Exhibit 99.3

Designated Filer: Warburg Pincus Private Equity IX, L.P.

Issuer & Ticker Symbol: Laredo Petroleum, Inc. [LPI]

Date of Event Requiring Statement: May 12, 2014

JOINT FILERS’ SIGNATURES

WARBURG PINCUS IX LLC
By:	Warburg Pincus Partners LLC, its Sole Member
By:	Warburg Pincus & Co., its Managing Member
By:	/s/ Robert B. Knauss				Date:	May 12, 2014
	Name:			Robert B. Knauss
	Title:			Partner
WARBURG PINCUS PARTNERS LLC
By:	Warburg Pincus & Co., its Managing Member
By:	/s/ Robert B. Knauss				Date:	May 12, 2014
	Name:			Robert B. Knauss
	Title:			Partner
WARBURG PINCUS LLC
By:	/s/ Robert B. Knauss				Date:	May 12, 2014
	Name:			Robert B. Knauss
	Title:			Managing Director
WARBURG PINCUS & CO.
By:	/s/ Robert B. Knauss				Date:	May 12, 2014
	Name:			Robert B. Knauss
	Title:			Partner
CHARLES R. KAYE
By:	/s/ Robert B. Knauss				Date:	May 12, 2014
	By:		Robert B. Knauss, Attorney-in-Fact*
JOSEPH P. LANDY
By:	/s/ Robert B. Knauss				Date:	May 12, 2014
	By:	Robert B. Knauss, Attorney-in-Fact*

* The Power of Attorney given by each of Mr. Kaye and Mr. Landy was previously filed with the U.S. Securities & 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, Inc. (f/k/a Laredo Petroleum Holdings, Inc.)  and is hereby incorporated by reference.

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