Document:

Exhibit
4.2 

 

	NUMBER	SHARES
	C-	 

SEE REVERSE FOR CERTAIN DEFINITIONS

CUSIP [●]

 

IBERE PHARMACEUTICALS

CLASS A ORDINARY SHARES

 

THIS CERTIFIES THAT
is the owner of Class A ordinary shares, par value $0.0001 per share (each, a “Class A Ordinary Share”),
of Ibere Pharmaceuticals, a Cayman Islands exempted company (the “Company”), 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 Class A Ordinary Shares if it is unable to complete a business combination by , 2022, or such by later
date approved by the Company’s shareholders in accordance with the Amended and Restated Memorandum and Articles of Association
of the Company, 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 of the Company.

 

Witness the facsimile
signature of a duly authorized signatory of the Company.

 

	Authorized Signatory	 	 	 	Transfer Agent

 

Ibere Pharmaceuticals

 

The Company will furnish
without charge to each shareholder who so requests, a statement of the powers, designations, preferences and relative, participating,
optional or other special rights of each class of equity 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 of the Company 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 ___________
	 	 	 	 	 	 	(Cust) (Minor)
	TEN ENT	—	as tenants by the entireties	 	 	 	 
	 	 	 	 	 	 	Under Uniform Gifts to Minors Act
	JT TEN	—	as joint tenants with right of survivorship and not as tenants in common	 	 	 	
        _____________________________

        (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))

 

Class A Ordinary Shares represented by the within certificate,
and do hereby irrevocably constitute and appoint

 

Attorney to transfer the said
Class A Ordinary Shares on the books of the within named Company with full power of substitution in the premises.

 

Dated 

	 	 	 
	 	Notice: 	The signature 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:	 

 

     

     

    

 

	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, and subject to the terms and conditions described in, the Company’s final prospectus for its initial public offering
dated , 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 Company’s initial public offering 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
within the time period set forth in the Company’s Amended and Restated Memorandum and Articles of Association, as the same
may be amended from time to time, or (ii) if the holder(s) properly redeem for cash his, her or its respective Class A Ordinary
Shares represented by this certificate in connection with (x) 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 or (y) 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 our initial business
combination or to redeem 100% of the Class A Ordinary Shares if it does not consummate an initial business combination within the
time set forth in the Company’s Amended and Restated Memorandum and Articles of Association, as the same may be amended from
time to time or (B) with respect to any other material provisions relating to shareholders’ rights or pre-initial Business
Combination activity. 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 

 

EXHIBIT A

[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

Ibere Pharmaceuticals

Incorporated Under the Laws of the Cayman Islands

 

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 Class A ordinary shares, $0.0001
par value (“Ordinary Shares”), of Ibere Pharmaceuticals, a Cayman Islands exempted company (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 nonassessable Ordinary Shares 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 Ordinary Share. 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 an Ordinary Share,
the Company shall, upon exercise, round down to the nearest whole number the number of Ordinary Shares to be issued to the Warrant
holder. The number of Ordinary Shares issuable upon exercise of the Warrants is subject to adjustment upon the occurrence of certain
events as set forth in the Warrant Agreement.

 

The initial Exercise
Price per one Ordinary Share 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.

 

    1

     

    

 

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.

 

	 	IBERE PHARMACEUTICALS
	 	 
	 	By:	 
	 	Name: Osagie Imasogie
	 	Title: Chief Executive Officer
	 	 
	 	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               Ordinary
Shares 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 the Ordinary Shares to be issued upon exercise is effective under the Securities Act and (ii)
a prospectus thereunder relating to the Ordinary Shares 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 Ordinary Shares 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 an Ordinary Share, the Company shall, upon exercise, round down to the nearest whole
number of Ordinary Shares 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.

 

    3

     

    

 

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 shareholder of
the Company.

 

    4

     

    

 

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              
Ordinary Shares and herewith tenders payment for such Ordinary Shares to the order of Ibere Pharmaceuticals (the “Company”)
in the amount of $               in accordance with the terms
hereof. The undersigned requests that a certificate for such Ordinary Shares be registered in the name of              ,
whose address is               and that such Ordinary Shares
be delivered to               whose address is              .
If said number of Ordinary Shares is less than all of the Ordinary Shares purchasable hereunder, the undersigned requests that
a new Warrant Certificate representing the remaining balance of such Ordinary Shares 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 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 Ordinary Shares 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 Ordinary Shares 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 Ordinary
Shares 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 Ordinary Shares. If said number of shares is less than all of the Ordinary Shares purchasable hereunder (after
giving effect to the cashless exercise), the undersigned requests that a new Warrant Certificate representing the remaining balance
of such Ordinary Shares be registered in the name of              ,
whose address is               and that such Warrant Certificate
be delivered to              , whose address is              .

 

[Signature Page Follows]

 

    5

     

    

 

Date:               ,
21

 

	 	(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).

 

    6

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