share in the previous quarter this year. The Trust's net assets as of September 30, 2006 totaled $262,784,338 or $28.77 per share compared to $257,216,961 or $28.21 per share on June 30, 2006. This translated into a portfolio return of 3.80% for the quarter and 14.36% for the nine months ended September 30, 2006 based on the change in the Trust's net assets assuming the reinvestment of all dividends. Long term, the Trust's portfolio had average annualized returns of 21.74%, 17.41%, 15.05%, and 15.83% for the 1-, 5-, 10-, and 25-year periods ended September 30, 2006, respectively, based on the change in net assets assuming reinvestment of all dividends. During the quarter, the Trust made private placement investments in four new issuers and closed two "follow on" investments, totaling approximately $8.9 million. The follow on investments purchased by the Trust were in MicroGroup, Inc. and Terra Renewal Services, Inc. The four issuers added to the portfolio were Momentum Holding Co., Morton Industrial Group, Inc., P A S Holdco LLC, and Stanton Carpet Holding Co. The weighted average coupon of these investments was 12.38%. (A brief description of these investments can be found in the Consolidated Schedule of Investments.) Finally, the Trust is sad to report the passing of our good friend and colleague Jack Laughery. Jack had loyally served the Trust and its shareholders as a trustee for over 10 years. His contributions and wit will be missed. Thank you for your continued interest in and support of MassMutual Corporate Investors. Sincerely, /s/ Clifford M. Noreen -------------------------- Clifford M. Noreen President -------------------------------------------------------------------------------- [PIE CHART APPEARS HERE] Portfolio Composition as of 09/30/06* Cash & Short Term Investments 5.2% Public High Yield Debt 27.4% Public Equity 1.0% Private High Yield Debt 46.0% Private Investment Grade Debt 5.9% Private/Restricted Equity 14.5% *Based on market value of total investments -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- 1 CONSOLIDATED STATEMENT OF MASSMUTUAL CORPORATE INVESTORS ASSETS AND LIABILITIES September 30, 2006 (Unaudited) ASSETS: INVESTMENTS (See Consolidated Schedule of Investments) Corporate restricted securities at fair value (Cost - $185,334,622) $ 184,407,630 Corporate public securities at market value (Cost - $78,077,986) 78,990,123 Short-term securities at amortized cost 6,038,665 ------------- 269,436,418 Cash 8,479,029 Interest and dividends receivable 5,552,305 Receivable for investments sold 1,538,511 Other assets 6,684 ------------- TOTAL ASSETS $ 285,012,947 Liabilities: Payable for investments purchased $ 614,286 Investment advisory fee payable 821,201 Note payable 20,000,000 Interest payable 188,856 Accrued expenses 206,301 Accrued taxes payable 397,965 ------------- TOTAL LIABILITIES 22,228,609 ------------- TOTAL NET ASSETS $ 262,784,338 ============= Net Assets: Common shares, par value $1.00 per share; an unlimited number authorized $ 9,134,359 Additional paid-in capital 107,733,854 Retained net realized gain on investments, prior years 115,317,244 Undistributed net investment income 7,817,006 Accumulated net realized gain on investments 22,979,352 Net unrealized depreciation of investments (197,477) ------------- TOTAL NET ASSETS $ 262,784,338 ============= COMMON SHARES ISSUED AND OUTSTANDING 9,134,359 ============= NET ASSET VALUE PER SHARE $ 28.77 ============= See Notes to Consolidated Financial Statements. -------------------------------------------------------------------------------- 2 CONSOLIDATED STATEMENT OF OPERATIONS MASSMUTUAL CORPORATE INVESTORS For the nine months ended September 30, 2006 (Unaudited) Investment Income: Interest $ 17,762,483 Dividends 1,032,748 ------------- TOTAL INVESTMENT INCOME 18,795,231 Expenses: Investment advisory fees 2,406,115 Interest 1,137,693 Trustees' fees and expenses 142,500 Professional fees 86,500 Reports to shareholders 83,000 Transfer agent/registrar's expenses 23,000 Other 21,302 ------------- TOTAL EXPENSES 3,900,110 ------------- INVESTMENT INCOME NET 14,895,121 ------------- Net realized and unrealized gain (loss) on investments: Net realized gain on investments before taxes 22,076,547 Income tax expense (350,255) Net realized gain on investments 21,726,292 Net change in unrealized appreciation of investments (3,367,907) Net change in deferred income tax expense 92,949 ------------- Net change in unrealized appreciation of investments (3,274,958) NET GAIN ON INVESTMENTS 18,451,334 ------------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 33,346,455 ============= See Notes to Consolidated Financial Statements. -------------------------------------------------------------------------------- 3 CONSOLIDATED STATEMENT OF CASH FLOWS MASSMUTUAL CORPORATE INVESTORS For the nine months ended September 30, 2006 (Unaudited) Net increase in cash: Cash flows from operating activities: Interest and dividends received $ 17,250,960 Interest expense paid (1,136,548) Operating expenses paid (2,605,011) Income taxes paid (7,431,807) ------------- NET CASH PROVIDED BY OPERATING ACTIVITIES 6,077,594 ------------- Cash flows from investing activities: Purchases/Proceeds/Maturities from short-term portfolio securities, net 18,496,146 Purchase of portfolio securities (73,089,020) Proceeds from disposition of portfolio securities 66,619,501 ------------- NET CASH PROVIDED BY INVESTING ACTIVITIES 12,026,627 ------------- NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES 18,104,221 ------------- Cash flows from financing activities: Cash dividends paid from net investment income (17,175,666) Receipts for shares issued on reinvestment of dividends 2,089,024 ------------- NET CASH USED FOR FINANCING ACTIVITIES (15,086,642) ------------- NET INCREASE IN CASH 3,017,579 Cash - beginning of year 5,461,450 ------------- Cash - end of period $ 8,479,029 ============= RECONCILIATION OF NET INCREASE IN NET ASSETS TO NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES: NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 33,346,455 ------------- Increase in investments (7,689,575) Increase in interest and dividends receivable (529,589) Increase in receivable for investments sold (621,406) Decrease in other assets 42,491 Increase in payable for investments purchased 614,286 Increase in investment advisory fee payable 82,840 Increase in interest payable 1,145 Increase in accrued expenses 32,075 Decrease in accrued taxes payable (7,174,501) ------------- TOTAL ADJUSTMENTS TO NET ASSETS FROM OPERATIONS (15,242,234) ------------- NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES $ 18,104,221 ============= See Notes to Consolidated Financial Statements. -------------------------------------------------------------------------------- 4 CONSOLIDATED STATEMENTS OF MASSMUTUAL CORPORATE INVESTORS CHANGES IN NET ASSETS For the nine months ended For the 09/30/2006 year ended (Unaudited) 12/31/2005 ------------- ------------- Increase in net assets: Operations: Investment income - net $ 14,895,121 $ 18,371,097 Net realized gain on investments 21,726,292 15,531,627 Net change in unrealized appreciation of investments (3,274,958) 2,199,515 ------------- ------------- Net increase in net assets resulting from operations 33,346,455 36,102,239 Net increase from common shares issued on reinvestment of dividends Common shares issued (2006 - 69,406; 2005 - 86,526) 2,089,024 2,375,977 Dividends to shareholders from: Net investment income (2006 - $0.98 per share; 2005 - $2.11 per share) (8,926,559) (19,033,162) Net realized gains on investments (2005 $0.18 per share) -- (1,674,784) ------------- ------------- Total increase in net assets 26,508,920 17,770,270 Net assets, beginning of year 236,275,418 218,505,148 ------------- ------------- Net assets, end of period/year (including undistributed net investment income of $7,817,006 and $1,848,444, respectively) $ 262,784,338 $ 236,275,418 ============= ============= See Notes to Consolidated Financial Statements. -------------------------------------------------------------------------------- 5 CONSOLIDATED SELECTED FINANCIAL HIGHLIGHTS MASSMUTUAL CORPORATE INVESTORS Selected data for each common share outstanding: For the nine months ended For the years ended December 31, 09/30/2006 ------------------------------------------------------------------------------- (Unaudited) 2005 2004 2003 2002 2001 ----------- ----------- ----------- ----------- ----------- ----------- Net asset value: Beginning of year $ 26.06 $ 24.34 $ 21.84 $ 19.40 $ 20.07 $ 20.74 ----------- ----------- ----------- ----------- ----------- ----------- Net investment income (a) 1.64 2.03 2.00 1.44 1.53 1.70 Net realized and unrealized gain (loss) on investments 2.03 1.96(b) 2.64 2.83 (0.59) (0.53) ----------- ----------- ----------- ----------- ----------- ----------- Total from investment operations 3.67 3.99 4.64 4.27 0.94 1.17 ----------- ----------- ----------- ----------- ----------- ----------- Dividends from net investment income to common shareholders (0.98) (2.11) (2.16) (1.84) (1.44) (1.79) Distributions from net realized gain on investments to common shareholders -- (0.18) -- -- (0.18) (0.09) Change from issuance of shares 0.02 0.02 0.02 0.01 0.01 0.04 ----------- ----------- ----------- ----------- ----------- ----------- Total distributions (0.96) (2.27) (2.14) (1.83) (1.61) (1.84) ----------- ----------- ----------- ----------- ----------- ----------- Net asset value: End of period/year $ 28.77 $ 26.06 $ 24.34 $ 21.84 $ 19.40 $ 20.07 ----------- ----------- ----------- ----------- ----------- ----------- Per share market value: End of period/year $ 34.00 $ 30.05 $ 28.50 $ 22.90 $ 19.49 $ 20.70 =========== =========== =========== =========== =========== =========== Total investment return Market value 16.77% 16.95% 36.10% 27.53% 1.35% 1.88% Net asset value (c) 14.34% 20.04% 22.76% 22.61% 4.80% 5.91% Net assets (in millions): End of period/year $ 262.78 $ 236.28 $ 218.51 $ 193.79 $ 171.03 $ 175.11 Ratio of operating expenses to average net assets 1.47%(d) 1.78% 1.93% 2.04% 1.82% 1.72% Ratio of interest expense to average net assets 0.61%(d) 0.73% 0.77% 0.82% 0.86% 0.84% Ratio of total expenses to average net assets 2.08%(d) 2.51% 2.70% 2.86% 2.68% 2.56% Ratio of net investment income to average net assets 7.95%(d) 7.98% 8.68% 6.95% 7.65% 8.20% Portfolio turnover 26.70% 35.22% 53.45% 56.10% 34.02% 24.48% (a) Calculated using average shares. (b) Amount includes $0.19 per share in litigation proceeds. (c) Net asset value return represents portfolio returns based on change in the Trust's net asset value assuming the reinvestment of all dividends and distributions which differs from the total investment return based on the Trust's market value due to the difference between the Trust's net asset value and the market value of its shares outstanding; past performance is no guarantee of future results. (d) Annualized. Senior securities: Total principal amount (in millions) $ 20 $ 20 $ 29 $ 20 $ 20 $ 20 Asset coverage per $1,000 of indebtedness $ 14,139 $ 12,814 $ 8,535 $ 10,689 $ 9,551 $ 9,756 See Notes to Consolidated Financial Statements. -------------------------------------------------------------------------------- 6 CONSOLIDATED SCHEDULE OF INVESTMENTS MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES - 70.17%:(A) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ PRIVATE PLACEMENT INVESTMENTS - 65.12% A T I ACQUISITION COMPANY A for-profit post-secondary school serving students in Texas, Florida and Arizona. 12% Senior Subordinated Note due 2012 $ 2,125,000 04/08/04 $ 2,125,000 $ 1,955,672 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 2,323 shs. 04/08/04 -- 23 Warrant, exercisable until 2012, to purchase preferred stock at $.01 per share (B) 63,287 shs. 03/23/06 63,958 633 ------------ ------------ 2,188,958 1,956,328 ------------ ------------ ADORN, INC. A manufacturer of wall panels, cabinets, moldings and countertops for houses and recreational vehicles. 12.5% Subordinated Note due 2010 $ 2,125,000 02/29/00 1,999,829 2,125,000 Warrant, exercisable until 2010, to purchase common stock at $.02 per share (B) 364 shs. 02/29/00 307,759 578,840 ------------ ------------ 2,307,588 2,703,840 ------------ ------------ AMERCABLE, INC. A manufacturer of electric power, instrumentation and control cables, primarily for the mining and oil and gas industries. 12% Senior Subordinated Note due 2013 $ 1,101,852 04/08/05 1,043,460 1,123,889 Limited Partnership Interest (B) 0.36% int. 04/07/05 78,704 152,836 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 125 shs. 04/08/05 122,463 242,478 ------------ ------------ 1,244,627 1,519,203 ------------ ------------ AMERICAN HOSPICE MANAGEMENT HOLDING LLC A for-profit hospice care provider in the United States. 12% Senior Subordinated Note due 2010 $ 2,125,000 01/22/04 1,937,258 2,162,832 Preferred Class A Unit (B) 3,223 uts. * 322,300 290,070 Common Class B Unit 30,420 uts. 01/22/04 1 291,840 Common Class D Unit (B) 6,980 uts. 09/12/06 1 70 ------------ ------------ 2,259,560 2,744,812 ------------ ------------ ARROW TRU-LINE HOLDINGS, INC. A manufacturer of hardware for residential and commercial overhead garage doors in North America. 12% Senior Subordinated Note due 2012 $ 1,627,660 05/18/05 1,530,045 1,660,213 Common Stock (B) 497 shs. 05/18/05 497,340 571,342 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 130 shs. 05/18/05 112,128 149,780 ------------ ------------ 2,139,513 2,381,335 ------------ ------------ AUGUSTA SPORTSWEAR HOLDING CO. A manufacturer and distributor of athletic apparel, activewear and team uniforms. 12% Senior Subordinated Note due 2012 $ 1,686,800 12/31/04 1,583,837 1,742,261 Common Stock (B) 520 shs. ** 519,622 934,866 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 137 shs. 12/31/04 119,482 247,358 ------------ ------------ 2,222,941 2,924,485 ------------ ------------ *01/22/04 and 09/12/06. **12/31/04, 03/31/05 and 05/02/06. ---------------------------------------------------------------------------------------------------------------------------------- 7 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ BETA BRANDS LTD. A manufacturer of hard candy and chocolate-coated products sold primarily to the Canadian market. 5% Promissory Note due 2009 (B) $ 195,498 03/31/04 $ 195,498 $ -- Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 4,895 shs. 03/31/04 1 -- ------------ ------------ 195,499 -- ------------ ------------ BRAVO SPORTS HOLDING CORPORATION A designer and marketer of niche branded consumer products including canopies, trampolines, in-line skates, skateboards, and urethane wheels. 12.5% Senior Subordinated Note due 2014 $ 2,281,593 06/30/06 2,145,499 2,272,716 Preferred Stock Class A (B) 879 shs. 06/30/06 268,121 254,713 Common Stock (B) 1 shs. 06/30/06 286 272 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 309 shs. 06/30/06 92,102 3 ------------ ------------ 2,506,008 2,527,704 ------------ ------------ C & J SPEC-RENT SERVICES, INC. A provider of coiled tubing and pressure pumping services to the oil and gas industry in Texas and Louisiana. 10% Senior Secured Term Note due 2012 $ 1,551,492 08/12/05 1,551,492 1,551,492 14% Senior Subordinated Note due 2013 $ 1,148,710 08/12/05 1,051,171 1,148,710 Common Stock (B) 470,150 shs. 08/12/05 470,150 1,514,118 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 86,716 shs. 08/12/05 106,592 279,270 ------------ ------------ 3,179,405 4,493,590 ------------ ------------ CAINS FOODS, L.P. A producer of mayonnaise and sauce products for both the retail and food service markets. Limited Partnership Interest (B) 3.69 % int. 09/29/95 45,046 143,302 ------------ ------------ CAPESUCCESS LLC A provider of diversified staffing services. Preferred Membership Interests (B) 1,882 uts. 04/29/00 8,396 420 Common Membership Interests (B) 24,318 uts. 04/29/00 108,983 5,442 ------------ ------------ 117,379 5,862 ------------ ------------ CAPITAL SPECIALTY PLASTICS, INC. A producer of desiccant strips used for packaging pharmaceutical products. Common Stock (B) 109 shs. * 503 55,408 ------------ ------------ COEUR, INC. A producer of proprietary, disposable power injection syringes. 8.75% Senior Secured Term Note due 2010 $ 462,862 04/30/03 462,862 468,979 11.5% Senior Subordinated Note due 2011 $ 424,819 04/30/03 396,367 435,208 Common Stock (B) 126,812 shs. 04/30/03 126,812 212,283 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 87,672 shs. 04/30/03 40,804 146,763 ------------ ------------ 1,026,845 1,263,233 ------------ ------------ *12/30/97 and 05/29/99. ---------------------------------------------------------------------------------------------------------------------------------- 8 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ COINING CORPORATION OF AMERICA LLC A manufacturer of close tolerance parts and metal stampings. 10.74% Senior Secured Revolving Credit Facility due 2007 (C) $ 108,025 01/07/02 $ 108,025 $ 107,083 10.74% Senior Secured Tranche A Note due 2007 (C) $ 759,887 06/26/01 759,887 749,759 13% Senior Secured Tranche B Note due 2008 $ 648,148 06/26/01 648,148 649,138 Limited Partnership Interest (B) 6.38% int. 06/26/01 324,074 560,000 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 107,036 shs. 06/26/01 79,398 184,958 ------------ ------------ 1,919,532 2,250,938 ------------ ------------ CONNOR SPORT COURT INTERNATIONAL, INC. A designer and manufacturer of outdoor and indoor synthetic sports flooring and other temporary flooring products. 12% Senior Subordinated Note due 2012 (D) $ 2,001,121 * 1,840,888 1,801,009 Limited Partnership Interest (B) 7.74% int. ** 189,586 1,896 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 174 shs. * 160,233 2 ------------ ------------ 2,190,707 1,802,907 ------------ ------------ CONSOLIDATED FOUNDRIES HOLDINGS A manufacturer of engineered cast metal components for the global aerospace and defense industries. 12% Senior Subordinated Note due 2013 $ 2,185,714 06/15/05 2,095,307 2,201,606 Common Stock (B) 509 shs. *** 526,096 457,839 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 103 shs. 06/15/05 100,668 1 ------------ ------------ 2,722,071 2,659,446 ------------ ------------ COREPHARMA LLC A manufacturer of oral dose generic pharmaceuticals targeted at niche applications. 12% Senior Subordinated Note due 2013 $ 2,550,000 08/04/05 2,423,881 2,532,288 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 20 shs. 08/04/05 137,166 -- ------------ ------------ 2,561,047 2,532,288 ------------ ------------ CORVEST GROUP, INC. A manufacturer and distributor of promotional products. 12% Senior Subordinated Note due 2009 (D) $ 3,863,636 **** 3,731,533 -- Common Stock (B) 56 shs. **** 96,591 -- Limited Partnership Interest (B) 19.32% int. **** 283,359 -- Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 324 shs. **** 297,203 -- ------------ ------------ 4,408,686 -- ------------ ------------ *08/12/04 and 01/18/05. **08/12/04 and 01/14/05. ***06/15/05 and 05/22/06. ****03/05/99 and 03/24/99. ---------------------------------------------------------------------------------------------------------------------------------- 9 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ DEXTER MAGNETICS TECHNOLOGIES, INC. A designer, fabricator, assembler and distributor of industrial magnets and subassemblies in North America and Europe. Common Stock 585 shs. 07/19/01 $ 585,145 $ 805,529 Warrant, exercisable until 2006, to purchase common stock at $.01 per share 297 shs. 07/19/01 250,611 408,278 ------------ ------------ 835,756 1,213,807 ------------ ------------ DIRECTED ELECTRONICS, INC. A designer and distributor of brand name automotive security systems, audio products and installation accessories. Common Stock (B) 239,547 shs. 12/19/05 76,530 3,255,441 Limited Partnership Interest (B) 8.70% int. * 49,531 653,116 ------------ ------------ 126,061 3,908,557 ------------ ------------ DIVERSCO, INC./DHI HOLDINGS, INC. A contract provider of janitorial and equipment maintenance services and temporary production labor to industrial customers. Membership Interests of MM/Lincap Diversco Investments Ltd. LLC (B) 27.19% int. 08/27/98 734,090 -- Preferred Stock (B) 3,278 shs. 12/14/01 2,784,133 2,505,724 Warrants, exercisable until 2011, to purchase common stock of DHI Holdings, Inc. at $.01 per share (B) 13,352 shs. ** 403,427 -- ------------ ------------ 3,921,650 2,505,724 ------------ ------------ DWYER GROUP, INC. A franchiser of a variety of home repair services. 14% Senior Subordinated Note due 2011 $ 1,859,375 10/30/03 1,715,335 1,896,563 Common Stock (B) 6,906 shs. *** 690,600 718,224 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 2,034 shs. 10/30/03 186,469 211,493 ------------ ------------ 2,592,404 2,826,280 ------------ ------------ E X C ACQUISITION CORPORATION A manufacturer of pre-filled syringes and pump systems used for intravenous drug delivery. Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 22 shs. 06/28/04 77,208 129,824 ------------ ------------ EAGLE PACK PET FOODS, INC. A manufacturer of premium pet food sold through independent pet stores. 12% Senior Subordinated Note due 2011 $ 1,517,857 **** 1,477,830 1,533,036 Warrant, exercisable until 2011, to purchase common stock at $.02 per share (B) 4,085 shs. 09/24/04 39,464 64,303 ------------ ------------ 1,517,294 1,597,339 ------------ ------------ *12/22/99 and 09/14/05. **10/24/96 and 08/28/98. ***10/30/03 and 01/02/04. ****09/24/04 and 04/20/06. ---------------------------------------------------------------------------------------------------------------------------------- 10 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ EAST RIVER VENTURES I, L.P. An acquirer of controlling or substantial interests in other entities. Limited Partnership Interest (B) 0.14% int. 01/01/01 $ 26,421 $ 8,104 ------------ ------------ ENZYMATIC THERAPY, INC. A manufacturer and distributor of branded natural medicines and nutritional supplements. Limited Partnership Interest (B) 1.32% int. 03/30/00 531,250 63,750 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 29,117 shs. 03/30/00 255,000 42,500 ------------ ------------ 786,250 106,250 ------------ ------------ EURO-PRO CORPORATION A designer, marketer and distributor of floor care, steam cleaning and small kitchen products and appliances. 13.25% Senior Subordinated Note due 2011 $ 2,125,000 09/09/03 2,089,359 212,500 16.03% Overdue Interest Secured Note due 2008 (C) $ 143,465 01/13/06 129,118 129,118 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 43,878 shs. 09/09/03 35,641 -- ------------ ------------ 2,254,118 341,618 ------------ ------------ EVANS CONSOLES, INC. A designer and manufacturer of consoles and control center systems. Common Stock (B) 90,000 shs. 05/06/04 6 -- ------------ ------------ 6 -- ------------ ------------ F H S HOLDING LLC A national provider of customized disease management services to large, self-insured employers. 12% Senior Subordinated Note due 2014 $ 2,390,625 06/01/06 2,223,415 2,424,813 Preferred Unit (B) 158 uts. 06/01/06 157,780 142,002 Common Unit (B) 1,594 uts. 06/01/06 1,594 1,434 Common Unit Class B (B) 1,386 uts. 06/01/06 122,361 110,125 ------------ ------------ 2,505,150 2,678,374 ------------ ------------ FLUTES, INC. An independent manufacturer of micro fluted corrugated sheet material for the food and consumer products packaging industries. 10% Senior Secured Term Note due 2013 $ 918,385 04/13/06 904,609 912,774 14% Senior Subordinated Note due 2014 $ 549,550 04/13/06 491,626 547,047 Common Stock (B) 109,436 shs. 04/13/06 109,436 98,492 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 30,940 shs. 04/13/06 48,433 309 ------------ ------------ 1,554,104 1,558,622 ------------ ------------ FOWLER HOLDING, INC. A provider of site development services to residential homebuilders and developers in the Raleigh/Durham region of North Carolina. 12% Senior Subordinated Note due 2013 $ 2,365,217 02/03/06 2,132,988 2,381,778 Common Stock (B) 185 shs. 02/03/06 184,783 166,302 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 254 shs. 02/03/06 208,435 3 ------------ ------------ 2,526,206 2,548,083 ------------ ------------ ---------------------------------------------------------------------------------------------------------------------------------- 11 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ FUEL SYSTEMS HOLDING CORPORATION An independent North American supplier of fuel tanks for a wide variety of commercial vehicles. 12% Senior Subordinated Note due 2014 $ 2,337,500 01/31/06 $ 2,177,150 $ 2,345,358 Common Stock (B) 212,500 shs. 01/31/06 212,500 191,250 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 138,408 shs. 01/31/06 119,213 1,384 ------------ ------------ 2,508,863 2,537,992 ------------ ------------ H M HOLDING COMPANY A designer, manufacturer, and importer of promotional and wood furniture. 12% Senior Subordinated Note due 2013 $ 2,210,000 02/10/06 2,053,736 2,188,071 Common Stock (B) 340 shs. 02/10/06 340,000 306,000 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 126 shs. 02/10/06 116,875 1 ------------ ------------ 2,510,611 2,494,072 ------------ ------------ HIGHGATE CAPITAL LLC An acquirer of controlling or substantial interests in manufacturing and marketing entities. Series A Preferred Units (B) 1.19% int. 07/21/94 367,440 2,947 ------------ ------------ HOME DECOR HOLDING COMPANY A designer, manufacturer and marketer of framed art and wall decor products. 12.5% Senior Subordinated Note due 2012 $ 2,043,269 * 1,872,984 2,086,560 Common Stock (B) 63 shs. * 62,742 83,796 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 200 shs. * 199,501 266,452 ------------ ------------ 2,135,227 2,436,808 ------------ ------------ INTEGRATION TECHNOLOGY SYSTEMS, INC. A manufacturer of steel protective computer and network systems for the industrial and office environments. 12% Senior Secured Note due 2007 $ 1,644,444 03/01/04 1,646,101 1,248,333 Common Stock (B) 228 shs. 06/01/00 262,200 -- ------------ ------------ 1,908,301 1,248,333 ------------ ------------ ITC^DELTACOM, INC. A provider of integrated communications services in the southeastern United States. 13.63% Senior Secured Note due 2009 (C) $ 2,227,179 07/26/05 2,182,810 2,231,364 17.13% Senior Secured Note due 2009 (C) $ 358,262 07/26/05 315,220 357,845 Warrant, exercisable until 2009, to purchase convertible preferred stock at $.01 per share (B) 102,884 shs. 07/26/05 34,295 179,018 ------------ ------------ 2,532,325 2,768,227 ------------ ------------ JASON, INC. A diversified manufacturing company serving various industrial markets. 13% Senior Subordinated Note due 2008 $ 963,687 08/04/00 919,665 955,497 14% Cumulative Redeemable Preferred Stock Series A (B) 289 shs. 08/04/00 289,224 282,775 Limited Partnership Interests of Saw Mill Capital Fund II, L.P. (B) 2.50% int. 08/03/00 886,352 709,205 Warrants, exercisable until 2008 and 2009, to purchase common stock at $.01 per share (B) 50,870 shs. 08/04/00 115,412 40,694 ------------ ------------ 2,210,653 1,988,171 ------------ ------------ * 06/30/04 and 08/19/04. ---------------------------------------------------------------------------------------------------------------------------------- 12 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ JUSTRITE MANUFACTURING ACQUISITION CO. A manufacturer of safety products such as storage cabinets and containers. 12% Senior Subordinated Note due 2011 $ 1,593,750 12/15/04 $ 1,509,220 $ 1,595,577 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 1,121 shs. 12/15/04 101,109 45,401 ------------ ------------ 1,610,329 1,640,978 ------------ ------------ K N B HOLDINGS CORPORATION A designer, manufacturer and marketer of products for the custom framing market. 13.5% Senior Subordinated Note due 2013 $ 2,419,414 05/25/06 2,301,650 2,410,067 Common Stock (B) 134,210 shs. 05/25/06 134,210 120,789 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 82,357 shs. 05/25/06 71,534 824 ------------ ------------ 2,507,394 2,531,680 ------------ ------------ KEEPSAKE QUILTING, INC. A seller of quilting fabrics, books, patterns, kits and notions to consumers. 8.89% Senior Secured Revolving Note due 2007 (C) $ 91,732 06/16/00 91,732 91,883 8.89% Senior Secured Tranche A Note due 2007 (C) $ 206,397 07/19/00 206,397 204,943 12% Senior Secured Tranche B Note due 2008 $ 550,392 06/16/00 536,343 554,233 Limited Partnership Interest of Riverside XVI Holding Company, L.P. (B) 5.29% int. 06/12/00 333,490 230,928 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 1,108 shs. 06/12/00 45,866 77,414 ------------ ------------ 1,213,828 1,159,401 ------------ ------------ KELE AND ASSOCIATES, INC. A distributor of building automation control products. 12% Senior Subordinated Note due 2012 $ 1,831,548 02/27/04 1,691,785 1,886,494 Preferred Stock (B) 23 shs. 11/24/04 449,164 456,950 Common Stock (B) 12 shs. 02/27/04 12,871 222,528 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 11 shs. 02/27/04 7,793 203,679 ------------ ------------ 2,161,613 2,769,651 ------------ ------------ KEYSTONE NORTH AMERICA, INC. An operator of funeral homes in North America. Common Stock 49,216 shs. 02/08/05 236,709 289,071 ------------ ------------ LIH INVESTORS, L.P. A manufacturer and marketer of a broad line of external accessories for new and used sport utility vehicles, trucks and vans. 12.5% Senior Subordinated Note due 2008 $ 3,845,000 * 3,593,821 3,747,048 Common Stock (B) 5,800 shs. * 406,003 88,668 Warrant, exercisable until 2006, to purchase common stock at $.11 per share (B) 15,572 shs. * 602,127 238,059 ------------ ------------ 4,601,951 4,073,775 ------------ ------------ *12/23/98 and 01/28/99. ---------------------------------------------------------------------------------------------------------------------------------- 13 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ MAGNATECH INTERNATIONAL, INC. A supplier of process equipment and related parts used in the manufacturing of medium and high-pressure reinforced hoses. 12% Senior Subordinated Note due 2014 $ 1,275,000 04/05/06 $ 1,185,981 $ 1,269,440 13% Preferred Stock (B) 565 shs. 04/05/06 565,335 537,064 Common Stock (B) 125 shs. 04/05/06 125,048 118,798 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 13 shs. 04/05/06 12,905 -- ------------ ------------ 1,889,269 1,925,302 ------------ ------------ MAVERICK ACQUISITION COMPANY A manufacturer of capsules that cover the cork and neck of wine bottles. 9.98% Senior Secured Tranche A Note due 2010 (C) $ 697,169 09/03/04 697,169 700,745 12% Senior Secured Tranche B Note due 2011 $ 313,433 09/03/04 281,618 317,742 Limited Partnership Interest (B) 7.84% int. 09/03/04 58,769 52,892 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 425 shs. 09/03/04 39,473 4 ------------ ------------ 1,077,029 1,071,383 ------------ ------------ MAXON CORPORATION A manufacturer of industrial combustion equipment and related shut-off valves and control valves. 12% Senior Subordinated Note due 2012 $ 962,215 09/30/04 886,579 990,460 8.75% Senior Subordinated Note due 2012 $ 1,155,562 09/30/04 1,155,562 1,192,316 Common Stock (B) 381,672 shs. 09/30/04 381,672 696,170 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 153,572 shs. 09/30/04 90,897 280,115 ------------ ------------ 2,514,710 3,159,061 ------------ ------------ MEDASSIST, INC. A provider of patient eligibility and accounts receivable management services to hospitals and physician practices. 8% Preferred Stock (B) 84 shs. 10/28/04 83,658 84,200 Common Stock (B) 26,185 shs. 10/28/04 35,088 87,259 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 88,948 shs. 05/01/03 40,675 296,412 ------------ ------------ 159,421 467,871 ------------ ------------ MICROGROUP, INC. A manufacturer of precision parts and assemblies, and a value-added supplier of metal tubing and bars. 12% Senior Subordinated Note due 2013 $ 2,685,614 * 2,523,081 2,732,491 Common Stock (B) 450 shs. * 450,000 405,000 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 164 shs. * 162,974 2 ------------ ------------ 3,136,055 3,137,493 ------------ ------------ MOMENTUM HOLDING CO. A designer and supplier of upholstery fabric to commercial furniture manufacturers and architectural and design firms. 12% Senior Subordinated Note due 2014 $ 1,168,847 08/04/06 1,039,360 1,182,372 Limited Partnership Interest (B) 106,153 uts. 08/04/06 106,153 95,538 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 1,107 shs. 08/04/06 107,109 11 ------------ ------------ 1,252,622 1,277,921 ------------ ------------ *08/12/05 and 09/11/06. ---------------------------------------------------------------------------------------------------------------------------------- 14 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ MONESSEN HOLDING CORPORATION A designer and manufacturer of a broad line of gas, wood, and electric hearth products and accessories. 12% Senior Subordinated Note due 2014 $ 2,550,000 03/31/06 $ 2,365,569 $ 2,538,880 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 152 shs. 03/31/06 138,125 2 ------------ ------------ 2,503,694 2,538,882 ------------ ------------ MORTON INDUSTRIAL GROUP, INC. A manufacturer of highly engineered metal fabricated components. 12% Senior Subordinated Note due 2014 $ 2,440,909 08/25/06 2,242,872 2,478,310 Common Stock (B) 109,091 shs. 08/25/06 109,091 98,182 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 173,633 shs. 08/25/06 149,940 1,736 ------------ ------------ 2,501,903 2,578,228 ------------ ------------ MOSS, INC. A manufacturer and distributor of large display and exhibit structures. 9.48% Senior Secured Revolving Note due 2010 (C) $ 92,647 07/03/06 92,647 93,481 9.48% Senior Secured Tranche A Note due 2010 (C) $ 962,500 12/21/05 952,875 967,874 12% Senior Secured Tranche B Note due 2010 $ 350,000 12/21/05 309,853 354,370 Limited Partnership Interest of Riverside Capital Appreciation Fund I, L.P. (B) 33.59% int. * 49 127,993 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 214 shs. 12/21/05 36,647 22,256 ------------ ------------ 1,392,071 1,565,974 ------------ ------------ NABCO, INC. A producer of explosive containment vessels in the United States. 12% Senior Subordinated Note due 2014 $ 625,000 02/24/06 576,841 617,533 Limited Partnership Interest (B) 650 uts. 02/24/06 650,000 617,500 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 48 shs. 02/24/06 37,188 -- ------------ ------------ 1,264,029 1,235,033 ------------ ------------ NEFF MOTIVATION, INC. A manufacturer and distributor of customized awards and sportswear to schools. 12.5% Senior Subordinated Note due 2011 $ 1,062,500 01/31/03 935,422 1,083,750 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 212 shs. 01/31/03 180,625 260,112 ------------ ------------ 1,116,047 1,343,862 ------------ ------------ NONNI'S FOOD COMPANY A producer and distributor of premium biscotti and bagel chips in North America. 12.25% Senior Subordinated Note due 2012 $ 1,863,462 03/29/04 1,856,139 1,855,668 10% Preferred Stock (B) 255 shs. 03/29/04 255,083 253,390 Common Stock (B) 6,455 shs. 03/29/04 6,455 49,545 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 8,622 shs. 03/29/04 7,323 66,106 ------------ ------------ 2,125,000 2,224,709 ------------ ------------ *09/20/00 and 05/23/02. ---------------------------------------------------------------------------------------------------------------------------------- 15 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ NYLONCRAFT, INC. A supplier of engineered plastic components for the automotive industry. 9% Senior Secured Note due 2009 $ 812,500 01/28/02 $ 812,500 $ 794,710 11.5% Senior Subordinated Note due 2012 $ 1,500,000 01/28/02 1,393,316 1,418,482 Common Stock (B) 312,500 shs. 01/28/02 312,500 156,250 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 243,223 shs. 01/28/02 162,045 121,612 ------------ ------------ 2,680,361 2,491,054 ------------ ------------ O R S NASCO HOLDING, INC. A wholesale distributor of industrial supplies in North America. 13% Senior Subordinated Note due 2013 $ 2,372,732 12/20/05 2,231,588 2,384,714 Common Stock (B) 177,268 shs. 12/20/05 177,268 159,541 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 99,771 shs. 12/20/05 98,773 998 ------------ ------------ 2,507,629 2,545,253 ------------ ------------ OAKRIVER TECHNOLOGY, INC. Designs, engineers and assembles high precision automated process equipment for the medical device industry, with a focus on defibrillators and stents. 10% Senior Secured Note due 2012 $ 565,452 01/03/06 556,970 562,104 13% Senior Subordinated Note due 2013 $ 687,241 01/03/06 614,154 683,318 Common Stock (B) 322,307 shs. 01/03/06 322,307 290,076 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 72,185 shs. 01/03/06 62,824 722 ------------ ------------ 1,556,255 1,536,220 ------------ ------------ OLYMPIC SALES, INC. A boat retailer in Washington state, Oregon, California and British Columbia. 12% Senior Subordinated Note due 2008 $ 2,205,071 ** 2,197,902 2,129,144 Limited Partnership Interest of Riverside VIII, VIII-A and VIII-B Holding Company, L.P. (B) 20.57% int. * 1,555,992 1,555,626 Warrants, exercisable until 2007 and 2008, to purchase common stock at $.01 per share (B) 28,648 shs. ** 389,188 385,720 ------------ ------------ 4,143,082 4,070,490 ------------ ------------ ONTARIO DRIVE & GEAR LTD. A manufacturer of all-wheel drive, off-road amphibious vehicles and related accessories. 13% Senior Subordinated Note due 2013 $ 1,977,885 01/17/06 1,779,319 1,985,001 Limited Partnership Interest (B) 3,667 uts. 01/17/06 572,115 514,903 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 619 shs. 01/17/06 170,801 6 ------------ ------------ 2,522,235 2,499,910 ------------ ------------ *08/07/98, 02/23/99, 12/22/99 and 02/25/03. **08/07/98 and 02/09/00. ---------------------------------------------------------------------------------------------------------------------------------- 16 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ OVERTON'S HOLDING COMPANY A marketer of marine and water sports accessories in the United States. 12% Senior Subordinated Note due 2014 $ 1,817,308 04/28/06 $ 1,699,718 $ 1,820,845 Common Stock (B) 95 shs. 04/28/06 95,000 85,500 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 94 shs. 04/28/06 83,720 1 ------------ ------------ 1,878,438 1,906,346 ------------ ------------ P A S HOLDCO LLC An independent provider of maintenance, repair and overhaul services to the aerospace gas turbine engine and airframe markets. 14% Senior Subordinated Note due 2014 $ 2,167,847 07/03/06 2,056,727 2,162,824 Preferred Unit (B) 382 uts. 07/03/06 382,150 363,043 Preferred Unit (B) 69 uts. 07/03/06 68,790 65,351 Common Unit Class I (B) 148 uts. 07/03/06 -- 1 Common Unit Class L (B) 31 uts. 07/03/06 -- -- ------------ ------------ 2,507,667 2,591,219 ------------ ------------ P I I HOLDING CORPORATION A manufacturer of plastic film and bags for the general industrial, medical, and food industries. 12% Senior Subordinated Note due 2013 $ 2,295,000 03/31/06 2,143,104 2,293,983 Preferred Stock (B) 36 shs. 03/31/06 329,596 313,116 Common Stock (B) 23 shs. 03/31/06 25,500 22,950 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 13 shs. 03/31/06 11,122 -- ------------ ------------ 2,509,322 2,630,049 ------------ ------------ PARADIGM PACKAGING, INC. A manufacturer of plastic bottles and closures for the nutritional, pharmaceutical, personal care and food packaging markets. 12% Senior Subordinated Note due 2008 $ 2,125,000 12/19/00 2,018,475 2,084,933 Membership Interests of MM/Lincap PPI Investments, Inc., LLC (B) 2.42% int. 12/21/00 265,625 280,043 ------------ ------------ 2,284,100 2,364,976 ------------ ------------ PROTEIN GENETICS, INC. A producer of bovine artificial insemination products, related breeding and healthcare products and specialty genetics sold to the dairy and beef industries. 9.8% Redeemable Exchangeable Preferred Stock (B) 1,004 shs. 08/12/94 100,350 -- Common Stock (B) 2,600 shs. * 126,866 -- ------------ ------------ 227,216 -- ------------ ------------ QUALIS AUTOMOTIVE LLC A distributor of aftermarket automotive brake and chassis products. 12% Senior Subordinated Note due 2012 $ 1,770,834 05/28/04 1,472,818 1,821,339 Common Stock 354,166 shs. 05/28/04 354,166 653,436 Warrant, exercisable until 2012, to purchase common stock at $.01 per share 377,719 shs. 05/28/04 377,719 696,892 ------------ ------------ 2,204,703 3,171,667 ------------ ------------ *11/14/01 and 08/12/94. ---------------------------------------------------------------------------------------------------------------------------------- 17 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ QUALSERV CORPORATION A provider of foodservice equipment and supplies to major restaurant chains and their franchisees. 14% Senior Subordinated Note due 2012 (D) $ 1,893,563 07/09/04 $ 1,844,035 $ 1,136,138 Limited Partnership Interest (B) 9.26% int. 07/09/04 259,146 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 528 shs. 07/09/04 49,061 -- ------------ ------------ 2,152,242 1,136,138 ------------ ------------ RADIAC ABRASIVES, INC. A manufacturer of bonded abrasive and super abrasive grinding wheels in the United States. 12% Senior Subordinated Note due 2014 $ 2,260,638 02/10/06 2,102,816 2,245,513 Common Stock (B) 289,362 shs. 02/10/06 289,362 260,426 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 131,555 shs. 02/10/06 119,796 1,316 ------------ ------------ 2,511,974 2,507,255 ------------ ------------ RIVER RANCH FRESH FOODS LLC A supplier of fresh produce to the retail and foodservice channels. 13% Senior Subordinated Note due 2011 (D) $ 1,841,667 09/29/04 1,683,764 1,473,334 Limited Partnership Interest (B) 40,610 uts. 09/29/04 283,333 -- Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,575 shs. 09/29/04 157,903 -- ------------ ------------ 2,125,000 1,473,334 ------------ ------------ ROYAL BATHS MANUFACTURING COMPANY A manufacturer and distributor of acrylic and cultured marble bathroom products. 12.5% Senior Subordinated Notes due 2011 $ 1,062,500 11/14/03 968,985 1,080,879 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 140 shs. 11/14/03 122,946 92,775 ------------ ------------ 1,091,931 1,173,654 ------------ ------------ SAFETY SPEED CUT MANUFACTURING COMPANY, INC. A manufacturer of vertical panel saws and routers for the wood working industry. 8.73% Senior Secured Tranche A Note due 2007 (C) $ 423,995 06/02/99 423,995 423,995 12% Senior Secured Tranche B Note Due 2007 $ 1,130,652 06/02/99 1,130,652 1,130,652 Class B Common Stock (B) 1,480 shs. 06/02/99 256,212 699,633 ------------ ------------ 1,810,859 2,254,280 ------------ ------------ SAVAGE SPORTS HOLDING, INC. A manufacturer of sporting firearms. 12% Senior Subordinated Note due 2012 $ 1,538,793 09/10/04 1,442,768 1,533,674 Common Stock (B) 586 shs. 09/10/04 586,207 478,207 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 134 shs. 09/10/04 113,578 109,001 ------------ ------------ 2,142,553 2,120,882 ------------ ------------ SPECIALTY FOODS GROUP, INC. A manufacturer and distributor of branded meat products. Limited Partnership Interest of MHD Holdings LLC 1.43% int. 08/29/00 684,724 -- ------------ ------------ ---------------------------------------------------------------------------------------------------------------------------------- 18 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ STANTON CARPET HOLDING CO. A designer and marketer of high and mid-priced decorative carpets and rugs. 12.125% Senior Subordinated Note due 2014 $ 2,239,024 08/01/06 $ 2,101,851 $ 2,244,006 Common Stock (B) 311 shs. 08/01/06 310,976 279,882 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 104 shs. 08/01/06 93,293 1 ------------ ------------ 2,506,120 2,523,889 ------------ ------------ STRATEGIC EQUIPMENT & SUPPLY CORPORATION, INC. A provider of kitchen and restaurant design, equipment fabrication and installation services. Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 106,539 shs. 01/14/00 658,751 -- ------------ ------------ SYNVENTIVE EQUITY LLC A manufacturer of hot runner systems used in the plastic injection molding process. Limited Partnership Interest (B) 1.99% int. 08/20/03 63,206 14,100 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 86,780 shs. 08/21/03 19,359 19,359 ------------ ------------ 82,565 33,459 ------------ ------------ TANGENT RAIL CORPORATION A manufacturer of rail ties and provides specialty services to the North American railroad industry. 13% Senior Subordinated Note due 2013 $ 2,217,385 10/14/05 1,899,620 2,281,579 Preferred Stock (B) 3,304 shs. 10/14/05 330,412 340,415 Common Stock (B) 2,203 shs. 10/14/05 2,203 1,983 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 1,167 shs. 10/14/05 294,403 12 ------------ ------------ 2,526,638 2,623,989 ------------ ------------ TERRA RENEWAL SERVICES, INC. A provider of wastewater residual management and required environmental reporting, permitting, nutrient management planning and record keeping to companies involved in poultry and food processing. 8.68% Senior Secured Tranche A Note due 2011 (C) $ 278,906 04/28/06 277,512 275,617 8.75% Senior Secured Tranche A Note due 2011 (C) $ 213,281 04/28/06 213,237 210,766 8.93% Senior Secured Tranche B Note due 2012 (C) $ 314,795 04/28/06 314,795 310,537 8.65% Senior Secured Tranche B Note due 2012 (C) $ 423,487 04/28/06 421,610 417,758 8.64% Senior Secured Tranche B Note due 2012 (C) $ 366,680 09/11/06 364,847 361,720 12% Senior Subordinated Note due 2014 $ 1,162,110 04/28/06 1,105,481 1,164,918 Limited Partnership Interest of Saw Mill Capital Fund V, L.P. 2.30% int. 03/01/05 215,742 194,173 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 72 shs. 04/28/06 60,597 1 ------------ ------------ 2,973,821 2,935,490 ------------ ------------ ---------------------------------------------------------------------------------------------------------------------------------- 19 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ THE TRANZONIC COMPANIES A producer of commercial and industrial supplies, such as safety products, janitorial supplies, work apparel, washroom and restroom supplies and sanitary care products. 13% Senior Subordinated Note due 2009 $ 2,712,000 02/05/98 $ 2,559,446 $ 2,712,000 Common Stock (B) 630 shs. 02/04/98 630,000 627,425 Warrant, exercisable until 2006, to purchase common stock at $.01 per share (B) 444 shs. 02/05/98 368,832 442,185 ------------ ------------ 3,558,278 3,781,610 ------------ ------------ TRANSTAR HOLDING COMPANY A distributor of aftermarket automotive transmission parts. 12% Senior Subordinated Note due 2013 $ 1,734,000 08/31/05 1,661,973 1,782,926 Common Stock (B) 816 shs. 08/31/05 816,000 775,200 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 86 shs. 08/31/05 77,485 1 ------------ ------------ 2,555,458 2,558,127 ------------ ------------ TRONAIR, INC. A designer, engineer and manufacturer of ground support equipment for the business, commuter and commercial aviation markets. 10.5% Senior Secured Term Note due 2008 $ 789,836 01/20/00 789,836 794,231 12% Senior Subordinated Note due 2010 $ 1,326,500 01/20/00 1,283,615 1,352,451 Common Stock (B) 227,400 shs. 01/20/00 227,400 548,489 Warrant, exercisable until 2010, to purchase common stock at $1 per share (B) 260,563 shs. 01/20/00 98,540 628,478 ------------ ------------ 2,399,391 3,323,649 ------------ ------------ TRUCK BODIES & EQUIPMENT INTERNATIONAL A designer and manufacturer of accessories for heavy and medium duty trucks, primarily dump bodies, hoists, various forms of flat-bed bodies, landscape bodies and other accessories. 12% Senior Subordinated Note due 2013 $ 2,309,541 * 2,153,975 2,391,103 Common Stock (B) 742 shs. * 800,860 1,004,517 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 153 shs. * 159,894 207,469 ------------ ------------ 3,114,729 3,603,089 ------------ ------------ TRUSTILE DOORS, INC. A manufacturer and distributor of interior doors. 12.5% Senior Subordinated Note due 2010 $ 1,062,500 04/11/03 1,002,760 1,083,750 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 5,781 shs. 04/11/03 95,625 122,006 ------------ ------------ 1,098,385 1,205,756 ------------ ------------ TUBULAR TEXTILE MACHINERY A designer, manufacturer, seller and servicer of finishing machinery for the knit and woven segments of the global textile industry. 12% Senior Subordinated Note due 2014 $ 1,234,551 05/28/04 1,124,084 1,222,852 8.75% Senior Secured Note due 2011 $ 716,292 05/28/04 716,291 715,089 Common Stock (B) 674,157 shs. 05/28/04 674,157 573,033 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 203,912 shs. 05/28/04 130,789 2,039 ------------ ------------ 2,645,321 2,513,013 ------------ ------------ *07/19/05 and 12/22/05. ---------------------------------------------------------------------------------------------------------------------------------- 7 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ U S S HOLDINGS, INC. A producer of high grade industrial and specialty silica sands. 14% Redeemable Preferred Stock (B) 997 shs. 09/30/99 $ 545,858 $ 108,991 Convertible Preferred Stock Series A and B, convertible into common stock at $9.26 per share (B) 145,446 shs. 12/19/96 1,166,829 -- Common Stock (B) 20,027 shs. 09/30/99 799,068 -- Warrants, exercisable until 2010 to purchase common stock at $.01 per share (B) 4,918 shs. * 128,372 -- ------------ ------------ 2,640,127 108,991 ------------ ------------ U-LINE CORPORATION A manufacturer of high-end, built-in, undercounter ice making, wine storage and refrigeration appliances. 12.5% Senior Subordinated Note due 2012 $ 1,882,100 04/30/04 1,709,257 1,937,833 Common Stock (B) 182 shs. 04/30/04 182,200 229,572 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 230 shs. 04/30/04 211,735 290,329 ------------ ------------ 2,103,192 2,457,734 ------------ ------------ VICTORY VENTURES LLC An acquirer of controlling or substantial interests in other entities. Series A Preferred Units (B) 0.15% int. 12/02/96 1 2 ------------ ------------ VITALITY FOODSERVICE, INC. A non-carbonated beverage dispensing company focused on the foodservice industry. 13% Senior Subordinated Note due 2011 $ 1,887,288 09/24/04 1,735,845 1,879,839 Common Stock (B) 23,771 shs. 09/24/04 237,710 288,818 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,787 shs. 09/24/04 186,883 289,012 ------------ ------------ 2,160,438 2,457,669 ------------ ------------ VITEX PACKAGING GROUP, INC. A manufacturer of specialty packaging, primarily envelopes and tags used on tea bags. 12.5% Senior Subordinated Note due 2012 $ 1,700,000 07/19/04 1,483,065 1,616,064 Limited Partnership Interest Class A (B) 1.75% int. 07/19/04 414,375 372,938 Limited Partnership Interest Class B (B) 0.77% int. 07/19/04 182,935 164,641 ------------ ------------ 2,080,375 2,153,643 ------------ ------------ WALLS INDUSTRIES, INC. A provider of branded workwear and sporting goods apparel. 10% Senior Subordinated Lien Note due 2009 $ 838,816 07/12/04 838,816 838,821 14% Senior Subordinated Note due 2012 $ 1,085,380 07/12/04 1,082,875 1,107,088 Limited Partnership Interest (B) 0.40% int. 07/12/04 37,280 511,010 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 4,029 shs. 07/12/04 2,833 55,223 ------------ ------------ 1,961,804 2,512,142 ------------ ------------ TOTAL PRIVATE PLACEMENT INVESTMENTS $172,001,321 $171,119,067 ------------ ------------ *12/19/96 and 09/30/99. ---------------------------------------------------------------------------------------------------------------------------------- 21 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares or Interest Due Principal CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Rate Date Amount Cost Fair Value ------- -------- ------------ ------------ ------------ RULE 144A SECURITIES - 5.05%: BONDS - 5.05% A E S Corporation 9.000% 05/15/15 $ 200,000 $ 200,000 $ 215,500 Activant Solutions, Inc. (C) 9.500 05/01/16 150,000 150,000 138,750 American Tire Distributor (C) 11.758 04/01/12 1,000,000 950,000 911,250 Basic Energy Services 7.125 04/15/16 225,000 225,000 217,125 Bombardier, Inc. 6.300 05/01/14 1,000,000 890,000 897,500 Brigham Exploration Co. 9.625 05/01/14 700,000 690,403 682,500 Calpine Corporation 8.750 07/15/13 500,000 465,000 503,750 Charter Communications Op LLC 8.000 04/30/12 250,000 249,375 251,875 Douglas Dynamics LLC 7.750 01/15/12 630,000 633,405 595,350 Edison Mission Energy 7.750 06/15/16 500,000 500,000 506,250 G F S I, Inc. 11.000 06/01/11 750,000 682,541 720,000 Interactive Health LLC 7.250 04/01/11 872,000 747,932 697,600 Packaging Dynamics Corporation of America 10.000 05/01/16 700,000 700,000 707,000 Petrohawk Energy Corporation 9.125 07/15/13 1,000,000 998,025 1,005,000 Pregis Corporation 12.375 10/15/13 1,000,000 981,490 1,040,000 Service Corporation International (C) 8.000 06/15/17 1,000,000 990,030 957,500 Stewart & Stevenson LLC 10.000 07/15/14 1,200,000 1,225,610 1,215,000 Tekni-Plex, Inc. (C) 9.750 11/15/13 650,000 655,903 641,875 Tenaska Alabama Partners LP 7.000 06/30/21 351,805 351,805 344,738 Tunica-Biloxi Gaming Authority 9.000 11/15/15 1,000,000 1,032,773 1,040,000 ------------ ------------ TOTAL BONDS 13,319,292 13,288,563 ------------ ------------ COMMON STOCK - 0.00% Jordan Telecom Products 70 $ 14,000 -- ------------ ------------ TOTAL COMMON STOCK 14,000 -- ------------ ------------ WARRANTS - 0.00% Winsloew Furniture, Inc. (B) 900 $ 9 $ -- ------------ ------------ TOTAL WARRANTS 9 -- ------------ ------------ TOTAL RULE 144A SECURITIES 13,333,301 13,288,563 ------------ ------------ TOTAL CORPORATE RESTRICTED SECURITIES $185,334,622 $184,407,630 ------------ ------------ ---------------------------------------------------------------------------------------------------------------- 22 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES - 30.06%:(A) Rate Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ BONDS - 27.93% A M C Entertainment, Inc. 11.000% 02/01/16 $ 815,000 $ 817,373 $ 888,350 Abitibi-Consolidated, Inc. 7.750 06/15/11 1,000,000 1,028,295 915,000 Affinia Group, Inc. 9.000 11/30/14 910,000 834,625 848,575 Alamosa Delaware, Inc. 11.000 07/31/10 325,000 328,958 355,063 Alamosa Delaware, Inc. 8.500 01/31/12 400,000 400,000 426,000 ALH Fin LLC/ALH Fin Corporation 8.500 01/15/13 950,000 918,813 928,625 Allied Waste NA 7.875 04/15/13 1,000,000 1,022,846 1,022,500 Appleton Papers, Inc. 8.125 06/15/11 300,000 300,000 300,000 Argo Tech Corporation 9.250 06/01/11 850,000 850,000 884,000 Atlas Pipeline Partners 8.125 12/15/15 200,000 200,000 203,500 Bally Total Fitness Holding Corporation 9.875 10/15/07 135,000 128,925 119,475 BCP Crystal US Holdings Corporation 9.625 06/15/14 485,000 485,000 526,225 Blockbuster, Inc. (C) 9.000 09/01/12 475,000 476,009 435,813 CCH I Holdings LLC 11.000 10/01/15 1,000,000 890,000 910,000 CCH I Holdings LLC 11.125 01/15/14 1,000,000 640,438 702,500 Cablevision Systems Corporation 8.000 04/15/12 1,000,000 1,014,071 1,012,500 Cadmus Communications Corporation 8.375 06/15/14 1,000,000 995,625 967,500 Cenveo Corporation 7.875 12/01/13 1,100,000 1,100,000 1,042,250 Chemed Corporation 8.750 02/24/11 1,125,000 1,125,000 1,167,188 Chesapeake Energy Corporation 7.000 08/15/14 1,075,000 1,111,865 1,062,906 Cincinnati Bell, Inc. 8.375 01/15/14 1,100,000 1,007,500 1,111,000 Clayton Williams Energy, Inc. 7.750 08/01/13 800,000 800,000 720,000 Consolidated Container Corporation (E) 0.000 06/15/09 750,000 719,536 720,000 Del Monte Corporation 8.625 12/15/12 225,000 225,000 235,969 Dollar Financial Group 9.750 11/15/11 444,000 444,000 484,377 Dominos Pizza, Inc. 8.250 07/01/11 292,000 289,891 306,600 Dynegy Holdings, Inc. 6.875 04/01/11 500,000 422,500 486,875 Dynegy Holdings, Inc. 8.375 05/01/16 330,000 330,000 335,775 El Paso Corporation 7.875 06/15/12 1,050,000 1,061,836 1,089,375 Esterline Technologies 7.750 06/15/13 200,000 200,000 202,000 Flextronics International Ltd. 6.500 05/15/13 400,000 400,000 396,000 Ford Motor Credit Co. 7.375 10/28/09 1,250,000 1,246,875 1,214,755 Gencorp, Inc. 9.500 08/15/13 259,000 259,000 269,360 General Motors Acceptance Corporation 7.750 01/19/10 1,250,000 1,296,462 1,280,805 Geo Sub Corporation 11.000 05/15/12 600,000 595,500 618,000 Goodyear Tire & Rubber Co. 7.857 08/15/11 1,400,000 1,342,750 1,361,500 Great Lakes Dredge & Dock Corporation 7.750 12/15/13 1,015,000 926,319 943,950 GulfMark Offshore, Inc. 7.750 07/15/14 565,000 562,599 567,825 Houghton Mifflin Co. 9.875 02/01/13 1,000,000 1,046,570 1,057,500 Imax Corporation 9.625 12/01/10 1,000,000 1,028,673 952,500 Inergy LP 8.250 03/01/16 150,000 150,000 155,250 Insurance Auto Auctions, Inc. 11.000 04/01/13 1,000,000 1,009,298 995,000 Intelsat Subsidiary Holding Company Ltd. (C) 9.614 01/15/12 1,000,000 1,009,727 1,013,750 Interline Brands, Inc. 8.125 06/15/14 325,000 322,670 329,062 Iron Mountain, Inc. 8.750 07/15/18 1,065,000 1,100,319 1,104,938 Koppers Inc. 9.875 10/15/13 477,000 477,000 516,353 Land O'Lakes, Inc. 9.000 12/15/10 750,000 750,000 795,000 Lazard LLC 7.125 05/15/15 750,000 749,408 781,478 Leucadia National Corporation 7.000 08/15/13 650,000 661,355 656,500 Liberty Media Corporation 5.700 05/15/13 1,000,000 951,610 943,621 Lodgenet Entertainment Corporation 9.500 06/15/13 425,000 425,000 454,750 Lyondell Chemical Co. 9.500 12/15/08 530,000 516,360 545,238 ---------------------------------------------------------------------------------------------------------------- 23 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES(A)(Continued) Rate Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ BONDS, CONTINUED M G M Mirage, Inc. 6.000% 10/01/09 $ 375,000 $ 378,566 $ 370,312 Mac-Gray Corporation 7.625 08/15/15 600,000 600,000 612,000 Majestic Star Casino LLC 9.500 10/15/10 500,000 500,000 511,250 Manitowoc Company, Inc. 7.125 11/01/13 200,000 200,000 197,000 Markwest Energy Operating Co. 6.875 11/01/14 475,000 475,000 446,500 Mediacom LLC 9.500 01/15/13 1,000,000 1,002,127 1,022,500 Metaldyne Corporation 11.000 06/15/12 750,000 601,250 675,000 Metaldyne Corporation (C) 10.000 11/01/13 510,000 513,585 515,100 Mrs. Fields Brands 11.500 03/15/11 750,000 713,710 630,000 N R G Energy, Inc. 7.375 02/01/16 175,000 175,000 173,905 Nalco Co. 7.750 11/15/11 500,000 500,000 510,000 National Wine & Spirits, Inc. 10.125 01/15/09 1,260,000 1,252,429 1,272,600 Neiman Marcus Group, Inc. 10.375 10/15/15 1,250,000 1,250,000 1,350,000 Newark Group, Inc. 9.750 03/15/14 850,000 796,863 824,500 North American Energy Partners 8.750 12/01/11 400,000 400,000 399,000 Nova Chemicals Corporation (C) 8.405 11/15/13 475,000 475,000 484,500 NTL Cable PLC 9.125 08/15/16 980,000 1,003,229 1,011,850 O E D Corp/Diamond Jo Company Guarantee 8.750 04/15/12 1,000,000 985,960 1,000,000 Offshore Logistics, Inc. 6.125 06/15/13 450,000 450,000 421,875 P Q Corporation 7.500 02/15/13 1,100,000 1,088,750 1,045,000 Pacific Energy Partners 7.125 06/15/14 500,000 503,813 510,000 Pacific Energy Partners 6.250 09/15/15 150,000 149,316 147,750 Pinnacle Foods Group 8.250 12/01/13 450,000 450,000 450,563 Pliant Corporation (C) 11.850 06/15/09 833,687 832,980 929,562 Primedia, Inc. 8.000 05/15/13 1,000,000 1,023,355 907,500 Quality Distribution LLC 9.000 11/15/10 300,000 288,000 287,250 Quality Distribution LLC (C) 10.007 01/15/12 325,000 323,375 329,875 Quicksilver Resources, Inc 7.125 04/01/16 500,000 500,000 473,750 Rent-A-Center, Inc. 7.500 05/01/10 400,000 400,000 402,000 Rent-Way, Inc. 11.875 06/15/10 800,000 832,759 928,000 Rock-Tenn Co. 8.200 08/15/11 1,000,000 1,006,795 1,040,000 Rogers Wireless, Inc. 7.250 12/15/12 165,000 165,000 172,630 Rogers Wireless, Inc. 7.500 03/15/15 870,000 929,188 928,725 Rogers Wireless, Inc. 8.000 12/15/12 165,000 165,000 175,312 Samsonite Corporation 8.875 06/01/11 1,000,000 1,038,330 1,047,500 Sbarro, Inc. 11.000 09/15/09 1,000,000 1,013,157 1,017,500 Sheridan Acquisition Corporation 10.250 08/15/11 375,000 370,000 379,688 Sierra Pacific Resources 6.750 08/15/17 635,000 638,204 635,268 Stanadyne Corporation 10.000 08/15/14 1,500,000 1,500,000 1,515,000 Sungard Data Systems 9.125 08/15/13 175,000 175,000 181,125 Tekni-Plex, Inc. 12.750 06/15/10 1,000,000 960,125 850,000 Telex Communications, Inc. 11.500 10/15/08 500,000 500,000 530,000 Tenet Healthcare Corporation 9.875 07/01/14 500,000 488,370 498,125 Tenneco, Inc. 8.625 11/15/14 1,000,000 1,002,500 987,500 Texas Industries, Inc. 7.250 07/15/13 70,000 70,000 70,000 Trimas Corporation 9.875 06/15/12 625,000 566,250 578,125 Triton P C S, Inc. 8.500 06/01/13 550,000 550,000 510,125 Unisys Corporation 8.000 10/15/12 190,000 190,000 177,650 United Components, Inc. 9.375 06/15/13 1,080,000 1,081,719 1,069,200 United Rentals, Inc. 7.750 11/15/13 625,000 625,000 615,625 United Rentals, Inc. 7.000 02/15/14 500,000 500,000 470,000 Universal City Florida 8.375 05/01/10 200,000 200,000 200,750 ---------------------------------------------------------------------------------------------------------------- 24 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Shares or Interest Due Principal CORPORATE PUBLIC SECURITIES(A)(Continued) Rate Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ BONDS, CONTINUED Universal City Florida (C) 10.239% 05/01/10 $ 200,000 $ 200,000 $ 205,500 Vertis, Inc. 10.875 06/15/09 280,000 275,400 281,400 Vought Aircraft Industries 8.000 07/15/11 1,000,000 999,899 917,500 Warner Music Group 7.375 04/15/14 275,000 275,000 268,125 Waste Services, Inc. 9.500 04/15/14 1,100,000 1,124,739 1,127,500 Wornick Co. 10.875 07/15/11 750,000 750,000 746,250 ------------ ------------ TOTAL BONDS 73,020,344 73,398,341 ------------ ------------ COMMON STOCK - 1.04% Bally Total Fitness Holding Corporation (B) 600 $ 5,520 $ 906 Bare Escentuals, Inc (B) 400 8,800 10,860 PepsiAmericas, Inc. 92,145 2,006,365 1,966,374 Supreme Industries, Inc. 115,722 267,325 766,080 ------------ ------------ TOTAL COMMON STOCK 2,288,010 2,744,220 ------------ ------------ CONVERTIBLE BONDS - 1.09% Citadel Broadcasting Corporation 1.875% 02/15/11 $ 700,000 $ 543,375 $ 569,625 Graftech International 1.625 01/15/24 1,500,000 1,083,750 1,078,125 ICOS Corporation 2.000 07/01/23 750,000 596,250 644,062 Q L T, Inc. 3.000 09/15/23 600,000 546,257 555,750 ------------ ------------ TOTAL CONVERTIBLE BONDS 2,769,632 2,847,562 ------------ ------------ TOTAL CORPORATE PUBLIC SECURITIES $ 78,077,986 $ 78,990,123 ------------ ------------ Interest Due Principal SHORT-TERM SECURITIES: Rate/Yield Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ COMMERCIAL PAPER - 2.30% Detroit Edison Co. 5.300% 10/02/06 $ 3,777,000 $ 3,775,888 $ 3,775,888 Kraft Foods, Inc. 5.310 10/03/06 789,000 788,651 788,651 Kraft Foods, Inc. 5.330 10/04/06 1,475,000 1,474,126 1,474,126 ------------ ------------ TOTAL SHORT-TERM SECURITIES $ 6,038,665 $ 6,038,665 ------------ ------------ TOTAL INVESTMENTS 102.53% $269,451,273 $269,436,418 ============ ------------ Other Assets 5.93 15,576,529 Liabilities (8.46) (22,228,609) ------ ------------ TOTAL NET ASSETS 100.00% $262,784,338 ====== ============ (A) In each of the convertible note, warrant, convertible preferred and common stock investments, the issuer has agreed to provide certain registration rights. (B) Non-income producing security. (C) Variable rate security; rate indicated is as of 09/30/06. (D) Defaulted Security; interest not accrued. (E) Step Bond: Coupon rate is zero or below market for an initial period and then increases to a higher coupon rate at a specified date. SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ---------------------------------------------------------------------------------------------------------------- 25 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: Market Value Market Value -------------- -------------- AEROSPACE - 2.86% BUILDINGS & REAL ESTATE - 1.51% Argo Tech Corporation $ 884,000 Adorn, Inc. $ 2,703,840 Consolidated Foundries Holdings 2,659,446 Texas Industries, Inc. 70,000 Esterline Technologies 202,000 TruStile Doors, Inc. 1,205,756 Gencorp, Inc. 269,360 -------------- P A S Holdco LLC 2,591,219 3,979,596 Vought Aircraft Industries 917,500 -------------- -------------- CHEMICAL, PLASTICS & RUBBER - 1.40% 7,523,525 BCP Crystal US Holding Corporation 526,225 -------------- Capital Specialty Plastics, Inc. 55,408 AUTOMOBILE - 10.40% Koppers, Inc. 516,353 American Tire Distributor 911,250 Lyondell Chemical Co. 545,238 Ford Motor Credit Co. 1,214,755 Nalco Co. 510,000 Fuel Systems Holding Corporation 2,537,992 Nova Chemicals Corporation 484,500 General Motors Acceptance Corporation 1,280,805 P Q Corporation 1,045,000 Goodyear Tire & Rubber Co. 1,361,500 -------------- Jason, Inc. 1,988,171 3,682,724 LIH Investors, L.P. 4,073,775 -------------- Metaldyne Corporation 1,190,100 CONSUMER PRODUCTS - 7.63% Nyloncraft, Inc. 2,491,054 ALH Fin LLC/ALH Fin Corporation 928,625 Ontario Drive & Gear Ltd. 2,499,910 Augusta Sportswear Holding Co. 2,924,485 Qualis Automotive LLC 3,171,667 Bravo Sports Holding Corporation 2,527,704 Tenneco, Inc. 987,500 Euro-Pro Corporation 341,618 Transtar Holding Company 2,558,127 G F S I, Inc. 720,000 United Components, Inc. 1,069,200 K N B Holdings Corporation 2,531,680 -------------- Momentum Holding Co. 1,277,921 27,335,806 Neff Motivation, Inc. 1,343,862 -------------- Royal Baths Manufacturing Company 1,173,654 BEVERAGE, DRUG & FOOD - 5.83% The Tranzonic Companies 3,781,610 Beta Brands Ltd. -- Walls Industries, Inc. 2,512,142 Cains Foods, L.P. 143,302 Winsloew Furniture, Inc. -- Del Monte Corporation 235,969 -------------- Dominos, Inc. 306,600 20,063,301 Eagle Pack Pet Foods, Inc. 1,597,339 -------------- Land O'Lakes, Inc. 795,000 CONTAINERS, PACKAGING Mrs. Fields Brands 630,000 & GLASS - 5.58% National Wine & Spirits, Inc. 1,272,600 Consolidated Container Corporation 720,000 Nonni's Food Company 2,224,709 Flutes, Inc. 1,558,622 PepsiAmericas, Inc. 1,966,374 Maverick Acquisition Company 1,071,383 Pinnacle Foods Group 450,563 P I I Holding Corporation 2,630,049 River Ranch Fresh Foods LLC 1,473,334 Packaging Dynamics Corporation of America 707,000 Sbarro, Inc. 1,017,500 Paradigm Packaging, Inc. 2,364,976 Specialty Foods Group, Inc. -- Pliant Corporation 929,562 Vitality Foodservice, Inc. 2,457,669 Pregis Corporation 1,040,000 Wornick Co. 746,250 Tekni-Plex, Inc. 1,491,875 -------------- Vitex Packaging, Inc. 2,153,643 15,317,209 -------------- -------------- 14,667,110 BROADCASTING & -------------- ENTERTAINMENT - 2.63% DISTRIBUTION - 3.51% CCH I Holdings LLC 1,612,500 Affina Group, Inc. 848,575 Cablevision Systems Corporation 1,012,500 Corvest Group, Inc. -- Cenveo Corporation 1,042,250 Kele and Associates, Inc. 2,769,651 Charter Communications Op LLC 251,875 Magnatech International, Inc. 1,925,302 Citadel Broadcasting Corporation 569,625 O R S Nasco Holding, Inc. 2,545,253 Liberty Media Corporation 943,621 QualServ Corporation 1,136,138 Lodgenet Entertainment Corporation 454,750 Strategic Equipment & Supply Corporation, Inc. -- Mediacom LLC 1,022,500 -------------- -------------- 9,224,919 6,909,621 -------------- -------------- ------------------------------------------------------------------------------------------------------------------------------------ 26 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (Cont.) Market Value Market Value -------------- -------------- DIVERSIFIED/CONGLOMERATE, HEALTHCARE, EDUCATION & MANUFACTURING - 6.97% CHILDCARE - 3.90% Activant Solutions, Inc. $ 138,750 A T I Acquisition Company $ 1,956,328 AmerCable, Inc. 1,519,203 American Hospice Management Holding LLC 2,744,812 Arrow Tru-Line Holdings, Inc. 2,381,335 F H S Holding LLC 2,678,374 Bombardier, Inc. 897,500 ICOS Corporation 644,062 Coining Corporation of America LLC 2,250,938 Interactive Health LLC 697,600 Dexter Magnetics Technologies, Inc. 1,213,807 MedAssist, Inc. 467,871 Douglas Dynamics LLC 595,350 Q L T, Inc. 555,750 Evans Consoles, Inc. -- Tenet Healthcare Corporation 498,125 Geo Sub Corporation 618,000 -------------- Graftech International 1,078,125 10,242,922 Great Lakes Dredge & Dock Corporation 943,950 -------------- Radiac Abrasives, Inc. 2,507,255 HOME & OFFICE FURNISHINGS, Trimas Corporation 578,125 HOUSEWARES, AND DURABLE Truck Bodies & Equipment International 3,603,089 CONSUMER PRODUCTS - 6.45% -------------- Connor Sport Court International, Inc. 1,802,907 18,325,427 H M Holding Company 2,494,072 -------------- Home Decor Holding Company 2,436,808 DIVERSIFIED/CONGLOMERATE, Justrite Manufacturing Acquisition Co. 1,640,978 SERVICE - 5.69% Monessen Holding Corporation 2,538,882 Allied Waste NA 1,022,500 Samsonite Corporation 1,047,500 Bare Escentuals, Inc. 10,860 Stanton Carpet Holding Co. 2,523,889 CapeSuccess LLC 5,862 U-Line Corporation 2,457,734 Chemed Corporation 1,167,188 -------------- Diversco, Inc./DHI Holdings, Inc. 2,505,724 16,942,770 Dwyer Group, Inc. 2,826,280 -------------- Fowler Holding, Inc. 2,548,083 LEISURE, AMUSEMENT, Interline Brands, Inc. 329,062 ENTERTAINMENT - 4.09% Iron Mountain, Inc. 1,104,938 A M C Entertainment, Inc. 888,350 Keystone North America, Inc. 289,071 Bally Total Fitness Holding Corporation 120,381 Mac-Gray Corporation 612,000 IMAX Corporation 952,500 Moss, Inc. 1,565,974 Keepsake Quilting, Inc. 1,159,401 Service Corporation International 957,500 M G M Mirage, Inc. 370,312 -------------- Majestic Star Casino LLC 511,250 14,945,042 O E D Corp/Diamond Jo Company Guarantee 1,000,000 -------------- Overton's Holding Company 1,906,346 ELECTRONICS - 1.91% Savage Sports Holding, Inc. 2,120,882 A E S Corporation 215,500 Tunica-Biloxi Gaming Authority 1,040,000 Calpine Corporation 503,750 Universal City Florida 406,250 Directed Electronics, Inc. 3,908,557 Warner Music Group 268,125 Flextronics International Ltd. 396,000 -------------- -------------- 10,743,797 5,023,807 -------------- -------------- MACHINERY - 7.16% FARMING & AGRICULTURE - 0.00% Integration Technology Systems, Inc. 1,248,333 Protein Genetics, Inc. -- Manitowoc Company, Inc. 197,000 -------------- Maxon Corporation 3,159,061 FINANCIAL SERVICES - 0.73% Morton Industrial Group, Inc. 2,578,228 Dollar Financial Group 484,377 Safety Speed Cut Manufacturing Company, Inc. 2,254,280 East River Ventures I, L.P. 8,104 Stanadyne Corporation 1,515,000 Highgate Capital LLC 2,947 Stewart & Stevenson LLC 1,215,000 Lazard LLC 781,478 Supreme Industries, Inc. 766,080 Leucadia National Corporation 656,500 Synventive Equity LLC 33,459 Victory Ventures LLC 2 Tronair, Inc. 3,323,649 -------------- Tubular Textile Machinery 2,513,013 1,933,408 -------------- -------------- 18,803,103 -------------- ------------------------------------------------------------------------------------------------------------------------------------ 27 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL CORPORATE INVESTORS September 30, 2006 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (Cont.) Market Value Market Value -------------- -------------- MEDICAL DEVICES/BIOTECH - 2.31% TECHNOLOGY - 1.85% Coeur, Inc. $ 1,263,233 C & J Spec-Rent Services, Inc. $ 4,493,590 E X C Acquisition Corporation 129,824 Sungard Data Systems 181,125 MicroGroup, Inc. 3,137,493 Unisys Corporation 177,650 OakRiver Technology, Inc. 1,536,220 -------------- -------------- 4,852,365 6,066,770 -------------- -------------- TELECOMMUNICATIONS - 3.43% MINING, STEEL, IRON & Alamosa Delaware 781,063 NON PRECIOUS METALS - 0.04% Cincinnati Bell, Inc. 1,111,000 U S S Holdings, Inc. 108,991 Intelsat Subsidiary Holding Company Ltd 1,013,750 -------------- ITC^DeltaCom, Inc. 2,768,227 NATURAL RESOURCES - 0.86% Jordan Telecom Products -- Abitibi-Consolidated, Inc. 915,000 NTL Cable PLC 1,011,850 Appleton Papers, Inc. 300,000 Rogers Wireless, Inc. 1,276,667 Rock-Tenn Co. 1,040,000 Telex Communications, Inc. 530,000 -------------- Triton P C S, Inc. 510,125 2,255,000 -------------- -------------- 9,002,682 OIL AND GAS - 1.73% -------------- Basic Energy Services 217,125 TRANSPORTATION - 1.70% Brigham Exploration Co. 682,500 NABCO, Inc. 1,235,033 Chesapeake Energy Corporation 1,062,906 Quality Distribution LLC 617,125 Clayton Williams Energy, Inc. 720,000 Tangent Rail Corporation 2,623,989 GulfMark Offshore, Inc. 567,825 -------------- North American Energy Partners 399,000 4,476,147 Offshore Logistics, Inc. 421,875 -------------- Quicksilver Resources, Inc. 473,750 UTILITIES - 2.30% -------------- Atlas Pipeline Partners 203,500 4,544,981 Dynegy Holdings, Inc. 822,650 -------------- Edison Mission Energy 506,250 PHARMACEUTICALS - 1.00% El Paso Corporation 1,089,375 CorePharma LLC 2,532,288 Inergy LP 155,250 Enzymatic Therapy, Inc. 106,250 Markwest Energy Operating Co. 446,500 -------------- N R G Energy, Inc. 173,905 2,638,538 Pacific Energy Partners 657,750 -------------- Petrohawk Energy Corporation 1,005,000 PUBLISHING/PRINTING - 1.68% Sierra Pacific Resources 635,268 Cadmus Communications Corporation 967,500 Tenaska Alabama Partners L.P. 344,738 Houghton Mifflin Co. 1,057,500 -------------- Newark Group, Inc. 824,500 6,040,186 Primedia, Inc. 907,500 -------------- Sheridan Acquisition Corporation 379,688 WASTE MANAGEMENT/ Vertis, Inc. 281,400 POLLUTION - 1.55% -------------- Terra Renewal Services, Inc. 2,935,490 4,418,088 Waste Services, Inc. 1,127,500 -------------- -------------- RETAIL STORES - 3.53% 4,062,990 Blockbuster, Inc. 435,813 -------------- Insurance Auto Auctions, Inc. 995,000 Total Corporate Restricted and Neiman Marcus Group, Inc. 1,350,000 Public Securities - 100.23% $ 263,397,753 Olympic Sales, Inc. 4,070,490 ============== Rent-A-Center, Inc. 402,000 Rent-Way, Inc. 928,000 United Rentals, Inc. 1,085,625 -------------- 9,266,928 -------------- SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ------------------------------------------------------------------------------------------------------------------------------------ 27 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL CORPORATE INVESTORS (Unaudited) 1. HISTORY MassMutual Corporate Investors (the "Trust") commenced operations in 1971 as a Delaware corporation. Pursuant to an Agreement and Plan of Reorganization dated November 14, 1985, approved by shareholders, the Trust was reorganized as a Massachusetts business trust under the laws of the Commonwealth of Massachusetts, effective November 28, 1985. The Trust is a diversified closed-end management investment company. Babson Capital Management LLC ("Babson Capital"), a wholly-owned indirect subsidiary of Massachusetts Mutual Life Insurance Company ("MassMutual"), acts as its investment adviser. The Trust's investment objective is to maintain a portfolio of securities providing a fixed yield while providing an opportunity for capital gains by investing primarily in a portfolio of privately placed below investment grade, long term corporate debt obligations with equity features, such as warrants, conversions rights, or other equity features and, occasionally, preferred stocks purchased directly from their issuers. On January 27,1998, the Board of Trustees authorized the formation of a wholly-owned subsidiary ("MMCI Subsidiary Trust") for the purpose of holding certain investments. The results of MMCI Subsidiary Trust have been included in the accompanying consolidated financial statements. Footnote 2.D below discusses the Federal tax consequences of the MMCI Subsidiary Trust. 2. SIGNIFICANT ACCOUNTING POLICIES The following is a summary of significant accounting policies followed consistently by the Trust in the preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America. A. VALUATION OF INVESTMENTS: Valuation of a security in the Trust's portfolio is made on the basis of market price whenever market quotations are readily available and all securities of the same class held by the Trust can be readily sold in such market. Nearly all securities which are acquired by the Trust directly from the issuers and shares into which such securities may be converted or which may be purchased on the exercise of warrants attached to such securities will be subject to legal or contractual delays in, or restrictions on, resale and will therefore be "restricted securities." Generally speaking, as contrasted with open-market sales of unrestricted securities which may be effected immediately if the market is adequate, absent an exemption from registration, restricted securities can be sold only in a public offering for which a registration statement is in effect under the Securities Act of 1933, as amended (the "1933 Act"). The value of restricted securities, and of any other assets for which there are no reliable market quotations, is the fair value as determined in good faith by the Trust's Board of Trustees (the "Trustees"). Each restricted security is valued by the Trustees at the time of the acquisition thereof and at least quarterly thereafter. The Trustees have established guidelines to aid in the valuation of each security. Generally, restricted securities are initially valued at cost or less at the time of acquisition by the Trust. Values greater or less than cost are used thereafter for restricted securities in appropriate circumstances. Among the factors ordinarily considered are the existence of restrictions upon the sale of the security by the Trust; an estimate of the existence and extent of a market for the security; the extent of any discount at which the security was acquired; the estimated period of time during which the security will not be freely marketable; the estimated expenses of registering or otherwise qualifying the security for public sale; estimated underwriting commissions if underwriting would be required to effect a sale; in the case of a convertible security, whether or not it would trade on the basis of its stock equivalent; in the case of a debt obligation which would trade independently of any equity equivalent, the current yields on comparable securities; the estimated amount of the floating supply of such securities available for purchase; the proportion of the issue held by the Trust; changes in the financial condition and prospects of the issuer; the existence of merger proposals or tender offers affecting the issuer; and any other factors affecting fair value, all in accordance with the Investment Company Act of 1940, as amended (the "1940 Act"). In making valuations, opinions of counsel may be relied upon as to whether or not securities are restricted securities and as to the legal requirements for public sale. When market quotations are readily available for unrestricted securities of an issuer, restricted securities of the same class are generally valued at a discount from the market price of such unrestricted securities. The Trustees, however, consider all factors in fixing any discount, including the filing of a registration statement for such securities under the 1933 Act and any other developments which are likely to increase the probability that the securities may be publicly sold by the Trust without restriction. The Trustee's meet at least once each quarter to value the Trust's portfolio securities as of the close of business on the last business day of the preceding quarter. This valuation requires the approval of a majority of the Trustees of the Trust, including a majority of the Trustees who are not interested persons of the Trust or of Babson Capital. In making valuations, the Trustees will consider reports by Babson Capital analyzing each portfolio security in accordance with the relevant factors referred to above. Babson Capital has agreed to provide such reports to the Trust at least quarterly. -------------------------------------------------------------------------------- 29 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL CORPORATE INVESTORS (CONTINUED) The consolidated financial statements include private placement restricted securities valued at $171,119,067 (65.12% of net assets) as of September 30, 2006 whose values have been estimated by the Trustees in the absence of readily ascertainable market values. Due to the inherent uncertainty of valuation, those estimated values may differ significantly from the values that would have been used had a ready market for the securities existed, and the differences could be material. The values for corporate public securities are stated at the last reported sales price or at prices based upon quotations obtained from brokers and dealers as of September 30, 2006, subject to discount where appropriate, and are approved by the Trustees. Short-term securities with more than sixty days to maturity are valued at fair value and short-term securities having a maturity of sixty days or less are valued at amortized cost which approximates market value. B. ACCOUNTING FOR INVESTMENTS: Investment transactions are accounted for on the trade date. Dividend income is recorded on the ex-dividend date. Interest income is recorded on the accrual basis, including the amortization of premiums and accretion of discounts on bonds held. The Trust does not accrue income when payment is delinquent and when management believes payment is questionable. Realized gains and losses on investment transactions and unrealized appreciation and depreciation of investments are reported for financial statement and Federal income tax purposes on the identified cost method. C. USE OF ESTIMATES: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. D. FEDERAL INCOME TAXES: The Trust has elected to be taxed as a "regulated investment company" under the Internal Revenue Code and intends to maintain this qualification and to distribute substantially all of its net taxable income to its shareholders. In any year when net long-term capital gains are realized by the Trust, management, after evaluating the prevailing economic conditions, will recommend to the Trustees either to designate the net realized long-term gains as undistributed and pay the federal capital gains taxes thereon or to distribute all or a portion of such net gains. The Trust is taxed as a regulated investment company and is therefore limited as to the amount of non-qualified income that it may receive as the result of operating a trade or business, e.g. the Trust's pro rata share of income allocable to the Trust by a partnership operating company. The Trust's violation of this limitation could result in the loss of its status as a regulated investment company, thereby subjecting all of its net income and capital gains to corporate taxes prior to distribution to its shareholders. The Trust, from time-to-time, identifies investment opportunities in the securities of entities that could cause such trade or business income to be allocable to the Trust. The MMCI Subsidiary Trust (described in Footnote 1, above) was formed in order to allow investment in such securities without adversely affecting the Trust's status as a regulated investment company. The MMCI Subsidiary Trust is not taxed as a regulated investment company. Accordingly, prior to the Trust receiving any distributions from the MMCI Subsidiary Trust, all of the MMCI Subsidiary Trust's taxable income and realized gains, including non-qualified income and realized gains, is subject to taxation at prevailing corporate tax rates. For the nine months ended September 30, 2006, the MMCI Subsidiary Trust has accrued tax expense on net realized gains of $350,255 and reduced deferred tax expense on net unrealized gains by $92,949. E. DISTRIBUTIONS TO SHAREHOLDERS: The Trust records distributions to shareholders from net investment income and net realized gains, if any, on the exdividend date. The Trust's net investment income dividend is declared four times per year, in April, July, October, and December. The Trust's net realized capital gain distribution, if any, is declared in December. 3. INVESTMENT SERVICES CONTRACT A. NEW INVESTMENT SERVICES CONTRACT: An Investment Services Contract between the Trust and Babson Capital, effective October 1, 2005 (the "New Contract"), provides for a quarterly investment advisory fee of 0.3125% of the net asset value of the Trust each quarter, which is approximately equal to 1.25% annually, with no performance adjustment. The New Contract provides that for its first eighteen months, the investment advisory fee cannot exceed the amount that Babson Capital would have been paid under the prior Investment Services Contract with the Trust dated July 1, 1988 (the "Prior Contract"). -------------------------------------------------------------------------------- 30 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL CORPORATE INVESTORS (CONTINUED) B. SERVICES: Under the New Contract with the Trust, Babson Capital agrees to use its best efforts to present to the Trust a continuing and suitable investment program consistent with the investment objectives and policies of the Trust. Babson Capital represents the Trust in any negotiations with issuers, investment banking firms, securities brokers or dealers and other institutions or investors relating to the Trust's investments. Under the New Contract, Babson Capital provides administration of the day-to-day operations of the Trust and provides the Trust with office space and office equipment, accounting and bookkeeping services, and necessary executive, clerical and secretarial personnel for the performance of the foregoing services. C. PRIOR INVESTMENT SERVICES CONTRACT ADVISORY FEE: Under the Prior Contract, the Trust paid Babson Capital a quarterly base rate (the "Base Fee Rate") of 5/16 of 1% of the value of the Trust's net assets as of the end of each fiscal quarter, approximately equivalent to 1.25% of the net asset value of the Trust on an annual basis, plus or minus a quarterly performance adjustment (the "Performance Adjustment") of up to 1/16 of 1% of net asset value, approximately equivalent to plus or minus 0.25% on an annual basis. The Performance Adjustment was based on the Trust's performance as compared to a benchmark rate of return (the "Target Rate") equal to 5.0 percentage points plus an unweighted, arithmetic average of the rates of return of the Standard & Poor's Industrials Composite (formerly called the Standard & Poor's Industrial Price Index) and the Lehman Brothers Intermediate U.S. Credit Index (formerly called the Lehman Brothers Corporate Bond Index) over a rolling three-year period (the "Measurement Period") comprising the twelve quarters ending on the last day of each quarter (the "Valuation Date"). The Standard & Poor's Industrials Composite is not readily available to the general public, Babson Capital obtained the information for this index from Factset Research Systems. The three-year annualized return for the Standard & Poor's Industrials Composite for the period ended September 30, 2006 was 11.54%. Under the prior contract, the Performance Adjustment was equal to 5% of the difference between the Trust's actual rate of return over the Measurement Period and the Target Rate. If the Trust's actual rate of return exceeded the Target Rate, the Base Fee Rate would be increased by an amount equal to the Performance Adjustment; if the Trust's actual rate of return was less than the Target Rate, the Base Fee Rate was reduced by the Performance Adjustment. Under the Prior Contract, the investment advisory fee payable by the Trust was equal to the Base Fee Rate (as adjusted by the Performance Adjustment) times the net asset value of the Trust as of the Valuation Date. Additionally, Babson Capital agreed to waive, for each quarter beginning July 1, 2004, the amount, if any, by which the investment advisory fee calculated in the manner described in the Prior Contract exceeded the sum of (i) 5/16 of 1% times the ending net asset value for that quarter plus or minus (ii) the Performance Adjustment applied against the average quarter end net assets for the Trust for the twelve-quarter period ending on such quarter. 4. SENIOR SECURED INDEBTEDNESS A. NOTE PAYABLE: MassMutual holds the Trust's $20,000,000 Senior Fixed Rate Convertible Note (the "Note") issued by the Trust in 1995. The Note, as amended, is due November 15, 2007 and accrues at 7.39% per annum. MassMutual, at its option, can convert the principal amount of the Note into common shares. The dollar amount of principal would be converted into an equivalent dollar amount of common shares based upon the average price of the common shares for ten business days prior to the notice of conversion. For the nine months ended September 30, 2006, the Trust incurred total interest expense on the Note of $1,109,645. The Trust may redeem the Note, in whole or in part, at the principal amount proposed to be redeemed together with the accrued and unpaid interest thereon through the redemption date plus the Make Whole Premium. The Make Whole Premium equals the excess of (i) the present value of the scheduled payments of principal and interest which the Trust would have paid but for the proposed redemption, discounted at the rate of interest of U.S. Treasury obligations whose maturity approximates that of the Note plus 0.50% over (ii) the principal of the Note proposed to be redeemed. B. REVOLVING CREDIT AGREEMENT: The Trust entered into a Revolving Credit Agreement (the "Revolver") with The Royal Bank of Scotland PLC as of May 31, 2005 (the "Agent Bank"), in the principal amount of $25,000,000, maturing May 31, 2008. The Revolver bears interest payable in arrears at a per annum rate that varies depending upon whether the Trust requests a Base Rate Loan or LIBOR Rate Loan. Interest on Base Rate Loans equals the higher of: (i) the annual "Base Rate" as set periodically by the Agent Bank and (ii) the most recent Federal Funds Effective Rate plus .50% per annum. Per annum interest on LIBOR Rate Loans equals .37% plus the London Inter Bank Offered Rate ("LIBOR") rate, divided by 1 minus the LIBOR Reserve Rate. The Trust also incurs expense on the undrawn portion of the total Revolver at a rate of .15% per annum. As of September 30, 2006, there was no outstanding amount against the Revolver. For the nine months ended September 30, 2006, the Trust incurred total expense on the Revolver of $28,048 related to the undrawn portion. -------------------------------------------------------------------------------- 31 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL CORPORATE INVESTORS (CONTINUED) 5. PURCHASES AND SALES OF INVESTMENTS For the nine months ended 9/30/2006 Cost of Proceeds from Investments Sales or Acquired Maturities ----------- ----------- Corporate restricted securities $55,990,374 $36,525,550 Corporate public securities 17,712,932 30,715,358 The aggregate cost of investments was substantially the same for financial reporting and federal income tax purposes as of September 30, 2006. The net unrealized depreciation of investments for financial reporting and federal tax purposes as of September 30, 2006 is $14,855 and consists of $22,811,678 appreciation and $22,826,533 depreciation. Net unrealized appreciation of investments on the Statement of Assets and Liabilities reflects the balance of a tax accrual of $182,622 on net unrealized gains on the MMCI Subsidiary Trust. 6. QUARTERLY RESULTS OF INVESTMENT OPERATIONS March 31, 2006 Amount Per Share ----------- ----------- Investment income $ 6,350,324 Net investment income $ 5,061,431 $ 0.56 Net realized and unrealized gain $ 7,598,686 $ 0.84 on investments (net of taxes) June 30, 2006 Amount Per Share ----------- ----------- Investment income $ 6,202,668 Net investment income $ 4,891,333 $ 0.53 Net realized and unrealized gain $ 6,204,073 $ 0.68 on investments (net of taxes) September 30, 2006 Amount Per Share ----------- ----------- Investment income $ 6,242,239 Net investment income $ 4,942,357 $ 0.55 Net realized and unrealized gain $ 4,648,575 $ 0.51 on investments (net of taxes) -------------------------------------------------------------------------------- 32 TRUSTEES OFFICERS William J. Barrett Roger W. Crandall Chairman Donald E. Benson* Clifford M. Noreen President Michael H. Brown James M. Roy Vice President & Roger W. Crandall Chief Financial Officer Donald Glickman Rodney J. Dillman Vice President & Martin T. Hart* Secretary Robert E. Joyal Jill A. Fricchione Vice President Corine T. Norgaard* Michael P. Hermsen Vice President Mary Wilson Kibbe Vice President Michael L. Klofas Vice President Richard E. Spencer, II Vice President Ronald S. Talaia Treasurer John T. Davitt, Jr. Comptroller Melissa M. LaGrant Chief Compliance Officer *Member of the Audit Committee -------------------------------------------------------------------------------- DIVIDEND REINVESTMENT AND SHARE PURCHASE PLAN MassMutual Corporate Investors offers a Dividend Reinvestment and Share Purchase Plan. The Plan provides a simple way for shareholders to add to their holdings in the Trust through the receipt of dividend shares issued by the Trust or through the reinvestment of cash dividends in Trust shares purchased in the open market. A shareholder may join the Plan by filling out and mailing an authorization card to Shareholder Financial Services, Inc., the Transfer Agent. Participating shareholders will continue to participate until they notify the Transfer Agent, in writing, of their desire to terminate participation. Unless a shareholder elects to participate in the Plan, he or she will, in effect, have elected to receive dividends and distributions in cash. Participating shareholders may also make additional contributions to the Plan from their own funds. Such contributions may be made by personal check or other means in an amount not less than $10 nor more than $5,000 per quarter. Whenever the Trust declares a dividend payable in cash or shares, the Transfer Agent, acting on behalf of each participating shareholder, will take the dividend in shares only if the net asset value is lower than the market price plus an estimated brokerage commission as of the close of business on the valuation day. The valuation day is the last day preceding the day of dividend payment. When the dividend is to be taken in shares, the number of shares to be received is determined by dividing the cash dividend by the net asset value as of the close of business on the valuation date or, if greater than net asset value, 95% of the closing share price. If the net asset value of the shares is higher than the market value plus an estimated commission, the Transfer Agent, consistent with obtaining the best price and execution, will buy shares on the open market at current prices promptly after the dividend payment date. The reinvestment of dividends does not, in any way, relieve participating shareholders of any federal, state or local tax. For federal income tax purposes, the amount reportable in respect of a dividend received in newly issued shares of the Trust will be the fair market value of the shares received, which will be reportable as ordinary income and/or capital gains. As compensation for its services, the Transfer Agent receives a fee of 5% of any dividend and cash contribution (in no event in excess of $2.50 per distribution per shareholder.) Any questions regarding the Plan should be addressed to Shareholder Financial Services, Inc., Agent for MassMutual Corporate Investors' Dividend Reinvestment and Share Purchase Plan, P.O. Box 173673, Denver CO 80217-3673. [LOGO] MASSMUTUAL CORPORATE INVESTORS DB1039 1106