Document:

EX-4.1

 Exhibit 4.1 

POST HOLDINGS PARTNERING CORPORATION 

and 
 CONTINENTAL STOCK
TRANSFER & TRUST COMPANY 
 WARRANT AGREEMENT 

Dated as of May 28, 2021 

THIS WARRANT AGREEMENT (this “Agreement”), dated as of May 28, 2021, is by and between Post Holdings Partnering
Corporation, a Delaware corporation (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (in such capacity, the “Warrant Agent”). 

WHEREAS, the Company has entered into that certain Private Placement Units Purchase Agreement with PHPC Sponsor, LLC, a Delaware limited
liability company (the “Sponsor”), pursuant to which the Sponsor agreed to purchase an aggregate of 1,000,000 units (or 1,090,000 units in the aggregate if the Over-allotment Option (as defined below) in connection with the
Company’s Offering (as defined below) is exercised in full) simultaneously with the closing of the Offering (and the closing of the Over-allotment Option, if applicable) (the “Private Placement Units”) at a purchase price of
$10.00 per Private Placement Unit. The Private Placement Units include an aggregate of 333,333 private placement warrants (or 363,333 private placement warrants if the Over-allotment Option is exercised in full) (the “Private Placement
Warrants”) bearing the legend set forth in Exhibit B hereto. Each Private Placement Warrant entitles the holder thereof to purchase one share of Series A Common Stock (as defined below) at a price of $11.50 per share, subject to adjustment
as described herein; 
 WHEREAS, the Company has entered into that certain Forward Purchase Agreement with the Sponsor, pursuant to which
the Sponsor has agreed to purchase an aggregate of 10,000,000 forward purchase units, which consist in the aggregate of 10,000,000 shares of the Company’s Series B common stock, par value $0.0001 per share (the “Series B Common
Stock”), and 3,333,333 redeemable warrants (the “Forward Purchase Warrants”) in a private placement transaction to occur substantially concurrently with the closing of the Company’s Partnering Transaction (as defined
below). Each Forward Purchase Warrant will entitle the holder thereof to purchase one share of the Company’s Series A common stock, par value $0.0001 per share (the “Series A Common Stock”), for $11.50 per share, subject to
adjustment, terms and limitations as described herein; 
 WHEREAS, as used in this Agreement, the term “Common Stock” means
the Series A Common Stock; provided, however, that following any event described in Section 4.1.1(b) pursuant to which the Warrants become exercisable for shares of the Company’s Series C common stock,
par value $0.0001 per share (the “Series C Common Stock”), in addition to Series A Common Stock, the term “Common Stock” shall be read to include the Series A Common Stock and Series C Common Stock, where applicable; 

 WHEREAS, in order to finance the Company’s transaction costs in connection with an
intended initial merger, share exchange, asset acquisition, share purchase, reorganization or similar partnering transaction, involving the Company and one or more businesses (a “Partnering Transaction”), the Sponsor, Post Holdings,
Inc., a Missouri corporation and the parent of the Sponsor and any successor thereto (“Post”), and its subsidiaries may, but are not obligated to, loan the Company funds as the Company may require, of which up to $2,500,000 of such
loans made to the Company may be convertible into up to an additional 250,000 Private Placement Units at a price of $10.00 per Private Placement Unit, and the Private Placement Warrants underlying such Private Placement Units issued in this way
shall have the same terms and be in the same form as the other Private Placement Warrants described under this Agreement; 
 WHEREAS, the
Company is engaged in an initial public offering (the “Offering”) of units of the Company’s equity securities, each such unit comprised of one share of Series A Common Stock and one-third
of one Public Warrant (as defined below) (the “Units”) and, in connection therewith, has determined to issue and deliver up to 11,500,000 redeemable warrants (including up to 1,500,000 redeemable warrants subject to the
Over-allotment Option) to public investors in the Offering (the “Public Warrants” and, together with the Private Placement Warrants and the Forward Purchase Warrants, the “Warrants”). Each whole Warrant entitles the
holder thereof to purchase one share of Series A Common Stock, for $11.50 per whole share, subject to adjustments, terms and limitations as described herein. Only whole warrants are exercisable. A holder of the Public Warrants will not be able to
exercise any fraction of a Warrant; 
 WHEREAS, the Company has filed with the Securities and Exchange Commission (the
“Commission”) a registration statement on Form S-1, File No. 333-252910 (the “Registration Statement”) and prospectus (the
“Prospectus”), for the registration, under the Securities Act of 1933, as amended (the “Securities Act”), of the Units, the Public Warrants and the shares of Series A Common Stock included in the Units; 

WHEREAS, the Company desires the Warrant Agent to act on behalf of the Company, and the Warrant Agent is willing to so act, in connection with
the issuance, registration, transfer, exchange, redemption and exercise of the Warrants; 
 WHEREAS, the Company desires to provide for the
form and provisions of the Warrants, the terms upon which they shall be issued and exercised, and the respective rights, limitation of rights, and immunities of the Company, the Warrant Agent, and the holders of the Warrants; and 

WHEREAS, all acts and things have been done and performed which are necessary to make the Warrants, when executed on behalf of the Company and
countersigned by or on behalf of the Warrant Agent (if a physical certificate is issued), as provided herein, the valid, binding and legal obligations of the Company, and to authorize the execution and delivery of this Agreement. 

NOW, THEREFORE, in consideration of the mutual agreements herein contained, the parties hereto agree as follows: 

 

	1.	 Appointment of Warrant Agent. The Company hereby appoints the Warrant Agent to act as agent for the
Company for the Warrants, and the Warrant Agent hereby accepts such appointment and agrees to perform the same in accordance with the terms and conditions set forth in this Agreement. 

 

	2.	 Warrants. 

  
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	2.1	 Form of Warrant. Each Warrant shall initially be issued in registered form only. 

 

	2.2	 Effect of Countersignature. If a physical certificate is issued, unless and until countersigned by the
Warrant Agent, either by manual or facsimile signature, pursuant to this Agreement, a certificated Warrant shall be invalid and of no effect and may not be exercised by the holder thereof. 

 

	2.3	 Registration. 

 

	 	2.3.1	 Warrant Register. The Warrant Agent shall maintain books (the “Warrant Register”), for
the registration of original issuance and the registration of transfer of the Warrants. Upon the initial issuance of the Warrants, the Warrant Agent shall issue and register the Warrants in the names of the respective holders thereof in such
denominations and otherwise in accordance with instructions delivered to the Warrant Agent by the Company. Ownership of beneficial interests in the Public Warrants shall be shown on, and the transfer of such ownership shall be effected through,
records maintained by institutions that have accounts with The Depository Trust Company (the “Depositary”) (such institution, with respect to a Warrant in its account, a “Participant”). 

If the Depositary subsequently ceases to make its book-entry settlement system available for the Public Warrants, the Company may instruct the
Warrant Agent regarding making other arrangements for book-entry settlement. In the event that the Public Warrants are not eligible for, or it is no longer necessary to have the Public Warrants available in, book-entry form, the Warrant Agent shall
provide written instructions to the Depositary to deliver to the Warrant Agent for cancellation each book-entry Public Warrant, and the Company shall instruct the Warrant Agent to deliver to the Depositary definitive certificates in physical form
evidencing such Warrants (“Definitive Warrant Certificates”) which shall be in the form annexed hereto as Exhibit A. 

Physical certificates, if issued, shall be signed by, or bear the facsimile signature of, the President, Principal Financial Officer,
Principal Accounting Officer, Chief Corporate Development Officer, Chief Legal Officer or Secretary of the Company or other authorized officer of the Company. In the event the person whose facsimile signature has been placed upon any Warrant shall
have ceased to serve in the capacity in which such person signed the Warrant before such Warrant is issued, it may be issued with the same effect as if he or she had not ceased to be such at the date of issuance. 

 

	 	2.3.2	 Registered Holder. Prior to due presentment for registration of transfer of any Warrant, the Company and
the Warrant Agent may deem and treat the person in whose name such Warrant is registered in the Warrant Register (the “Registered Holder”) as the absolute owner of such Warrant and of each Warrant represented thereby
(notwithstanding any notation of ownership or other writing on any physical certificate made by anyone other than the Company or the Warrant Agent), for the purpose of any exercise thereof, and for all other purposes, and neither the Company nor the
Warrant Agent shall be affected by any notice to the contrary. 

  
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	2.4	 Detachability of Warrants. The shares of Common Stock and Public Warrants comprising the Units shall
begin separate trading on the 52nd day following the date of the Prospectus or, if such 52nd day is not on a day, other than a Saturday, Sunday or federal holiday, on which banks in New York City are generally open for normal business (a
“Business Day”), then on the immediately succeeding Business Day following such date, or earlier (the “Detachment Date”) with the consent of Evercore Group L.L.C. and Barclays Capital Inc., but in no event shall the
shares of Common Stock and the Public Warrants comprising the Units be separately traded until (A) the Company has filed a Current Report on Form 8-K with the Commission containing an audited balance
sheet reflecting the receipt by the Company of the gross proceeds of the Offering, including the proceeds then received by the Company from the exercise by the underwriters of their right to purchase additional Units in the Offering (the
“Over-allotment Option”), if the Over-allotment Option is exercised prior to the filing of the Form 8-K, and, (B) if the Detachment Date is earlier than the 52nd day following the
date of the Prospectus, the Company issues a press release announcing when such earlier separate trading shall begin. 

  

	2.5	 Fractional Warrants. The Company shall not issue fractional Warrants other than as part of the Units,
each of which is comprised initially of one share of Series A Common Stock and one-third of one Public Warrant. If, upon the detachment of Public Warrants from the Units or otherwise, a holder of Warrants
would be entitled to receive a fractional Warrant, the Company shall round down to the nearest whole number the number of Warrants to be issued to such holder. 

 

	2.6	 Private Placement Warrants. The Private Placement Warrants shall be identical to the Public Warrants,
except that so long as they are held by the Sponsor or any of its Permitted Transferees (as defined below): (i) the Private Placement Warrants may be exercised for cash or on a cashless basis, pursuant to Section 3.3.1(c) hereof and
(ii) the Private Placement Warrants shall not be redeemable by the Company. Unless waived by the Company, the Private Placement Warrants and any shares of Common Stock issuable upon exercise of the Private Placement Warrants may not be
transferred, assigned or sold until thirty (30) days after the completion by the Company of a Partnering Transaction; provided, however, that the Private Placement Warrants and any shares of Common Stock issued upon exercise of
the Private Placement Warrants may be transferred by the holders thereof: 

  

	 	(a)	 to the Company’s officers or directors, Post’s officers or directors, their respective family members
and entities formed by such persons for investment or estate planning purposes which are controlled by such persons or formed for their benefit or for charitable purposes; 

 

	 	(b)	 to Post or any entity in which Post or the officers and directors of Post hold, in the aggregate, securities
representing no less than 25% of the outstanding voting power of such entity (so long as no other holder or group holds a higher percentage of the voting power of such entity), and the subsidiaries of Post or such entities; 

  
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	 	(c)	 to any corporation or other entity which, as a result of any spinoff, splitoff or other distribution
transaction, becomes the beneficial owner of the Private Placement Warrants (and shares issuable upon the exercise of the Private Placement Warrants); or 

  

	 	(d)	 by private sales or transfers made in connection with the consummation of a Partnering Transaction at prices no
greater than the price at which the securities were originally purchased; 

 provided, however, that in the
case of clauses (a) through (d) these permitted transferees (the “Permitted Transferees”) must enter into a written agreement agreeing to be bound by these transfer restrictions and the other restrictions contained in a certain
letter agreement, by and among the Company, the Sponsor and the Company’s executive officers and directors, dated as of the date of this Agreement, as it may be amended from time to time (the “Letter Agreement”). 

In addition, the Sponsor or its Permitted Transferees will be permitted to pledge or grant a security interest in such securities to secure
bona fide indebtedness or engage in hedging transactions; provided, that the holder thereof retains voting control over such securities prior to delivery of shares upon foreclosure or upon satisfaction of the hedge. In the event of any liquidation
prior to the completion of the Company’s Partnering Transaction or the Company’s completion of a liquidation, merger, stock exchange, reorganization or other similar transaction which results in all of the Company’s public
stockholders having the right to exchange their shares of Common Stock for cash, securities or other property subsequent to the Company’s completion of its Partnering Transaction, the lockup period will be deemed terminated. 

 

	2.7	 Forward Purchase Warrants. The Forward Purchase Warrants shall have the same terms and be in the same
form as the Public Warrants. Except as expressly noted herein, Forward Purchase Warrants shall be treated as Public Warrants under this Agreement. 

  

	3.	 Terms and Exercise of Warrants. 

 

	3.1	 Warrant Price. Upon issuance, each Warrant shall entitle the Registered Holder thereof, subject to the
provisions of such Warrant and of this Agreement, to purchase from the Company the number of shares of Series A Common Stock stated therein, at the price of $11.50 per share of Series A Common Stock, and shall be subject to the adjustments provided
in Section 4 hereof and in the last sentence of this Section 3.1. The term “Warrant Price” as used in this Agreement shall initially mean the price per share of Series A Common Stock (including in cash or by
payment of Warrants pursuant to a “cashless exercise,” to the extent permitted hereunder) described in the prior sentence and such term shall be subject to adjustment as provided in Section 4. The Company in its sole discretion
may lower the Warrant Price at any time prior to the Expiration Date (as defined below) for a period of not less than twenty (20) Business Days, provided, that the Company shall provide at least three (3) Business Days prior written
notice of such reduction to Registered Holders of the Warrants and, provided further that any such reduction shall be identical among all of the Warrants. 

  
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	3.2	 Duration of Warrants. A Warrant may be exercised only during the period (the “Exercise
Period”) (A) commencing on the later of: (i) the date that is thirty (30) days after the first date on which the Company completes a Partnering Transaction, and (ii) the date that is twelve (12) months from the date of
the closing of the Offering, and (B) terminating at the earliest to occur of: (w) 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 Partnering Transaction,
(x) the liquidation of the Company in accordance with the Company’s certificate of incorporation, as amended, restated or amended and restated from time to time, if the Company fails to consummate a Partnering Transaction, and
(y) other than with respect to the Private Placement Warrants then held by the Sponsor or its Permitted Transferees, the Redemption Date (as defined below) as provided in Section 6.3 hereof (the “Expiration Date”);
provided, however, that the exercise of any Warrant shall be subject to the satisfaction of any applicable conditions, as set forth in Section 3.3.2 below, with respect to an effective registration statement or a valid
exemption therefrom being available. Except with respect to the right to receive the Redemption Price (as defined below) (other than with respect to a Private Placement Warrant then held by the Sponsor or its Permitted Transferees) in the event of a
redemption (as set forth in Section 6 hereof), each Warrant (other than a Private Placement Warrant then held by the Sponsor or its Permitted Transferees in the event of a redemption) not exercised on or before the Expiration Date shall
become null and void, and all rights thereunder and all rights in respect thereof under this Agreement shall cease at 5:00 p.m. New York City time on the Expiration Date. The Company in its sole discretion may extend the duration of the Warrants by
delaying the Expiration Date; provided that the Company shall provide at least twenty (20) days prior written notice of any such extension to Registered Holders of the Warrants and, provided further that any such extension shall be identical in
duration among all the Warrants. 

  

	3.3	 Exercise of Warrants. 

 

	 	3.3.1	 Payment. Subject to the provisions of the Warrant and this Agreement, a Warrant may be exercised by the
Registered Holder thereof by delivering to the Warrant Agent at its corporate trust department (i) the Definitive Warrant Certificate evidencing the Warrants to be exercised, or, in the case of a Warrant represented by a book-entry, the
Warrants to be exercised (the “Book-Entry Warrants”) on the records of the Depositary to an account of the Warrant Agent at the Depositary designated for such purposes in writing by the Warrant Agent to the Depositary from time to
time, (ii) an election to purchase (“Election to Purchase”) any shares of Common Stock pursuant to the exercise of a Warrant, properly completed and executed by the Registered Holder on the reverse of the Definitive Warrant
Certificate or, in the case of a Book-Entry Warrant, properly delivered by the Participant in accordance with the Depositary’s procedures, and (iii) the payment in full of the aggregate Warrant Price for all shares of Common Stock as to
which the Warrant is exercised and any and all applicable taxes due in connection with the exercise of the Warrant, the exchange of the Warrant for the shares of Common Stock and the issuance of such shares of Common Stock, as follows:

  
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	 	(a)	 in lawful money of the United States, in good certified check or wire payable to the Warrant Agent;

  

	 	(b)	 in the event of a redemption pursuant to Section 6.1 hereof in which the
Company’s board of directors (the “Board”) has elected to require all holders of the Warrants to exercise such Warrants on a “cashless basis,” by surrendering the Warrants for that number of shares of Series A Common
Stock equal to the lesser of (A) the quotient obtained by dividing (x) the product of the number of shares of Series A Common Stock underlying the Warrants, multiplied by the excess of the “Fair Market Value” (as defined in this
Section 3.3.1(b)) over the Warrant Price by (y) the Fair Market Value and (B) the product of 0.361 and the number of shares of Series A Common Stock underlying the Warrants. Solely for purposes of this
Section 3.3.1(b) and Section 6.4, the “Fair Market Value” shall mean the volume weighted average price of the applicable series of Common Stock for the ten (10) trading days
immediately following the date on which the notice of redemption is sent to the holders of the Warrants, pursuant to Section 6 hereof; 

 

	 	(c)	 with respect to any Private Placement Warrant so long as such Private Placement Warrant is held by the Sponsor
or a Permitted Transferee, by surrendering the Warrants for that number of shares of Series A Common Stock equal to the quotient obtained by dividing (x) the product of the number of shares of Series A Common Stock underlying the Warrants,
multiplied by the excess of the “Sponsor Fair Market Value” (as defined in this Section 3.3.1(c)) over the Warrant Price, by (y) the Sponsor Fair Market Value. Solely for purposes of this
Section 3.3.1(c), the “Sponsor Fair Market Value” shall mean the average last reported sale price of the applicable series of Common Stock for the ten (10) trading days ending on the third trading day
prior to the date on which notice of exercise of the Warrant is sent to the Warrant Agent; 

  

	 	(d)	 [reserved]; or 

  

	 	(e)	 as provided in Section 7.4 hereof; 

provided, however, that this Section 3 shall be adjusted pursuant to
Section 4.1.1(b) following any event described in Section 4.1.1(b) pursuant to which the Warrants become exercisable for shares of Series C Common Stock in addition to shares of Series A Common
Stock, including to provide that exercise of the Warrants on a “cashless basis” would be net of the proportionate number of shares of both Series A Common Stock and Series C Common Stock issuable upon exercise of the Warrants. The Warrant
Agent shall forward funds received for warrant exercises as promptly as practicable after receipt thereof and in any event not later than by the 5th business day of the following month by wire transfer to an account designated by the Company. 

  
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	 	3.3.2	 Issuance of Shares of Common Stock on Exercise. As soon as practicable after the exercise of any Warrant
and the clearance of the funds in payment of the Warrant Price (if payment is pursuant to Section 3.3.1(a)), the Company shall issue to the Registered Holder of such Warrant a book-entry position or certificate, as
applicable, for the number of full shares of Common Stock to which he, she or it is entitled, registered in such name or names as may be directed by him, her or it, and if such Warrant shall not have been exercised in full, a new book-entry position
or countersigned Warrant, as applicable, for the number of shares of Common Stock as to which such Warrant shall not have been exercised. Notwithstanding the foregoing, the Company shall not be obligated to deliver any shares of Common Stock
pursuant to the exercise of a Warrant and shall have no obligation to settle such Warrant exercise unless a (a) registration statement under the Securities Act with respect to the shares of Common Stock underlying the Public Warrants is then
effective and (b) prospectus relating thereto is current, subject to the Company satisfying its obligations under Section 7.4. No Warrant shall be exercisable for cash or on a cashless basis and the Company shall not
be obligated to issue shares of Common Stock to holders seeking to exercise Warrants unless the shares of Common Stock issuable upon such Warrant exercise have been registered, qualified or deemed to be exempt from registration or qualification
under the securities laws of the state of residence of the Registered Holder of the Warrants. Subject to Section 4.7 of this Agreement, a Registered Holder of Public Warrants may exercise its Public Warrants only for a
whole number of shares of Common Stock. In no event will the Company be required to net cash settle the Warrant exercise. The Company may require holders of Public Warrants to settle the Warrant on a “cashless basis” pursuant to
Section 7.4. If, by reason of any exercise of Warrants on a “cashless basis,” the holder of any Warrants would be entitled, upon the exercise of such Warrants, to receive a fractional interest in a share of Common
Stock, the Company shall round down to the nearest whole number, the number of shares of Common Stock to be issued to such holder. 

  

	 	3.3.3	 Valid Issuance. All shares of Common Stock issued upon the proper exercise of a Warrant in conformity
with this Agreement shall be validly issued, fully paid and non-assessable. 

  

	 	3.3.4	 Date of Issuance. Each person in whose name any book-entry position or certificate, as applicable, for
shares of Common Stock is issued shall for all purposes be deemed to have become the holder of record of such shares of Common Stock on the date on which the Warrant, or book-entry position representing such Warrant, was surrendered and payment of
the Warrant Price was made, irrespective of the date of delivery of such certificate in the case of a certificated Warrant, except that, if the date of such surrender and payment is a date when the share transfer books of the Company or book-entry
system of the Warrant Agent are closed, such person shall be deemed to have become the holder of such shares of Common Stock at the close of business on the next succeeding date on which the share transfer books or book-entry system are open.

  

	 	3.3.5	 Maximum Percentage. A holder of a Warrant may notify the Company in writing in the event it elects to be
subject to the provisions contained in this Section 3.3.5; however, no holder of a Warrant shall be subject to this Section 3.3.5 unless he, she or it makes such election. If the election is
made by a holder, such holder shall not 

  
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have the right to exercise such Warrant to the extent that after giving effect to such exercise such person (together with such person’s affiliates), to the Warrant Agent’s actual
knowledge, would beneficially own in excess of 9.8% or such other amount as the holder may specify (the “Maximum Percentage”) of the shares of any series of Common Stock outstanding immediately after giving effect to such exercise.
For purposes of the foregoing sentence, the aggregate number of shares of any series of Common Stock beneficially owned by such person and its affiliates shall include the number of shares of such series of Common Stock issuable upon exercise of the
Warrant with respect to which the determination of such sentence is being made, but shall exclude shares of such series of Common Stock that would be issuable upon (x) exercise of the remaining, unexercised portion of the Warrant beneficially
owned by such person and its affiliates and (y) exercise or conversion of the unexercised or unconverted portion of any other securities of the Company beneficially owned by such person and its affiliates (including, without limitation, any
convertible notes or convertible preferred stock or warrants) subject to a limitation on conversion or exercise analogous to the limitation contained herein. Except as set forth in the preceding sentence, for purposes of this paragraph, beneficial
ownership shall be calculated in accordance with Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). For purposes of the Warrant, in determining the number of outstanding shares of any series
of Common Stock, the holder may rely on the number of outstanding shares of such series of Common Stock as reflected in (1) the Company’s most recent Annual Report on Form 10-K, Quarterly Report on
Form 10-Q, Current Report on Form 8-K or other public filing with the Commission, as the case may be, (2) a more recent public announcement by the Company or
(3) any other notice by the Company or the Company’s transfer agent setting forth the number of shares of such series of Common Stock outstanding. For any reason at any time, upon the written request of the holder of a Warrant who has made
an election under this Section 3.3.5, the Company shall, within two (2) Business Days confirm orally and in writing to such holder the number of shares of any series of Common Stock then outstanding. In any case, the
number of outstanding shares of any series of Common Stock shall be determined after giving effect to the conversion or exercise of equity securities of the Company by the holder and its affiliates since the date as of which such number of
outstanding shares of such series of Common Stock was reported. By written notice to the Company, the holder of a Warrant may from time to time increase or decrease the Maximum Percentage applicable to such holder to any other percentage specified
in such notice; provided, however, that any such increase shall not be effective until the sixty-first (61st) day after such notice is delivered to the Company. 

 

	4.	 Adjustments. 

 

	4.1	 Stock Dividends. 

 

	 	4.1.1	 Stock Splits and Distributions. 

  
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	 	(a)	 If after the date hereof, the number of outstanding shares of Series A Common Stock is increased by a stock
dividend or share distribution to holders of Series A Common Stock payable in shares of Series A Common Stock, or by a stock split of shares of Series A Common Stock or other similar event, then, on the effective date of such stock dividend, stock
split or similar event, the number of shares of Series A Common Stock issuable on exercise of each Warrant will be increased in proportion to such increase in the outstanding shares of Series A Common Stock. 

 

	 	(b)	 If after the date hereof, a stock dividend or other share distribution is made to the holders of Series A
Common Stock consisting of shares of Series C Common Stock, then the terms of the Warrant will be adjusted so that, upon exercise thereof the holder will be entitled to receive, in addition to the shares of Series A Common Stock such holder is
otherwise entitled, such number of shares of Series C Common Stock which such holder would have received had such holder exercised the Warrant in full immediately prior to the record date for such stock dividend or share distribution and held the
applicable number of shares of Series A Common Stock at the time of record date for such stock dividend or share distribution. For the avoidance of doubt, in such event, each Warrant shall become exercisable for a basket of shares consisting of the
same number of shares of Series A Common Stock prior to such dividend or distribution together with the number of whole or fractional shares of Series C Common Stock such holder would have been entitled to receive if it had exercised such warrant
immediately prior to the record date for such dividend or distribution and the Warrant Price will not be adjusted as a result of such dividend or distribution. Immediately following any event described in this
Section 4.1.1(b) pursuant to which the Warrants become exercisable for shares of Series C Common Stock in addition to Series A Common Stock, the terms and provisions of this Agreement, including, without limitation,
Sections 3.1, 3.3, 4.1, 4.2, 4.3, 4.4, 4.5, 6 and 7.4, and the Definitive Warrant Certificates and the form of Election to Purchase contained therein shall be adjusted by the Company to
provide for the shares of Series C Common Stock issuable upon exercise of the Warrants and to effectuate the intent and purpose of this Section 4.1.1(b). 

 

	 	4.1.2	 Series A Rights Offering. If after the date hereof, the Company effects a rights offering (including,
without limitation, by distribution of stock purchase rights, warrants or options (collectively, “Rights”)) to all holders of shares of Series A Common Stock entitling holders to purchase shares of Series A Common Stock at a price
per share less than the “Rights Offering Fair Market Value” (as defined below), and at the time of such Rights offering (or distribution of Rights) each Warrant is exercisable only for Series A Common Stock, then the number of shares of
Series A Common Stock issuable on exercise of each Warrant (the “Warrant Share Number”) shall be increased as of immediately after the open of business on the “Ex-Dividend Date” (as
defined below) based on the following formula: 

  
 

 

  
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 where, 

WS0 = the Warrant Share Number in effect immediately prior to the open
of business on the Ex-Dividend Date for such Rights offering; 
 WS’ = the
Warrant Share Number in effect immediately after the open of business on such Ex-Dividend Date; 

OS0 = the number of shares of Series A Common Stock outstanding
immediately prior to the open of business on such Ex-Dividend Date; 
 X = the total
number of shares of Series A Common Stock issuable pursuant to such Rights that are distributed to holders of Series A Common Stock; and 

Y = the number equal to the aggregate price payable to exercise in full such Rights that are distributed to holders of shares
of Series A Common Stock divided by the Rights Offering Fair Market Value. 
 Such adjustment to Warrant Share Number shall be made
immediately after the opening of business on the Ex-Dividend Date for such distribution. To the extent that shares of Series A Common Stock are not delivered after the expiration of such Rights, the Warrant
Share Number may be readjusted (in the sole discretion of the Board) to the Warrant Share Number that would then be in effect had the adjustment made upon the distribution of such Rights been made on the basis of delivery of only the number of
shares of Series A Common Stock actually delivered pursuant to the Rights. 
 For purposes of this Section 4.1.2,
(i) if the Rights offering is for securities convertible into or exercisable for shares of Series A Common Stock, in determining the price payable for shares of Series A Common Stock, there shall be taken into account any consideration received for
such Rights, as well as any additional amount payable upon exercise or conversion, (ii) “Rights Offering Fair Market Value” means the volume weighted average price per share of the Series A Common Stock as reported during the ten
(10) trading day period ending on, and including, the last trading day prior to the Ex-Dividend Date, and (iii) “Ex-Dividend Date” means the first
date on which the shares of Series A Common Stock trade on the applicable exchange or in the applicable market, regular way, without the right to receive such Rights. 
  

	 	4.1.3	 Other Rights Offering. If after the date hereof, the Company effects a Rights offering (including,
without limitation, by distribution of Rights) (other than a Rights offering described in Section 4.1.2) to all holders of shares of Common Stock entitling holders to purchase shares of the Company’s Common Stock at a
price per share less than the “Other Rights Offering Fair Market Value” (as defined below) applicable thereto, then the Company will cause to be delivered (immediately following the date such Rights are distributed to the holders of Common
Stock) to each holder of Warrants the number and type of Rights such holder would have been entitled to receive had it exercised such Warrant 

  
 11 

	 	
immediately prior to the record date for such Rights distribution and been the holder of the number of shares and series of Common Stock deliverable upon exercise of a Warrant on such record
date. The Rights so delivered to such holder are referred to as the “Pass-Through Securities.” The delivery of Pass-Through Securities to the holders of Warrants as provided herein will be the sole adjustment required in connection
with any such Rights offering. 

 For purposes of this Section 4.1.3, (i) if the Rights offering is
for securities convertible into or exercisable for shares of Common Stock, in determining the price payable for shares of Common Stock, there shall be taken into account any consideration received by the Company for such Rights, as well as any
additional amount payable upon exercise or conversion, (ii) “Other Rights Offering Fair Market Value” means the volume weighted average price of the applicable series of the Company’s common stock as reported on a national
securities exchange during the ten (10) trading day period ending on the last trading day prior to the Ex-Dividend Date, and (iii) “Ex-Dividend
Date” means the first date on which the shares of the applicable series of Common Stock trade on the applicable exchange or in the applicable market, regular way, without the right to receive such Rights. 

 

	 	4.1.4	 Extraordinary Dividends. If the Company, at any time while the Warrants are outstanding and unexpired,
shall pay a dividend or make a distribution in cash, securities or other assets to the holders of the shares of Common Stock on account of such shares of Common Stock, other than (a) as described in Sections 4.1.1, 4.1.2 or 4.1.3 above,
(b) Ordinary Cash Dividends (as defined below), (c) to satisfy the redemption rights of the holders of the shares of Common Stock in connection with a proposed Partnering Transaction, (d) to satisfy the redemption rights of the holders of
the shares of Common Stock in connection with a stockholder vote to amend the Company’s amended and restated certificate of incorporation (i) to modify the substance or timing of the Company’s obligation to allow redemptions in
connection with its Partnering Transaction or to redeem 100% of the Company’s public shares of Series A Common Stock if the Company does not complete its Partnering Transaction within the time period set forth therein or (ii) with respect
to any other provision relating to the Company’s stockholders’ rights or pre-Partnering Transaction activity, or (e) in connection with the redemption of public shares upon the failure of the
Company to complete its Partnering Transaction and any subsequent distribution of its assets upon its liquidation (any such non-excluded event being referred to herein as an “Extraordinary
Dividend”), then the Warrant Price shall be decreased, effective immediately after the effective date of such Extraordinary Dividend, by the amount of cash and/or the fair market value (as determined by the Board, in good faith) of any
securities or other assets paid on each share of Common Stock in respect of such Extraordinary Dividend. For purposes of this Section 4.1.4, “Ordinary Cash Dividends” means any cash dividend or cash
distribution which, when combined on a per share basis with the per share amounts of all other cash dividends and cash distributions paid on the shares of Common Stock during the 365-day period ending on the
date of declaration of such dividend or distribution, does not exceed $0.50 (as adjusted to appropriately reflect any of the events referred to in this Section 4 and excluding cash dividends or cash distributions that
resulted in an adjustment to the Warrant Price or to the number of shares of Common Stock issuable on exercise of each Warrant). 

  
 12 

	4.2	 Aggregation of Shares. If after the date hereof, the number of outstanding shares of a series of Common
Stock is decreased by a consolidation, combination, reverse stock split or reclassification of shares of such series of Common Stock or other similar event, then, on the effective date of such consolidation, combination, reverse stock split,
reclassification or similar event, the number of shares of such series of Common Stock issuable on exercise of each Warrant shall be decreased in proportion to such decrease in outstanding shares of such series of Common Stock.

  

	4.3	 Adjustments in Exercise Price. Except as described in Section 4.1.1(b), whenever the number of
shares of Common Stock purchasable upon the exercise of the Warrants is adjusted, the Warrant Price shall be adjusted (to the nearest cent) by multiplying such Warrant Price immediately prior to such adjustment by a fraction (x) the numerator
of which shall be the number of shares of Common Stock purchasable upon the exercise of the Warrants immediately prior to such adjustment, and (y) the denominator of which shall be the number of shares of Common Stock so purchasable
immediately thereafter. 

  

	4.4	 Raising of Capital in Connection with the Partnering Transaction. If (x) the Company issues
additional shares of Series A Common Stock or equity-linked securities convertible, exercisable or exchangeable for Series A Common Stock, excluding forward purchase units, for capital raising purposes in connection with the closing of its
Partnering Transaction at an issue price or effective issue price of less than $9.20 per share of Series A Common Stock (with such issue price or effective issue price to be determined in good faith by the Board and, in the case of any such issuance
to the Sponsor or its affiliates, without taking into account any shares of Series F common stock, par value $0.0001 per share, of the Company, or Series B Common Stock held by the Sponsor or such affiliates, as applicable, prior to such issuance)
(the “Newly Issued Price”), (y) the aggregate gross proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for the funding of the Company’s Partnering
Transaction on the date of the completion of the Company’s Partnering Transaction (net of redemptions), and (z) the volume-weighted average trading price of shares of Series A Common Stock during the twenty (20) trading
day period starting on the trading day prior to the day on which the Company consummates its Partnering Transaction (such price, the “Market Value”) is below $9.20 per share, the Warrant Price shall be adjusted (to the nearest cent)
to be equal to 115% of the higher of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price described in Section 6.1 shall be adjusted (to the nearest cent) to be equal to 180% of the higher of the
Market Value and the Newly Issued Price. 

  

	4.5	 Replacement of Securities upon Reorganization, etc. In case of any reclassification or reorganization of
the outstanding shares of Common Stock (other than a change under Section 4.1 or Section 4.2 hereof or that solely affects the par value of such shares of Common Stock), or in the case of any merger or consolidation of the
Company with or into another corporation (other than a merger or consolidation in which the Company is the continuing corporation and that does not result in any reclassification or reorganization of

  
 13 

	 	
the outstanding shares of Common Stock), or in the case of any sale or conveyance to another corporation or entity of the assets or other property of the Company as an entirety or substantially
as an entirety in connection with which the Company is dissolved, the holders of the Warrants shall thereafter have the right to purchase and receive, upon the basis and upon the terms and conditions specified in the Warrants and in lieu of the
shares of Common Stock of the Company immediately theretofore purchasable and receivable upon the exercise of the rights represented thereby, the kind and amount of shares of stock or other securities or property (including cash without interest)
receivable upon such reclassification, reorganization, merger or consolidation, or upon a dissolution following any such sale or transfer, that the holder of the Warrants would have received if such holder had exercised his, her or its Warrant(s)
immediately prior to such event (the “Alternative Issuance”); provided, however, that (i) if the holders of the shares of Common Stock were entitled to exercise a right of election as to the kind or amount of
securities, cash or other assets receivable upon such merger or consolidation, then the kind and amount of securities, cash or other assets constituting the Alternative Issuance for which each Warrant shall become exercisable shall be deemed to be
the weighted average of the kind and amount received per share by the holders of the shares of Common Stock in such merger or consolidation that affirmatively make such election, and (ii) if a tender, exchange or redemption offer shall
have been made to and accepted by the holders of the shares of Common Stock (other than a tender, exchange or redemption offer made by the Company in connection with redemption rights held by stockholders of the Company as provided for in the
Company’s amended and restated certificate of incorporation or as a result of the repurchase of shares of Common Stock by the Company if a proposed Partnering Transaction is presented to the stockholders of the Company for approval) under
circumstances in which, upon completion of such tender or exchange offer, the maker thereof, together with members of any group (within the meaning of Rule 13d-5(b)(1) under the Exchange Act (or any successor
rule)) of which such maker is a part, and together with any affiliate or associate of such maker (within the meaning of Rule 12b-2 under the Exchange Act (or any successor rule)) and any members of any such
group of which any such affiliate or associate is a part, own beneficially (within the meaning of Rule 13d-3 under the Exchange Act (or any successor rule)) more than 50% of the outstanding shares of Common
Stock, the holder of a Warrant shall be entitled to receive as the Alternative Issuance, the highest amount of cash, securities or other property to which such holder would actually have been entitled as a stockholder if such Warrant holder had
exercised the Warrant prior to the expiration of such tender or exchange offer, accepted such offer and all of the shares of Common Stock held by such holder had been purchased pursuant to such tender or exchange offer, subject to adjustments (from
and after the consummation of such tender or exchange offer) as nearly equivalent as possible to the adjustments provided for in this Section 4; provided, further, that if less than 70% of the consideration receivable by
the holders of the shares of Common Stock in the applicable event is payable in the form of common stock in the successor entity that is listed for trading on a national securities exchange or is quoted in an established over-the-counter market, or is to be so listed for trading or quoted immediately following such event, and if the Registered Holder properly exercises the Warrant within
thirty (30) days following the public disclosure of the consummation of such applicable event by the Company pursuant to a Current Report on Form 8-K filed with the Commission, the Warrant Price
shall be reduced by an amount 

  
 14 

	 	
(in dollars) equal to the difference of (i) the Warrant Price in effect prior to such reduction minus (ii) (A) the Per Share Consideration (as defined below) (but in no event
less than zero) minus (B) the Black-Scholes Warrant Value (as defined below). The “Black-Scholes Warrant Value” means the value of a Warrant immediately prior to the consummation of the applicable event based on the
Black-Scholes Warrant Model for a Capped American Call on Bloomberg Financial Markets (“Bloomberg”). For purposes of calculating such amount, (1) Section 6 of this Agreement shall be taken into account,
(2) the price of each series of Common Stock shall be the volume weighted average price of such series of Common Stock as reported during the ten (10) trading day period ending on the trading day prior to the effective date
of the applicable event, (3) the assumed volatility shall be the 90 day volatility obtained from the HVT function on Bloomberg determined as of the trading day immediately prior to the day of the announcement of the applicable event, and
(4) the assumed risk-free interest rate shall correspond to the United States Treasury rate for a period equal to the remaining term of the Warrant. “Per Share Consideration” means initially (subject to adjustment
pursuant to Section 4) (i) if the consideration paid to holders of the shares of Series A Common Stock consists exclusively of cash, the amount of such cash per share of Series A Common Stock, and (ii) in all other cases, the
volume weighted average price of the Series A Common Stock as reported during the ten (10) trading day period ending on the trading day prior to the effective date of the applicable event. If any reclassification or reorganization also
results in a change in shares of Series A Common Stock covered by Section 4.1.1 (including, if applicable, to provide for any Series C Common Stock issuable upon exercise of this Warrant), then such adjustment shall be made pursuant to
Section 4.1.1 or Sections 4.2, 4.3, 4.4 and this Section 4.5. The provisions of this Section 4.5 shall similarly apply to successive reclassifications, reorganizations, mergers or
consolidations, sales or other transfers. In no event shall the Warrant Price be reduced to less than the par value per share issuable upon exercise of such Warrant. 

 

	4.6	 Notices of Changes in Warrant. Upon every adjustment of the Warrant Price or the number of shares or
series of Common Stock issuable upon exercise of a Warrant, the Company shall give written notice thereof to the Warrant Agent, which notice shall state the Warrant Price resulting from such adjustment and the adjustment, if any, in the number of
shares or series of Common Stock purchasable at such price upon the exercise of a Warrant, setting forth in reasonable detail the method of calculation and the facts upon which such calculation is based. Upon the occurrence of any event specified in
Sections 4.1, 4.2, 4.3, 4.4 or 4.5, the Company shall give written notice of the occurrence of such event to each holder of a Warrant, at the last address set forth for such holder in the Warrant Register, of the
record date or the effective date of the event. Failure to give such notice, or any defect therein, shall not affect the legality or validity of such event. 

  

	4.7	 No Fractional Shares. Notwithstanding any provision contained in this Agreement to the contrary, the
Company shall not issue fractional shares of Common Stock upon the exercise of Warrants. If, by reason of any adjustment made pursuant to this Section 4, the holder of any Warrants would be entitled, upon the exercise of such Warrants,
to receive a fractional interest in a share, the Company shall, upon such exercise, round down to the nearest whole number the number of shares of Common Stock to be issued to such holder. 

  
 15 

	4.8	 Form of Warrant. The form of Warrant need not be changed because of any adjustment pursuant to this
Section 4, and Warrants issued after such adjustment may state the same Warrant Price and the same number of shares of Common Stock as is stated in the Warrants initially issued pursuant to this Agreement; provided,
however, that the Company may at any time in its sole discretion make any change in the form of Warrant that the Company may deem appropriate and that does not affect the substance thereof, and any Warrant thereafter issued or countersigned,
whether in exchange or substitution for an outstanding Warrant or otherwise, may be in the form as so changed. 

  

	5.	 Transfer and Exchange of Warrants. 

 

	5.1	 Registration of Transfer. The Warrant Agent shall register the transfer, from time to time, of any
outstanding Warrant upon the Warrant Register, upon surrender of such Warrant for transfer, properly endorsed with signatures properly guaranteed and accompanied by appropriate instructions for transfer. Upon any such transfer, a new Warrant
representing an equal aggregate number of Warrants shall be issued and the old Warrant shall be cancelled by the Warrant Agent. In the case of certificated Warrants, the Warrants so cancelled shall be delivered by the Warrant Agent to the Company
from time to time upon request. 

  

	5.2	 Procedure for Surrender of Warrants. Warrants may be surrendered to the Warrant Agent, together with a
written request for exchange or transfer reasonably acceptable to the Warrant Agent, duly executed by the registered holder thereof, or by a duly authorized attorney, and thereupon the Warrant Agent shall issue in exchange therefor one or more new
Warrants as requested by the Registered Holder of the Warrants so surrendered, representing an equal aggregate number of Warrants; provided, however, that except as otherwise provided herein or with respect to any Book-Entry Warrant,
each Book-Entry Warrant may be transferred only in whole and only to the Depositary, to another nominee of the Depositary, to a successor depository, or to a nominee of a successor depository; provided further, however, that in the
event that a Warrant surrendered for transfer bears a restrictive legend (as in the case of the Private Placement Warrants), the Warrant Agent shall not cancel such Warrant and issue new Warrants in exchange thereof until the Warrant Agent has
received an opinion of counsel for the Company stating that such transfer may be made and indicating whether the new Warrants must also bear a restrictive legend. 

 

	5.3	 Fractional Warrants. The Warrant Agent shall not be required to effect any registration of transfer or
exchange which shall result in the issuance of a warrant certificate or book-entry position for a fraction of a warrant, except as part of the Units. 

  

	5.4	 Service Charges. No service charge shall be made for any exchange or registration of transfer of
Warrants except for any tax or other third-party charges imposed in connection therewith. 

  

	5.5	 Warrant Execution and Countersignature. The Warrant Agent is hereby authorized to countersign and to
deliver, in accordance with the terms of this Agreement, the Warrants required to be issued pursuant to the provisions of this Section 5, and the Company, whenever required by the Warrant Agent, shall supply the Warrant Agent with
Warrants duly executed on behalf of the Company for such purpose. 

  
 16 

	5.6	 Transfer of Warrants. Prior to the Detachment Date, the Public Warrants may be transferred or exchanged
only together with the Unit in which such Warrant is included, and only for the purpose of effecting, or in conjunction with, a transfer or exchange of such Unit. Furthermore, each transfer of a Unit on the register relating to such Units shall
operate also to transfer the Warrants included in such Unit. Notwithstanding the foregoing, the provisions of this Section 5.6 shall have no effect on any transfer of Warrants on and after the Detachment Date. 

 

	6.	 Redemption. 

 

	6.1	 Redemption of Warrants when the price per share of Series A Common Stock equals or exceeds $18.00.
Subject to Sections 6.5 hereof, not less than all of the outstanding Warrants may be redeemed, at the option of the Company, at any time while they are exercisable and prior to their expiration, at the office(s) of the Warrant Agent, upon
notice to the Registered Holders of the Warrants, as described in Section 6.3 below, at the price (the “Redemption Price”) of $0.01 per Warrant, provided that (i) the last sales price of the Series A Common
Stock reported has been at least $18.00 per share (such Common Stock and its price subject to adjustment in compliance with Section 4 hereof) on each of twenty (20) trading days, within the thirty (30) trading-day period ending on the third trading day prior to the date on which notice of the redemption is given and (ii) there is an effective registration statement covering the shares of Common
Stock issuable upon exercise of the Warrants, and a current prospectus relating thereto, available throughout the 30-day Redemption Period (as defined in Section 6.3 below) or the Company has
elected to require the exercise of the Warrants on a “cashless basis” pursuant to Section 3.3.1. In connection with any redemption pursuant to this Section 6.1, the Company shall provide notice to the Registered
Holders of the Fair Market Value no later than one (1) Business Day after the end of the ten (10) trading day period described in the definition of Fair Market Value in Section 3.3.1(b). 

 

	6.2	 [Reserved]. 

 

	6.3	 Date Fixed for, and Notice of, Redemption. In the event that the Company elects to redeem all of the
Warrants pursuant to Section 6.1, the Company shall fix a date for the redemption (the “Redemption Date”). Notice of redemption shall be mailed by first class mail, postage prepaid, by the Company not less than thirty
(30) days prior to the Redemption Date (such 30-day period, the “Redemption Period”) to the Registered Holders of the Warrants to be redeemed at their last addresses as they shall appear
on the registration books. Any notice mailed in the manner herein provided shall be conclusively presumed to have been duly given whether or not the Registered Holder received such notice. 

 

	6.4	 Exercise After Notice of Redemption. The Warrants may be exercised, for cash (or on a “cashless
basis” in accordance with Section 3.3.1(b) of this Agreement) at any time after notice of redemption shall have been given by the Company pursuant to Section 6.3 hereof and prior to the Redemption Date. In the event that
the Company determines to require all 

  
 17 

	 	
holders of Warrants to exercise their Warrants on a “cashless basis” pursuant to Section 3.3.1, the notice of redemption shall contain the information necessary to calculate
the number of shares of Common Stock to be received upon exercise of the Warrants, and the Company shall provide the Registered Holders with the Fair Market Value no later than one (1) Business Day after the end of the ten
(10) trading day period described in the definition of Fair Market Value in Section 3.3.1(b). On and after the Redemption Date, the record holder of the Warrants shall have no further rights except to receive, upon surrender
of the Warrants, the Redemption Price. 

  

	6.5	 Exclusion of Private Placement Warrants. The Company agrees that the redemption rights provided in
Section 6.1 shall not apply to the Private Placement Warrants if at the time of the redemption such Private Placement Warrants continue to be held by the initial holder thereof or its Permitted Transferees. Private Placement Warrants
that are transferred to persons other than Permitted Transferees shall upon such transfer cease to be Private Placement Warrants and shall become Public Warrants under this Agreement and shall be subject to redemption on the same basis and subject
to the same terms and conditions as Public Warrants. 

  

	6.6	 [Reserved]. 

  

	7.	 Other Provisions Relating to Rights of Holders of Warrants. 

 

	7.1	 No Rights as Stockholder. Except as set forth in Section 4.1.3, a Warrant does not entitle
the Registered Holder thereof to any of the rights of a stockholder of the Company, including, without limitation, the right to receive dividends, or other distributions, exercise any preemptive rights to vote or to consent or to receive notice as
stockholders in respect of the meetings of stockholders or the election of directors of the Company or any other matter. 

  

	7.2	 Lost, Stolen, Mutilated, or Destroyed Warrants. If any Warrant is lost, stolen, mutilated, or destroyed,
the Company and the Warrant Agent may on such terms as to indemnity or otherwise as they may in their discretion impose (which shall, in the case of a mutilated Warrant, include the surrender thereof), issue a new Warrant of like denomination,
tenor, and date as the Warrant so lost, stolen, mutilated, or destroyed. Any such new Warrant shall constitute a substitute contractual obligation of the Company, whether or not the allegedly lost, stolen, mutilated, or destroyed Warrant shall be at
any time enforceable by anyone. 

  

	7.3	 Reservation of Shares of Common Stock. The Company shall at all times reserve and keep available a
number of its authorized but unissued shares of Common Stock that shall be sufficient to permit the exercise in full of all outstanding Warrants issued pursuant to this Agreement. 

  
 18 

	7.4	 Registration of Shares of Common Stock; Cashless Exercise at Company’s Option.

  

	 	7.4.1	 Registration of Shares of Common Stock. The Company agrees that as soon as practicable, but in no event
later than twenty (20) Business Days after the closing of its Partnering Transaction, it shall use its commercially reasonable efforts to file with the Commission a registration statement for the registration, under the Securities Act of the
shares of Common Stock issuable upon exercise of the Warrants. The Company shall use its commercially reasonable efforts to cause the same to become effective within sixty (60) Business Days after the closing of its Partnering Transaction and
to maintain the effectiveness of such registration statement, and a current prospectus relating thereto, until the expiration or redemption of the Warrants in accordance with the provisions of this Agreement. If any such registration statement has
not been declared effective by the sixtieth (60th) Business Day following the closing of the Partnering Transaction, holders of the Warrants shall have the right, during the period beginning on
the sixty-first (61st) Business Day after the closing of the Partnering Transaction and ending upon such registration statement being declared effective by the Commission, and during any other
period when the Company shall fail to have maintained an effective registration statement covering the issuance of the shares of Common Stock issuable upon exercise of the Warrants, to exercise such Warrants on a “cashless basis,” by
exchanging the Warrants (in accordance with Section 3(a)(9) of the Securities Act (or any successor statute) or another exemption) initially (subject to adjustment pursuant to Section 4) for that number of shares of
Series A Common Stock equal to the lesser of (A) the quotient obtained by dividing (x) the product of the number of shares of Series A Common Stock underlying the Warrants, multiplied by the excess of the “Fair Market Value” (as
defined below) over the Warrant Price by (y) the Fair Market Value and (B) the product of 0.361 and the number of shares of Series A Common Stock underlying the Warrants. Solely for purposes of this Section 7.4.1,
“Fair Market Value” shall mean the volume weighted average price of the applicable series of Common Stock as reported during the ten (10) trading day period ending on the trading day prior to the date that notice of exercise is
received by the Warrant Agent from the holder of such Warrants or its securities broker or intermediary. The date that notice of “cashless exercise” is received by the Warrant Agent shall be conclusively determined by the Warrant Agent. In
connection with the “cashless exercise” of a Public Warrant, the Company shall, upon request, provide the Warrant Agent with an opinion of counsel for the Company (which shall be an outside law firm with securities law experience) stating
that (i) the exercise of the Warrants on a “cashless basis” in accordance with this Section 7.4.1 is not required to be registered under the Securities Act and (ii) the shares of Common Stock issued upon
such exercise shall be freely tradable under United States federal securities laws by anyone who is not an affiliate (as such term is defined in Rule 144 under the Securities Act (or any successor rule)) of the Company and, accordingly, shall not be
required to bear a restrictive legend. Except as provided in Section 7.4.2, for the avoidance of doubt, unless and until all of the Warrants have been exercised or have expired, the Company shall continue to be obligated to
comply with its registration obligations under the first three sentences of this Section 7.4.1. 

  

	 	7.4.2	 Cashless Exercise at Company’s Option. If Common Stock is at the time of any exercise of a Warrant
not listed on a national securities exchange such that it satisfies the definition of a “covered security” under Section 18(b)(1) of the Securities Act (or any successor statute), the Company may, at its option, (i) require

  
 19 

	 	
holders of Public Warrants who exercise Public Warrants to exercise such Public Warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act (or any
successor statute) as described in Section 7.4.1 and (ii) in the event the Company so elects, the Company shall (x) not be required to file or maintain in effect a registration statement for the registration,
under the Securities Act, of the shares of Common Stock issuable upon exercise of the Warrants, notwithstanding anything in this Agreement to the contrary, and (y) use its commercially reasonable efforts to register or qualify for sale the
shares of Common Stock issuable upon exercise of the Public Warrant under applicable blue sky laws to the extent an exemption is not available. 

  

	8.	 Concerning the Warrant Agent and Other Matters. 

 

	8.1	 Payment of Taxes. The Company shall from time to time promptly pay all taxes and charges that may be
imposed upon the Company or the Warrant Agent in respect of the issuance or delivery of shares of Common Stock upon the exercise of the Warrants, but the Company and the Warrant Agent shall not be obligated to pay any transfer taxes in respect of
the Warrants or such shares of Common Stock. 

  

	8.2	 Resignation, Consolidation, or Merger of Warrant Agent. 

 

	 	8.2.1	 Appointment of Successor Warrant Agent. The Warrant Agent, or any successor to it hereafter appointed,
may resign its duties and be discharged from all further duties and liabilities hereunder after giving sixty (60) days’ notice in writing to the Company. If the office of the Warrant Agent becomes vacant by resignation or incapacity to act
or otherwise, the Company shall appoint in writing a successor Warrant Agent in place of the Warrant Agent. If the Company shall fail to make such appointment within a period of thirty (30) days after it has been notified in writing of such
resignation or incapacity by the Warrant Agent or by the holder of a Warrant (who shall, with such notice, submit his, her or its Warrant for inspection by the Company), then the holder of any Warrant may apply to the Supreme Court of the State of
New York for the County of New York for the appointment of a successor Warrant Agent at the Company’s cost. Any successor Warrant Agent, whether appointed by the Company or by such court, shall be a corporation organized and existing under the
laws of the State of New York, in good standing and having its principal office in the Borough of Manhattan, City and State of New York, and authorized under such laws to exercise corporate trust powers and subject to supervision or examination by
federal or state authority. After appointment, any successor Warrant Agent shall be vested with all the authority, powers, rights, immunities, duties, and obligations of its predecessor Warrant Agent with like effect as if originally named as
Warrant Agent hereunder, without any further act or deed; but if for any reason it becomes necessary or appropriate, the predecessor Warrant Agent shall execute and deliver, at the expense of the Company, an instrument transferring to such successor
Warrant Agent all the authority, powers, and rights of such predecessor Warrant Agent hereunder; and upon request of any successor Warrant Agent the Company shall make, execute, acknowledge, and deliver any and all instruments in writing for more
fully and effectually vesting in and confirming to such successor Warrant Agent all such authority, powers, rights, immunities, duties, and obligations. 

  
 20 

	 	8.2.2	 Notice of Successor Warrant Agent. In the event a successor Warrant Agent shall be appointed, the
Company shall give notice thereof to the predecessor Warrant Agent and the Company’s transfer agent for the shares of Common Stock not later than the effective date of any such appointment. 

 

	 	8.2.3	 Merger or Consolidation of Warrant Agent. Any entity into which the Warrant Agent may be merged or with
which it may be consolidated or any entity resulting from any merger or consolidation to which the Warrant Agent shall be a party shall be the successor Warrant Agent under this Agreement without any further act. 

 

	8.3	 Fees and Expenses of Warrant Agent. 

 

	 	8.3.1	 Remuneration. The Company agrees to pay the Warrant Agent reasonable remuneration for its services as
such Warrant Agent hereunder and shall, pursuant to its obligations under this Agreement, reimburse the Warrant Agent upon demand for all expenditures that the Warrant Agent may reasonably incur in the execution of its duties hereunder.

  

	 	8.3.2	 Further Assurances. The Company agrees to perform, execute, acknowledge, and deliver or cause to be
performed, executed, acknowledged, and delivered all such further and other acts, instruments, and assurances as may reasonably be required by the Warrant Agent for the carrying out or performing of the provisions of this Agreement.

  

	8.4	 Liability of Warrant Agent. 

 

	 	8.4.1	 Reliance on Company Statement. Whenever in the performance of its duties under this Agreement, the
Warrant Agent shall deem it necessary or desirable that any fact or matter be proved or established by the Company prior to taking or suffering any action hereunder, such fact or matter (unless other evidence in respect thereof be herein
specifically prescribed) may be deemed to be conclusively proved and established by a statement signed by the President, Principal Financial Officer, Principal Accounting Officer, Chief Corporate Development Officer, Chief Legal Officer or Secretary
of the Company or other authorized officer of the Company and delivered to the Warrant Agent. The Warrant Agent may rely upon such statement for any action taken or suffered in good faith by it pursuant to the provisions of this Agreement.

  

	 	8.4.2	 Indemnity. The Warrant Agent shall be liable hereunder only for its own gross negligence, willful
misconduct or bad faith. The Company agrees to indemnify the Warrant Agent and save it harmless against any and all liabilities, including judgments, costs and reasonable counsel fees, for anything done or omitted by the Warrant Agent in the
execution of this Agreement, except as a result of the Warrant Agent’s gross negligence, willful misconduct or bad faith. 

  
 21 

	 	8.4.3	 Exclusions. The Warrant Agent shall have no responsibility with respect to the validity of this
Agreement or with respect to the validity or execution of any Warrant (except its countersignature thereof). The Warrant Agent shall not be responsible for any breach by the Company of any covenant or condition contained in this Agreement or in any
Warrant. The Warrant Agent shall not be responsible to make any adjustments required under the provisions of Section 4 hereof or responsible for the manner, method, or amount of any such adjustment or the ascertaining of
the existence of facts that would require any such adjustment; nor shall it by any act hereunder be deemed to make any representation or warranty as to the authorization or reservation of any shares of Common Stock to be issued pursuant to this
Agreement or any Warrant or as to whether any shares of Common Stock shall, when issued, be valid and fully paid and non-assessable. 

 

	8.5	 Acceptance of Agency. The Warrant Agent hereby accepts the agency established by this Agreement and
agrees to perform the same upon the terms and conditions herein set forth and among other things, shall account promptly to the Company with respect to Warrants exercised and concurrently account for, and pay to the Company, all monies received by
the Warrant Agent for the purchase of shares of Common Stock through the exercise of the Warrants. 

  

	8.6	 Waiver. The Warrant Agent has no right of set-off or any other
right, title, interest or claim of any kind (“Claim”) in, or to any distribution of, the Trust Account (as defined in that certain Investment Management Trust Agreement, dated as of the date hereof, by and between the Company and
Continental Stock Transfer & Trust Company, as trustee thereunder) and hereby agrees not to seek recourse, reimbursement, payment or satisfaction for any Claim against the Trust Account for any reason whatsoever. The Warrant Agent hereby
waives any and all Claims against the Trust Account and any and all rights to seek access to the Trust Account. 

  

	9.	 Miscellaneous Provisions. 

 

	9.1	 Successors. All the covenants and provisions of this Agreement by or for the benefit of the Company or
the Warrant Agent shall bind and inure to the benefit of their respective successors and assigns. 

  

	9.2	 Notices. Any notice, statement or demand authorized by this Agreement to be given or made by the Warrant
Agent or by the holder of any Warrant to or on the Company shall be sufficiently given when delivered if by hand or overnight delivery or if sent by certified mail or private courier service within five (5) days after deposit of such
notice, addressed (until another address is filed in writing by the Company with the Warrant Agent), as follows: 

 Post
Holdings Partnering Corporation 
 2503 S. Hanley Road 

St. Louis, Missouri 63144 

Attention: Chief Financial Officer 

  
 22 

 Any notice, statement or demand authorized by this Agreement to be given or made by the
holder of any Warrant or by the Company to or on the Warrant Agent shall be sufficiently given when delivered if by hand or overnight delivery or if sent by certified mail or private courier service within five (5) days after deposit of such
notice, addressed (until another address is filed in writing by the Company with the Warrant Agent), as follows: 
 Continental Stock
Transfer & Trust Company 
 One State Street, 30th Floor 

New York, NY 10004 
 Attention:
Compliance Department 
  

	9.3	 Applicable Law and Exclusive Forum. The validity, interpretation, and performance of this Agreement and
of the Warrants shall be governed by and construed in accordance with the laws of the State of Delaware. The Company hereby agrees that any action, proceeding or claim against it arising out of or relating in any way to this Agreement or the
Warrants will be brought and enforced in the courts of the State of Delaware or the United States District Court for the District of Delaware, and irrevocably submits to such jurisdiction, which jurisdictions will be the exclusive forums for any
such action, proceeding or claim. The Company hereby waives any objection to such exclusive jurisdictions and that such courts represent an inconvenient forum. Notwithstanding the foregoing, the provisions of this paragraph will not apply to suits
brought to enforce any liability or duty created by the Exchange Act or any other claim for which the federal district courts of the United States of America are the sole and exclusive forum, and the federal district courts of the United States of
America shall, to the fullest extent permitted by law, be the sole and exclusive forum for the resolution of any complaint asserting such causes of action. 

Any person or entity purchasing or otherwise acquiring any interest in the Warrants shall be deemed to have notice of and to have consented to
the forum provisions in this Section 9.3. If any action, the subject matter of which is within the scope of the forum provisions above, is filed in a court other than the state and federal courts located within the State of
Delaware or the federal district courts of the United States of America, as applicable (a “foreign action”), in the name of any warrant holder, such warrant holder shall be deemed to have consented to: (x) the personal
jurisdiction of the state and federal courts located within the State of Delaware or the federal courts of the United States of America, as applicable, in connection with any action brought in any such court to enforce the forum provisions (an
“enforcement action”), and (y) having service of process made upon such warrant holder in any such enforcement action by service upon such warrant holder’s counsel in the foreign action as agent for such warrant holder.

  

	9.4	 Persons Having Rights under this Agreement. Nothing in this Agreement shall be construed to confer upon,
or give to, any person or corporation other than the parties hereto and the Registered Holders of the Warrants any right, remedy, or claim under or by reason of this Agreement or of any covenant, condition, stipulation, promise, or agreement hereof.
All covenants, conditions, stipulations, promises, and agreements contained in this Agreement shall be for the sole and exclusive benefit of the parties hereto and their successors and assigns and of the Registered Holders of the Warrants.

  
 23 

	9.5	 Examination of the Warrant Agreement. A copy of this Agreement shall be available at all reasonable
times at the office of the Warrant Agent in the Borough of Manhattan, City and State of New York, for inspection by the Registered Holder of any Warrant. The Warrant Agent may require any such holder to submit his Warrant for inspection by it.

  

	9.6	 Counterparts; Electronic Signatures. This Agreement may be executed in any number of original or
facsimile counterparts and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. A signature to this Agreement transmitted electronically
shall have the same authority, effect, and enforceability as an original signature. 

  

	9.7	 Effect of Headings. The section headings herein are for convenience only and are not part of this
Agreement and shall not affect the interpretation thereof. 

  

	9.8	 Amendments. This Agreement may be amended by the parties hereto without the consent of any Registered
Holder for the purpose of (i) curing any ambiguity or to correct any mistake, including to conform the provisions hereof to the description of the terms of the Warrants and this Agreement set forth in the Prospectus, or defective provision
contained herein, (ii) modifying the terms of this Agreement and the Warrants pursuant to Section 4.1.1(b) or (iii) adding or changing any provisions with respect to matters or questions arising under this Agreement as
the parties may deem necessary or desirable and that the parties deem shall not materially adversely affect the rights of the Registered Holders under this Agreement. All other modifications or amendments, including any modification or amendment to
increase the Warrant Price or shorten the Exercise Period and any amendment to the terms of only the Private Placement Warrants or Forward Purchase Warrants, shall require the vote or written consent of the Registered Holders of 50% of the
then-outstanding Public Warrants and, solely with respect to any amendment to the terms of the Private Placement Warrants or Forward Purchase Warrants or any provision of this Agreement with respect to the Private Placement Warrants and Forward
Purchase Warrants, Registered Holders of 50% of the then-outstanding Private Placement Warrants or Forward Purchase Warrants, respectively. Notwithstanding the foregoing, the Company may lower the Warrant Price or extend the duration of the Exercise
Period pursuant to Sections 3.1 and 3.2, respectively, without the consent of the Registered Holders. 

  

	9.9	 Severability. This Agreement shall be deemed severable, and the invalidity or unenforceability of any
term or provision hereof shall not affect the validity or enforceability of this Agreement or of any other term or provision hereof. Furthermore, in lieu of any such invalid or unenforceable term or provision, the parties hereto intend that there
shall be added as a part of this Agreement a provision as similar in terms to such invalid or unenforceable provision as may be possible and be valid and enforceable. 

 

	9.10	 Confidentiality. The Warrant Agent and the Company agree that all books, records, information and data
pertaining to the business of the other party, including inter alia, personal, non-public warrant holder information, which are exchanged or received pursuant to the negotiation or the carrying out of
this Agreement, including the fees for services, shall remain confidential, and shall not be voluntarily disclosed to any other person, except as may be required by law or regulation, including, without limitation, pursuant to requests from the
Securities and Exchange Commission and subpoenas from state or federal government authorities (e.g., in divorce and criminal actions). 

  
 24 

 Exhibit A Form of Warrant Certificate 

Exhibit B Legend — Sponsor’s Warrants 

  
 25 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of
the date first above written. 
  

			
	POST HOLDINGS PARTNERING CORPORATION
		
	By:	 	/s/ Robert V. Vitale
	Name:	 	Robert V. Vitale
	Title:	 	President and Chief Investment Officer
	
	CONTINENTAL STOCK TRANSFER & TRUST COMPANY, AS WARRANT AGENT
		
	By:	 	/s/ Ana Gois
	Name:	 	Ana Gois
	Title:	 	Vice President

  
 [Signature Page to
Warrant Agreement] 

 Exhibit A 

Form of Warrant Certificate 

[FACE] 
 Number 

Warrants 
 THIS WARRANT SHALL BE NULL AND
VOID IF NOT EXERCISED PRIOR TO THE EXPIRATION OF THE EXERCISE PERIOD PROVIDED FOR IN THE WARRANT AGREEMENT DESCRIBED BELOW 
 Post Holdings
Partnering Corporation 
 Incorporated Under the Laws of the State of Delaware 

CUSIP 737465 112 
 Warrant
Certificate 
 This Warrant Certificate certifies that , or registered assigns, is the registered holder of warrant(s) evidenced
hereby (the “Warrants” and each, a “Warrant”) to purchase shares of Series A common stock, $0.0001 par value per share (“Series A Common Stock”), of Post Holdings Partnering Corporation, 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 Series A 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 Series A
Common Stock. No fractional shares will be issued upon exercise of any Warrant. If, upon the exercise of Warrant, a holder would be entitled to receive a fractional interest in a share, the Company will, upon exercise, round down to the nearest
whole number of the number of shares of Series A Common Stock to be issued to the holder. The number of shares of Series 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 Exercise Price per share of Series A Common Stock for any Warrant is equal to $11.50 per
whole 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 null and void. 

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 Delaware. 
  

			
	POST HOLDINGS PARTNERING CORPORATION

 
			
		
	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 Series A Common Stock and are issued or to be issued pursuant to a Warrant Agreement dated as of May 28,
2021 (the “Warrant Agreement”), duly executed and delivered by the Company to Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (or successor warrant agent) (collectively, 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 designated office(s) 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 shares of Series A Common Stock to be issued upon exercise is effective under the Securities Act and (ii) a prospectus thereunder relating to the shares of Series 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 Series 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 Series A Common Stock, the Company shall, upon exercise, round down to the nearest whole number of shares of Series A Common Stock to be issued to the holder of the Warrant. 

Warrant Certificates, when surrendered at the designated office(s) 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(s) 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 third-party charges 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. 

  
 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 shares of Series A Common
Stock and herewith tenders payment for such shares of Series A Common Stock to the order of Post Holdings Partnering Corporation (the “Company”) in the amount of $ in accordance with the terms hereof. The undersigned requests that a
certificate for such shares of Series A Common Stock be registered in the name of , whose address is and that such shares of Series A Common Stock be delivered to whose address is . If said number of shares of Series A Common Stock is less than all
of the shares of Series A Common Stock purchasable hereunder, the undersigned requests that a new Warrant Certificate representing the remaining balance of such shares of Series 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 6.1 of the Warrant
Agreement and the Company has required cashless exercise pursuant to Section 6.4 of the Warrant Agreement, the number of shares of Series A Common Stock that this Warrant is exercisable for shall be determined in accordance
with Section 3.3.1(b) and Section 6.4 of the Warrant Agreement. 
 In the event that the
Warrant is a Private Placement Warrant that is to be exercised on a “cashless” basis pursuant to Section 3.3.1(c) of the Warrant Agreement, the number of shares of Series A Common Stock that this Warrant is
exercisable for shall be determined in accordance with Section 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 Series 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 Series 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 Series A Common Stock. If said number of shares of Series A Common Stock is less than all of the shares of Series 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 Series A Common Stock be registered in the name
of                 , whose address is                 , and that such Warrant Certificate
be delivered to                 , whose address is                 . 

 Date: 
  

	
	   

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

  
 6 

 Exhibit B 

LEGEND 
 THE SECURITIES REPRESENTED HEREBY
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 POST HOLDINGS PARTNERING CORPORATION (THE
“COMPANY”), PHPC SPONSOR 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
PARTNERING TRANSACTION (AS DEFINED IN 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 HEREBY AND SHARES OF COMMON STOCK OF THE COMPANY ISSUED UPON EXERCISE OF SUCH SECURITIES SHALL BE ENTITLED TO REGISTRATION RIGHTS
UNDER A REGISTRATION RIGHTS AGREEMENT TO BE EXECUTED BY THE COMPANY.EX-10.1

 Exhibit 10.1 

INVESTMENT MANAGEMENT TRUST AGREEMENT 

This Investment Management Trust Agreement (this “Agreement”) is made effective as of May 28, 2021, by and
between Post Holdings Partnering Corporation, a Delaware Corporation (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation (the “Trustee”). 

WHEREAS, the Company’s registration statement on Form S-1, File No. 333-252910 (the “Registration Statement”), and prospectus (the “Prospectus”) for the initial public offering of the Company’s units (the
“Units”), each of which consists of one of the Company’s Series A common stock, par value $0.0001 per share (the “Common Stock”), and one-third of one
redeemable warrant, each whole warrant entitling the holder thereof to purchase one share of Common Stock (such initial public offering hereinafter referred to as the “Offering”), has been declared effective as of the date
hereof by the United States Securities and Exchange Commission; and 
 WHEREAS, the Company has entered into an Underwriting
Agreement (the “Underwriting Agreement”) with Evercore Group L.L.C. and Barclays Capital Inc., as representatives (the “Representatives”) of the several underwriters (the
“Underwriters”) named therein; and 
 WHEREAS, as described in the Prospectus, $300,000,000 of the gross
proceeds of the Offering and sale of the Private Placement Units (as defined in the Underwriting Agreement) (or $345,000,000 if the Underwriters’ over-allotment option is exercised in full) will be delivered to the Trustee to be deposited and
held in a segregated trust account located at all times in the United States (the “Trust Account”) for the benefit of the Company and the holders of shares of Common Stock included in the Units issued in the Offering as
hereinafter provided (the amount to be delivered to the Trustee (and any interest subsequently earned thereon) is referred to herein as the “Property,” the stockholders for whose benefit the Trustee shall hold the
Property will be referred to as the “Public Stockholders,” and the Public Stockholders and the Company will be referred to together as the “Beneficiaries”); and 

WHEREAS, pursuant to the Underwriting Agreement, a portion of the Property equal to $10,500,000, or $12,075,000 if the
Underwriters’ over-allotment option is exercised in full, is attributable to deferred underwriting discounts and commissions that may be payable by the Company to the Underwriters upon the consummation of the Partnering Transaction (as defined
below) (the “Deferred Discount”); and 
 WHEREAS, the Company and the Trustee desire to enter into this
Agreement to set forth the terms and conditions pursuant to which the Trustee shall hold the Property. 

 NOW THEREFORE, IT IS AGREED: 

1. Agreements and Covenants of Trustee. The Trustee hereby agrees and covenants to: 

(a) Hold the Property in trust for the Beneficiaries in accordance with the terms of this Agreement in the Trust Account established by the
Trustee located in the United States at J.P. Morgan Chase Bank, N.A. (or at another United States chartered commercial bank with consolidated assets of $100 billion or more) and at a brokerage institution selected by the Trustee that is
reasonably satisfactory to the Company; 
 (b) Manage, supervise and administer the Trust Account subject to the terms and conditions set
forth herein; 
 (c) In a timely manner, upon the written instruction of the Company, invest and reinvest the Property in United States
government securities within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, having a maturity of 185 days or less, or in money market funds meeting the conditions of paragraphs (d)(1), (d)(2), (d)(3) and
(d)(4) of Rule 2a-7 promulgated under the Investment Company Act of 1940, as amended, which invest only in direct United States government treasury obligations, as determined by the Company; it being
understood that the Trust Account will earn no interest while account funds are uninvested awaiting the Company’s instructions hereunder; while on deposit, the Trustee may earn bank credits or other consideration; 

(d) Collect and receive, when due, all interest or other income arising from the Property, which shall become part of the
“Property,” as such term is used herein; 
 (e) Promptly notify the Company and the Representatives of all communications received
by the Trustee with respect to any Property requiring action by the Company; 
 (f) Supply any necessary information or documents as may be
requested by the Company (or its authorized agents) in connection with the Company’s preparation of tax returns relating to assets held in the Trust Account or in connection with the preparation or completion of the audit of the Company’s
financial statements by the Company’s auditors; 
 (g) Participate in any plan or proceeding for protecting or enforcing any right or
interest arising from the Property if, as and when instructed by the Company to do so; 
 (h) Render to the Company monthly written
statements of the activities of, and amounts in, the Trust Account reflecting all receipts and disbursements of the Trust Account; 
 (i)
Commence liquidation of the Trust Account only after and promptly after (x) receipt of, and only in accordance with, the terms of a letter from the Company (“Termination Letter”) in a form substantially similar to that
attached hereto as either Exhibit A or Exhibit B signed on behalf of the Company by its President, Principal Financial Officer, Principal Accounting Officer, Chief Corporate Development Officer, Chief Legal Officer or Secretary of the Company or
other authorized officer of the Company, and complete the liquidation of the Trust Account and distribute the Property in the Trust Account, including interest (which interest shall be net of taxes payable, and less up to $100,000 of interest may be
released to the Company to pay dissolution expenses, it being understood that the Trustee has no obligation to monitor or question the Company’s position that an allocation has been made for taxes payable), only as directed in the Termination
Letter and the other documents referred to therein; provided, that, in the case a 

  
 2 

 
Termination Letter in the form of Exhibit A is received, or (y) upon the date which is twenty-four (24) months after the closing of the Offering (or twenty- seven (27) months from
the closing of the Offering if the Company has executed a letter of intent, agreement in principle or definitive agreement for a Partnering Transaction within twenty-four (24) months from the closing of the Offering but has not completed a
Partnering Transaction within such twenty-four (24) month period), or such later date as may be approved by the Company’s stockholders in accordance with the Company’s amended and restated certificate of incorporation, as it may be
amended from time to time, if a Termination Letter has not been received by the Trustee prior to such date, in which case the Trust Account shall be liquidated in accordance with the procedures set forth in the Termination Letter attached as Exhibit
B and the Property in the Trust Account, including interest (which interest shall be net of taxes payable, and less up to $100,000 of interest may be released to the Company to pay dissolution expenses), shall be distributed to the Public
Stockholders of record as of such date; 
 (j) Upon written request from the Company, which may be given from time to time in a form
substantially similar to that attached hereto as Exhibit C (a “Tax Payment Withdrawal Instruction”), withdraw from the Trust Account and distribute to the Company the amount of interest earned on the Property requested by the
Company to cover any tax obligation owed by the Company as a result of assets of the Company or interest or other income earned on the Property, which amount shall be delivered directly to the Company by electronic funds transfer or other method of
prompt payment, and the Company shall forward such payment to the relevant taxing authority; provided, however, that to the extent there is not sufficient cash in the Trust Account to pay such tax obligation, the Trustee shall
liquidate such assets held in the Trust Account as shall be designated by the Company in writing to make such distribution so long as there is no reduction in the principal amount per share initially deposited in the Trust Account; provided,
further, however, that if the tax to be paid is a franchise tax, the written request by the Company to make such distribution shall be accompanied by a copy of the franchise tax bill for the Company (it being acknowledged and agreed
that any such amount in excess of interest income earned on the Property shall not be payable from the Trust Account). The written request of the Company referenced above shall constitute presumptive evidence that the Company is entitled to said
funds, and the Trustee shall have no responsibility to look beyond said request; 
 (k) Upon written request from the Company, which may be
given from time to time in a form substantially similar to that attached hereto as Exhibit D (a “Stockholder Redemption Withdrawal Instruction”), the Trustee shall distribute on behalf of the Company the amount requested by
the Company to be used to redeem shares of Common Stock from Public Stockholders properly submitted in connection with a stockholder vote to approve an amendment to the Company’s amended and restated certificate of incorporation (A) to
modify the substance or timing of the Company’s obligation to allow redemption in connection with the Company’s initial merger, share exchange, asset acquisition, share purchase, reorganization or similar partnering transaction involving
the Company and one or more businesses (a “Partnering Transaction”) or to redeem 100% of the Company’s public shares if it does not complete its Partnering Transaction within twenty-four (24) months from the closing
of the Offering (or twenty-seven (27) months from the closing of the Offering if the Company has executed a letter of intent, agreement in principle or definitive agreement for a Partnering Transaction within twenty-four (24) months from
the closing of the Offering but has not completed a Partnering Transaction within such twenty-four (24) month period) or (B) with respect to any other provision relating to stockholders’ rights or
pre-Partnering Transaction activity. The written request of the Company referenced above shall constitute presumptive evidence that the Company is entitled to distribute said funds, and the Trustee shall have
no responsibility to look beyond said request; and 

  
 3 

 (l) Not make any withdrawals or distributions from the Trust Account other than pursuant to
Section 1(i), (j) or (k) above. 
 2. Agreements and Covenants of the Company. The Company hereby agrees and covenants to:

 (a) Give all instructions to the Trustee hereunder in writing, signed by the Company’s President, Principal Financial Officer,
Principal Accounting Officer, Chief Corporate Development Officer, Chief Legal Officer, Secretary or other authorized officer of the Company. In addition, except with respect to its duties under Sections 1(i), 1(j) and 1(k)
hereof, the Trustee shall be entitled to rely on, and shall be protected in relying on, any verbal or telephonic advice or instruction which it, in good faith and with reasonable care, believes to be given by any one of the persons authorized above
to give written instructions, provided that the Company shall promptly confirm such instructions in writing; 
 (b) Subject to
Section 4 hereof, hold the Trustee harmless and indemnify the Trustee from and against any and all reasonable and documented expenses, including reasonable outside counsel fees and disbursements, or losses suffered by the Trustee in connection
with any action taken by it hereunder and in connection with any action, suit or other proceeding brought against the Trustee involving any claim, or in connection with any claim or demand, which in any way arises out of or relates to this
Agreement, the services of the Trustee hereunder, or the Property or any interest earned on the Property, except for expenses and losses resulting from the Trustee’s gross negligence, fraud or willful misconduct. Promptly after the receipt by
the Trustee of notice of demand or claim or the commencement of any action, suit or proceeding, pursuant to which the Trustee intends to seek indemnification under this Section 2(b), it shall notify the Company in writing
of such claim (hereinafter referred to as the “Indemnified Claim”). The Trustee shall have the right to conduct and manage the defense against such Indemnified Claim; provided that the Trustee shall obtain the consent of the
Company with respect to the selection of counsel, which consent shall not be unreasonably withheld. The Trustee may not agree to settle any Indemnified Claim without the prior written consent of the Company, which such consent shall not be
unreasonably withheld. The Company may participate in such action with its own counsel; 
 (c) Pay the Trustee the fees set forth on
Schedule A hereto, including an initial acceptance fee, annual administration fee, and transaction processing fee which fees shall be subject to modification by the parties from time to time. It is expressly understood that the Property shall not be
used to pay such fees unless and until it is distributed to the Company pursuant to Sections 1(i) through 1(j) hereof. The Company shall pay the Trustee the initial acceptance fee and the first annual administration fee at the
consummation of the Offering. The Company shall not be responsible for any other fees or charges of the Trustee except as set forth in this Section 2(c) and as may be provided in Section 2(b) hereof; 

(d) In connection with any vote of the Company’s stockholders regarding a Partnering Transaction, provide to the Trustee an affidavit or
certificate of the inspector of elections for the stockholder meeting verifying the vote of such stockholders regarding such Partnering Transaction; 

  
 4 

 (e) Provide the Representatives with a copy of any Termination Letter(s) and/or any other
correspondence that is sent to the Trustee with respect to any proposed withdrawal from the Trust Account promptly after it issues the same; 

(f) Expressly provide in any Instruction Letter (as defined in Exhibit A) delivered in connection with a Termination Letter in the Form of
Exhibit A that the Deferred Discount be paid directly to the account or accounts directed by the Representatives; and 
 (g) Instruct the
Trustee to make only those distributions that are permitted under this Agreement, and refrain from instructing the Trustee to make any distributions that are not permitted under this Agreement. 

3. Limitations of Liability. The Trustee shall have no responsibility or liability to: 

(a) Imply obligations, perform duties, inquire or otherwise be subject to the provisions of any agreement or document other than this Agreement
and that which is expressly set forth herein; 
 (b) Take any action with respect to the Property, other than as directed in Section 1
hereof, and the Trustee shall have no liability to any party except for liability arising out of the Trustee’s gross negligence, fraud or willful misconduct; 

(c) Institute any proceeding for the collection of any principal and income arising from, or institute, appear in or defend any proceeding of
any kind with respect to, any of the Property unless and until it shall have received instructions from the Company given as provided herein to do so and the Company shall have advanced or guaranteed to it funds sufficient to pay any expenses
incident thereto; 
 (d) Refund any depreciation in principal of any Property; 

(e) Assume that the authority of any person designated by the Company to give instructions hereunder shall not be continuing unless provided
otherwise in such designation, or unless the Company shall have delivered a written revocation of such authority to the Trustee; 
 (f) The
other parties hereto or to anyone else for any action taken or omitted by it, or any action suffered by it to be taken or omitted, in good faith and in the Trustee’s best judgment, except for the Trustee’s gross negligence, fraud or
willful misconduct. The Trustee may rely conclusively and shall be protected in acting upon any order, notice, demand, certificate, opinion or advice of counsel (including counsel chosen by the Trustee with written notification to the Company, which
counsel may be the Company’s counsel), statement, instrument, report or other paper or document (not only as to its due execution and the validity and effectiveness of its provisions, but also as to the truth and acceptability of any
information therein contained) which the Trustee believes, in good faith and with reasonable care, to be genuine and to be signed or presented by the proper person or persons. The Trustee shall not be bound by any notice or demand, or any waiver,
modification, termination or rescission of this Agreement or any of the terms hereof, unless evidenced by a written instrument delivered to the Trustee, signed by the proper party or parties and, if the duties or rights of the Trustee are affected,
unless it shall give its prior written consent thereto; 

  
 5 

 (g) Verify the accuracy of the information contained in the Registration Statement; 

(h) Provide any assurance that any Partnering Transaction entered into by the Company or any other action taken by the Company is as
contemplated by the Registration Statement; 
 (i) File information returns with respect to the Trust Account with any local, state or
federal taxing authority or provide periodic written statements to the Company documenting the taxes payable by the Company, if any, relating to any interest income earned on the Property; 

(j) Prepare, execute and file tax reports, income or other tax returns and pay any taxes with respect to any income generated by, and
activities relating to, the Trust Account, regardless of whether such tax is payable by the Trust Account or the Company, including, but not limited to, franchise and income tax obligations, except pursuant to Section 1(j) hereof; or 

(k) Verify calculations, qualify or otherwise approve the Company’s written requests for distributions pursuant to Sections 1(i),
1(j) or 1(k) hereof. 
 4. Trust Account Waiver. The Trustee has no right of
set-off or any right, title, interest or claim of any kind (“Claim”) to, or to any monies in, the Trust Account, and hereby irrevocably waives any Claim to, or to any monies in, the
Trust Account that it may have now or in the future. In the event the Trustee has any Claim against the Company under this Agreement, including, without limitation, under Section 2(b) or
Section 2(c) hereof, the Trustee shall pursue such Claim solely against the Company and its assets outside the Trust Account and not against the Property or any monies in the Trust Account. 

5. Termination. This Agreement shall terminate as follows: 

(a) If the Trustee gives written notice to the Company that it desires to resign under this Agreement, the Company shall use its reasonable
efforts to locate a successor trustee, pending which the Trustee shall continue to act in accordance with this Agreement. At such time that the Company notifies the Trustee that a successor trustee has been appointed and has agreed to become subject
to the terms of this Agreement (whether following the Trustee giving notice that it desires to resign under this Agreement or the Company otherwise electing to replace the Trustee under this Agreement), the Trustee shall transfer the management of
the Trust Account to the successor trustee, including but not limited to the transfer of copies of the reports and statements relating to the Trust Account, whereupon this Agreement shall terminate; provided, however, that in the event
that the Company does not locate a successor trustee within ninety (90) days of receipt of the resignation notice from the Trustee, the Trustee may submit an application to have the Property deposited with any court in the State of New York or
with the United States District Court for the Southern District of New York and upon such deposit, the Trustee shall be immune from any liability whatsoever; 

  
 6 

 (b) At such time that the Trustee has completed the liquidation of the Trust Account and its
obligations in accordance with the provisions of Section 1(i) hereof and distributed the Property in accordance with the provisions of the Termination Letter, this Agreement shall terminate except with respect to Section 2(b); or 

(c) If the Offering is not consummated within ten (10) business days of the date of this Agreement, in which case any funds received by
the Trustee from the Company or PHPC Sponsor, LLC for purposes of funding the Trust Account shall be promptly returned to the Company or PHPC Sponsor, LLC, as applicable. 

6. Miscellaneous. 
 (a) The
Company and the Trustee each acknowledge that the Trustee will follow the security procedures set forth below with respect to funds transferred from the Trust Account. The Company and the Trustee will each restrict access to confidential information
relating to such security procedures to authorized persons. Each party must notify the other party immediately if it has reason to believe unauthorized persons may have obtained access to such confidential information, or of any change in its
authorized personnel. In executing funds transfers, the Trustee shall rely upon all information supplied to it by the Company, including, account names, account numbers, and all other identifying information relating to a Beneficiary,
Beneficiary’s bank or intermediary bank. Except for any liability arising out of the Trustee’s gross negligence, fraud or willful misconduct, the Trustee shall not be liable for any loss, liability or out-of-pocket expense resulting from any error in the information or transmission of the funds. 

(b) This Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York. 

(c) This Agreement contains the entire agreement and understanding of the parties hereto with respect to the subject matter hereof. Except for
Section 1(i), 1(j) and 1(k) hereof (which sections may not be modified, amended or deleted without the affirmative vote of sixty-six and 2/3rds percent (662⁄3%) of the then outstanding shares of Common Stock, Series B shares of common stock of the Company, par value $0.0001 per share, and Series F shares of common stock of
the Company, par value $0.0001 per share, voting together as a single class; provided that no such amendment will affect any Public Stockholder who has otherwise indicated his, her or its election to redeem his, her or its shares of Common Stock in
connection with a stockholder vote sought to amend this Agreement), this Agreement or any provision hereof may only be changed, amended or modified (other than to correct a typographical error) by a writing signed by each of the parties hereto. 

(d) The parties hereto consent to the jurisdiction and venue of any state or federal court located in the City of New York, State of New York,
for purposes of resolving any disputes hereunder. AS TO ANY CLAIM, CROSS-CLAIM OR COUNTERCLAIM IN ANY WAY RELATING TO THIS AGREEMENT, EACH PARTY WAIVES THE RIGHT TO TRIAL BY JURY. 

  
 7 

 (e) Any notice, consent or request to be given in connection with any of the terms or
provisions of this Agreement shall be in writing and shall be sent by express mail or similar private courier service, by certified mail (return receipt requested), by hand delivery, by electronic mail: 

if to the Trustee, to: 

Continental Stock Transfer & Trust Company 

One State Street, 30th Floor 

New York, New York 10004 
 Attn:
Francis Wolf and Celeste Gonzalez 
 E-mail: fwolf@continentalstock.com 

E-mail: cgonzalez@continentalstock.com 

if to the Company, to: 
 Post
Holdings Partnering Corporation 
 2503 S. Hanley Road 

St. Louis, Missouri 63144 

Attn: Brad Harper 
 Email:
brad.harper@postholdings.com 
 in each case, with copies to: 

Kirkland & Ellis LLP 

300 N. LaSalle 
 Chicago,
Illinois 60654 
 Attn: Christian Nagler 

Wayne Williams 

Email: cnagler@kirkland.com 

  wwilliams@kirkland.com 

and 
 Evercore Group L.L.C. 

55 East 52nd Street, Ste 35 

New York, New York 10055 
 Attn:
Kenneth Masotti 
 Email: masotti@evercore.com 

and 
 Bayclays Capital Inc. 

745 Seventh Avenue 
 New York,
New York 10019 
 Attn: Syndicate Registration 

  
 8 

 and 

David Polk & Wardell LLP 

450 Lexington Avenue 
 New York,
New York, 10017 
 Attn: Derek Dostal 

Deanna Kirkpatrick 

Email: derek.dostal@davispolk.com 

  deanna.kirkpatrick@davispolk.com 

This Agreement may not be assigned by the Trustee without the prior consent of the Company. 

(f) Each of the Company and the Trustee hereby represents that it has the full right and power and has been duly authorized to enter into this
Agreement and to perform its respective obligations as contemplated hereunder. The Trustee acknowledges and agrees that it shall not make any claims or proceed against the Trust Account, including by way of
set-off, and shall not be entitled to any funds in the Trust Account under any circumstance. 
 (g)
This Agreement is the joint product of the Trustee and the Company and each provision hereof has been subject to the mutual consultation, negotiation and agreement of such parties and shall not be construed for or against any party hereto. 

(h) This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts
shall together constitute one and the same instrument. Delivery of a signed counterpart of this Agreement by facsimile or electronic transmission shall constitute valid and sufficient delivery thereof. 

(i) Each of the Company and the Trustee hereby acknowledges and agrees that the Representatives on behalf of the Underwriters are third party
beneficiaries of this Agreement. 
 (j) Except as specified herein, no party to this Agreement may assign its rights or delegate its
obligations hereunder to any other person or entity. 
 [Signature page follows] 

  
 9 

 IN WITNESS WHEREOF, the parties have duly executed this Investment Management Trust
Agreement as of the date first written above. 
  

			
	Continental Stock Transfer & Trust Company, as Trustee
		
	By:	 	/s/ Francis Wolf
	Name:	 	Francis Wolf
	Title:	 	Vice President

  

			
	Post Holdings Partnering Corporation
		
	By:	 	/s/ Robert V. Vitale
	Name:	 	Robert V. Vitale
	Title:	 	President and Chief Investment Officer

 [Signature Page to Investment Management Trust Agreement] 

 SCHEDULE A 
  

							
	Fee Item	  	Time and method of payment	  	Amount	 
	 Initial acceptance fee
	  	Initial closing of the Offering by wire transfer.	  	$	3,500.00	 
	 Annual fee
	  	First year fee payable at initial closing of the Offering by wire transfer, thereafter on the anniversary of the effective date of the Offering by wire transfer or check.	  	$	10,000.00	 
	 Transaction processing fee for disbursements to Company under Sections 1(i) and 1(j)
	  	Billed to Company following disbursement made to Company under Sections 1(i) and 1(j)	  	$	250.00	 
	 Paying Agent services as required pursuant to Section 1(i) and 1(k)
	  	Billed to Company upon delivery of service pursuant to Section 1(i) and 1(k)	  	 	Prevailing rates	 

  
 Schedule A-1 

 EXHIBIT A 

[Letterhead of Company] 

[Insert date] 
 Continental Stock
Transfer & Trust Company 
 One State Street, 30th Floor 

New York, New York 10004 
 Attn: Francis Wolf & Celeste
Gonzalez 
  

	Re:	 Trust Account—Termination Letter 

Dear Mr. Wolf and Ms. Gonzalez: 

Pursuant to Section 1(i) of the Investment Management Trust Agreement between Post Holdings Partnering Corporation
(the “Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of May 28, 2021 (the “Trust Agreement”), this is to advise you that the
Company has entered into an agreement with             (the “Target Business”) to consummate a merger, share exchange, asset acquisition, share purchase,
reorganization or similar partnering transaction with the Target Business (the “Partnering Transaction”) on or about [insert date]. The Company shall notify you at least
seventy-two (72) hours in advance of the actual date (or such shorter time period as you may agree) of the consummation of the Partnering Transaction (“Consummation Date”).
Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement. 
 In accordance with the terms of
the Trust Agreement, we hereby authorize you to commence to liquidate all of the assets of the Trust Account and to transfer the proceeds into the above-referenced trust operating account at J.P. Morgan Chase Bank, N.A. to the effect that, on the
Consummation Date, all of the funds held in the Trust Account will be immediately available for transfer to the account or accounts that Evercore Group L.L.C. and Barclays Capital Inc. (the “Representatives”) (with respect to
the Deferred Discount) and the Company shall direct on the Consummation Date. It is acknowledged and agreed that while the funds are on deposit in the trust operating account at J.P. Morgan Chase Bank, N.A. awaiting distribution, neither the Company
nor the Representatives will earn any interest. 
 On the Consummation Date (i) counsel for the Company shall deliver to you written
notification that the Partnering Transaction has been consummated, or will be consummated substantially, concurrently with your transfer of funds to the accounts as directed by the Company (the “Notification”) and
(ii) the Company shall deliver to you (a) a certificate of the President, which verifies that the Partnering Transaction has been approved by a vote of the Company’s stockholders, if a vote is held and (b) joint written
instruction signed by the Company and the Representatives with respect to the transfer of the funds held in the Trust Account, including payment of the Deferred Discount from the Trust Account (the “Instruction Letter”). You
are hereby directed and authorized to transfer the funds held in the Trust Account immediately upon your receipt of the Notification and the Instruction Letter, in accordance with the terms of the Instruction Letter. In the event that certain
deposits held in the Trust Account may not be liquidated by the Consummation Date without penalty, you will notify the Company in writing of the same 

  
 A-1 

 
and the Company shall direct you as to whether such funds should remain in the Trust Account and be distributed after the Consummation Date to the Company. Upon the distribution of all the funds,
net of any payments necessary for reasonable unreimbursed expenses related to liquidating the Trust Account, your obligations under the Trust Agreement shall be terminated. 

In the event that the Partnering Transaction is not consummated on the Consummation Date described in the notice thereof and we have not
notified you on or before the original Consummation Date of a new Consummation Date, then upon receipt by the Trustee of written instructions from the Company, the funds held in the Trust Account shall be reinvested as provided in Section 1(c)
of the Trust Agreement on the business day immediately following the Consummation Date as set forth in the notice as soon thereafter as possible. 
  

			
	Very truly yours,
	
	Post Holdings Partnering Corporation

 
			
		
	By:	 	 
	Name:	 	 
	 Title:
	 	 

	cc:	 Evercore Group L.L.C. 

Barclays Capital Inc. 

  
 A-2 

 EXHIBIT B 

[Letterhead of Company] 

[Insert date] 
 Continental Stock
Transfer & Trust Company 
 One State Street, 30th Floor 

New York, New York 10004 
 Attn: Francis Wolf & Celeste
Gonzalez 
  

	Re:	 Trust Account—Termination Letter 

Dear Mr. Wolf and Ms. Gonzalez: 

Pursuant to Section 1(i) of the Investment Management Trust Agreement between Post Holdings Partnering Corporation
(the “Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of May 28, 2021 (the “Trust Agreement”), this is to advise you that the
Company has been unable to effect a merger, share exchange, asset acquisition, share purchase, reorganization or similar partnering transaction with a target business (the “Partnering Transaction”) within the time frame
specified in the Company’s amended and restated certificate of incorporation, as described in the Company’s Prospectus relating to the Offering. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust
Agreement. 
 In accordance with the terms of the Trust Agreement, we hereby authorize you to liquidate all of the assets in the trust
operating account and to transfer the total proceeds into the trust operating account at J.P. Morgan Chase Bank, N.A. to await distribution to the Public Stockholders. The Company has selected
            as the effective date for the purpose of determining when the Public Stockholders will be entitled to receive their share of the liquidation proceeds. You agree to be the Paying
Agent of record and, in your separate capacity as Paying Agent, agree to distribute said funds directly to the Company’s Public Stockholders in accordance with the terms of the Trust Agreement and the amended and restated certificate of
incorporation of the Company. Upon the distribution of all the funds, your obligations under the Trust Agreement shall be terminated, except to the extent otherwise provided in Section 1(j) of the Trust Agreement. 

 

			
	Very truly yours,
	
	Post Holdings Partnering Corporation

 
			
		
	By:	 	 
	Name:	 	 
	 Title:
	 	 

  

	cc:	 Evercore Group L.L.C. 

Barclays Capital Inc. 

  
 B-1 

 EXHIBIT C 

[Letterhead of Company] 

[Insert date] 
 Continental Stock
Transfer & Trust Company 
 One State Street, 30th Floor 

New York, New York 10004 
 Attn: Francis Wolf & Celeste
Gonzalez 
  

	Re:	 Trust Account—Tax Payment Withdrawal Instruction 

Dear Mr. Wolf and Ms. Gonzalez: 

Pursuant to Section 1(j) of the Investment Management Trust Agreement between Post Holdings Partnering Corporation
(the “Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of May 28, 2021 (the “Trust Agreement”), the Company hereby requests that
you deliver to the Company $             of the interest income earned on the Property as of the date hereof. Capitalized terms used but not defined herein shall have the meanings set forth
in the Trust Agreement. 
 The Company needs such funds to pay for the tax obligations as set forth on the attached tax return or tax
statement. In accordance with the terms of the Trust Agreement, you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter to the Company’s operating account at: 

[WIRE INSTRUCTION INFORMATION] 
  

			
	Very truly yours,
	
	Post Holdings Partnering Corporation

 
			
		
	By:	 	 
	Name:	 	 
	 Title:
	 	 

  

	cc:	 Evercore Group L.L.C. 

Barclays Capital Inc. 

  
 C-1 

 EXHIBIT D 

[Letterhead of Company] 

[Insert date] 
 Continental Stock
Transfer & Trust Company 
 One State Street, 30th Floor 

New York, New York 10004 
 Attn: Francis Wolf & Celeste
Gonzalez 
 Dear Mr. Wolf and Ms. Gonzalez: 
  

	Re:	 Trust Account—Stockholder Redemption Withdrawal Instruction 

Pursuant to Section 1(k) of the Investment Management Trust Agreement between Post Holdings Partnering Corporation (the
“Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), dated as of May 28, 2021 (the “Trust Agreement”), the Company hereby requests that you
deliver to the redeeming Public Stockholders on behalf of the Company $             of the principal and interest income earned on the Property as of the date hereof. Capitalized terms used
but not defined herein shall have the meanings set forth in the Trust Agreement. 
 The Company needs such funds to pay its Public
Stockholders who have properly elected to have their shares of Common Stock redeemed by the Company in connection with a stockholder vote to approve an amendment to the Company’s amended and restated certificate of incorporation (A) to
modify the substance or timing of the Company’s obligation to allow redemption in connection with the Company’s Partnering Transaction or to redeem 100% of the Company’s public shares if it does not complete its Partnering Transaction
within such time as is described in the Company’s amended and restated certificate of incorporation or (B) with respect to any other provision relating to stockholders’ rights or pre-Partnering
Transaction activity. As such, you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter to the redeeming Public Stockholders in accordance with your customary procedures. 

 

			
	Very truly yours,
	
	Post Holdings Partnering Corporation

 
			
		
	By:	 	 
	Name:	 	 
	 Title:
	 	 

  

	cc:	 Evercore Group L.L.C. 

Barclays Capital Inc. 

  
 D-1

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