Exhibit 10.5


 


SPONSOR WARRANTS PURCHASE AGREEMENT


 


THIS SPONSOR WARRANTS
PURCHASE AGREEMENT, dated as of October 9, 2020 (as it may from time to time be amended, this “Agreement”),
is entered into by and between Yellowstone Acquisition Company, a Delaware corporation (the “Company”), and
BOC Yellowstone LLC, a Delaware limited liability company (the “Purchaser”).


 


WHEREAS, the Company
intends to consummate a public offering of the Company’s units (the “Public Offering”), each unit consisting
of one share of the Company’s Class A common stock, par value $0.0001 per share (a “Share”), and
one-half of one warrant, each whole warrant exercisable for one Share at an exercise price of $11.50 per Share, as set forth in
the Company’s registration statement on Form S-1 related to the Public Offering (the “Registration Statement”);
and


 


WHEREAS, the Purchaser
has agreed to purchase from the Company an aggregate of 6,000,000 warrants (or up to 6,600,000 warrants if the over-allotment option
in connection with the Public Offering is exercised in full) (the “Sponsor Warrants”), each Sponsor 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


 


ARTICLE
I


 


AUTHORIZATION,
PURCHASE AND SALE; TERMS OF THE SPONSOR WARRANTS.


 


Section 1.01 Authorization
of the Sponsor Warrants. The Company has duly authorized the issuance and sale of the Sponsor Warrants to the Purchaser.


 


Section 1.02 Purchase
and Sale of the Sponsor Warrants.


 


(a) As
payment in full for the 6,000,000 Sponsor Warrants being purchased under this Agreement, Purchaser shall pay $6,000,000 (the “Purchase
Price”), 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 “Trust Account”) at a financial institution to be chosen by the Company,
maintained by J.P. Morgan Chase Bank, N.A. with Continental Stock Transfer & Trust Company acting as trustee, at least one
(1) business day prior to the date of effectiveness of the Registration Statement.


 


(b) In
the event that the over-allotment option is exercised in full or in part, Purchaser shall purchase up to an additional 600,000
Sponsor Warrants (the “Additional Sponsor Warrants”), in the same proportion as the amount of the over-allotment
option that is exercised, and simultaneously with such purchase of Additional Sponsor Warrants, as payment in full for the Additional
Sponsor Warrants being purchased hereunder, and at least one (1) business day prior to the closing of all or any portion of
the over-allotment option, Purchaser shall pay $1.00 per Additional Sponsor Warrant, up to an aggregate amount of approximately
$600,000, by wire transfer of immediately available funds or by such other method as may be reasonably acceptable to the Company,
to the Trust Account.


 






    	 	 	 



     


    

 


(c) The
closing of the purchase and sale of the Sponsor Warrants shall take place simultaneously with the closing of the Public Offering
(the “Initial Closing Date”). The closing of the purchase and sale of the Additional Sponsor Warrants, if applicable,
shall take place simultaneously with the closing of all or any portion of the 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 each of the Sponsor Warrants and the Additional Sponsor Warrants shall take place at the offices of
Gennari Aronson, LLP, 250 First Avenue, Suite 200, Needham, MA 02494, or such other place as may be agreed upon by the parties
hereto.


 


Section 1.03 Terms
of the Sponsor Warrants.


 


(a) The
Sponsor Warrants shall have their terms set forth in a Warrant Agreement to be entered into by the Company and a warrant agent,
in connection with the Public Offering (a “Warrant Agreement”).


 


(b) At
or prior to the time of the Initial Closing Date, the Company and the Purchaser shall enter into a registration rights agreement
(the “Registration Rights Agreement”) pursuant to which the Company will grant certain registration rights to
the Purchaser relating to the Sponsor Warrants and the Shares underlying the Sponsor Warrants.


 


ARTICLE
II

REPRESENTATIONS AND WARRANTIES OF THE COMPANY


 


As a material inducement
to the Purchaser to enter into this Agreement and purchase the Sponsor Warrants, the Company hereby represents and warrants to
the Purchaser (which representations and warranties shall survive the Closing Dates) that:


 


Section 2.01 Organization
and Corporate Power. The Company is a corporation duly organized, 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.


 


Section 2.02 Authorization;
No Breach.


 


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


 



    	 	2	 



     


    

 


(b) The
execution and delivery by the Company of this Agreement and the Sponsor Warrants, the issuance and sale of the Sponsor Warrants,
the issuance of the Shares upon exercise of the Sponsor 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 Closing Dates (1) conflict with or result in a breach of
the terms, conditions or provisions of, (2) constitute a default under, (3) result in the creation of any lien, security
interest, charge or encumbrance upon the Company’s capital stock or assets under, (4) result in a violation of, or (5) 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 (i) the 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), (ii) any material law, statute, rule
or regulation to which the Company is subject, or (iii) 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, except with respect to clauses (ii)
and (iii) above, where such default, violation or conflict would not reasonably be expected to have a material adverse effect on
the financial condition, operating results or assets of the Company.


 


Section 2.03 Title
to Securities. Upon issuance in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement, the Shares
issuable upon exercise of the Sponsor Warrants will be duly and validly issued, fully paid and nonassessable. Upon issuance in
accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement, the Purchaser will have good title to the
Sponsor Warrants and the Shares issuable upon exercise of such Sponsor 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.


 


Section 2.04 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.


 


ARTICLE
III

REPRESENTATIONS AND WARRANTIES OF THE PURCHASER


 


As a material inducement
to the Company to enter into this Agreement and issue and sell the Sponsor Warrants to the Purchaser, the Purchaser hereby represents
and warrants to the Company (which representations and warranties shall survive the Closing Dates) that:


 


Section 3.01 Organization
and Requisite Authority. The Purchaser possesses all requisite power and authority necessary to carry out the transactions
contemplated by this Agreement.


 






    	 	3	 



     


    

 


Section 3.02 Authorization;
No Breach.


 


(a) 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).


 


(b) 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 Closing Dates 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.


 


Section 3.03 Investment
Representations.


 


(a) The
Purchaser is acquiring the Sponsor Warrants and, upon exercise of the Sponsor 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.


 


(b) The
Purchaser is an “accredited investor” as such term is defined in Rule 501(a)(3) of Regulation D.


 


(c) 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.


 


(d) 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 of 1933, as amended (the “Securities Act”).


 


(e) 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.


 






    	 	4	 



     


    

 


(f) 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.


 


(g) 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 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. In this regard, the Purchaser
understands that the Securities and Exchange Commission 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 despite technical compliance with the certain
requirements of such Rule, and the Securities can be resold only through a registered offering or in reliance upon another exemption
from the registration requirements of the Securities Act.


 


(h) The
Purchaser has such knowledge and experience in financial and business matters, knowledge 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 investments in the Securities.


 


(i) The
Purchaser understands that the Private Placement Warrants shall bear the legend substantially in the form set forth in the Warrant
Agreement.


 


ARTICLE
IV

CONDITIONS OF THE PURCHASER’S OBLIGATIONS


 


The obligations of
the Purchaser to purchase and pay for the Sponsor Warrants are subject to the fulfillment, on or before the Closing Dates, of each
of the following conditions:


 


Section 4.01 Representations
and Warranties. The representations and warranties of the Company contained in Article II shall be true and correct at
and as of the Closing Dates as though then made.


 






    	 	5	 



     


    

 


Section 4.02 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 Closing Dates.


 


Section 4.03 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.


 


Section 4.04 Warrant
Agreement and Registration Rights Agreement. The Company shall have entered into the Warrant Agreement and the Registration
Rights Agreement on terms satisfactory to the Purchaser.


 


ARTICLE
V

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 Closing Dates, of each of the
following conditions:


 


Section 5.01 Representations
and Warranties. The representations and warranties of the Purchaser contained in Article III shall be true and correct
at and as of the Closing Dates as though then made.


 


Section 5.02 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 Closing Dates.


 


Section 5.03 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.


 


Section 5.04 Registration
Rights Agreement. The Purchaser shall have entered into the Registration Rights Agreement.


 


ARTICLE
VI

TERMINATION


 


This Agreement may
be terminated at any time after December 31, 2020 upon the election by either the Company or the Purchaser upon written notice
to the other party, if the closing of the Public Offering does not occur prior to such date.


 




    	 	6	 



     


    

 


ARTICLE
VII

SURVIVAL OF REPRESENTATIONS AND WARRANTIES


 


All of the representations
and warranties contained herein shall survive the Closing Dates.


 


ARTICLE
VIII

DEFINITIONS


 


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


 


ARTICLE
IX

MISCELLANEOUS


 


Section 9.01 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,
other than assignments by the Purchaser to affiliates thereof.


 


Section 9.02 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.


 


Section 9.03 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.


 


Section 9.04 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.


 


Section 9.05 Governing
Law. This Agreement shall be deemed to be a contract made under the laws of the State of Delaware and for all purposes shall
be construed in accordance with the internal laws of the State of Delaware.


 


Section 9.06 Amendments.
This letter 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]




    	 	7	 



     


    

 


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


  


	 	COMPANY:
	 	 
	 	YELLOWSTONE ACQUISITION COMPANY
	 	 	 
	 	By:	 /s/ Joshua P. Weisenburger
	 	Name:	Joshua P. Weisenburger
	 	Title:	Chief Financial Office
	 	 	 
	 	SPONSOR:
	 	 	 
	 	BOC YELLOWSTONE LLC
	 	 	 
	 	By:	Boston Omaha Investments, LLC
	 	 	Managing Member of BOC Yellowstone LLC
	 	 	 
	 	By:	/s/ Joshua P. Weisenburger
	 	Name:	Joshua P. Weisenburger
	 	Title:	Chief Financial Officer


 


[Signature Page to Sponsor Warrant Purchase
Agreement]