X0303 4 2011-05-02 0 0000320575 PIONEER DRILLING CO PDC 0001185173 LOCKE STACY 1250 N E LOOP 410 #1000 SAN ANTONIO TX 78209 1 1 0 0 President & CEO Common stock 2011-05-02 4 A 0 37194 0 A 352701 D Employee stock option (right to buy) 3.67 2013-11-20 Common stock 50000 50000 D Employee stock option (right to buy) 14.58 2015-08-18 Common stock 98000 98000 D Employee stock option (right to buy) 14.54 2016-06-05 Common stock 120000 120000 D Employee stock option (right to buy) 14.07 2007-05-14 Common stock 200000 200000 D Employee stock option (Right to buy) 17.07 2018-08-28 Common stock 180000 180000 D Employee stock option (right to buy) 3.84 2019-03-02 Common stock 236000 236000 D Employee stock option (right to buy) 8.86 2020-02-02 Common stock 181800 181800 D Employee stock option (right to buy) 9.01 2021-02-02 Common stock 155919 155919 D Shares represent a restricted stock award; the restrictions lapse in three equal installments on May 2, 2011, April 30, 2012 and April 30, 2013. All options are fully exercisable at 05-04-2011. The options become exercisable in three equal installments on August 28, 2009, 2010 and 2011 The options become exercisable in three equal installments on March 2, 2010, 2011 and 2012. The options become exercisable in three equal installments on February 2, 2011, 2012 and 2013. The option becomes exercisable in three equal installments on February 2, 2012, 2013 and 2014. Wm. Stacy Locke 2011-05-04