Exhibit 4.1

    

    

    NUMBER UNITS

    U-

    

    

    SPECIMEN UNIT CERTIFICATE

    

    

    SEE REVERSE FOR CERTAIN DEFINITIONS

    

    

    CUSIP [●]

    

    

    FOCUS IMPACT ACQUISITION CORP.

    

    

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

    WARRANT TO PURCHASE ONE SHARE OF CLASS A COMMON STOCK

    

    

    THIS CERTIFIES THAT ____________________ is the owner of ___________ Units.

    

    

    Each Unit (“Unit”) consists of one (1) share of Class A common stock, par value $0.0001 per share (“Common Stock”), of Focus Impact Acquisition Corp., a Delaware corporation (the “Company”), and
      one-half (1/2) of one warrant (each whole warrant, a “Warrant”). Each Warrant entitles the holder to purchase one (1) share (subject to adjustment) of Common Stock for $11.50 per share (subject to adjustment). Each 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
      Citigroup Global Markets Inc. elects to allow earlier separate trading, subject to the Company’s filing with the Securities and Exchange Commission of a Current Report on Form 8-K 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 and only whole warrants are exercisable. 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.

    

    

    Upon the consummation of the Business Combination, the Units represented by this certificate will automatically separate into the Class A Common Stock and Warrants comprising such Units.

    

    

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

    

    

    
      
        


    

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

    

    

    Witness the facsimile signatures of its duly authorized officers.

     

    

    	 	 	 
	
            Secretary

          	 	
            Chief Financial Officer

          


    

    

    
      
        


    

    Focus Impact Acquisition Corp.

    

    

    The Company will furnish without charge to each unitholder who so requests, a statement of the powers, designations, preferences and relative, participating, optional or other special rights of each
      class of stock or series thereof of the Company and the qualifications, limitations, or restrictions of such preferences and/or rights.

    

    

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

    

    

    
      	
              TEN CO

            	
              —

            	
              as tenants in common

            	
              UNIF GIFT MIN ACT

            	
              —

            	
              Custodian

            	

            
	 	 	 	

            	 	

            	

            	

            
	 	 	 	 	 	
              
                (Cust)

              

            	
              
                

                

              

            	
              
                (Minor)

              

            
	
              TEN ENT

            	
              —

            	
              as tenants by the entireties

            	 	
              under Uniform Gifts to Minors Act

            
	 	 	 	 	 	 
	
              JT TEN

            	
              —

            	
              as joint tenants with right of survivorship and not as tenants in common

            	 	 	 
	 	 	 	 	 	
              
                (State)

              

            


      

      

    

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

    

    

    
      
        


    

    For value received, ________________ hereby sells, assigns and transfers unto

     

    

    	 
	
            PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE

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

          


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

    

    

    	
            Dated

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

          
	 
	
            Signature(s) Guaranteed:

          
	 
	
            THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM,
              PURSUANT TO S.E.C. RULE 17Ad-15 OR ANY SUCCESSOR RULES).

          


    

    

    In each case, as more fully described in the Company’s final prospectus 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 its initial public offering and liquidates because it does not consummate an initial business
      combination within the period of time set forth in the Company’s amended and restated certificate of incorporation, as the same may be amended from time to time, (ii) the Company redeems the shares of Common Stock sold in its initial public offering
      in connection with a stockholder vote to amend the Company’s amended and restated certificate of incorporation (A) that would modify the substance or timing of the Company’s obligation to provide holders of the Common Stock the right to have their
      shares redeemed in connection with the Company’s initial business combination or to redeem 100% of the Common Stock if the Company does not complete its initial business combination within the time period set forth therein or (B) with respect to any
      other provision relating to the rights of holders of Common Stock, 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.