Exhibit 4.2


 


NUMBER


 


C-


	
        

         
	SHARES
	 	SEE REVERSE FOR
	 	CERTAIN DEFINITIONS
	 	CUSIP [             ]


 


SPARTAN ACQUISITION CORP. II

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


 


SPARTAN ACQUISITION CORP. II

(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 [        ], 2022, or by [        ], 2023
if the Corporation has executed a letter of intent, agreement in principle or definitive agreement for an initial business combination
by [        ], 2022 but has not completed its initial business combination by [        ], 2022, as more fully described in the Corporation’s
final prospectus dated [        ], 2020.


 


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.


 


 


	Secretary	[Corporate Seal]

Delaware	Chief Executive Officer


 






    


    	 



    

 


SPARTAN ACQUISITION
CORP. II


 


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 RULE 17Ad-15 UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED (OR ANY SUCCESSOR RULE)).


  






    


    	 



    




 


In each case, as more
fully described in the Corporation’s final prospectus dated [●], 2020, 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 the Corporation’s
initial public offering only in the event that (i) the Corporation redeems the shares of Class A common stock sold in its initial
public offering and liquidates because it does not consummate an initial business combination within the period of time set forth
in the Corporation’s amended and restated certificate of incorporation, as may be amended by from to time (the “Charter”), (ii)
the Corporation redeems the shares of Class A common stock sold in its initial public offering in connection with a stockholder
vote to approve an amendment to the Charter that would affect 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 within the period of time
set forth therein 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.