As Of                Filer                Filing    For·On·As Docs:Size              Issuer               Agent

 7/05/13  Blue Harbour Group, L.P.          SC 13D                 2:121K Progressive Waste Solutions Ltd.  Summit Fin’l Printing
          Blue Harbour Holdings, LLC
          Clifton S. Robbins

Document/Exhibit                   Description                      Pages   Size 

 1: SC 13D      Blue Harbour Group, Lp SC 13D 6-27-2013             HTML     52K 
                          (Progressive)                                          
 2: EX-1        Underwriting Agreement                              HTML     10K 

Exhibit 1

AGREEMENT AS TO JOINT FILING OF SCHEDULE 13D

Dated July 5, 2013

The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements.  The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that it knows or has reason to believe that such information is inaccurate.

This Agreement may be executed in counterparts and each of such counterparts taken together shall constitute one and the same instrument.