X0304 4 2011-08-21 0 0000318996 KEY ENERGY SERVICES INC KEG 0001446813 DOUGLAS DENNIS C 1301 MCKINNEY STREET SUITE 1800 HOUSTON TX 77010 0 1 0 0 SVP, Fluid Managment Svcs Common Stock 2011-08-21 4 F 0 1072 12.745 D 80438 D Payment of tax liability by delivery of stock incident to the vesting on August 21, 2011 of 4,051 shares of restricted stock. Vesting price is calculated based on the average closing price of common stock on August 19, 2011 and the opening price on August 22, 2011, pursuant to the Key Energy Services, Inc. 2007 Equity and Cash Incentive Plan (the "2007 Plan"). Includes 53,852 unvested shares of restricted stock granted under the 2007 Plan and the Key Energy Services, Inc. 2009 Equity and Cash Incentive Plan. By Joshua K. Hancock, Attorney-in-fact for Dennis C. Douglas 2011-08-23