Document:

Exhibit 4.2

 

	NUMBER	SHARES

   

	C- 	SEE REVERSE FOR
	 	CERTAIN DEFINITIONS

  

CUSIP [●]

SPECIMEN
CLASS A COMMON STOCK CERTIFICATE

 

STAR PEAK 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 STAR PEAK CORP II (THE “COMPANY”) subject to
the Company’s amended and restated certificate of incorporation, as the same may be amended from time to time, and transferable
on the books 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 shares of Class A common stock if it is unable to complete a business combination within the period
set forth in the Company’s amended and restated certificate of incorporation, as the same may be amended from time to time,
all as more fully described in the Company’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 Company and the facsimile signatures of its duly authorized officers.

 

Dated:_____________

 

	Chief Executive Officer	[Corporate Seal]	Chief Financial Officer
	 	 	 
		Delaware	

 

 

     

     

    

 

STAR PEAK CORP II

 

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 thereby are issued and shall be held subject to all the provisions of
the Company’s amended and restated certificate of incorporation, as the same may be amended from time to time 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)
	 	 	 	 	 	 
	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 does hereby irrevocably constitute and appoint

 

 

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

 

Dated:__________

 

 

	 	 
	 	Shareholder

 

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 Company’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 Company 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 Company’s amended and restated
certificate of incorporation, as the same may be amended from time to time, (ii) the Company redeems the shares of Class A common
stock sold in its initial public offering in connection with a stockholder vote to amend the Company’s amended and restated
certificate of incorporation to modify the substance or timing of the Company’s obligation to provide holders of the Class A
common stock the right to have their shares redeemed in connection with the Company’s initial business combination or to
redeem 100% of the Class A common stock if the Company does not complete its initial business combination within the time period
set forth therein or with respect to any other provision relating to the rights of holders of the Class A common stock 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 Company 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.Exhibit 4.3

[FACE]

 

Number

 

Warrants

 

THIS
WARRANT SHALL BE VOID IF NOT EXERCISED PRIOR TO

THE EXPIRATION OF THE EXERCISE PERIOD PROVIDED FOR

IN THE WARRANT AGREEMENT DESCRIBED BELOW

STAR PEAK CORP II

Incorporated Under the Laws of the State of Delaware

 

CUSIP [●]

 

Warrant Certificate

 

This
Warrant Certificate certifies that             
, or registered assigns, is the registered holder of             warrant(s)
(the “Warrants” and each, a “Warrant”) to purchase shares of Class A common
stock, $0.0001 par value (“Common Stock”), of Star Peak Corp II, a Delaware corporation (the “Company”).
Each Warrant entitles the holder, upon exercise during the period set forth in the Warrant Agreement referred to below, to receive
from the Company that number of fully paid and non-assessable shares of Common Stock as set forth below, at the exercise price
(the “Exercise Price”) as determined pursuant to the Warrant Agreement, payable in lawful money (or through
“cashless exercise” as provided for in the Warrant Agreement) of the United States of America upon surrender
of this Warrant Certificate and payment of the Exercise Price at the office or agency of the Warrant Agent referred to below, subject
to the conditions set forth herein and in the Warrant Agreement.

 

Defined
terms used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant Agreement.

 

Each whole Warrant is initially exercisable
for one fully paid and non-assessable share of Common Stock. Fractional shares shall not be issued upon exercise of any Warrant.
If, upon the exercise of Warrants, a holder would be entitled to receive a fractional interest in a share of Common Stock, the
Company shall, upon exercise, round down to the nearest whole number the number of shares of Common Stock to be issued to the Warrant
holder. The number of shares of Common Stock issuable upon exercise of the Warrants is subject to adjustment upon the occurrence
of certain events set forth in the Warrant Agreement.

 

The
initial Exercise Price per one share of Common Stock for any Warrant is equal to $11.50 per share. The Exercise Price is subject
to adjustment upon the occurrence of certain events as set forth in the Warrant Agreement.

 

Subject
to the conditions set forth in the Warrant Agreement, the Warrants may be exercised only during the Exercise Period and
to the extent not exercised by the end of such Exercise Period, such Warrants shall become void. The Warrants may be redeemed,
subject to certain conditions, as set forth in the Warrant Agreement.

 

Reference
is hereby made to the further provisions of this Warrant Certificate set forth on the reverse hereof and such further provisions
shall for all purposes have the same effect as though fully set forth at this place.

 

This Warrant Certificate shall not be valid
unless countersigned by the Warrant Agent, as such term is used in the Warrant Agreement.

 

This
Warrant Certificate shall be governed by and construed in accordance with the internal laws of the State of New York.

 

     

     

    

 

	 	STAR
    PEAK CORP II
	 	 
	 	By:	 
	 	Name:	 
	 	Title:	 
	 	 
	 	CONTINENTAL
    STOCK TRANSFER & TRUST COMPANY,
	 	as
    Warrant Agent
	 	 
	 	By:	 
	 	Name:	 
	 	Title:	            

 

    2

     

    

 

[Form of Warrant Certificate]

[Reverse]

 

The
Warrants evidenced by this Warrant Certificate are part of a duly authorized issue of Warrants entitling the holder on exercise
to receive             shares of Common Stock and are issued or
to be issued pursuant to a Warrant Agreement dated as of [●], 2021 (the “Warrant Agreement”),
duly executed and delivered by the Company to Continental Stock Transfer & Trust Company, a New York corporation, as warrant
agent (the “Warrant Agent”), which Warrant Agreement is hereby incorporated by reference in and made
a part of this instrument and is hereby referred to for a description of the rights, limitation of rights, obligations, duties
and immunities thereunder of the Warrant Agent, the Company and the holders (the words “holders” or “holder”
meaning the Registered Holders or Registered Holder, respectively) of the Warrants. A copy of the Warrant Agreement may be obtained
by the holder hereof upon written request to the Company. Defined terms used in this Warrant Certificate but not defined herein
shall have the meanings given to them in the Warrant Agreement.

 

Warrants
may be exercised at any time during the Exercise Period set forth in the Warrant Agreement. The holder of Warrants evidenced by
this Warrant Certificate may exercise them by surrendering this Warrant Certificate, with the form of Election to Purchase set
forth hereon properly completed and executed, together with payment of the Exercise Price as specified in the Warrant Agreement
(or through “cashless exercise” as provided for in the Warrant Agreement) at the principal corporate trust office of
the Warrant Agent. In the event that upon any exercise of Warrants evidenced hereby the number of Warrants exercised shall be less
than the total number of Warrants evidenced hereby, there shall be issued to the holder hereof or his, her or its assignee, a new
Warrant Certificate evidencing the number of Warrants not exercised.

 

Notwithstanding
anything else in this Warrant Certificate or the Warrant Agreement, no Warrant may be exercised unless at the time of exercise
(i) a registration statement covering the issuance of shares of Common Stock to be issued upon exercise is effective under
the Securities Act and (ii) a prospectus thereunder relating to the shares of Common Stock is current, except through “cashless
exercise” as provided for in the Warrant Agreement.

 

The
Warrant Agreement provides that upon the occurrence of certain events the number of shares of Common Stock issuable upon exercise
of the Warrants set forth on the face hereof may, subject to certain conditions, be adjusted. If, upon exercise of a Warrant, the
holder thereof would be entitled to receive a fractional interest in a share of Common Stock, the Company shall, upon exercise,
round down to the nearest whole number of shares of Common Stock to be issued to the holder of the Warrant.

 

Warrant Certificates, when surrendered
at the principal corporate trust office of the Warrant Agent by the Registered Holder thereof in person or by legal representative
or attorney duly authorized in writing, may be exchanged, in the manner and subject to the limitations provided in the Warrant
Agreement, but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor evidencing
in the aggregate a like number of Warrants.

 

Upon
due presentation for registration of transfer of this Warrant Certificate at the office of the Warrant Agent a new Warrant Certificate
or Warrant Certificates of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the transferee(s)
in exchange for this Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without charge except
for any tax or other governmental charge imposed in connection therewith.

 

The
Company and the Warrant Agent may deem and treat the Registered Holder(s) hereof as the absolute owner(s) of this Warrant Certificate
(notwithstanding any notation of ownership or other writing hereon made by anyone), for the purpose of any exercise hereof, of
any distribution to the holder(s) hereof, and for all other purposes, and neither the Company nor the Warrant Agent shall be affected
by any notice to the contrary. Neither the Warrants nor this Warrant Certificate entitles any holder hereof to any rights
of a stockholder of the Company.

 

     

     

    

 

Election to Purchase

(To Be Executed Upon Exercise of Warrant)

 

The
undersigned hereby irrevocably elects to exercise the right, represented by this Warrant Certificate, to receive               shares
of Common Stock and herewith tenders payment for such shares of Common Stock to the order of Star Peak Corp II (the “Company”)
in the amount of $               in accordance with
the terms hereof. The undersigned requests that a certificate for such shares of Common Stock be registered in the name of                ,
whose address is               and that such shares of Common
Stock be delivered to              whose address is              .
If said               number of shares of Common Stock
is less than all of the shares of Common Stock purchasable hereunder, the undersigned requests that a new Warrant Certificate representing
the remaining balance of such shares of Common Stock be registered in the name of              ,
whose address is            and that such Warrant Certificate be delivered
to               , whose address is              .

 

In
the event that the Warrant has been called for redemption by the Company pursuant to Section 6.2 of the Warrant Agreement
and a holder thereof elects to exercise its Warrant pursuant to a Make-Whole Exercise, the number of shares of Common Stock that
this Warrant is exercisable for shall be determined in accordance with subsection 3.3.1(c) or Section 6.2
of the Warrant Agreement, as applicable.

 

In the event that the Warrant is a Private
Placement Warrant that is to be exercised on a “cashless” basis pursuant to subsection 3.3.1(c) of the Warrant
Agreement, the number of shares of Common Stock that this Warrant is exercisable for shall be determined in accordance with subsection
3.3.1(c) of the Warrant Agreement.

 

In the event that the Warrant is to be
exercised on a “cashless” basis pursuant to Section 7.4 of the Warrant Agreement, the number of shares of Common
Stock that this Warrant is exercisable for shall be determined in accordance with Section 7.4 of the Warrant Agreement.

 

In
the event that the Warrant may be exercised, to the extent allowed by the Warrant Agreement, through cashless exercise (i) the
number of shares of Common Stock that this Warrant is exercisable for would be determined in accordance with the relevant section
of the Warrant Agreement which allows for such cashless exercise and (ii) the holder hereof shall complete the following: The undersigned
hereby irrevocably elects to exercise the right, represented by this Warrant Certificate, through the cashless exercise provisions
of the Warrant Agreement, to receive shares of Common Stock. If said number of shares is less than all of the shares of Common
Stock purchasable hereunder (after giving effect to the cashless exercise), the undersigned requests that a new Warrant Certificate
representing the remaining balance of such shares of Common Stock be registered in the name of               ,
whose address is            and that such Warrant Certificate be delivered
to              , whose address is                .

 

[Signature Page Follows]

 

     

     

    

 

Date:               ,
20

 

	 	 
	 	(Signature)
	 	 
	 	 
	 	(Address)
	 	 
	 	 
	 	(Tax
    Identification Number)

 

Signature Guaranteed:

 

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 UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED).

 

     

     

    

 

EXHIBIT
B

LEGEND

 

THE SECURITIES REPRESENTED BY THIS CERTIFICATE
HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE SECURITIES LAWS, AND MAY NOT BE OFFERED, SOLD,
TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND ANY APPLICABLE STATE SECURITIES
LAWS OR AN EXEMPTION FROM REGISTRATION IS AVAILABLE. IN ADDITION, SUBJECT TO ANY ADDITIONAL LIMITATIONS ON TRANSFER DESCRIBED IN
THE LETTER AGREEMENT BY AND AMONG STAR PEAK CORP II (THE “COMPANY”), STAR PEAK SPONSOR II LLC AND THE OTHER PARTIES
THERETO, THE SECURITIES REPRESENTED BY THIS CERTIFICATE MAY NOT BE SOLD OR TRANSFERRED PRIOR TO THE DATE THAT IS THIRTY (30) DAYS
AFTER THE DATE UPON WHICH THE COMPANY COMPLETES ITS INITIAL BUSINESS COMBINATION (AS DEFINED IN SECTION 3 OF THE WARRANT AGREEMENT
REFERRED TO HEREIN) EXCEPT TO A PERMITTED TRANSFEREE (AS DEFINED IN SECTION 2 OF THE WARRANT AGREEMENT) WHO AGREES IN WRITING WITH
THE COMPANY TO BE SUBJECT TO SUCH TRANSFER PROVISIONS.

 

SECURITIES EVIDENCED BY THIS CERTIFICATE
AND SHARES OF CLASS A COMMON STOCK OF THE COMPANY ISSUED UPON EXERCISE OF SUCH SECURITIES SHALL BE ENTITLED TO REGISTRATION RIGHTS
UNDER A REGISTRATION AND STOCKHOLDER RIGHTS AGREEMENT TO BE EXECUTED BY THE COMPANY.

 

	No.	Warrants

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