[Founders’
      Unit Legend

     

    THE
      SECURITIES REPRESENTED BY THIS UNIT CERTIFICATE (INCLUDING THE UNDERLYING COMMON
      STOCK, WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THE UNDERLYING
      WARRANT ) HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED
      (THE “ACT”), OR THE SECURITIES LAWS OF ANY STATE OR OTHER JURISDICTION, AND MAY
      NOT BE TRANSFERRED IN VIOLATION OF SUCH ACT AND LAWS, OR AN EXEMPTION FROM
      REGISTRATION THEREFROM.

     

    THE
      SECURITIES REPRESENTED BY THIS UNIT CERTIFICATE (INCLUDING THE UNDERLYING COMMON
      STOCK, WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THE UNDERLYING
      WARRANT ) ARE SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AND OTHER
      AGREEMENTS SET FORTH IN (I) THE LETTER AGREEMENT DATED AS OF
                        ,
      2008, BY AND BETWEEN THE HOLDER AND CREDIT SUISSE SECURITIES (USA) LLC AND
      (II)
      THE WARRANT AGREEMENT DATED AS OF DECEMBER 14, 2007, BY AND BETWEEN THE COMPANY
      AND THE WARRANT AGENT. COPIES OF SUCH AGREEMENTS MAY BE OBTAINED BY THE HOLDER
      HEREOF AT THE COMPANY’S PRINCIPAL PLACE OF BUSINESS WITHOUT
      CHARGE.]

    

      
        	 	 	 
	
                NUMBER

                U-
                              

              	
                 

              	
                             UNITS

              


      

    

     

    SEE
      REVERSE FOR

    CERTAIN
      DEFINITIONS

     

    GREENSTREET
      ACQUISITION CORP. 

     

    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 $.001 per
      share (the “Common Stock”), of Greenstreet Acquisition Corp., 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 per
      share (subject to adjustment pursuant to the Warrant Agreement, as described
      below). The Warrant will become exercisable on the later of (i) the
      completion of a Business Combination (as such term is defined in the Amended
      and
      Restated Articles of Incorporation of the Corporation), and
      (ii)                     ,
      2009 [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
                    ,
      2012 [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 the
      Warrant comprising the Units represented by this certificate are not
      transferable separately prior to
                    ,
      2008 [the
      fifth day after the expiration date of the underwriters’ over-allotment
      option],
      subject
      to earlier separation in the event that the underwriters’ over-allotment option
      is exercised in full prior to such date. The terms of the Warrants are governed
      by a Warrant Agreement, dated as of December 14, 2007, between the Corporation
      and American Stock Transfer & Trust Company (the “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.
      This Unit Certificate shall be governed in accordance with the laws of the
      State
      of Delaware. Copies of the Warrant Agreement are on file at the office of the
      Warrant Agent at 59 Maiden Lane, New York, New York 10038 and are available
      to
      any Warrant holder on written request and without cost.

     

    1

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    
      

      

    

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

     

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

     

    GREENSTREET
      ACQUISITION CORP. 
      
        

      

    

    CORPORATE

    DELAWARE

    SEAL

    2007

     

    
      
        	By:                                                                                                                           	
                                                                                               
                  

              
	
                President

              	
                Secretary

              
	 	 
	Countersigned
                By:                                                                                                 	 
	
                Transfer
                  Agent

              	 


      

    

     

    
      
        
        

      

      
        
        

        
          

        

      

      
        
        

      

    

     

    
      

      

    

    GREENSTREET
      ACQUISITION CORP. 

     

    The
      Corporation will furnish without charge to each unit holder 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
                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 DOES 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.

            	
               

            


    

     

    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 SECURITIES AND EXCHANGE COMMISSION RULE 17Ad-15).