EX-4.1



 Exhibit 4.1 
  






 
 10431 
COMMON STOCK

MAT 
SEE REVERSE FOR 
CERTAIN DEFINITIONS 
MATEON 
THERAPEUTICS 
MATEON THERAPEUTICS, INC. 
(A Delaware Corporation) 
COMMON STOCK 
CUSIP 57667K 10 9 
THIS CERTIFIES THAT 
SPECIMEN 
is the owner of 
FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK, PAR VALUE $.01 PER SHARE, OF 
MATEON
THERAPEUTICS, INC. 
(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 and the shares represented hereby are issued and shall be held subject to all of the provisions of the Restated Certificate of Incorporation of the Company and all amendments thereto to all of
which the holder by the acceptance hereof assents. This Certificate is not valid unless countersigned and registered by the Transfer Agent and Registrar. 
WITNESS
the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers. 
DATED 
SECRETARY 
SECURITY-COLUMBIAN 
UNITED STATES BANKNOTE COMPANY 1960 
MATEON THERAPEUTICS, INC. 
CORPORATE 
SEAL 
1992 
DELAWARE 
MATEON THERAPEUTICS, INC. 
PRESIDENT AND CHIEF EXECUTIVE OFFICER 
COUNTERSIGNED AND REGISTERED: 
AMERICAN STOCK TRANSFER & TRUST COMPANY, LLC 
(Brooklyn, NY) 
TRANSFER AGENT 
AND REGISTRAR 
By 
AUTHORIZED SIGNATURE 







 MATEON THERAPEUTICS, INC. 

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
                  
	    TEN ENT	  	– as tenants by the entireties	  	                                      
      (Cust)                         (Minor)
	    JT TEN	  	 – as joint tenants with right of

   survivorship and not as tenants

   in common
	  	                                      
  under Uniform Gifts to Minors
	  	  	                                      
  Act                   
	  	  	                                      
            (State)

 Additional abbreviations may also be used though not in the above list. 

For Value
Received,                                        
     hereby sell, assign, and transfer unto 
  

			
	PLEASE INSERT SOCIAL SECURITY OR OTHER	 	
	IDENTIFYING NUMBER OF ASSIGNEE	 	
	 	
	 	 	

  
  

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

 
  
  

 
  
  

			
	  
	 	Shares

 of Common Stock represented by the within Certificate, and do hereby irrevocably constitute and appoint 

 

			
	  
	 	Attorney

 to transfer the said shares of Common Stock on the books of the Company with full power of substitution in the premises. 

 

			
	Dated	 	  


  

					
		 	  

		 	NOTICE:	 	THE SIGNATURE(S) TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME(S) AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER.
	 	 

  

	
	Signature(s) Guaranteed:
	
	  

	THE SIGNATURE(S) MUST 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.

 KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN, MUTILATED OR DESTROYED, THE CORPORATION WILL REQUIRE A BOND
OF INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE.