Exhibit 99.3

Designated Filer:	Warburg Pincus Private Equity IX, L.P.
Issuer & Ticker Symbol:	Vringo, Inc. (VRNG)
Date of Event Requiring Statement:	June 21, 2010

Joint Filers’ Signatures

WARBURG PINCUS & CO.

By:	/s/ Scott A. Arenare		Date: June 21, 2010
	Name: Scott A. Arenare
	Title: Partner
WARBURG PINCUS IX, LLC
By: Warburg Pincus Partners, LLC, its Sole Member,
By: Warburg Pincus & Co., its Managing Member
By:	/s/ Scott A. Arenare		Date: June 21, 2010
	Name: Scott A. Arenare
	Title: Partner
WARBURG PINCUS PARTNERS, LLC
By: Warburg Pincus & Co., its Managing Member
By:	/s/ Scott A. Arenare		Date: June 21, 2010
	Name: Scott A. Arenare
	Title: Partner
WARBURG PINCUS LLC
By:	/s/ Scott A. Arenare		Date: June 21, 2010
	Name: Scott A. Arenare
	Title: Managing Director
By:	/s/ Scott A. Arenare		Date: June 21, 2010
	Name: Charles R. Kaye
	By: Scott A. Arenare, Attorney-in-Fact*
By:	/s/ Scott A. Arenare		Date: June 21, 2010
	Name: Joseph P. Landy
	By: Scott A. Arenare, Attorney-in-Fact**

* Power of Attorney given by Mr. Kaye was previously filed with the SEC on March 2, 2006, as an exhibit to a Schedule 13D filed by Building Products, LLC with respect to Builders FirstSource, Inc.

** Power of Attorney given by Mr. Landy was previously filed with the SEC on March 2, 2006, as an exhibit to a Schedule 13D filed by Building Products, LLC with respect to Builders FirstSource, Inc.