Document:

Exhibit 4.1

 

	NUMBER	UNITS
	U	 

SEE REVERSE FOR CERTAIN DEFINITIONS

 

	 	CUSIP	 

 

AMCI ACQUISITION CORP. II

 

UNITS CONSISTING OF ONE SHARE OF CLASS A
COMMON STOCK AND ONE-HALF OF ONE REDEEMABLE WARRANT, EACH WHOLE 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 share of Class A common stock, par value $0.0001 per share (“Common Stock”), of AMCI Acquisition
Corp. II, a Delaware corporation (the “Company”), and one-half of one redeemable warrant (the “Warrant”).
Each whole Warrant entitles the holder to purchase one share of Common Stock for $11.50 per share (subject to adjustment). Only whole
Warrants are exercisable. Each whole Warrant will become exercisable thirty (30) days after the Company’s completion of a merger,
capital stock exchange, asset acquisition, stock purchase, reorganization or other similar business combination with one or more businesses
(each a “Business Combination”) 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 Company completes its initial Business Combination, or earlier upon redemption
or liquidation. The Common Stock and Warrants comprising the Units represented by this certificate are not transferable separately prior
to              , 2021, unless Evercore Group L.L.C. elects to allow separate trading earlier, subject to the Company’s filing of a Current Report
on Form 8-K with the Securities and Exchange Commission containing an audited balance sheet reflecting the Company’s receipt
of the gross proceeds of the Company’s initial public offering and issuing a press release announcing when separate trading will
begin. No fractional Warrants will be issued upon separation of the Units. The terms of the Warrants are governed by a Warrant Agreement,
dated as of                   , 2021, between the Company and Continental Stock Transfer & Trust Company, as 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 Warrant Agreement are on file at the office of the Warrant Agent at 1 State Street, 30th Floor, New York, New York
10004, and are available to any Warrant holder on written request and without cost.

 

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

 

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 a duly authorized
signatory of the Company.

 

	 	 	 
	Authorized Signatory	 	Transfer Agent

 

     

     

    

 

AMCI Acquisition Corp. II

 

The Company will furnish without charge to each
unitholder 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.

 

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 sell, assign and transfer unto

 

(PLEASE INSERT SOCIAL SECURITY OR OTHER DENTIFYING
NUMBER OF ASSIGNEE)

 

(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING
ZIP CODE, OF ASSIGNEE)

 

Units represented by the within Certificate, and do hereby
irrevocably constitute and appoint

 

Attorney to transfer the said Units 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            , 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 the Company’s
initial public offering only in the event that (i) the Company redeems the shares of Common Stock sold in the Company’s initial
public offering and liquidates because it does not consummate an initial business combination by the date set forth (the “Last Date”)
in the Company’s Amended and Restated Certificate of Incorporation, as the same may be amended from time to time (the “Charter”),
(ii) the Company redeems the shares of Common Stock sold in its initial public offering properly submitted in connection with a stockholder
vote to amend the Charter to modify the substance or timing of the Company’s obligation to redeem 100% of the Common Stock if it
does not consummate an initial business combination by the Last Date or with respect to any other material provisions relating to stockholders’
rights or pre-initial business combination activity, or (iii) if the holder(s) seek(s) to redeem for cash his, her or its
respective shares of 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

 

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

 

AMCI Acquisition 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 (“Class A
Common Stock”), of AMCI Acquisition 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 nonassessable shares of Class A Common Stock as set forth below, at the exercise price (the “Warrant
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
Warrant 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 Class A 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 Class A
Common Stock, the Company shall, upon exercise, round down to the nearest whole number the number of shares of Class A Common Stock
to be issued to the Warrant holder. The number of shares of Class A Common Stock 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 Warrant Price
per share of Class A Common Stock for any Warrant is equal to $11.50 per share. The Warrant 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.

 

	 	AMCI ACQUISITION CORP. II
	 	 	 
	 	By:	 
	 	 	Name:
	 	 	Title: Authorized Signatory
	 	 	 
	 	CONTINENTAL STOCK TRANSFER & TRUST COMPANY,

as
Warrant Agent

	 	 	 
	 	 	 
	 	By:	 
	 	 	Name:
	 	 	Title:

 

     

     

    

 

[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 Class A
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 Warrant 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 shares of Class A Common Stock to be issued upon exercise is effective under the Securities
Act and (ii) a prospectus thereunder relating to the shares of Class A 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 Class A 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 Class A Common Stock, the Company shall, upon exercise, round down to the
nearest whole number of shares of Class A 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 Class A Common Stock and
herewith tenders payment for such shares of Class A Common Stock to the order of AMCI Acquisition Corp. II (the “Company”)
in the amount of $[  ] in accordance with the terms hereof. The undersigned requests that a certificate for such shares of Class A
Common Stock be registered in the name of [  ], whose address is [  ] and that such shares of Class A Common
Stock be delivered to [  ] whose address is [  ]. If said [  ] number of shares of Class A Common Stock
is less than all of the shares of Class A Common Stock purchasable hereunder, the undersigned requests that a new Warrant Certificate
representing the remaining balance of such shares of Class A 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 Class A 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 Class A 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 Class A 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 Class A
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 Class A Common Stock. If said number of shares is less than all of the shares of Class A 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 Class A 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).

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