Portola Pharmaceuticals Inc (PTLA): This Hedge Fund is Loading Up Following Stock’s Weakness

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Page 11 of 12 – SEC Filing
 
Exhibit A
 
Agreement
 
The undersigned agree that this Schedule 13G, and all amendments thereto, relating to the Common Stock of Portola Pharmaceuticals, Inc. shall be filed on behalf of the undersigned.
 
 
DEERFIELD MGMT, L.P.
 
By: J.E. Flynn Capital, LLC, General Partner
 
By: /s/ Jonathan Isler
       Jonathan Isler, Attorney-In-Fact
 
 
DEERFIELD MANAGEMENT COMPANY, L.P.
 
By:  Flynn Management LLC, General Partner
 
By: /s/ Jonathan Isler
       Jonathan Isler, Attorney-In-Fact
 
 
DEERFIELD PARTNERS, L.P.
 
By: Deerfield Mgmt, L.P., General Partner
By: J.E. Flynn Capital, LLC, General Partner
 
By: /s/ Jonathan Isler
       Jonathan Isler, Attorney-In-Fact
 
 
DEERFIELD INTERNATIONAL MASTER FUND, L.P.
 
By: Deerfield Mgmt, L.P., General Partner
By: J.E. Flynn Capital, LLC, General Partner
 
By: /s/ Jonathan Isler
       Jonathan Isler, Attorney-In-Fact
 
 
DEERFIELD SPECIAL SITUATIONS FUND, L.P.
 
By: Deerfield Mgmt, L.P., General Partner
By: J.E. Flynn Capital, LLC, General Partner
 
By: /s/ Jonathan Isler
       Jonathan Isler, Attorney-In-Fact
 
JAMES E. FLYNN
 
/s/ Jonathan Isler
Jonathan Isler, Attorney-In-Fact
 

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