Cowen (COWN) 10-Q 2012 Q1 Quarterly report

Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Cowen Group, Inc. (the "Company") on Form 10-Q for the quarter ended March 31, 2012, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), each of the undersigned officers of the Company certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to such officer's knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	May 8, 2012	/s/ PETER A. COHEN
		Name:  Peter A. Cohen Title:    Chief Executive Officer and President              (principal executive officer)
		/s/ STEPHEN A. LASOTA
		Name:  Stephen A. Lasota Title:    Chief Financial Officer (principal financial              officer and principal accounting officer)