Document:

EX-4.1

 Exhibit 4.1 

NUMBER UNITS 
 U-[•] 

SEE REVERSE FOR CERTAIN 
 DEFINITIONS 

CUSIP [•] 
 GIGCAPITAL,
INC. 
 UNITS CONSISTING OF ONE SHARE OF COMMON STOCK, ONE RIGHT AND ONE-HALF OF ONE 

WARRANT 
 TO PURCHASE ONE
SHARE OF COMMON STOCK 
 THIS CERTIFIES
THAT                                         is
the owner of                             Units. 

Each Unit (“Unit”) consists of one share of the common stock, par value $0.0001 per share (“Common Stock”), of
GigCapital, Inc., a Delaware corporation (the “Company”), one right to receive one-tenth (1/10) of one share of Common Stock (the “Right”), and one-half (1/2) of one warrant
(the “Warrant”). Each whole Warrant entitles the holder to purchase one share 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”), 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 (the “Expiration Date”). Each Right entitles the holder thereof to receive one-tenth (1/10) of one
share of Common Stock upon the consummation of the Company’s initial Business Combination. If the Company is unable to complete an initial Business Combination within 18 months of the closing of the Company’s initial public offering of the
Units (the “Offering”) (or 21 months from the closing date of the Offering if the Company has executed a letter of intent, agreement in principle or definitive agreement for an initial Business Combination within 18 months
from the closing date of the Offering but has not completed the initial Business Combination within such 18 month period) the Rights will expire worthless. The Company will not issue fractional shares upon exchange of the Rights. The Common Stock,
Rights and Warrants comprising the Units represented by this certificate are not transferable separately prior to         , 2018, unless Cowen and Company LLC elects 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 Offering and issuing a press release
announcing when separate trading will begin. The terms of the Rights are governed by a Rights Agreement, dated as of December     , 2017, between the Company and Continental Stock Transfer & Trust Company
(“Continental”), as Rights 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. The terms of the Warrants are
governed by a Warrant Agreement, dated as of December     , 2017, between the Company and Continental, 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 Rights Agreement and Warrant Agreement are on file at the office of Continental at 1 State Street, 30th Floor, New
York, New York 10004, and are available to any Rights or Warrant holder on written request and without cost. 
 This certificate is not
valid unless countersigned by the Transfer Agent and Registrar of the Company. 
 Witness the facsimile signature of its duly authorized
officers. 
  

					
	  
 Secretary
	 		  	  
 President

 GigCapital, Inc. 

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)
		 		 		  		  	Under Uniform Gifts to Minors
			
	 JT TEN — as joint tenants with right of survivorship and not as
tenants in common
	  		  	 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)).
	  	

 In each case, as more fully described in the Company’s final prospectus relating to the Offering ,
dated         , 2017, 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 Offering only in the event
that (i) the Company redeems the shares of Common Stock sold in the Offering and liquidates because it does not consummate an initial Business Combination by
                , 2019, (ii) the Corporation redeems the shares of Common Stock sold in the Offering in connection with a stockholder vote to approve an amendment
to any provision of the Corporation’s Amended and Restated Certificate of Incorporation relating to its pre-initial business combination activity or the related stockholders’ rights, 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.EX-4.2

 Exhibit 4.2 

  NUMBER 

              C 

 

			
		  	 SEE REVERSE FOR

CERTAIN DEFINITIONS        

CUSIP [●]

 GIGCAPITAL, INC. 

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE 

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 COMMON STOCK OF 

GIGCAPITAL, INC. 
 (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 common stock if it is unable to complete a business combination by
                      , 2019 or as more fully described in the Corporation’s final prospectus dated
            , 2017. 
 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. 

 

					
	 	 	    [Corporate Seal]    	 	 
	Secretary	 	Delaware	 	President

 GIGCAPITAL, INC. 

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 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 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	 	Under Uniform Gifts to Minors
		 	     of survivorship and not as tenants in common	 	    
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 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             , 2017, 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 common stock sold in its initial public offering and liquidates because it does not consummate an initial
business combination by                 , 2019, (ii) the Corporation redeems the shares of common stock sold in its initial public offering in connection
with a stockholder vote to approve an amendment to any provision of the Corporation’s amended and restated certificate of incorporation 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 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.

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