EX-4.1






 Exhibit 4.1 

NUMBER UNITS 
 U- 

SPECIMEN UNIT CERTIFICATE 
 SEE REVERSE
FOR CERTAIN DEFINITIONS 
 CUSIP No. 65413D204 

NIGHTDRAGON ACQUISITION CORP. 

UNITS CONSISTING OF ONE SHARE OF CLASS A COMMON STOCK AND ONE-FIFTH 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
$0.00001 per share (“Common Stock”), of NightDragon Acquisition Corp., a Delaware corporation (the “Company”), and one-fifth (1/5) of one redeemable warrant
(each whole warrant, a “Warrant”). 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). The terms of the Warrants are
governed by a Warrant Agreement, dated as of             , 2021 (the “Warrant Agreement), between the Company and American Stock Transfer & Trust Company, LLC,
as Warrant Agent, and are subject to the terms and provisions contained therein. 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”), or (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
or with respect to certain Private Placement Warrants or Working Capital Warrants (each term as so defined in the Warrant Agreement) . The Common Stock and Warrants comprising the Units represented by this certificate are not transferable separately
prior to             , 2021, unless Morgan Stanley & Co. LLC elects to allow earlier separate trading, 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 the Company issuing a
press release announcing when separate trading will begin. By acceptance hereof, the holder of this certificate consents to all of the terms and provisions of the Warrant Agreement. Copies of the Warrant Agreement are on file at the office of the
Warrant Agent at 6201 15th Avenue, Brooklyn, New York 11219, 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 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. 
  

					
	  
	 		 	  

	Chief Executive Officer	 		 	Chief Financial Officer
			
		 		 	 American Stock Transfer & Trust Company, LLC

			
		 		 	 Transfer Agent and Registrar















 NIGHTDRAGON 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 COM	 	—	 	as tenants in common	  	UNIF GIFT MIN —	  	Custodian
		 		  	ACT	  	  
	  	  

	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 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).















 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 Class A common stock sold in its initial public offering and liquidates because it does not consummate
an initial business combination by             , 2023 (or by             , 2023, in certain circumstances described in the final
prospectus) (or such later date as the Company’s amended and restated certificate of incorporation may be amended to provide for), (ii) the Company offers to redeem the shares of Class A 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 to (A) modify the substance or timing of the Company’s obligation to redeem 100% of the Class A common stock if it does not
consummate an initial business combination by             , 2023 (or by             , 2023, in certain circumstances described in
the final prospectus) or (B) with respect to any other provision relating to stockholders’ rights or pre-business 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 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. 

  
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