EX-4.1




	
	 Exhibit 4.1
  








 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 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. 
COMMON STOCK

PAR VALUE $.001 
COMMON STOCK 
SEE REVERSE FOR CERTAIN DEFINITIONS 
Certificate 
Number 
Shares 
. 
ARIAD PHARMACEUTICALS, INC. 
INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE 
President and Chief Executive Officer

Executive Vice President, Chief Financial Officer and Treasurer 
By

AUTHORIZED SIGNATURE 
1991 
DELAWARE 
ARIAD PHARMACEUTICALS, INC. 
CORPORATE 
THIS CERTIFICATE IS TRANSFERABLE 
IN CANTON, MA, JERSEY CITY, NJ AND 
COLLEGE STATION, TX 
ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS# 
04033A 10 0 
DD-MMM-YYYY 
* * 000000* * * * * * * * * * * * * * * * * * 
* * * 000000* * * * * * * * * * * * * * * * * 
* * * * 000000* * * * * * * * * * * * * * * *

* * * * * 000000* * * * * * * * * * * * * * * 
* * * * * * 000000* * * * * * *
* * * * * * * 
** 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

**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 
***ZERO HUNDRED THOUSAND 
ZERO HUNDRED AND ZERO*** 
MR. SAMPLE & MRS. SAMPLE & 
MR. SAMPLE & MRS. SAMPLE 
ZQ00000000 
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 







  
  

	
	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  

TENENT
	 	 -  as tenants in common
  

-  as tenants by the entireties
  
	  	 UNIF GIFT MIN ACT- . . . . . . . . . .Custodian . . . . . . . . . . . . . . .

                          
                  (Cust)
                                (Minor)

                          
          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 abbrevitions 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.