FORM OF COMMON STOCK CERTIFICATE



 Exhibit 4.1 
  






 
 NUMBER 
OT 
OBALON 
SHARES 
INCORPORATED UNDER THE 
LAWS OF THE STATE 
OF DELAWARE 
CUSIP 67424L 10 0 
SEE REVERSE FOR CERTAIN DEFINITIONS 
This certifies that 
is the record holder of 
FULLY PAID AND NONASSESSABLE SHARES OF COMMON STOCK $0.001 PAR VALUE
PER SHARE, OF 
Obalon Therapeutics, Inc. 
transferable on the books of the
corporation in person or by duly authorized attorney upon surrender of this Certificate properly endorsed. This Certificate is not valid until countersigned by the Transfer Agent and registered by the Registrar. 
WITNESS the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers. 
Dated: 
President and 
Chief Executive Officer 
Secretary 
OBALON THERAPEUTICS, INC. 
CORPORATE 
SEAL 
JANUARY 2, 2008 
DELAWARE 
COUNTERSIGNED AND REGISTERED: 
AMERICAN STOCK TRANSFER & TRUST COMPANY, LLC 
(BROOKLYN, NY) TRANSFER AGENT 
AND REGISTRAR 
BY: 
AUTHORIZED SIGNATURE 
HERITAGE BANKNOTE 







 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’s Secretary at the principal office of the Corporation. 
 KEEP THIS CERTIFICATE IN A
SAFE PLACE. IF IT IS LOST, STOLEN,OR DESTROYED THE CORPORATION WILL REQUIRE A BOND INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE. 

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
	TEN ENT	 	–	 	as tenants by the entireties
	JT TEN	 	–	 	as joint tenants with right of survivorship and not as tenants in common
	COM PROP	 	–	 	as community property





											
	UNIF GIFT MIN ACT	 	–	 	 	 	Custodian	 	 
		 		 	(Cust)	 		 	(Minor)
		 		 	under Uniform Gifts to Minors
		 		 	Act	 	 
		 		 		 	(State)    


													
	UNIF TRF MIN ACT  	 	–	 	  
	 	Custodian (until age	 	 	 	)
		 		 	(Cust)	 		 		 	


					
		 	  
	 	under Uniform Transfers
		 	(Minor)	 	


					
		 	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 capital stock represented by within Certificate, and do hereby irrevocably constitute and appoint 

 

			
	  
	 	attorney-in-fact

 to transfer the said stock on the books of the within named Corporation with full power of the substitution in the premises.

  

			
	Dated	 	  


  

							
		 	X	 	  

			
		 	X	 	  

	Signature(s) Guaranteed:	 		 	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.

  

			
	By	 	 
	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. GUARANTEES BY A NOTARY PUBLIC ARE NOT ACCEPTABLE. SIGNATURE GUARANTEES MUST NOT BE DATED.