Exhibit 4.2


SPECIMEN CLASS A COMMON STOCK CERTIFICATE


	NUMBER	NUMBER
	 	C-
	 	SHARES
	 	SEE REVERSE FOR CERTAIN DEFINITIONS
	 	CUSIP ________________
	 	 


 


CENAQ Energy
Corp.


 

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

CLASS A COMMON STOCK


 


This Certifies that      is the owner of


 


FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $0.0001
EACH OF THE CLASS A COMMON STOCK OF


 


CENAQ Energy
Corp.

(THE “CORPORATION”)


 


transferable on the books of the Corporation in person or by
duly authorized attorney upon surrender of this certificate properly endorsed.


 


The Corporation will be forced to redeem
all of its shares of Class A common stock if it is unable to complete a business combination by    , 2023, all as more fully described
in the Corporation’s final prospectus dated      , 2021.


 


This certificate is not valid unless countersigned by the Transfer
Agent and registered by the Registrar.


 


Witness the seal of the Corporation and the facsimile signatures
of its duly authorized officers.


 


	
        

        Chief Executive Officer
	[Corporate Seal] Delaware
	 	 
	 	 



 






     


     


    

 


CENAQ Energy
Corp.


 


The Corporation 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 Corporation and the qualifications, limitations, or restrictions
of such preferences and/or rights. This certificate and the shares represented thereby are issued and shall be held subject to
all the provisions of the Certificate of Incorporation and all amendments thereto and resolutions of the Board of Directors providing
for the issue of securities (copies of which may be obtained from the secretary of the Corporation), to all of which the holder
of this certificate by acceptance hereof assents. 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 sells, assigns and transfers
unto


 


(PLEASE INSERT
SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER(S) OF ASSIGNEE(S))


 




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


 


Shares of the capital stock
represented by the within Certificate, and hereby irrevocably constitutes and appoints 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(S) 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:
	 
	By	 
	 	 


 


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 (OR ANY SUCCESSOR RULE).


 


In each case, as more fully described in
the Corporation’s final prospectus dated   , 2021, the holder(s) of this certificate shall be entitled to receive a pro-rata
portion of certain funds held in the trust account established in connection with its initial public offering only in the event
that (i) the Corporation redeems the shares of Class A common stock sold in the Company’s initial public offering and liquidates
because it does not consummate an initial business combination by   , 2023, (ii) the Corporation redeems the shares of Class
A common stock sold in its initial public offering in connection with a stockholder vote to amend the Corporation’s amended
and restated certificate of incorporation to modify the substance or timing of the Corporation’s obligation to redeem 100%
of the Class A common stock if it does not consummate an initial business combination by  , 2023, or (iii) if the holder(s)
seek(s) to redeem for cash his, her or its respective shares of Class A common stock in connection with a tender offer (or proxy
solicitation, solely in the event the Corporation seeks stockholder approval of the proposed initial business combination) setting
forth the details of a proposed initial business combination. In no other circumstances shall the holder(s) have any right or interest
of any kind in or to the trust account.