Edgar Filing: OSCIENT PHARMACEUTICALS CORP

Ownership Submission

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

Â HIGHBRIDGE CAPITAL MANAGEMENT LLC

2. Date of Event Requiring Statement (Month/Day/Year)
04/26/2007

3. Issuer Name and Ticker or Trading Symbol
OSCIENT PHARMACEUTICALS CORP [OSCI]

(Last)

(First)

(Middle)

9 WEST 57TH STREET,Â 27TH FLOOR

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

_____ Director	__X__ 10% Owner
_____ Officer (give title below)	_____ Other (specify below)

5. If Amendment, Date Original Filed(Month/Day/Year)

(Street)

NEW YORK,Â NYÂ 10019

6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person

(City)

(State)

(Zip)

Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Shares of Common Stock, par value $0.10	7,421	I ⁽¹⁾ ⁽²⁾	See footnotes ⁽¹⁾ ⁽²⁾

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
3.50% Convertible Senior Notes	05/01/2007	04/14/2011	Common Stock	1,710,889 ⁽²⁾ ⁽³⁾	$ 13.5	I ⁽²⁾ ⁽³⁾	See footnotes ⁽²⁾ ⁽³⁾
Warrants	03/05/2002	06/04/2008	Common Stock	58,891 ⁽⁴⁾ ⁽⁵⁾	$ 24.53	I ⁽⁴⁾ ⁽⁵⁾	See footnotes ⁽⁴⁾ ⁽⁵⁾
Warrants	04/14/2004	10/15/2008	Common Stock	25,000 ⁽⁵⁾ ⁽⁶⁾	$ 27.84	I ⁽⁵⁾ ⁽⁶⁾	See footnotes ⁽⁵⁾ ⁽⁶⁾
Warrants	04/05/2006	11/04/2011	Common Stock	161,917 ⁽²⁾ ⁽⁷⁾	$ 17.76	I ⁽²⁾ ⁽⁷⁾	See footnotes ⁽²⁾ ⁽⁷⁾

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
HIGHBRIDGE CAPITAL MANAGEMENT LLC 9 WEST 57TH STREET 27TH FLOOR NEW YORK,Â NYÂ 10019	Â	Â X	Â	Â
Highbridge International LLC THE CAYMAN CORPORATE CENTER, 4TH FLOOR 27 HOSPITAL ROAD GRAND CAYMAN, CAYMAN ISLANDS,Â E9Â 00000	Â	Â X	Â	Â
SMITHFIELD FIDUCIARY LLC THE CAYMAN CORPORATE CENTER, 4TH FLOOR 27 HOSPITAL ROAD GRAND CAYMAN, CAYMAN ISLANDS,Â E9Â 00000	Â	Â X	Â	Â
Dubin Glenn C/O HIGHBRIDGE CAPITAL MANAGEMENT, LLC 9 WEST 57TH STREET, 27TH FLOOR NEW YORK,Â NYÂ 10019	Â	Â X	Â	Â
Swieca Henry C/O HIGHBRIDGE CAPITAL MANAGEMENT, LLC 9 WEST 57TH STREET, 27TH FLOOR NEW YORK,Â NYÂ 10019	Â	Â X	Â	Â

Signatures

By: /s/ Carolyn Rubin, Managing Director		05/15/2007
^**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	7,421 shares of Common Stock are held by Highbridge International LLC.
(2)	Highbridge Capital Management, LLC is the trading manager of Highbridge International LLC. Glenn Dubin is a Co-Chief Executive Officer of Highbridge Capital Management, LLC. Henry Swieca is a Co-Chief Executive Officer of Highbridge Capital Management, LLC. Each of the Reporting Persons disclaims beneficial ownership of the shares of Common Stock owned by another Reporting Person to the extent such beneficial ownership exceeds such Reporting Person's pecuniary interest.
(3)	1,710,889 shares of Common Stock are issuable to Highbridge International LLC upon conversion of the 3.50% Convertible Senior Notes.
(4)	58,891 shares of Common Stock are issuable to Smithfield Fiduciary LLC upon exercise of the Warrants.
(5)	Smithfield Fiduciary LLC is a wholly-owned subsidiary of Highbridge International LLC. Highbridge Capital Management, LLC is the trading manager of Highbridge International LLC and Smithfield Fiduciary LLC. Glenn Dubin is a Co-Chief Executive Officer of Highbridge Capital Management, LLC. Henry Swieca is a Co-Chief Executive Officer of Highbridge Capital Management, LLC. Each of the Reporting Persons disclaims beneficial ownership of the shares of Common Stock owned by another Reporting Person to the extent such beneficial ownership exceeds such Reporting Person's pecuniary interest.
(6)	25,000 shares of Common Stock are issuable to Smithfield Fiduciary LLC upon exercise of the Warrants.
(7)	161,917 shares of Common Stock are issuable to Highbridge International LLC upon exercise of the Warrants.

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