EX-4.1



 Exhibit 4.1 

 
 



 
 Number AB 
 Shares 
 Ambit 

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE 

SEE REVERSE FOR CERTAIN DEFINITIONS 
 CUSIP 02318X 10 0 
 THIS CERTIFIES THAT 

is the owner of 
 FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF THE PAR VALUE OF $0.001 PER SHARE OF 
 AMBIT BIOSCIENCES CORPORATION 
 Transferable of 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 is not valid until 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: 
 Chief Financial Officer 

Ambit Biosciences, Corp. 
 CORPORATE 
 SEAL 

MAY 17, 2000 
 DELAWARE 
 President and Chief Executive Officer

 COUNTERSIGNED AND REGISTERED: 
 AMERICAN STOCK TRANSFER AND TRUST COMPANY, LLC 

(Brooklyn, NY) 
 TRANSFER AGENT AND REGISTRAR 
 BY: 

AUTHORIZED SIGNATURE 

	
	








 The Corporation shall 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 of the Corporation or series thereof and the qualifications, limitations or restrictions of such preferences and/or rights. Such requests
shall be made to the Corporation. 
 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 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,	 	  


  

			
		 	  

	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.


  

	
	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.

  

					
	 ABnote North America

711 ARMSTRONG LANE
 COLUMBIA, TENNESSEE 38401
 (931) 388-3003
	 		  	  

PROOF OF: APRIL 18, 2013
 AMBIT BIOSCIENCES CORP.
 WO- 6858 BACK

	HOLLY
GRONER    931-490-7660	 		  	OPERATOR: MR
	 	 		  	NEW

 PLEASE INITIAL THE APPROPRIATE SELECTION FOR THIS PROOF:
 ̈ OK AS IS  ̈ OK WITH CHANGES  ̈ MAKE CHANGES AND SEND ANOTHER
PROOF 
 NOTE: TEXT RECEIVED BY MODEM OR E-MAIL IS NOT PROOFREAD WORD FOR WORD.