EX-4.1

ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS#
COMMON STOCK
PAR VALUE $.001
ARIAD
COMMON STOCK
THIS CERTIFICATE IS TRANSFERABLE IN CANTON, MA, JERSEY CITY, NJ AND COLLEGE STATION, TX
Certificate Number
ZQ00000000
THIS CERTIFIES THAT
ARIAD PHARMACEUTICALS, INC. INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE
MR. SAMPLE & MRS. SAMPLE & MR. SAMPLE & MRS. 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. Alexander David Sample **** Mr. Sample **** Mr. Sample
is the owner of
***ZERO HUNDRED THOUSAND ZERO HUNDRED AND ZERO***
**000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares*** *000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0 00000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00 0000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000 000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0000 00**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00000 0**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000 **Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000* *Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000** Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**S
Shares
* * 000000* * * * * * * * * * * * * * * * * *
* * * 000000* * * * * * * * * * * * * * * * *
* * * * 000000* * * * * * * * * * * * * * * *
* * * * * 000000* * * * * * * * * * * * * * *
* * * * * * 000000* * * * * * * * * * * * * *
CUSIP 04033A 10 0
SEE REVERSE FOR CERTAIN DEFINITIONS
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.
President and Chief Executive Officer
Executive Vice President, Chief Financial Officer and Treasurer
ARIAD PHARMACEUTICALS, INC.
CORPORATE
SEAL
1991
DELAWARE
DATED DD-MMM-YYYY
COUNTERSIGNED AND REGISTERED:
COMPUTERSHARE TRUST COMPANY, N.A.
TRANSFER AGENT AND REGISTRAR,
By
AUTHORIZED SIGNATURE
SECURITY INSTRUCTIONS ON REVERSE
1234567
Printed by DATA BUSINESS FORMS
ARIAD
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

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 and not as tenants in common	UNIF TRF MIN ACT	Custodian (until age )
			(Cust) (Minor)
			under Uniform Transfers to Minors Act
			(State)
	Additional abbreviations may also be used though not in the above list.

(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP CODE, OF ASSIGNEE)

of the common stock ordinary shares represented by the within Certificate, and do hereby Irrevocably constitute and appoint

to transfer the said stock on the books of the within named Company 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.


		PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE
For value received, hereby sell, assign and transfer unto


		Attorney