| Individual/Entity | Most Recent Trans. | Shares Owned as of Trans. Date | ADORJAN J JOE Director | Purchase 4-Mar-09 | 13,000 4-Mar-09 | ALTRUDO MICHAEL V Officer | Purchase 7-Nov-08 | 18,531 7-Nov-08 | ARCLIGHT CAPITAL HOLDINGS, LLC Beneficial Owner (10% or more) | Ownership Statement 23-Jul-08 | 6,598,662
23-Jul-08 | ARCLIGHT ENERGY PARTNERS FUND I LP Beneficial Owner (10% or more) | Ownership Statement 23-Jul-08 | 3,664,357 23-Jul-08 | ARCLIGHT ENERGY PARTNERS FUND II LP Beneficial Owner (10% or more) | Ownership Statement 23-Jul-08 | 2,934,305 23-Jul-08 | ARCLIGHT PEF GP II, LLC Beneficial Owner (10% or more) | Ownership Statement 23-Jul-08 | 2,934,305
23-Jul-08 | ARCLIGHT PEF GP, LLC Beneficial Owner (10% or more) | Ownership Statement 23-Jul-08 | 3,664,357
23-Jul-08 | BEAN JOSEPH W Officer | Purchase 4-Aug-08 | 9,521 4-Aug-08 | BENNETT ROBERT Officer | Ownership Statement 24-Apr-09 | 89,315 24-Apr-09 | BENNETT ROBERT W Other | Ownership Statement 23-Jul-08 | 25,547 23-Jul-08 | BILLIOT K. SUSAN Officer | Acquisition (Non Open Market) 15-Jul-08 | 1,436 15-Jul-08 | BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UN Other | Sale 29-Jul-09 | 0 29-Jul-09 | BROWN B R Director | Purchase 18-Nov-08 | 13,438 18-Nov-08 | CAISSE DE DEPOT ET PLACEMENT DU QUEBEC Other | Ownership Statement 23-Jul-08 | 1,153,898 23-Jul-08 | CASCADE INVESTMENT LLC Other | Ownership Statement 23-Jul-08 | 1,204,326 23-Jul-08 | CITIGROUP INC Beneficial Owner (10% or more) | Sale 23-Nov-09 | 1,692,291
23-Nov-09 | ELLIOTT TIMOTHY Other | Ownership Statement 23-Jul-08 | 62,211 23-Jul-08 | ENGELHARDT IRL F Officer | Purchase 20-Feb-09 | 383,414
20-Feb-09 | ERHARD JAKE F Director | Ownership Statement 23-Jul-08 | 6,598,662
23-Jul-08 | FRANCISCO DWAYNE BENNETT Other | Ownership Statement 23-Jul-08 | 39,374 23-Jul-08 | HUGHES HOWARD MEDICAL INSTITUTE Other | Ownership Statement 23-Jul-08 | 803,670 23-Jul-08 | JOHNSON MICHAEL P Director | Purchase 21-Aug-08 | 900 21-Aug-08 | LUSHEFSKI JOHN E Director | Purchase 3-Nov-09 | 2,000 3-Nov-09 | MCQUADE TOM Other | Ownership Statement 23-Jul-08 | 16,328 23-Jul-08 | NEMEC JIRI Officer | Disposition (Non Open Market) 23-Jul-08 | 3,784 23-Jul-08 | NORTHWESTERN MUTUAL LIFE INSURANCE CO Other | Ownership Statement 23-Jul-08 | 611,320 23-Jul-08 | REVERS DANIEL R Beneficial Owner (10% or more) | Ownership Statement 23-Jul-08 | 6,598,662
23-Jul-08 | SCHARF MICHAEL M Director | Purchase 4-Sep-09 | 4,000 4-Sep-09 | SCHROEDER MARK N Officer | Purchase 4-Aug-08 | 24,104 4-Aug-08 | SPEARS B SCOTT Other | Ownership Statement 23-Jul-08 | 14,585 23-Jul-08 | ST CLAIR KEITH Other | Ownership Statement 23-Jul-08 | 35,417 23-Jul-08 | TURNBULL DAVID D Other | Ownership Statement 23-Jul-08 | 16,238 23-Jul-08 | TURNER ROBB E Director | Ownership Statement 23-Jul-08 | 6,598,662
23-Jul-08 | VERHEIJ RICHARD H Other | Ownership Statement 23-Jul-08 | 25,573 23-Jul-08 | VIETS ROBERT O Director | Purchase 2-Nov-09 | 5,135 2-Nov-09 | VINING PAUL H Officer | Acquisition (Non Open Market) 23-Jul-08 | 83,567 23-Jul-08 | WHITING RICHARD M Officer | Purchase 30-Oct-08 | 60,800
30-Oct-08 |
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