Document:

Exhibit 10.1

 

PRIVATE PLACEMENT WARRANT PURCHASE AGREEMENT

 

THIS PRIVATE PLACEMENT WARRANTS
PURCHASE AGREEMENT, dated as of October 27, 2021 (as it may from time to time be amended, this “Agreement”), is entered
into by and between Seaport Calibre Materials Acquisition Corp., a Delaware corporation (the “Company”) and SGAM Sponsor
Sub, LLC, a Delaware limited liability company (the “Purchaser”).

 

WHEREAS:

 

The Company intends to consummate
an initial public offering of the Company’s units (the “Public Offering”), each unit consisting of one share
of Class A common stock of the Company, par value $0.0001 per share (each, a “Share”), and one-half of one redeemable
warrant;

 

Each whole warrant entitles
the holder to purchase one Share at an exercise price of $11.50 per Share; and

 

The Purchaser has agreed to
purchase an aggregate of 2,585,000 warrants (or up to 2,799,500 warrants to the extent the underwriters’ over-allotment option is
exercised) (the “Private Placement Warrants”), each Private Placement Warrant entitling the holder to purchase one
Share at an exercise price of $11.50 per Share.

 

NOW THEREFORE, in consideration
of the mutual promises contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the parties to this Agreement hereby, intending legally to be bound, agree as follows:

 

AGREEMENT

 

Section 1.  Authorization, Purchase
and Sale; Terms of the Private Placement Warrants.

 

A. Authorization
of the Private Placement Warrants.  The Company has duly authorized the issuance and sale of the Private Placement Warrants to
the Purchaser.

 

B. Purchase
and Sale of the Private Placement Warrants.

 

(i)  Simultaneously with
the consummation of the Public Offering or on such earlier time and date as may be mutually agreed by the Purchaser and the Company (the
 “Initial Closing Date”), the Company shall issue and sell to the Purchaser, and the Purchaser shall purchase from the
Company, an aggregate of 2,585,000 Private Placement Warrants at a price of $1.50 per warrant for an aggregate purchase price of $3,877,500
(the “Purchase Price”). Purchaser shall pay the Purchase Price by wire transfer of immediately available funds to the
trust account (the “Trust Account”) maintained by Continental Stock Transfer & Trust Company, acting as trustee
(“Continental”), at least one (1) business day prior to the date of effectiveness (the “Effective Date”)
of the registration statement relating to the Public Offering (the “Registration Statement”).  On the Initial
Closing Date, upon the payment by the Purchaser of the Purchase Price, the Company shall either, at its option, deliver a certificate
evidencing the Private Placement Warrants purchased by the Purchaser on such date duly registered in the Purchaser’s name to the
Purchaser, or effect such delivery in book-entry form. 

 

(ii) In the event that
the underwriters’ over-allotment option is exercised in full or in part, the Purchaser shall purchase up to an additional
214,500 Private Placement Warrants (the “Additional Private Placement Warrants”), in the same proportion as the
amount of the over-allotment option that is so exercised, and simultaneously with such purchase of Additional Private Placement
Warrants, as payment in full for the Additional Private Placement Warrants being purchased hereunder, and at least one (1) business
day prior to the closing of such portion of the underwriters’ over-allotment option, Purchaser shall pay $1.50 per Additional
Private Placement Warrant, up to an aggregate amount of $321,750, by wire transfer of immediately available funds or by such other
method as may be reasonably acceptable to the Company, to the Trust Account. The closing of the purchase and sale of the Additional
Private Placement Warrants, if applicable, shall take place simultaneously with the closing of all or any portion of the
underwriters’ over-allotment option (such closing date, together with the Initial Closing Date, the “Closing
Dates” and each, a “Closing Date”). The closing of the purchase and sale of the Additional Private
Placement Warrants, if applicable, shall take place at the offices of Paul Hastings LLP, counsel for the Company, or such other
place as may be agreed upon by the parties hereto.

 

     

     

    

 

C. Terms
of the Private Placement Warrants.

 

(i)  Each Private Placement
Warrant shall have the terms set forth in a Warrant Agreement to be entered into by the Company and Continental in connection with the
Public Offering (the “Warrant Agreement”). Such terms include the fact that the Private Placement Warrants shall not
be transferable, assignable or salable until (x) 30 days after the completion of an initial business combination, subject to certain exceptions
set forth in the Warrant Agreement or (y) in compliance with FINRA Rule 5110(e), to the extent such date falls within the 180-day period
immediately following commencement of sales of the Offering, after the 180-day period immediately following commencement of sales of the
Offering, subject to certain exceptions permitted by FINRA Rule 5110(e)(2).

 

(ii)  On or prior to
the Initial Closing Date, the Company and the Purchaser shall enter into a registration and shareholder rights agreement (the “Registration
and Shareholder Rights Agreement”) pursuant to which the Company will grant certain registration rights to the Purchaser relating
to the Private Placement Warrants and the Shares underlying the Private Placement Warrants.

 

Section 2.  Representations and Warranties
of the Company.  As a material inducement to the Purchaser to enter into this Agreement and purchase the Private Placement Warrants,
the Company hereby represents and warrants to the Purchaser (which representations and warranties shall survive the applicable Closing
Date) that:

 

A. Incorporation
and Corporate Power.  The Company is a corporation duly incorporated, validly existing and in good standing under the laws of
the State of Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected
to have a material adverse effect on the financial condition, operating results or assets of the Company.  The Company possesses
all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement and the Warrant Agreement.

 

B. Authorization;
No Breach.

 

(i)  The execution, delivery
and performance of this Agreement and the Private Placement Warrants have been duly authorized by the Company as of the applicable Closing
Date.  This Agreement constitutes the valid and binding obligation of the Company, enforceable in accordance with its terms. 
Upon issuance in accordance with, and payment pursuant to, the terms of the Warrant Agreement and this Agreement, the Private Placement
Warrants will constitute valid and binding obligations of the Company, enforceable in accordance with their terms.

 

(ii)  The execution and
delivery by the Company of this Agreement and the Private Placement Warrants, the issuance and sale of the Private Placement Warrants,
the issuance of the Shares upon exercise of the Private Placement Warrants and the fulfillment, of and compliance with, the respective
terms hereof and thereof by the Company, do not and will not as of the applicable Closing Date (a) conflict with or result in a breach
of the terms, conditions or provisions of, (b) constitute a default under, (c) result in the creation of any lien, security
interest, charge or encumbrance upon the Company’s share capital or assets under, (d) result in a violation of, or (e) require
any authorization, consent, approval, exemption or other action by or notice or declaration to, or filing with, any court or administrative
or governmental body or agency pursuant to the amended and restated certificate of incorporation or the bylaws of the Company (in effect
on the date hereof or as may be amended prior to completion of the contemplated Public Offering), or any material law, statute, rule or
regulation to which the Company is subject, or any agreement, order, judgment or decree to which the Company is subject, except for any
filings required after the date hereof under federal or state securities laws.

 

C. Title
to Securities.  Upon issuance in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement, the
Private Placement Warrants will be duly and validly issued and the Shares issuable upon exercise of the Private Placement Warrants
will be duly and validly issued as fully paid and nonassessable. On the date of issuance of the Private Placement Warrants, the
Shares issuable upon exercise of the Private Placement Warrants shall have been reserved for issuance. Upon issuance in accordance
with, and payment pursuant to, the terms hereof and the Warrant Agreement, the Purchaser will have good title to the Private
Placement Warrants and the Shares issuable upon exercise of such Private Placement Warrants, free and clear of all liens, claims and
encumbrances of any kind, other than (i) transfer restrictions hereunder and under the other agreements contemplated hereby,
(ii) transfer restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances imposed due to
the actions of the Purchaser.

 

     

     

    

 

D. Valid
Issuance. The total number of shares of all classes of capital stock which the Company has authority to issue is 221,000,000 shares
of common stock (which consist of 200,000,000 shares of the Company’s Class A Common Stock, par value $0.0001 per share (the “Class
A Common Stock”) and 20,000,000 shares of the Company’s Class B common stock, par value $0.0001 per share (the “Class
B Common Stock”)) and 1,000,000 shares of the Company’s preferred stock, par value $0.0001, per share (the “Preferred
Stock”). As of the date hereof, the Company has issued and outstanding no shares of Class A Common Stock, 4,312,500 shares of
Class B Common Stock (of which up to 562,500 shares are subject to forfeiture as described in the Registration Statement) and no shares
of Preferred Stock. All of the issued shares of capital stock of the Company have been duly authorized, validly issued, and are fully
paid and non-assessable.

 

E. Governmental
Consents.  No permit, consent, approval or authorization of, or declaration to or filing with, any governmental authority is
required in connection with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company
of any other transactions contemplated hereby.

 

Section 3.  Representations and Warranties
of the Purchaser.  As a material inducement to the Company to enter into this Agreement and issue and sell the Private Placement
Warrants to the Purchaser, the Purchaser hereby represents and warrants to the Company (which representations and warranties shall survive
the applicable Closing Date) that:

 

A. Organization
and Requisite Authority.  The Purchaser possesses all requisite power and authority necessary to carry out the transactions contemplated
by this Agreement.

 

B. Authorization;
No Breach.

 

(i)  This Agreement constitutes
a valid and binding obligation of the Purchaser, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent
conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’ rights and to
general equitable principles (whether considered in a proceeding in equity or law).

 

(ii)  The execution and
delivery by the Purchaser of this Agreement and the fulfillment of and compliance with the terms hereof by the Purchaser does not and
shall not as of the applicable Closing Date conflict with or result in a breach by the Purchaser of the terms, conditions or provisions
of any agreement, instrument, order, judgment or decree to which the Purchaser is subject that would materially impact its ability to
perform its obligations hereunder.

 

C. Investment
Representations.

 

(i)  The Purchaser is
acquiring the Private Placement Warrants and, upon exercise of the Private Placement Warrants, the Shares issuable upon such exercise
(collectively, the “Securities”), for the Purchaser’s own account, for investment purposes only and not with
a view towards, or for resale in connection with, any public sale or distribution thereof.

 

(ii)  The Purchaser is
an “accredited investor” as such term is defined in Rule 501(a)(3) of Regulation D under the Securities Act of 1933,
as amended (the “Securities Act”).

 

(iii)  The Purchaser
understands that the Securities are being offered and will be sold to it in reliance on specific exemptions from the registration requirements
of the United States federal and state securities laws and that the Company is relying upon the truth and accuracy of, and the Purchaser’s
compliance with, the representations and warranties of the Purchaser set forth herein in order to determine the availability of such exemptions
and the eligibility of the Purchaser to acquire such Securities.

 

     

     

    

 

(iv)  The Purchaser did
not enter into this Agreement as a result of any general solicitation or general advertising within the meaning of Rule 502(c) under
the Securities Act.

 

(v)  The Purchaser has
been furnished with all materials relating to the business, finances and operations of the Company and materials relating to the offer
and sale of the Securities which have been requested by the Purchaser.  The Purchaser has been afforded the opportunity to ask questions
of the executive officers and directors of the Company.  The Purchaser understands that its investment in the Securities involves
a high degree of risk and it has sought such accounting, legal and tax advice as it has considered necessary to make an informed investment
decision with respect to the acquisition of the Securities.

 

(vi)  The Purchaser understands
that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation
or endorsement of the Securities or the fairness or suitability of the investment in the Securities by the Purchaser nor have such authorities
passed upon or endorsed the merits of the offering of the Securities.

 

(vii)  The Purchaser
understands that: (a) the Securities have not been and are not being registered under the Securities Act or any state securities
laws, and may not be offered for sale, sold, assigned or transferred unless (1) subsequently registered thereunder or (2) sold
in reliance on an exemption therefrom; and (b) except as specifically set forth in the Registration and Shareholder Rights Agreement,
neither the Company nor any other person is under any obligation to register the Securities under the Securities Act or any state securities
laws or to comply with the terms and conditions of any exemption thereunder.  The Private Placement Warrants will bear a legend and
appropriate “stop transfer” instructions (or an appropriate notation if the warrants are issued in book entry form) relating
to the foregoing. The Purchaser further understands that the U.S. Securities and Exchange Commission (the “SEC”) has
taken the position that promoters or affiliates of a blank check company and their transferees, both before and after an initial business
combination, are deemed to be “underwriters” under the Securities Act when reselling the securities of a blank check company. 
Based on that position, Rule 144 adopted pursuant to the Securities Act would not be available for resale transactions of the Securities
until the one-year anniversary following consummation of an initial business combination despite technical compliance with the requirements
of such Rule.

 

(viii)  The Purchaser
has such knowledge and experience in financial and business matters, knows of the high degree of risk associated with investments in the
securities of companies in the development stage such as the Company, is capable of evaluating the merits and risks of an investment in
the Securities and is able to bear the economic risk of an investment in the Securities in the amount contemplated hereunder for an indefinite
period of time.  The Purchaser has adequate means of providing for its current financial needs and contingencies and will have no
current or anticipated future needs for liquidity which would be jeopardized by the investment in the Securities.  The Purchaser
can afford a complete loss of its investment in the Securities.

 

Section 4.  Conditions of the Purchaser’s
Obligations.  The obligations of the Purchaser to purchase and pay for the Private Placement Warrants are subject to the fulfillment,
on or before the applicable Closing Date, of each of the following conditions:

 

A. Representations
and Warranties.  The representations and warranties of the Company contained in Section 2 shall be true and correct at and
as of the applicable Closing Date as though then made.

 

B. Performance. 
The Company shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required
to be performed or complied with by it on or before the applicable Closing Date.

 

C. No Injunction. 
No litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated
or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority
over the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or the
Warrant Agreement.

 

     

     

    

 

D. Warrant Agreement
and Registration and Shareholder Rights Agreement.  The Company shall have entered into the Warrant Agreement and the Registration
and Shareholder Rights Agreement, each on terms satisfactory to the Purchaser.

 

E. Corporate Consents.
The Company shall have obtained the consent of its Board of Directors authorizing the execution, delivery and performance of this Agreement,
the Warrant Agreement and the issuance and sale of the Private Placement Warrants hereunder.

 

Section 5.  Conditions of the Company’s
Obligations.  The obligations of the Company to the Purchaser under this Agreement are subject to the fulfillment, on or before
the applicable Closing Date, of each of the following conditions:

 

A. Representations
and Warranties.  The representations and warranties of the Purchaser contained in Section 3 shall be true and correct at
and as of the applicable Closing Date as though then made.

 

B. Performance. 
The Purchaser shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required
to be performed or complied with by the Purchaser on or before the applicable Closing Date.

 

C. No Injunction. 
No litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated
or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority
over the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or the
Warrant Agreement.

 

D. Warrant
Agreement.  The Company shall have entered into the Warrant Agreement.

 

Section 6.  Termination. 
This Agreement may be terminated at any time after December 31, 2021 upon the election by either the Company or the Purchaser solely as
to itself upon written notice to the other party if the initial closing of the Public Offering does not occur prior to such date.

 

Section 7.  Survival of Representations
and Warranties.  All of the representations and warranties contained herein shall survive the applicable Closing Date.

 

Section 8.  Definitions. 
Terms used but not otherwise defined in this Agreement shall have the meaning assigned to such terms in the Registration Statement.

 

Section 9.  Miscellaneous.

 

A. Successors
and Assigns.  Except as otherwise expressly provided herein, all covenants and agreements contained in this Agreement by or on
behalf of any of the parties hereto shall bind and inure to the benefit of the respective successors of the parties hereto whether so
expressed or not.  Notwithstanding the foregoing or anything to the contrary herein, the parties may not assign this Agreement without
the prior written consent of the other party hereto, other than assignments by the Purchaser to affiliates thereof.

 

B. Severability. 
Whenever possible, each provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable
law, but if any provision of this Agreement is held to be prohibited by or invalid under applicable law, such provision shall be ineffective
only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement.

 

C. Counterparts. 
This Agreement may be executed simultaneously in two or more counterparts, none of which need contain the signatures of more than one
party, but all such counterparts taken together shall constitute one and the same agreement. In the event that any signature is delivered
by facsimile transmission or by e-mail delivery of a “.pdf” format data file, such signature shall create a valid and binding
obligation of the party executing (or on behalf of such signature is executed) with the same force and effect as if such facsimile or
 “.pdf” signature page were an original thereof.

 

     

     

    

 

D. Descriptive
Headings; Interpretation.  The descriptive headings of this Agreement are inserted for convenience only and do not constitute
a substantive part of this Agreement.  The use of the word “including” in this Agreement shall be by way of example
rather than by limitation.

 

E. Governing
Law.  This Agreement shall be deemed to be a contract made under the laws of the State of New York and for all purposes shall
be construed in accordance with the internal laws of the State of New York, without regard to the conflicts of laws principles thereof.

 

F. Amendments. 
This Agreement may not be amended, modified or waived as to any particular provision, except by a written instrument executed by all parties
hereto.

 

[Signature page follows]

 

     

     

    

 

IN WITNESS WHEREOF,
the parties hereto have executed this Agreement to be effective as of the date first set forth above.

 

	 	COMPANY:
	 	 
	 	SEAPORT CALIBRE MATERIALS ACQUISITION CORP.
	 	 
	 	By:	/s/ Jim Tumulty
	 	 	Name: 	Jim Tumulty
	 	 	Title:	Chief Executive Officer
	 	 
	 	PURCHASER:
	 	 
	 	SGAM SPONSOR SUB,  LLC
	 	 
	 	By:	/s/ Stephen Smith
	 	 	Name:	Stephen Smith
	 	 	Title:	Chief Executive Officer of Managing Member

 

[Signature page to Private Placement Warrants
Purchase Agreement]Exhibit 10.2

 

PRIVATE PLACEMENT WARRANT PURCHASE AGREEMENT

 

THIS PRIVATE PLACEMENT WARRANTS
PURCHASE AGREEMENT, dated as of October 27, 2021 (as it may from time to time be amended, this “Agreement”), is entered
into by and between Seaport Calibre Materials Acquisition Corp., a Delaware corporation (the “Company”) and Calibre
Sponsor Sub, LLC, a Delaware limited liability company (the “Purchaser”).

 

WHEREAS:

 

The Company intends to consummate
an initial public offering of the Company’s units (the “Public Offering”), each unit consisting of one share
of Class A common stock of the Company, par value $0.0001 per share (each, a “Share”), and one-half of one redeemable
warrant;

 

Each whole warrant entitles
the holder to purchase one Share at an exercise price of $11.50 per Share; and

 

The Purchaser has agreed to
purchase an aggregate of 2,115,000 warrants (or up to 2,290,500 warrants to the extent the underwriters’ over-allotment option is
exercised) (the “Private Placement Warrants”), each Private Placement Warrant entitling the holder to purchase one
Share at an exercise price of $11.50 per Share.

 

NOW THEREFORE, in consideration
of the mutual promises contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the parties to this Agreement hereby, intending legally to be bound, agree as follows:

 

AGREEMENT

 

Section 1.  Authorization, Purchase
and Sale; Terms of the Private Placement Warrants.

 

A. Authorization
of the Private Placement Warrants.  The Company has duly authorized the issuance and sale of the Private Placement Warrants to
the Purchaser.

 

B. Purchase
and Sale of the Private Placement Warrants.

 

(i)  Simultaneously with
the consummation of the Public Offering or on such earlier time and date as may be mutually agreed by the Purchaser and the Company (the
 “Initial Closing Date”), the Company shall issue and sell to the Purchaser, and the Purchaser shall purchase from the
Company, an aggregate of 2,115,000 Private Placement Warrants at a price of $1.50 per warrant for an aggregate purchase price of $$3,172,500
(the “Purchase Price”). Purchaser shall pay the Purchase Price by wire transfer of immediately available funds to the
trust account (the “Trust Account”) maintained by Continental Stock Transfer & Trust Company, acting as trustee
(“Continental”), at least one (1) business day prior to the date of effectiveness (the “Effective Date”)
of the registration statement relating to the Public Offering (the “Registration Statement”).  On the Initial
Closing Date, upon the payment by the Purchaser of the Purchase Price, the Company shall either, at its option, deliver a certificate
evidencing the Private Placement Warrants purchased by the Purchaser on such date duly registered in the Purchaser’s name to the
Purchaser, or effect such delivery in book-entry form. 

 

(ii) In the event that
the underwriters’ over-allotment option is exercised in full or in part, the Purchaser shall purchase up to an additional
175,500 Private Placement Warrants (the “Additional Private Placement Warrants”), in the same proportion as the
amount of the over-allotment option that is so exercised, and simultaneously with such purchase of Additional Private Placement
Warrants, as payment in full for the Additional Private Placement Warrants being purchased hereunder, and at least one (1) business
day prior to the closing of such portion of the underwriters’ over-allotment option, Purchaser shall pay $1.50 per Additional
Private Placement Warrant, up to an aggregate amount of $$263,250, by wire transfer of immediately available funds or by such other
method as may be reasonably acceptable to the Company, to the Trust Account. The closing of the purchase and sale of the Additional
Private Placement Warrants, if applicable, shall take place simultaneously with the closing of all or any portion of the
underwriters’ over-allotment option (such closing date, together with the Initial Closing Date, the “Closing
Dates” and each, a “Closing Date”). The closing of the purchase and sale of the Additional Private
Placement Warrants, if applicable, shall take place at the offices of Paul Hastings LLP, counsel for the Company, or such other
place as may be agreed upon by the parties hereto.

 

     

     

    

 

C. Terms
of the Private Placement Warrants.

 

(i)  Each Private Placement
Warrant shall have the terms set forth in a Warrant Agreement to be entered into by the Company and Continental in connection with the
Public Offering (the “Warrant Agreement”). Such terms include the fact that the Private Placement Warrants shall not
be transferable, assignable or salable until (x) 30 days after the completion of an initial business combination, subject to certain exceptions
set forth in the Warrant Agreement or (y) in compliance with FINRA Rule 5110(e), to the extent such date falls within the 180-day period
immediately following commencement of sales of the Offering, after the 180-day period immediately following commencement of sales of the
Offering, subject to certain exceptions permitted by FINRA Rule 5110(e)(2).

 

(ii)  On or prior to
the Initial Closing Date, the Company and the Purchaser shall enter into a registration and shareholder rights agreement (the “Registration
and Shareholder Rights Agreement”) pursuant to which the Company will grant certain registration rights to the Purchaser relating
to the Private Placement Warrants and the Shares underlying the Private Placement Warrants.

 

Section 2.  Representations and Warranties
of the Company.  As a material inducement to the Purchaser to enter into this Agreement and purchase the Private Placement Warrants,
the Company hereby represents and warrants to the Purchaser (which representations and warranties shall survive the applicable Closing
Date) that:

 

A. Incorporation
and Corporate Power.  The Company is a corporation duly incorporated, validly existing and in good standing under the laws of
the State of Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected
to have a material adverse effect on the financial condition, operating results or assets of the Company.  The Company possesses
all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement and the Warrant Agreement.

 

B. Authorization;
No Breach.

 

(i)  The execution, delivery
and performance of this Agreement and the Private Placement Warrants have been duly authorized by the Company as of the applicable Closing
Date.  This Agreement constitutes the valid and binding obligation of the Company, enforceable in accordance with its terms. 
Upon issuance in accordance with, and payment pursuant to, the terms of the Warrant Agreement and this Agreement, the Private Placement
Warrants will constitute valid and binding obligations of the Company, enforceable in accordance with their terms.

 

(ii)  The execution and
delivery by the Company of this Agreement and the Private Placement Warrants, the issuance and sale of the Private Placement Warrants,
the issuance of the Shares upon exercise of the Private Placement Warrants and the fulfillment, of and compliance with, the respective
terms hereof and thereof by the Company, do not and will not as of the applicable Closing Date (a) conflict with or result in a breach
of the terms, conditions or provisions of, (b) constitute a default under, (c) result in the creation of any lien, security
interest, charge or encumbrance upon the Company’s share capital or assets under, (d) result in a violation of, or (e) require
any authorization, consent, approval, exemption or other action by or notice or declaration to, or filing with, any court or administrative
or governmental body or agency pursuant to the amended and restated certificate of incorporation or the bylaws of the Company (in effect
on the date hereof or as may be amended prior to completion of the contemplated Public Offering), or any material law, statute, rule or
regulation to which the Company is subject, or any agreement, order, judgment or decree to which the Company is subject, except for any
filings required after the date hereof under federal or state securities laws.

 

C. Title
to Securities.  Upon issuance in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement, the
Private Placement Warrants will be duly and validly issued and the Shares issuable upon exercise of the Private Placement Warrants
will be duly and validly issued as fully paid and nonassessable. On the date of issuance of the Private Placement Warrants, the
Shares issuable upon exercise of the Private Placement Warrants shall have been reserved for issuance. Upon issuance in accordance
with, and payment pursuant to, the terms hereof and the Warrant Agreement, the Purchaser will have good title to the Private
Placement Warrants and the Shares issuable upon exercise of such Private Placement Warrants, free and clear of all liens, claims and
encumbrances of any kind, other than (i) transfer restrictions hereunder and under the other agreements contemplated hereby,
(ii) transfer restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances imposed due to
the actions of the Purchaser.

 

     

     

    

 

D. Valid
Issuance. The total number of shares of all classes of capital stock which the Company has authority to issue is 221,000,000 shares
of common stock (which consist of 200,000,000 shares of the Company’s Class A Common Stock, par value $0.0001 per share (the “Class
A Common Stock”) and 20,000,000 shares of the Company’s Class B common stock, par value $0.0001 per share (the “Class
B Common Stock”)) and 1,000,000 shares of the Company’s preferred stock, par value $0.0001, per share (the “Preferred
Stock”). As of the date hereof, the Company has issued and outstanding no shares of Class A Common Stock, 4,312,500 shares of
Class B Common Stock (of which up to 562,500 shares are subject to forfeiture as described in the Registration Statement) and no shares
of Preferred Stock. All of the issued shares of capital stock of the Company have been duly authorized, validly issued, and are fully
paid and non-assessable.

 

E. Governmental
Consents.  No permit, consent, approval or authorization of, or declaration to or filing with, any governmental authority is
required in connection with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company
of any other transactions contemplated hereby.

 

Section 3.  Representations and Warranties
of the Purchaser.  As a material inducement to the Company to enter into this Agreement and issue and sell the Private Placement
Warrants to the Purchaser, the Purchaser hereby represents and warrants to the Company (which representations and warranties shall survive
the applicable Closing Date) that:

 

A. Organization
and Requisite Authority.  The Purchaser possesses all requisite power and authority necessary to carry out the transactions contemplated
by this Agreement.

 

B. Authorization;
No Breach.

 

(i)  This Agreement constitutes
a valid and binding obligation of the Purchaser, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent
conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’ rights and to
general equitable principles (whether considered in a proceeding in equity or law).

 

(ii)  The execution and
delivery by the Purchaser of this Agreement and the fulfillment of and compliance with the terms hereof by the Purchaser does not and
shall not as of the applicable Closing Date conflict with or result in a breach by the Purchaser of the terms, conditions or provisions
of any agreement, instrument, order, judgment or decree to which the Purchaser is subject that would materially impact its ability to
perform its obligations hereunder.

 

C. Investment
Representations.

 

(i)  The Purchaser is
acquiring the Private Placement Warrants and, upon exercise of the Private Placement Warrants, the Shares issuable upon such exercise
(collectively, the “Securities”), for the Purchaser’s own account, for investment purposes only and not with
a view towards, or for resale in connection with, any public sale or distribution thereof.

 

(ii)  The Purchaser is
an “accredited investor” as such term is defined in Rule 501(a)(3) of Regulation D under the Securities Act of 1933,
as amended (the “Securities Act”).

 

(iii)  The Purchaser
understands that the Securities are being offered and will be sold to it in reliance on specific exemptions from the registration requirements
of the United States federal and state securities laws and that the Company is relying upon the truth and accuracy of, and the Purchaser’s
compliance with, the representations and warranties of the Purchaser set forth herein in order to determine the availability of such exemptions
and the eligibility of the Purchaser to acquire such Securities.

 

     

     

    

 

(iv)  The Purchaser did
not enter into this Agreement as a result of any general solicitation or general advertising within the meaning of Rule 502(c) under
the Securities Act.

 

(v)  The Purchaser has
been furnished with all materials relating to the business, finances and operations of the Company and materials relating to the offer
and sale of the Securities which have been requested by the Purchaser.  The Purchaser has been afforded the opportunity to ask questions
of the executive officers and directors of the Company.  The Purchaser understands that its investment in the Securities involves
a high degree of risk and it has sought such accounting, legal and tax advice as it has considered necessary to make an informed investment
decision with respect to the acquisition of the Securities.

 

(vi)  The Purchaser understands
that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation
or endorsement of the Securities or the fairness or suitability of the investment in the Securities by the Purchaser nor have such authorities
passed upon or endorsed the merits of the offering of the Securities.

 

(vii)  The Purchaser
understands that: (a) the Securities have not been and are not being registered under the Securities Act or any state securities
laws, and may not be offered for sale, sold, assigned or transferred unless (1) subsequently registered thereunder or (2) sold
in reliance on an exemption therefrom; and (b) except as specifically set forth in the Registration and Shareholder Rights Agreement,
neither the Company nor any other person is under any obligation to register the Securities under the Securities Act or any state securities
laws or to comply with the terms and conditions of any exemption thereunder.  The Private Placement Warrants will bear a legend and
appropriate “stop transfer” instructions (or an appropriate notation if the warrants are issued in book entry form) relating
to the foregoing. The Purchaser further understands that the U.S. Securities and Exchange Commission (the “SEC”) has
taken the position that promoters or affiliates of a blank check company and their transferees, both before and after an initial business
combination, are deemed to be “underwriters” under the Securities Act when reselling the securities of a blank check company. 
Based on that position, Rule 144 adopted pursuant to the Securities Act would not be available for resale transactions of the Securities
until the one-year anniversary following consummation of an initial business combination despite technical compliance with the requirements
of such Rule.

 

(viii)  The Purchaser
has such knowledge and experience in financial and business matters, knows of the high degree of risk associated with investments in the
securities of companies in the development stage such as the Company, is capable of evaluating the merits and risks of an investment in
the Securities and is able to bear the economic risk of an investment in the Securities in the amount contemplated hereunder for an indefinite
period of time.  The Purchaser has adequate means of providing for its current financial needs and contingencies and will have no
current or anticipated future needs for liquidity which would be jeopardized by the investment in the Securities.  The Purchaser
can afford a complete loss of its investment in the Securities.

 

Section 4.  Conditions of the Purchaser’s
Obligations.  The obligations of the Purchaser to purchase and pay for the Private Placement Warrants are subject to the fulfillment,
on or before the applicable Closing Date, of each of the following conditions:

 

A. Representations
and Warranties.  The representations and warranties of the Company contained in Section 2 shall be true and correct at and
as of the applicable Closing Date as though then made.

 

B. Performance. 
The Company shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required
to be performed or complied with by it on or before the applicable Closing Date.

 

C. No Injunction. 
No litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated
or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority
over the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or the
Warrant Agreement.

 

     

     

    

 

D. Warrant Agreement
and Registration and Shareholder Rights Agreement. The Company shall have entered into the Warrant Agreement and the Registration
and Shareholder Rights Agreement, each on terms satisfactory to the Purchaser.

 

E. Corporate Consents.
The Company shall have obtained the consent of its Board of Directors authorizing the execution, delivery and performance of this Agreement,
the Warrant Agreement and the issuance and sale of the Private Placement Warrants hereunder.

 

Section 5.  Conditions of the Company’s
Obligations.  The obligations of the Company to the Purchaser under this Agreement are subject to the fulfillment, on or before
the applicable Closing Date, of each of the following conditions:

 

A. Representations
and Warranties.  The representations and warranties of the Purchaser contained in Section 3 shall be true and correct at
and as of the applicable Closing Date as though then made.

 

B. Performance. 
The Purchaser shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required
to be performed or complied with by the Purchaser on or before the applicable Closing Date.

 

C. No Injunction. 
No litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated
or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority
over the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or the
Warrant Agreement.

 

D. Warrant
Agreement.  The Company shall have entered into the Warrant Agreement.

 

Section 6.  Termination. 
This Agreement may be terminated at any time after December 31, 2021 upon the election by either the Company or the Purchaser solely as
to itself upon written notice to the other party if the initial closing of the Public Offering does not occur prior to such date.

 

Section 7.  Survival of Representations
and Warranties.  All of the representations and warranties contained herein shall survive the applicable Closing Date.

 

Section 8.  Definitions. 
Terms used but not otherwise defined in this Agreement shall have the meaning assigned to such terms in the Registration Statement.

 

Section 9.  Miscellaneous.

 

A. Successors
and Assigns.  Except as otherwise expressly provided herein, all covenants and agreements contained in this Agreement by or on
behalf of any of the parties hereto shall bind and inure to the benefit of the respective successors of the parties hereto whether so
expressed or not. Notwithstanding the foregoing or anything to the contrary herein, the parties may not assign this Agreement without
the prior written consent of the other party hereto, other than assignments by the Purchaser to affiliates thereof.

 

B. Severability. 
Whenever possible, each provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable
law, but if any provision of this Agreement is held to be prohibited by or invalid under applicable law, such provision shall be ineffective
only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement.

 

C. Counterparts. 
This Agreement may be executed simultaneously in two or more counterparts, none of which need contain the signatures of more than one
party, but all such counterparts taken together shall constitute one and the same agreement. In the event that any signature is delivered
by facsimile transmission or by e-mail delivery of a “.pdf” format data file, such signature shall create a valid and binding
obligation of the party executing (or on behalf of such signature is executed) with the same force and effect as if such facsimile or
 “.pdf” signature page were an original thereof.

 

     

     

    

 

D. Descriptive
Headings; Interpretation.  The descriptive headings of this Agreement are inserted for convenience only and do not constitute
a substantive part of this Agreement.  The use of the word “including” in this Agreement shall be by way of example
rather than by limitation.

 

E. Governing
Law.  This Agreement shall be deemed to be a contract made under the laws of the State of New York and for all purposes shall
be construed in accordance with the internal laws of the State of New York, without regard to the conflicts of laws principles thereof.

 

F. Amendments. 
This Agreement may not be amended, modified or waived as to any particular provision, except by a written instrument executed by all parties
hereto.

 

[Signature page follows]

 

     

     

    

 

IN WITNESS WHEREOF,
the parties hereto have executed this Agreement to be effective as of the date first set forth above.

 

	 	COMPANY:
	 	 
	 	SEAPORT CALIBRE MATERIALS ACQUISITION CORP.
	 	 
	 	By:	/s/ Jim Tumulty
	 	 	Name: 	Jim Tumulty
	 	 	Title:	Chief Executive Officer
	 	 
	 	PURCHASER:
	 	 
	 	CALIBRE SPONSOR SUB,  LLC
	 	 
	 	By:	/s/ Jim Tumulty
	 	 	Name:	Jim Tumulty
	 	 	Title:	Co-Manager of Managing Member

 

[Signature page to Private Placement Warrants
Purchase Agreement]

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