Warburg Pincus X Form 4 MBIA / Joseph P. Landy ownership change

EXHIBIT 99.1

SIGNATURES OF REPORTING PERSONS

After reasonable inquiry and to the best of our knowledge and belief, the undersigned certify that the information set forth in this Form 4 is true, complete and correct.

February 9, 2015

WARBURG PINCUS PRIVATE EQUITY X, L.P.
By: Warburg Pincus X, L.P., its general partner
By: Warburg Pincus X GP L.P., its general partner
By: WPP GP LLC, its general partner
By: Warburg Pincus Partners, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Partner
WARBURG PINCUS X, L.P.
By: Warburg Pincus X GP L.P., its general partner
By: WPP GP LLC, its general partner
By: Warburg Pincus Partners, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Partner
WARBURG PINCUS X GP L.P.
By: WPP GP LLC, its general partner
By: Warburg Pincus Partners, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner

By: Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Partner
WPP GP LLC
By: Warburg Pincus Partners, L.P., its managing member
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Partner
WARBURG PINCUS PARTNERS, L.P.
By: Warburg Pincus Partners GP LLC, its general partner
By: Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Partner
WARBURG PINCUS PARTNERS GP LLC
By: Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Partner
WARBURG PINCUS & CO.
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Partner
WARBURG PINCUS LLC
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Managing Director

CHARLES R. KAYE
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Attorney-in-Fact*
JOSEPH P. LANDY
By:	/s/ Robert B. Knauss
Name: Robert B. Knauss
Title: Attorney-in-Fact*

* Power of Attorney given by each of Mr. Kaye and Mr. Landy was previously filed with the United States Securities and Exchange Commission on November 26, 2013 as an exhibit to a statement on Form 4 filed by Warburg Pincus Private Equity IX, L.P. with respect to Laredo Petroleum Holdings, Inc. (now known as Laredo Petroleum, Inc.) and is hereby incorporated by reference.