X0204 3 2011-12-14 0 0001528129 Laredo Petroleum Holdings, Inc. LPI 0001227704 WOLF DONALD D 15 W. SIXTH STREET, SUITE 1800 TULSA OK 74119 1 0 0 0 Common Stock 0 D The reporting person does not hold securities of the Issuer. The reporting person currently holds units in Laredo Petroleum, LLC, the Issuer's predecessor. In connection with a corporate reorganization, which will involve Laredo Petroleum, LLC merging with the Issuer, with the Issuer being the surviving entity, and will be completed on or prior to the closing of the Issuer's initial public offering described in the prospectus dated November 28, 2011, the reporting person will receive common stock of the Issuer in exchange for his vested and unvested units in Laredo Petroleum, LLC. Exhibit 24 - Power of Attorney /s/ Kenneth E. Dornblaser, as attorney-in-fact for Donald D. Wolf 2011-12-14