X0202 4 2008-05-19 0 0000077877 PETROLEUM DEVELOPMENT CORP PETD 0001195382 WILLIAMS STEVEN R C/O PETROLEUM DEVELOPMENT CORPORATION 120 GENESIS BOULEVARD BRIDGEPORT WV 26330 1 1 0 0 CEO and Chairman Common Stock 2008-05-19 2008-05-22 4 S 0 322 78.11 D 8336 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 161 78.12 D 8175 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 1 78.18 D 8174 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 163 78.19 D 8011 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 180 78.20 D 7831 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 429 78.21 D 7402 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 3 78.24 D 7399 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 539 78.25 D 6860 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 50 78.27 D 6810 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 373 78.28 D 6437 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 9 78.29 D 6428 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 465 78.30 D 5963 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 158 78.31 D 5805 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 322 78.32 D 5483 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 216 78.33 D 5267 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 161 78.36 D 5106 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 54 78.37 D 5052 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 99 78.38 D 4953 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 107 78.39 D 4846 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 161 78.42 D 4685 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 107 78.43 D 4578 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 324 78.44 D 4254 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 250 78.45 D 4004 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 1126 78.46 D 2878 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 214 78.48 D 2664 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 107 78.50 D 2557 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 285 78.52 D 2272 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 107 78.53 D 2165 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 54 78.54 D 2111 I Trust Common Stock 2008-05-19 2008-05-22 4 S 0 214 78.58 D 1897 I Trust Page 2 of 14 /s/ Steven R. Williams 2008-05-21