Exhibit 4.1

016570| 003590| 127C| RESTRICTED||4|057-423
COMMON STOCK
PAR VALUE $.001
COMMON STOCK
THIS CERTIFICATE IS TRANSFERABLE IN CANTON, MA, JERSEY CITY, NJ AND
COLLEGE STATION, TX
Certificate Number
ZQ 000000
Shares
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ARIAD PHARMACEUTICALS, INC.
INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE
THIS CERTIFIES THAT
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CUSIP 04033A 10 0
SEE REVERSE FOR CERTAIN DEFINITIONS
is the owner of
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FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK, $.001 PAR VALUE, OF
ARIAD Pharmaceuticals, Inc transferable only on the books of the Corporation by the holder hereof in person or by duly authorized attorney upon surrender of this certificate properly endorsed. This certificate and the shares of Common Stock represented hereby are received and held subject to the laws of the State of Delaware and to the Certificate of Incorporation and the Bylaws of the Corporation, each as from time to time amended, and the owner of this certificate by accepting the same expressly assents thereto This certificate is not valid unless countersigned by the Transfer Agent.
IN WITNESS WHEREOF, the Corporation has caused this certificate to be signed by the facsimile signatures of its duly authorized officers and a facsimile of its corporate seal to be hereunto affixed.
DATED <<Month Day, Year>>
COUNTERSIGNED AND REGISTERED:
COMPUTERSHARE TRUST COMPANY, N .A
TRANSFER AGENT AND REGISTRAR,
Chairman and Chief Executive Officer
Senior Vice President and Chief Financial Officer
ARIAD PHARMACEUTICALS, INC.
CORPORATE SEAL 1991
DELAWARE
*
By
Senior Vice President and Chief Financial Officer
AUTHORIZED SIGNATURE
PO BOX 43004, Providence, RI 02940-3004
MR A SAMPLE
DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4
CUSIP XXXXXX XX X
Holder ID XXXXXXXXXX
Insurance Value 1,000,000.00
Number of Shares 123456
DTC 12345678 123456789012345
Certificate Numbers Num/No. Denom. Total.
1234567890/1234567890 1 1 1 1234567890/1234567890 2 2 2 1234567890/1234567890 3 3 3 1234567890/1234567890 4 4 4 1234567890/1234567890 5 5 5 1234567890/1234567890 6 6 6
Total Transaction 7
1234567

This certificate also evidences and entitles the holder hereof to certain Rights as set forth in a Rights Agreement dated as of October 31, 2013 (as it may be amended from time to time (the “Rights Agreement”)), between ARIAD PHARMACEUTICALS, INC. (the “Company”) and COMPUTERSHARE TRUST COMPANY, N.A., as Rights Agent (the “Rights Agent”), the terms of which (including restrictions on the transfer of such Rights) are hereby incorporated herein by reference and a copy of which is on file at the principal executive offices of the Company. Under certain circumstances, as set forth in the Rights Agreement, such Rights shall be evidenced by separate certificates and shall no longer be evidenced by this certificate. The Company shall mail to the holder of this certificate a copy of the Rights Agreement without charge after receipt of a written request therefor. RIGHTS THAT ARE OR WERE, AT ANY TIME ON OR AFTER THE DATE AN ACQUIRING PERSON BECOMES SUCH, BENEFICIALLY OWNED BY SUCH ACQUIRING PERSON OR ANY AFFILIATE OR ASSOCIATE OF SUCH ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT) AND BY ANY SUBSEQUENT HOLDER OF SUCH RIGHTS ARE NULL AND VOID AND NONTRANSFERABLE.
ABBREVIATIONS
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. . . ). . . . . . . . . . . and not as tenants in common (Cust) (Minor) under Uniform Transfers to Minors Act. . . . . . . . . .
(State)
Additional abbreviations may also be used though not in the above list.
ASSIGNMENT
PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE
For value received, ____________________________hereby sell, assign and transfer unto
(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE)
Shares of the common stock represented by the within Certificate, and do hereby irrevocably constitute and appoint _______________________________________________________________________________________________________________________ Attorney to transfer the said stock on the books of the within-named Corporation with full power of substitution in the premises.
Dated: __________________________________________20__________________ 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.
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.
The IRS requires that we report the cost basis of certain shares acquired after January 1, 2011. If your shares were covered by the legislation and you have sold or transferred the shares and requested a specific cost basis calculation method, we have processed as requested. If you did not specify a cost basis calculation method, we have defaulted to the first in, first out (FIFO) method. Please visit our website or consult your tax advisor if you need additional information about cost basis.
If you do not keep in contact with us or do not have any activity in your account for the time periods specified by state law, your property could become subject to state unclaimed property laws and transferred to the appropriate state.
SECURITY INSTRUCTIONS
THIS IS WATERMARKED PAPER DO NOT ACCEPT WITHOUT NOTING
WATERMARK HOLD TO LIGHT TO VERIFY WATERMARK