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Exhibit 4.2    
    


[SPECIMEN
COMMON STOCK CERTIFICATE] 



	NUMBER

                  	 	            SHARES




THIRD
WAVE ACQUISITION CORP.

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

COMMON STOCK 



	 	 	SEE REVERSE FOR

CERTAIN DEFINITIONS
	

 	
 	

CUSIP:             





        THIS
CERTIFIES THAT
                                         
                                


        IS
THE OWNER OF
                                         
                                          
                       
 


FULLY
PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $0.001 EACH

OF THE COMMON STOCK OF 


THIRD
WAVE ACQUISITION CORP. 


TRANSFERABLE
ON THE BOOKS OF THE COMPANY IN PERSON OR BY DULY AUTHORIZED ATTORNEY UPON SURRENDER OF THIS CERTIFICATE PROPERLY ENDORSED. THIS CERTIFICATE IS NOT VALID UNLESS COUNTERSIGNED BY THE
TRANSFER AGENT AND REGISTERED BY THE REGISTRAR. WITNESS THE SEAL OF THE COMPANY AND THE FACSIMILE SIGNATURES OF ITS DULY AUTHORIZED OFFICERS. 



DATED: 


THIRD
WAVE ACQUISITION CORP.

CORPORATE

DELAWARE

SEAL

2007 


  




	 	    
 President	 	 	    
 Secretary
	

 	

    
 Transfer Agent	
 	

 	

 




1







 

        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	
 	

                                         
       under Uniform Gifts to
	 	right of survivorship and	 	                                        
        Minors Act                   
	 	not as tenants in common	 	(State)





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


THIRD
WAVE ACQUISITION CORP. 


        Third
Wave Acquisition Corp. (the "Company") will furnish without charge to each stockholder who so requests the powers, designations, preferences and relative, participating, optional
or other special rights of each class of stock or series thereof of the Company and the qualifications, limitations, or restrictions of such preferences and/or rights. This certificate and the shares
represented hereby are issued and shall be held subject to all the provisions of the Amended and Restated Certificate of Incorporation of the Company and all amendments thereto and resolutions of the
Board of Directors providing for the issue of shares of Preferred Stock (copies of which may be obtained from the secretary of the Company), to all of which the holder of this certificate by
acceptance hereof assents. 


        FOR
VALUE RECEIVED,
                                         
          HEREBY SELLS, ASSIGNS AND TRANSFERS 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 THE WITHIN CERTIFICATE, AND DOES 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 SECURITIES AND EXCHANGE COMMISSION. RULE 17Ad-15). 



        The
holder of this certificate shall be entitled to receive funds from the Trust Account (as such term is defined in the Amended and Restated Certificate of Incorporation of the Company)
only in the event of the Company's liquidation upon failure to consummate a Business Combination (as such term is defined in the Amended and Restated Certificate of Incorporation of the Company) or if
the holder seeks to convert his respective shares into cash upon a Business Combination which he voted against and which is actually completed by the Company. In no other circumstances shall the
holder have any right or interest of any kind in or to the Trust Account. 


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Exhibit 4.2