Document:

Exhibit 4.1

 

	NUMBER C–[        ]	 	 	[        ] SHARES
	SEE REVERSE FOR CERTAIN DEFINITIONS	 	 	CUSIP [        ]

 

SIGNAL
HILL ACQUISITION 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 CLASS A COMMON STOCK OF THE PAR VALUE OF $0.0001 EACH OF

 

SIGNAL
HILL ACQUISITION CORP.

(THE
 "COMPANY")

 

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.

 

	 	 	 	 	 	 	 
	Transfer Agent	 	 	_________________,

    Signal Hill Acquisition Corp.
	 	 	_________________,

    Signal Hill Acquisition Corp.

	 	 	 	 	 	 	 
	 	 	 	 	 	 	 
	 	 	 	 

    SIGNAL
    HILL ACQUISITION CORP.
	 	 	 

 

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 Company’s
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 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 Certificate, and hereby irrevocably constitutes and appoints

	 
	 
	Attorney to transfer the said stock on the books 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).Exhibit 4.2

 

	NUMBER C–[        ]	 	 	[        ] SHARES
	SEE REVERSE FOR CERTAIN DEFINITIONS	 	 	CUSIP [        ]

 

SIGNAL
HILL ACQUISITION CORP.

INCORPORATED
UNDER THE LAWS OF THE STATE OF DELAWARE

 

UNITS CONSISTING OF
ONE SHARE OF CLASS A COMMON STOCK AND

ONE-HALF OF ONE REDEEMABLE
PUBLIC WARRANT, EACH WHOLE PUBLIC WARRANT

ENTITLING THE HOLDER
TO PURCHASE ONE SHARE OF

CLASS A COMMON STOCK

 

THIS CERTIFIES THAT [    ]
is the owner of Units.

 

Each unit (“Unit”)
consists of one (1) share of Class A common stock, par value $0.0001 per share (“Class A Common Stock”),
of Signal Hill Acquisition Corp., a Delaware corporation (the “Corporation”), and one-half (1/2) of one redeemable
public warrant (each whole public warrant, a “Public Warrant”). Each whole Public Warrant entitles the holder
to purchase one (1) share (subject to adjustment) of the Class A Common Stock for $11.50 per share (subject to adjustment).
Only whole Public Warrants are exercisable. Each whole Public Warrant will become exercisable on the later of (i) thirty (30) days
after the Corporation’s completion of a merger, consolidation, capital stock exchange, asset acquisition, stock purchase, reorganization
or other similar business combination with one or more businesses or entities (each, a “Business Combination”),
and (ii) twelve (12) months from the closing of the Corporation’s initial public offering, and will expire unless exercised
before 5:00 p.m., New York City time, on the date that is five (5) years after the date on which the Corporation completes its initial
Business Combination, or earlier upon redemption or liquidation (the “Expiration Date”). The Class A Common
Stock and Public Warrants comprising the Units represented by this certificate are not transferable separately prior to [    
], 2022, unless B. Riley Securities, Inc. elects to allow earlier separate trading, subject to the Corporation’s filing of a Current
Report on Form 8-K with the Securities and Exchange Commission containing an audited balance sheet reflecting the Corporation’s
receipt of the gross proceeds of the Corporation’s initial public offering and issuing a press release announcing when separate
trading will begin. No fractional Public Warrants will be issued upon separation of the Units and only whole Public Warrants will trade.
The terms of the Public Warrants are governed by that certain public warrant agreement, dated as of [ ], 2022 (as amended, supplemented
or otherwise modified from time to time, the “Public Warrant Agreement”), by and between the Corporation and
Continental Stock Transfer & Trust Company, as warrant agent (in such capacity, the “Warrant Agent”),
and are subject to the terms and provisions contained therein, all of which terms and provisions the holder of this certificate consents
to by acceptance hereof. Copies of the Public Warrant Agreement are on file at the office of the Warrant Agent at One State Street, 30th Floor,
New York, New York 10004, and are available to any holder of a Public Warrant on written request and without cost.

 

Upon the consummation
of an initial Business Combination, the Units represented by this certificate will automatically separate into the shares of the Class A
Common Stock and the Public Warrants comprising such Units.

 

This certificate is not
valid unless countersigned by Continental Stock Transfer & Trust Company, in its capacity as the transfer agent, and registered
by the registrar of the Corporation.

 

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

 

Witness the facsimile
signature of its duly authorized officers.

 

	By:	 	 	 	 	 	By:	 	 
	 	 	Name:	 	 	 	 	 	Name:
	 	 	Title:	 	 	 	 	 	Title:

 

    1

     

    

 

SIGNAL
HILL ACQUISITION CORP.

 

The Corporation will
furnish without charge to each holder of the Units who so requests a statement of 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.

 

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.

 

    2

     

    

 

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))

 

Units represented by
the within certificate, and does hereby irrevocably constitute and appoint

 

Attorney to transfer the
said Units 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 whatsoever.

 

    3

     

    

 

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

 

As more fully described
in the Corporation’s final prospectus, dated [    ], 2022, the holder(s) of the Class A Common Stock 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 holder(s) seek(s) to redeem for cash his, her or its respective shares of
the 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, (ii) the
Corporation redeems the shares of the 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 (as further amended, supplemented or otherwise modified
from time to time, the “Certificate of Incorporation”) to modify the substance or timing of the Corporation’s
obligation to allow redemptions in connection with an initial business combination or to redeem one-hundred percent (100%) of
the Class A Common Stock if it does not consummate an initial business combination by [                ]
(or a later date, if such period is extended pursuant to, and in accordance with, the Certificate of Incorporation) or with respect to
any other material provision relating to stockholders’ rights or pre-initial business combination activity or (iii) the
Corporation redeems the shares of the Class A Common Stock sold in its initial public offering and liquidates because it does not
consummate an initial business combination by [            ] (or a later date,
if such period is extended pursuant to, and in accordance with, the Certificate of Incorporation). In no other circumstances shall the
holder(s) have any right or interest of any kind in or to the trust account.

 

    4

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