Exhibit 4.1


 


SPECIMEN UNIT CERTIFICATE


 


NUMBER UNITS U-


 


	
        SEE REVERSE FOR

        CERTAIN

        DEFINITIONS
	 	Altimar Acquisition Corporation	 	 


 


CUSIP [ ]


 


UNITS CONSISTING OF ONE CLASS A
ORDINARY SHARE AND ONE-THIRD OF ONE REDEEMABLE


 


WARRANT TO PURCHASE 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 Altimar Acquisition
Corporation, a Cayman Islands exempted company (the “Company”), and one-third (1/3) of one redeemable warrant (each
whole warrant, a “Warrant”). Each Warrant entitles the holder to purchase one (1) Ordinary Share 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, share exchange, asset acquisition, share 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 Ordinary Shares and Warrants comprising the Units represented by this certificate
are not transferable separately prior to [ ], 2020, unless Goldman Sachs & Co. LLC 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 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 exerciseable. The terms of the Warrants are governed by a Warrant Agreement, dated as of [ ], 2020,
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 Ordinary
Shares 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.


 


	By	 	 	 	 
	 	 	Chief Executive Officer	 	Chief Financial Officer


 






     


     


    

 


Altimar Acquisition Corporation


 


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	 
	 	 	 	 	 	 	 	 
	 	 	 	 	 	(Cust)	 	(Minor)
	 	 	 	 	 	 
	TEN

 ENT	—	as tenants by the entireties	 	 	under Uniform Gifts to

 Minors Act
	 	 	 	 	 	 
	 	 	 	 	 	(State)
	 	 	 	 	 	 	 	 
	JT
    TEN	—	as joint tenants with right of survivorship

 and not as tenants in common	 	 	 	 	 


 


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 RULES).	 	 


 






     


     


    

 


In each case, as more
fully described in the Company’s final prospectus dated [ ], 2020, 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 Ordinary Shares 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 memorandum and articles of association, as the same may be amended from time to time, (ii) the Company
redeems the 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 (A) that would modify the substance or timing of the Company’s
obligation to provide holders of the Ordinary Shares the right to have their shares redeemed in connection with the Company’s
initial business combination or to redeem 100% of the Ordinary Shares 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 the
Ordinary Shares, or (iii) if the holder(s) seek(s) to redeem for cash his, her or its respective 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.