Exhibit 4.1


 


	NUMBER	 	UNITS
	U-	 	 


 


SEE REVERSE FOR CERTAIN DEFINITIONS


 


CUSIP _______


 


MDH ACQUISITION CORP. 


UNITS CONSISTING OF ONE SHARE OF CLASS
A COMMON STOCK AND ONE-HALF OF ONE REDEEMABLE WARRANT,

EACH WHOLE WARRANT ENTITLING THE HOLDER TO PURCHASE ONE SHARE OF CLASS A COMMON STOCK


 


THIS CERTIFIES THAT                          is the owner of                       Units.


 


Each Unit (“Unit”)
consists of one share of Class A common stock, par value $0.0001 per share (“Common Stock”), of
MDH Acquisition Corp., a Delaware corporation (the “Company”), and one-half of one redeemable warrant
(the “Warrant”). Each whole Warrant entitles the holder to purchase one share of Common Stock for
$11.50 per share (subject to adjustment). Only whole Warrants are exercisable. Each whole Warrant will become exercisable
on the later of (i) thirty (30) days after the Company’s completion of a merger, capital stock exchange, asset
acquisition, stock purchase, reorganization or other similar business combination with one or more businesses (each a “Business
Combination”), and (ii) twelve (12) months from the closing of the Company’s initial public offering,
and will expire unless exercised before 5:00 p.m., New York City Time, on the date that is five (5) years after the date on
which the Company completes its initial Business Combination, or earlier upon redemption or liquidation (the “Expiration
Date”). The Common Stock and Warrants comprising the Units represented by this certificate are not transferable
separately prior to                       , 2021, unless Stifel, Nicolaus & Company, Incorporated and Oppenheimer & Co. Inc. elect to allow separate
trading earlier, subject to the Company’s filing of a Current Report on Form 8-K with the Securities and Exchange Commission
containing an audited balance sheet reflecting the Company’s receipt of the gross proceeds of the Company’s initial
public offering and issuing a press release announcing when separate trading will begin. No fractional Warrants will be issued
upon separation of the Units. The terms of the Warrants are governed by a Warrant Agreement, dated as of                      , 2021, between the
Company and Continental Stock Transfer & Trust Company, as Warrant Agent, and are subject to the terms and provisions
contained therein, all of which terms and provisions the holder of this certificate consents to by acceptance hereof. Copies
of the Warrant Agreement are on file at the office of the Warrant Agent at 1 State Street, 30th Floor, New York, New
York 10004, and are available to any Warrant holder on written request and without cost.


 


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


 


This certificate shall be governed by and
construed in accordance with the internal laws of the State of Delaware.


 


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


 


	 	 	 
	Authorized Signatory	 	Transfer Agent


 






     


     


    

 


MDH ACQUISITION CORP. 


 


The Company will furnish
without charge to each stockholder who so requests, a statement of the powers, designations, preferences and relative, participating,
optional or other special rights of each class of equity or series thereof of the Company and the qualifications, limitations,
or restrictions of such preferences and/or rights. This certificate and the shares represented thereby are issued and shall be
held subject to all the provisions of the Company’s Second Amended and Restated Certificate of Incorporation and all amendments
thereto and resolutions of the Board of Directors providing for the issue of securities (copies of which may be obtained from the
secretary of the Company), to all of which the holder of this certificate by acceptance hereof assents.


 


The following abbreviations,
when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according
to applicable laws or regulations: 


 


	TEN COM 	—	as tenants in common	 	UNIF GIFT MIN ACT	—	 	Custodian	 
	TEN ENT	—	as tenants by the entireties	 	 	 	(Cust)	 	(Minor)
	JT TEN 	—	as joint tenants with right of survivorship and not as tenants in common	 	 	 	under Uniform Gifts to Minors Act
	 	 	 	 	 	 	 
	 	 	 	 	 	 	(State)


 


Additional abbreviations may also be used
though not in the above list.


 


	For value received,	 	hereby sell, assign and transfer unto




 


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


 


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


 


the Units represented by the within Certificate, and do hereby
irrevocably constitute and appoint                                                    Attorney to transfer the said Shares on the books of the within named Company with full
power of substitution in the premises.


 


Dated 


 


	 	 
	 	Notice: The signature to this assignment must correspond with the name as written upon the face of the certificate in every particular, without alteration or enlargement or any change whatever.


 


	Signature(s) Guaranteed:	 
	 	 
	THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED (OR ANY SUCCESSOR RULE)).	 


 


As more fully
described in, and subject to the terms and conditions described in, the Company’s final prospectus for its initial public
offering dated                       , 2021, the holder(s) of this certificate shall be entitled to receive a pro rata portion of certain funds
held in the trust account established in connection with the Company’s initial public offering only in the event that (i) the
Company redeems the shares of Common Stock sold in the Company’s initial public offering and liquidates because it does not
consummate an initial business combination by the date set forth (the “Last Date”) in the Company’s Amended and
Restated Certificate of Incorporation, as the same may be amended from time to time (the “Charter”), (ii) the
Company redeems the shares of Common Stock sold in its initial public offering properly submitted in connection with a stockholder
vote to amend the Charter to modify the substance or timing of the Company’s obligation to redeem 100% of the Common Stock
if it does not consummate an initial business combination by the Last Date or with respect to any other material provisions relating
to stockholders’ rights or pre-initial business combination activity, or (iii) if the holder(s) seek(s) to
redeem for cash his, her or its respective shares of Common Stock in connection with a tender offer (or proxy solicitation, solely
in the event the Company seeks stockholder approval of the proposed initial business combination) setting forth the details of
a proposed initial business combination. In no other circumstances shall the holder(s) have any right or interest of any kind
in or to the trust account.