FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN 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 * STRAUSS THOMAS W   2. Issuer Name and Ticker or Trading Symbol COWEN GROUP, INC. [COWN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner __X__ Officer (give title below) _____ Other (specify below) CEO/PRES. RAMIUS ALT. SOL. LLC (Last) (First) (Middle) C/O COWEN GROUP, INC., 599 LEXINGTON AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 11/02/2009 (Street) NEW YORK, NY 10022 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 11/02/2009   A   2,874,001 A (1) (2) 2,874,001 I See Footnote (1) (2)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
STRAUSS THOMAS W C/O COWEN GROUP, INC. 599 LEXINGTON AVENUE NEW YORK, NY 10022		X	CEO/PRES. RAMIUS ALT. SOL. LLC

Signatures

/s/ Thomas W. Strauss		11/02/2009
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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)	Upon consummation of the transactions (the "Transactions") contemplated by the Transaction Agreement and Agreement and Plan of Merger, dated as of June 3, 2009, by and among Cowen Holdings, Inc. (f/k/a Cowen Group, Inc.), Cowen Group, Inc. (f/k/a/ LexingtonPark Parent Corp.), Lexington Merger Corp., Ramius LLC (f/k/a Park Exchange LLC) and RCG Holdings LLC (f/k/a Ramius LLC) ("RCG"), 37,536,826 shares of Class A Common Stock were issued to RCG. The Reporting Person is a member of RCG and may be deemed to have a pecuniary interest in 2,874,001 shares of Class A Common Stock that were acquired by RCG in the Transactions, including 1,817,799 shares that are held by RCG and allocated to the Reporting Person in connection with his ownership interest in RCG and 1,056,202 shares that are held by RCG and allocated to an entity controlled by the Reporting Person in connection with its ownership interest in RCG.
(2)	The Reporting Person's acquisition of a pecuniary interest in these shares was pursuant to an exempt transaction pursuant to Rule 16b-3 under the Securities Exchange Act of 1934, as amended.

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