Document:

Exihibit 4.1

 

	
 
    	
 
    	
NUMBER UNITS U-
    
	
SEE REVERSE FOR CERTAIN DEFINITIONS
    	
 
    	
CUSIP G0726L 109
    

 

AVISTA HEALTHCARE PUBLIC ACQUISITION CORP.

 

UNITS CONSISTING OF ONE CLASS A ORDINARY SHARE AND ONE
 WARRANT TO PURCHASE ONE-HALF OF ONE CLASS A ORDINARY SHARE

 

	
THIS CERTIFIES THAT
    	
 
    	
is the owner of
    	
 
    	
Units.
    

 

Each Unit (“Unit”) consists of one (1) Class A ordinary share, par value $0.0001 per share (“Ordinary Shares”), of Avista Healthcare Public Acquisition Corp., a Cayman Islands exempted company (the “Company”), and one (1) warrant (the “Warrant”).  Each Warrant entitles the holder to purchase one-half (1/2) of one Ordinary Share (subject to adjustment) for $5.75 per one-half share (or $11.50 per whole 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, share 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 Ordinary Shares and Warrants comprising the Units represented by this certificate are not transferable separately prior to             , 2016, unless Credit Suisse Securities (USA) 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 its initial public offering and issuing a press release announcing when separate trading will begin.  The terms of the Warrants are governed by a Warrant Agreement, dated as of               , 2016, 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 17 Battery Place, 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 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.

	
 
    	
 
    	
 
    
	
Director
    	
 
    	
Vice President
    

 

 

Avista Healthcare Public 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 shares 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 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:
    	
 
    	
 
    

 

2

 

	
 
    	
 
    	
 
    
	
 
    	
 
    	
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   ACT OF 1933, AS AMENDED).
    	
 
    	
 
    

 

In each case, as more fully described in the Company’s final prospectus dated            , 2016, 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 Class A ordinary shares sold in its initial public offering and liquidates because it does not consummate an initial business combination by             , 2018, (ii) the Company redeems the Class A ordinary shares sold in its initial public offering in connection with a shareholder vote to amend the Company’s amended and restated memorandum and articles of association to modify the substance and timing of the Company’s obligation to redeem 100% of the Class A ordinary shares if it does not consummate and initial business combination by              , 2018, or (iii) if the holder(s) seek(s) to redeem for cash his, her or its respective Class A ordinary shares in connection with a tender offer (or proxy solicitation, solely in the event the Company seeks shareholder 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.

 

3Exihibit 4.2

 

	
NUMBER
    	
 
    	
NUMBER C SHARES SEE REVERSE FOR CERTAIN DEFINITIONS CUSIP   G0726L 125
    

 

AVISTA HEALTHCARE PUBLIC ACQUISITION CORP.
 INCORPORATED UNDER THE LAWS OF THE CAYMAN ISLANDS
 CLASS A ORDINARY SHARES

 

	
This Certifies that
    	
 
    
	
 
    	
 
    
	
is the owner of
    	
 
    

 

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

 

AVISTA HEALTHCARE PUBLIC ACQUISITION CORP.
 (THE “COMPANY”)

 

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

 

The Company will be forced to redeem all of its Class A ordinary shares if it is unable to complete a business combination by            , 2018 all as more fully described in the Company’s final prospectus dated          , 2016.

 

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

 

Witness the seal of the Company and the facsimile signatures of its duly authorized officers.

 

	
Director
    	
 
    	
[Corporate Seal]
   Cayman Islands
    	
 
    	
Vice President
    

 

 

AVISTA HEALTHCARE PUBLIC ACQUISITION CORP.

 

The Company will furnish without charge to each shareholder who so requests the powers, designations, preferences and relative, participating, optional or other special rights of each class of shares 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 amended and restated memorandum and articles of association 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 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 represented by the within   Certificate, and does 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(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 UNDER THE SECURITIES ACT OF 1933, AS AMENDED).

 

In each case, as more fully described in the Company’s final prospectus dated           , 2016, 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 Class A ordinary shares sold in its initial public offering and liquidates because it does not consummate an initial business combination by            , 2018, (ii) the Corporation redeems the Class A ordinary shares sold in its initial public offering in connection with a shareholder vote to amend the Company’s amended and restated memorandum and articles of association to modify the substance and timing of the Company’s obligation to redeem 100% of the Class A ordinary shares if it does not consummate and initial business combination by            , 2018, or (iii) if the holder(s) seek(s) to redeem for cash his, her or its respective Class A ordinary shares in connection with a tender offer (or proxy solicitation, solely in the event the Company seeks shareholder 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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