Document:

EXHIBIT 4.1

 

NUMBER              UNITS

U-                       

 

SEE REVERSE FOR

CERTAIN DEFINITIONS

 

INFORMATION SERVICES
GROUP, INC.

 

CUSIP

 

UNITS CONSISTING OF ONE
SHARE OF COMMON STOCK AND

ONE WARRANT TO PURCHASE ONE SHARE OF COMMON STOCK

 

THIS CERTIFIES THAT                                                                                         
is the owner of                                      
Units.

 

Each Unit (“Unit”) consists of one (1) share of common
stock, par value $0.001 per share (“Common Stock”), of Information Services
Group, Inc., a Delaware corporation (the “Corporation”), and one warrant (the “Warrant”).
The Warrant entitles the holder to purchase one (1) share of Common Stock for
[$6.00/$7.50] per share (subject to adjustment). The Warrant will become
exercisable on the later of (i) the Corporation’s completion of an acquisition
of one or more domestic or international or operating businesses through a
merger, capital stock exchange, asset acquisition or other similar business
combination and (ii)                         
[one year after the effective date of the registration statement relating to
the initial public offering of the Units], and will expire unless exercised
before 5:00 p.m., New York City time, on                         ,
2011 [four years after the effective date of the registration statement
relating to the initial public offering of the Units], or earlier upon
redemption (the “Expiration Date”). The Common Stock and Warrants comprising
the Units represented by this certificate are not transferable separately prior
to five business days following the earlier to occur of (1) the expiration or
termination of the underwriter’s over-allotment option in connection with the
Corporation’s initial public offering or (2) the exercise in full of such
underwriter’s over-allotment option, subject in either case to the Corporation
filing a Current Report on Form 8-K with the Securities and Exchange Commission
containing an audited balance sheet reflecting the Corporation’s receipt of the
gross proceeds of its initial public offering and issuing a press release
announcing when such separate trading will begin. The terms of the Warrant are
governed by a Warrant Agreement, dated as of                         ,
2007, between the Corporation 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 Corporation.

 

1

 

Witness the facsimile seal of the Corporation and the
facsimile signature of its duly authorized officers.

 

INFORMATION SERVICES
GROUP, INC.

CORPORATE

DELAWARE

SEAL

2006

 

	
  By:

  	
   

  	
   

  	
   

  
	
   

  	
  Chairman of the Board

  	
   

  	
  Secretary

  
	
   

  	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  	
   

  
	
  By:

  	
   

  	
   

  	
   

  	
   

  
	
   

  	
  Transfer Agent

  	
   

  	
   

  	
   

  

 

 

INFORMATION SERVICES
GROUP, INC.

 

The Corporation will furnish without charge to each
stockholder 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 Corporation 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 

  	
   

  	
   

  	
  under Uniform Gifts to

  	
   

  
	
   

  	
   

  	
  not as tenants in common

  	
   

  	
   

  	
  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
  CORPORATION 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.

  
					

 

3

 

	
  Signature(s) Guaranteed:

  	
   

  
	
   

  	
   

  
	
   

  	
   

  
	
  THE SIGNATURE(S) SHOULD 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).EXHIBIT
4.2

 

	
  NUMBER

  	
   

  	
  SHARES          

  

 

INFORMATION
SERVICES GROUP, INC.

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

COMMON STOCK

 

SEE
REVERSE FOR

CERTAIN DEFINITIONS

 

	
  THIS CERTIFIES THAT

  	
   

  	
  CUSIP

  

 

IS THE OWNER OF

 

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

 

INFORMATION
SERVICES GROUP, INC.

 

TRANSFERABLE ON THE BOOKS OF
THE CORPORATION IN PERSON OR BY DULY AUTHORIZED ATTORNEY UPON SURRENDER OF THIS
CERTIFICATE PROPERLY ENDORSED.  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.

 

DATED:

 

INFORMATION
SERVICES GROUP, INC.

CORPORATE

DELAWARE

SEAL

2006

 

	
  By:

  	
   

  	
   

  	
   

  
	
   

  	
  Chairman of the Board

  	
   

  	
  Secretary

  
	
   

  	
   

  	
   

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  	
   

  
	
  By:

  	
   

  	
   

  	
   

  	
   

  
	
   

  	
  Transfer Agent

  	
   

  	
   

  	
   

  

 

1

 

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.

 

INFORMATION
SERVICES GROUP, INC.

 

The Company 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 shares of Preferred Stock (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.

 

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)

  
	
   

  	
   

  
	
   

  	
   

  
	
                                                                                                                                                                                   
  SHARES OF THE CAPITAL STOCK REPRESENTED BY THE WITHIN CERTIFICATE, AND DO
  HEREBY IRREVOCABLY CONSTITUTE AND APPOINT                                                            
  ATTORNEY TO TRANSFER THE SAID STOCK ON THE BOOKS OF THE WITHIN NAMED
  CORPORATION 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) SHOULD 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).

  	
   

  

 

The holder of this
certificate shall be entitled to receive funds from  the trust fund only in the event of the
Corporation’s liquidation upon failure to consummate a business combination or
if the holder seeks to convert his respective shares into cash upon a business
combination which he voted against and which is actually completed by the
Corporation.  In no other circumstances
shall the holder have any right or interest of any kind in or to the trust
fund.

 

3

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