EX-4.1



 Exhibit 4.1 
  





 
 CC THIS CERTIFIES THAT IS THE RECORD HOLDER OF VICE PRESIDENT, FINANCE AND ADMINISTRATION AND SECRETARY FULLY PAID AND NON-ASSESSABLE
SHARES OF THE COMMON STOCK, $0.0001 PAR VALUE PER SHARE, OF COUNTERSIGNED AND REGISTERED: AMERICAN STOCK TRANSFER & TRUST COMPANY, LLC (Brooklyn, New York) TRANSFER AGENT AND REGISTRAR By: AUTHORIZED SIGNATURE CELLADON CORPORATION 
Dated: SEE REVERSE FOR CERTAIN DEFINITIONS CUSIP 15117E 10 INCORPORATED UNDER THE LAWS 7 OF THE STATE OF DELAWARE transferable 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 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. CELLADON CORPORATION COMMON STOCK DELAWARE SEAL 2012 CORPORATE Celladon Corporation 
PRESIDENT AND CHIEF
EXECUTIVE OFFICER Specimen 







 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(s), assign(s) and transfer(s) 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 the common stock represented by the within Certificate, and do(es) 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 WHATSOEVER.
			
	 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.