Exhibit 4.1


 




	
  

  	
  By AUTHORIZED
  SIGNATURE THIS CERTIFIES THAT is the owner of CUSIP DATED COUNTERSIGNED AND
  REGISTERED: COMPUTERSHARE TRUST COMPANY, N.A. TRANSFER AGENT AND REGISTRAR,
  Fully-Paid and Non Assessable Shares of Class A Common Stock, $0.01 par value,
  of Cowen Group, Inc. (hereinafter called the “Company”), transferable on the
  books of the Company by the holder hereof in person or by duly authorized
  attorney, upon surrender of this certificate properly endorsed. This
  certificate is not valid until countersigned by the Transfer Agent and
  registered by the Registrar. Witness, the seal of the Company and the
  signatures of its duly authorized officers. CLASS A COMMON STOCK PAR VALUE
  $0.01 CLASS A COMMON STOCK THIS CERTIFICATE IS TRANSFERABLE IN CANTON, MA AND
  NEW YORK, NY SEE REVERSE FOR CERTAIN DEFINITIONS Certificate Number Shares
  COWEN GROUP, INC. INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE
  016570| 003590|127C|RESTRICTED||4|057-423 223622 10 1 <<Month Day,
  Year>> * * 600620* * * * * * * * * 600620* * * * * * * * * 600620* * *
  * * * * * * 600620* * * * * * * * * 600620* * ** Mr. Alexander David Sample
  **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
  Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
  David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
  **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
  Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
  David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
  **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
  Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
  David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
  **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
  Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
  David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
  **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
  Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
  David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
  **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
  Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
  David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
  **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
  Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
  David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
  **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.
  Sample **** Mr. Sample **600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares***
  *600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****
  600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****6
  00620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****60
  0620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600
  620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares***600620**Shares****600620**Shares****60062
  0**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620
  **Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620*
  *Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**
  Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**S
  hares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Shares****600620**Sh
  * * * SIX HUNDRED THOUSAND SIX HUNDRED AND TWENTY* * * MR. SAMPLE & MRS.
  SAMPLE & MR. SAMPLE & MRS. SAMPLE ZQ 000000 Certificate Numbers
  1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890
  1234567890/1234567890 1234567890/1234567890 Total Transaction Num/No. 123456
  Denom. 123456 Total 1234567 MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2 ADD
  3 ADD 4 PO BOX 43004, Providence, RI 02940-3004 CUSIP XXXXXX XX X Holder ID
  XXXXXXXXXX Insurance Value 1,000,000.00 Number of Shares 123456 DTC 12345678
  123456789012345 

  






 


 












	
  

  	
  For value
  received, hereby sell, assign and transfer unto shares Attorney Dated: 20
  Signature: Signature: Notice: The signature to this assignment must
  correspond with the name as written upon the face of the certificate, in
  every particular, without alteration or enlargement, or any change whatever.
  PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE (PLEASE
  PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE)
  of the capital stock represented by the Certificate, and do hereby
  irrevocably constitute and appoint to transfer the said stock on the books of
  the Corporation with full power of substitution in the premises. . COWEN
  GROUP, INC. The Corporation will furnish without charge to each stockholder
  who so requests a statement of the powers, designations, preferences and
  relative, participating, optional or other special rights of each class of
  stock or series thereof and the qualifications, limitations or restrictions
  of such preferences and/or rights. Signature(s) Guaranteed: Medallion
  Guarantee Stamp THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE
  GUARANTOR INSTITUTION (Banks, Stockbrokers, Savings and Loan Associations and
  Credit Unions) WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION
  PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15. The
  following abbreviations, when used in the inscription on the face of this
  certificate, shall be construed as though they were written out in full
  according to applicable laws or regulations: TEN COM - as tenants in common UNIF GIFT MIN ACT - Custodian (Cust)
  (Minor) TEN ENT - as tenants by the entireties
  under Uniform Gifts to Minors Act (State) JT TEN - as joint tenants with
  right of survivorship UNIF  TRF
  MIN ACT - Custodian (until age ) (Cust) under
  Uniform Transfers to Minors Act (Minor) (State) Additional abbreviations may
  also be used though not in the above list.