Exhibit 4.2


 


	NUMBER	NUMBER

 C

 SHARES

 SEE REVERSE FOR

 CERTAIN

 DEFINITIONS

 CUSIP [●]



 


Consilium
Acquisition Corp I, Ltd.


INCORPORATED UNDER THE LAWS OF THE CAYMAN ISLANDS


CLASS A ORDINARY SHARES


 


	This Certifies that	 
	 	 
	is the owner of	 



 


FULLY PAID AND NON-ASSESSABLE CLASS A ORDINARY SHARES OF THE PAR VALUE
OF U.S.$0.0001 EACH OF


 


Consilium
Acquisition Corp I, Ltd.


(THE “COMPANY”)


 


subject to the Company’s amended and restated memorandum and
articles of association and transferable on the register of members of the Company in person or by duly authorized attorney upon surrender
of this certificate properly endorsed.


 


The Company will be forced to redeem all of its Class A ordinary shares
if it is unable to complete a business combination by [●], 2024, or such by later date approved by the Company’s shareholders
in accordance with the Company’s amended and restated memorandum and articles of association, all as more fully described in the
Company’s final prospectus dated [●], 2022.


 


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


 


Witness the facsimile signatures of its duly authorized officers.


 





	 	 	 
	Chairman of the Board of Directors	 	Chief Executive Officer and Chief Financial Officer



 






     


     


    

 


Consilium
Acquisition Corp I, Ltd.


 


The Company will furnish without charge to each shareholder who so
requests the powers, designations, preferences and relative, participating, optional or other special rights of each class of shares or
series thereof of the Company 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 amended and restated memorandum and
articles of association 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 Company), 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)
 under Uniform Gifts to Minors
	 	 	 	 



 


	JT TEN	
    — as joint tenants with right of survivorship
    and not as tenants in common

     
	 	Act	 
	 	 	(State)



 


	JT TEN	— as joint tenants with
    right of survivorship and not as tenants in common	 	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 represented by the within Certificate, and does hereby irrevocably constitute and appoint

                                                                                 

	Attorney to transfer the said shares on the register of members of the within named Company 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 UNDER THE UNITED STATES SECURITIES EXCHANGE ACT OF 1934, AS AMENDED).


 


In each case, as more fully described in the Company’s final
prospectus dated [●], 2022, 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 Company redeems the
Class A ordinary shares sold in its initial public offering and liquidates because it does not consummate an initial business combination
by [●], 2024, or by such later date approved by the Company’s shareholders in accordance with the Company’s amended
and restated memorandum and articles of association, (ii) the Company redeems the Class A ordinary shares sold in its initial public offering
in connection with a shareholder vote to amend the Company’s amended and restated memorandum and articles of association (A) to
modify the substance or timing of the Company’s obligation to allow redemption in connection with the Company’s initial business
combination or to redeem 100% of the Class A ordinary shares if it does not complete its initial business combination by [●], 2024,
or by such later date approved by the Company’s shareholders in accordance with the Company’s amended and restated memorandum
and articles of association, or (B) with respect to any other provision relating to the holder(s)’(s) rights or pre-initial business
combination activity, or (iii) if the holder(s) seek(s) to redeem for cash his, her, its or their respective Class A ordinary shares in
connection with a tender offer (or proxy solicitation, solely in the event the Company seeks shareholder 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 to or in the trust account.