EX-99 2 e614131_ex99.htm OWNERSHIP DOCUMENT Unassociated Document
 
Joint Filer Information

Names:
Deerfield Mgmt, L.P.,  Deerfield Management Company, L.P.,
Deerfield Partners, L.P., Deerfield International Master Fund, L.P.
Deerfield Mgmt III, L.P., Deerfield Private Design Fund III, L.P.
   
Address:
780 Third Avenue, 37th Floor
New York, NY  10017
   
Designated Filer:
James E. Flynn
   
Issuer and Ticker Symbol:
REGENXBIO Inc. [RGNX]
   
Date of Earliest Transaction
Required To be Reported:
 
September 22, 2015

The undersigned, Deerfield Mgmt, L.P., Deerfield Mgmt III, L.P., Deerfield Management Company, L.P., Deerfield Partners, L.P., Deerfield Private Design Fund III, L.P. and Deerfield International Master Fund, L.P. are jointly filing the attached Statement of Changes in Beneficial Ownership on Form 4 with James E. Flynn with respect to the beneficial ownership of securities of REGENXBIO Inc.

Signatures:

DEERFIELD MGMT, L.P.
By:  J.E. Flynn Capital, 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 MANAGEMENT COMPANY, L.P.
By:  Flynn Management 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 MGMT III, L.P.
 
By:  J.E. Flynn Capital III, LLC, General Partner
 
By: /s/ Jonathan Isler
        Jonathan Isler, Attorney-In-Fact
 
DEERFIELD PRIVATE DESIGN FUND III, L.P.
 
By:  Deerfield Mgmt III, L.P., General Partner
 
By:  J.E. Flynn Capital III, LLC, General Partner
 
By: /s/ Jonathan Isler
        Jonathan Isler, Attorney-In-Fact