Document:

Specimen Unit Certificate

 Exhibit 4.1 

NUMBER UNITS 
 U- 

SEE REVERSE FOR CERTAIN DEFINITIONS 

CUSIP [•] 
 FORTRESS VALUE
ACQUISITION CORP. IV 
 UNITS CONSISTING OF ONE SHARE OF CLASS A COMMON STOCK AND ONE-EIGHTH
OF ONE 
 REDEEMABLE 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 Fortress Value Acquisition Corp. IV, a Delaware corporation (the
“Company”), and one-eighth (1/8) of one redeemable warrant (each whole warrant, a “Warrant”). Only whole Warrants are exercisable. Each whole 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 will begin separate trading
on                , 2021, unless Deutsche Bank Securities Inc., BofA Securities, Inc. and PJT Partners LP 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 its initial
public offering and issuing a press release announcing when such earlier 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. 
 Upon the consummation of the Business Combination,
the Units represented by this certificate will automatically separate into shares of 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 signature of its duly authorized officers. 
  

			
	  
 Secretary
	  	  
 Chief Financial
Officer

 FORTRESS VALUE ACQUISITION CORP. IV 

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 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) 
  
  

 
  

                Units represented by the within Certificate, and do
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 RULE).

  
 2 

 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 its 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 by the date set forth in the Company’s amended and restated certificate of incorporation, (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) to modify the substance or timing of the Company’s obligation to allow redemption in connection with the Company’s initial Business Combination or
to redeem 100% of the Common Stock if it does not consummate an initial Business Combination by the date set forth in the Company’s amended and restated certificate of incorporation or (B) with respect to any other provision relating to
the rights of holders of the Common stock 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. 

  
 3Specimen Class A Common Stock Certificate

 Exhibit 4.2 

NUMBER 
 C- 

 

			
		 	 SHARES
 SEE REVERSE FOR

CERTAIN DEFINITIONS
 CUSIP [●]

 FORTRESS VALUE ACQUISITION CORP. IV 

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE 

CLASS A COMMON STOCK 
 This Certifies that
                                         
                                         
                                         
                                  

is the owner of
                                         
                                         
                                         
                                        

FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $0.0001 EACH OF THE CLASS A COMMON STOCK OF 

FORTRESS VALUE ACQUISITION CORP. IV 

(THE “CORPORATION”) 

transferable on the books of the Corporation in person or by duly authorized attorney upon surrender of this certificate properly endorsed. 

The Corporation will be forced to redeem all of its shares of Class A common stock if it is unable to complete a business combination by the date set
forth in the Corporation’s amended and restated certificate of incorporation, all as more fully described in the Corporation’s final prospectus dated
                , 2021. 
 This certificate is not valid unless
countersigned by the Transfer Agent and registered by the Registrar. 
 Witness the seal of the Corporation and the facsimile signatures of its duly
authorized officers. 
  

					
	 Secretary

                          
                                      
	  	 [Corporate Seal]

Delaware
	  	 President

                          
                                         
 

 FORTRESS VALUE ACQUISITION CORP. IV 

The Corporation will furnish without charge to each stockholder who so requests the powers, designations, preferences and relative, participating, optional or
other special rights of each class of stock or series thereof of the Corporation 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 Corporation’s amended and restated certificate of incorporation and all amendments thereto and resolutions of
the Corporation’s Board of Directors providing for the issue of securities (copies of which may be obtained from the secretary of the Corporation), 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
sells, assigns and transfers unto 
  
  

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

 
  

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

 
  

 
  

 
  

Shares of the capital stock represented by the within Certificate, and do hereby irrevocably constitutes and appoints 

 
  

Attorney to transfer the said stock on the books of the within named Corporation with full power of substitution in the premises. 

Dated: 
  

 
  

 
 NOTICE: THE SIGNATURE(S) 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: 
 By 

 
  

 
  

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 RULE). 
 In
each case, as more fully described in the Corporation’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 its initial public offering only in the event that (i) the Corporation redeems the shares of
Class A common stock sold in its initial public offering and liquidates because it does not consummate an initial business combination by the date set forth in the Corporation’s amended and restated certificate of incorporation,
(ii) the Corporation redeems the shares of Class A common stock sold in its initial public offering in connection with a stockholder vote to amend the Corporation’s amended and restated certificate of incorporation (A) to modify
the substance or timing of the Corporation’s obligation to allow redemption in connection with its initial business combination or to redeem 100% of the Class A common stock if it does not consummate an initial business combination by the
date set forth in the Corporation’s amended and restated certificate of incorporation or (B) with respect to any other provision relating to the rights of holders of the Class A common stock or
pre-initial business 

  
 2 

 
combination activity, or (iii) if the holder(s) seek(s) to redeem for cash his, her or its respective shares of Class A common stock in connection with a tender offer (or proxy
solicitation, solely in the event the Corporation 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. 

  
 3

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