| Date | Insider | Shares | Type | Transaction | Value* |
| 13-Nov-09 | MILLER DAVID A Officer | 7,800 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 13-Nov-09 | KEOHANE SEAN D Officer | 5,900 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 13-Nov-09 | PREVOST PATRICK M. Officer | 35,200 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 13-Nov-09 | CORDEIRO EDUARDO E Officer | 7,800 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 13-Nov-09 | BERUBE BRIAN A Officer | 5,900 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 14-Sep-09 | MILLER DAVID A Officer | N/A | Direct | Statement of Ownership | N/A |
| 14-Sep-09 | SCHMITZ RONALDO H Director | 5,000 | Direct | Purchase at $20.75 per share. | $103,750 |
| 14-Aug-09 | KEOHANE SEAN D Officer | 13,209 | Direct | Sale at $19.79 per share. | $261,406 |
| 4-Jun-09 | BERUBE BRIAN A Officer | 18,492 | Direct | Sale at $16.41 per share. | $303,453 |
| 28-May-09 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 3,800,000 | Indirect | Sale at $15.60 per share. | $59,280,000 |
| 18-May-09 | BRADY WILLIAM J Officer | 33,755 | Direct | Sale at $16.93 per share. | $571,472 |
| 12-May-09 | KEOHANE SEAN D Officer | 1,791 | Direct | Disposition (Non Open Market) at $16.94 per share. | $30,339 |
| 12-May-09 | KELLY JAMES PATRICK Officer | 928 | Direct | Disposition (Non Open Market) at $16.94 per share. | $15,720 |
| 12-May-09 | BRADY WILLIAM J Officer | 4,179 | Direct | Disposition (Non Open Market) at $16.94 per share. | $70,792 |
| 12-May-09 | CORDEIRO EDUARDO E Officer | 4,179 | Direct | Disposition (Non Open Market) at $16.94 per share. | $70,792 |
| 12-May-09 | BERUBE BRIAN A Officer | 2,508 | Direct | Disposition (Non Open Market) at $16.94 per share. | $42,485 |
| 12-Mar-09 | SAN FRANCISCO PARTNERS LP Beneficial Owner (10% or more) | 89,500 | Indirect | Sale at $8.97 per share. | $802,815 |
| 6-Mar-09 | PREVOST PATRICK M. Officer | 10,000 | Direct | Purchase at $8.57 per share. | $85,700 |
| 13-Feb-09 | MASON JONATHAN P Officer | 83,300 | Direct | Disposition (Non Open Market) at $9.61 - $12.87 per share. | N/A |
| 9-Jan-09 | ZHANG SHENGMAN Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | THOMAS LYDIA W Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | KAJI GAUTAM S Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | SCHMITZ RONALDO H Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | MACLEOD RODERICK Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | MCCANCE HENRY F Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | MCGILLICUDDY JOHN K Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | CLARKESON JOHN S Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | OBRIEN JOHN F Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | ENRIQUEZ CABOT JUAN Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | WRIGHTON MARK S Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 9-Jan-09 | GOLDSTEIN ARTHUR L Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 7-Oct-08 | SAN FRANCISCO PARTNERS LP Beneficial Owner (10% or more) | 208,400 | Indirect | Sale at $28.68 - $29.41 per share. | $6,053,0002 |
| 6-Oct-08 | SAN FRANCISCO PARTNERS LP Beneficial Owner (10% or more) | 117,700 | Indirect | Sale at $28.79 - $29.57 per share. | $3,434,0002 |
| 11-Sep-08 | MCGILLICUDDY JOHN K Director | 833 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Sep-08 | MCGILLICUDDY JOHN K Director | N/A | Direct | Statement of Ownership | N/A |
| 20-Aug-08 | BRADY WILLIAM J Officer | 7,500 | Direct | Sale at $26.70 per share. | $200,250 |
| 11-Aug-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 10,078,200 | Indirect | Statement of Ownership | N/A |
| 5-Aug-08 | KELLY JAMES PATRICK Officer | 10,000 | Direct | Acquisition (Non Open Market) at $9.61 per share. | $96,100 |
| 5-Aug-08 | BRADY WILLIAM J Officer | 41,500 | Direct | Acquisition (Non Open Market) at $9.61 per share. | $398,815 |
| 4-Aug-08 | MASON JONATHAN P Officer | 37,000 | Direct | Acquisition (Non Open Market) at $9.61 per share. | $355,570 |
| 4-Aug-08 | CORDEIRO EDUARDO E Officer | 46,000 | Direct | Acquisition (Non Open Market) at $9.61 per share. | $442,060 |
| 4-Aug-08 | BERUBE BRIAN A Officer | 30,000 | Direct | Acquisition (Non Open Market) at $9.61 per share. | $288,300 |
| 1-Aug-08 | BRADY WILLIAM J Officer | 3,790 | Direct | Sale at $26.35 per share. | $99,866 |
| 6-Jun-08 | KELLY JAMES PATRICK Officer | 1,000 | Direct | Sale at $32.01 per share. | $32,009 |
| 15-May-08 | KEOHANE SEAN D Officer | 3,358 | Indirect | Statement of Ownership | N/A |
| 15-May-08 | KEOHANE SEAN D Officer | 35,985 | Direct | Statement of Ownership | N/A |
| 13-May-08 | KELLY JAMES PATRICK Officer | 970 | Direct | Disposition (Non Open Market) at $32.37 per share. | $31,398 |
| 13-May-08 | BRADY WILLIAM J Officer | 9,342 | Direct | Disposition (Non Open Market) at $32.37 per share. | $302,400 |
| 13-May-08 | CORDEIRO EDUARDO E Officer | 8,174 | Direct | Disposition (Non Open Market) at $32.37 per share. | $264,592 |
| 13-May-08 | BERUBE BRIAN A Officer | 4,671 | Direct | Disposition (Non Open Market) at $32.37 per share. | $151,200 |
| 29-Feb-08 | PREVOST PATRICK M. Officer | 8,000 | Direct | Purchase at $28.21 per share. | $225,680 |
| 14-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 20,700 | Indirect | Purchase at $31.66 - $31.91 per share. | $658,0002 |
| 14-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 3,400 | Indirect | Purchase at $31.51 - $31.65 per share. | $107,0002 |
| 11-Jan-08 | ZHANG SHENGMAN Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | THOMAS LYDIA W Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | KAJI GAUTAM S Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | SCHMITZ RONALDO H Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | MACLEOD RODERICK Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | MCCANCE HENRY F Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | CLARKESON JOHN S Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | OBRIEN JOHN F Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | ENRIQUEZ CABOT JUAN Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | WRIGHTON MARK S Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 11-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 9,100 | Indirect | Purchase at $31.11 - $31.33 per share. | $284,0002 |
| 11-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 15,100 | Indirect | Purchase at $30.78 - $31.1 per share. | $467,0002 |
| 11-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 1,600 | Indirect | Purchase at $30.58 - $30.77 per share. | $49,0002 |
| 11-Jan-08 | GOLDSTEIN ARTHUR L Director | 2,500 | Direct | Acquisition (Non Open Market) at $0 per share. | N/A |
| 10-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 6,200 | Indirect | Purchase at $30.90 - $31.08 per share. | $192,0002 |
| 10-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 13,900 | Indirect | Purchase at $30.54 - $30.89 per share. | $427,0002 |
| 10-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 23,800 | Indirect | Purchase at $30.22 - $30.53 per share. | $723,0002 |
| 9-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 8,700 | Indirect | Purchase at $30.96 - $31.08 per share. | $270,0002 |
| 9-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 15,800 | Indirect | Purchase at $30.63 - $30.95 per share. | $486,0002 |
| 9-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 24,200 | Indirect | Purchase at $30.39 - $30.62 per share. | $738,0002 |
| 8-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 1,400 | Indirect | Purchase at $31.72 - $31.79 per share. | $44,0002 |
| 8-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 8,500 | Indirect | Purchase at $30.89 - $31.24 per share. | $264,0002 |
| 8-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 24,000 | Indirect | Purchase at $31.25 - $31.71 per share. | $756,0002 |
| 4-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 2,500 | Indirect | Purchase at $31.95 - $32.14 per share. | $80,0002 |
| 4-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 8,100 | Indirect | Purchase at $31.60 - $31.94 per share. | $257,0002 |
| 3-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 600 | Indirect | Purchase at $31.93 - $31.95 per share. | $19,0002 |
| 3-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 61,900 | Indirect | Purchase at $31.63 - $31.92 per share. | $1,967,0002 |
| 2-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 84,800 | Indirect | Purchase at $32.86 - $33.05 per share. | $2,795,0002 |
| 2-Jan-08 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 12,600 | Indirect | Purchase at $32.68 - $32.85 per share. | $413,0002 |
| 1-Jan-08 | PREVOST PATRICK M. Officer | 90,000 | Direct | Statement of Ownership | N/A |
| 31-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 60,600 | Indirect | Purchase at $33.47 - $33.65 per share. | $2,034,0002 |
| 31-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 38,400 | Indirect | Purchase at $33.31 - $33.46 per share. | $1,282,0002 |
| 28-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 32,458 | Indirect | Purchase at $33.85 - $34 per share. | $1,101,0002 |
| 28-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 15,700 | Indirect | Purchase at $33.43 - $33.84 per share. | $528,0002 |
| 28-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 22,042 | Indirect | Purchase at $33.21 - $33.42 per share. | $734,0002 |
| 27-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 14,600 | Indirect | Purchase at $33.49 - $33.59 per share. | $490,0002 |
| 27-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 40,200 | Indirect | Purchase at $33.19 - $33.48 per share. | $1,340,0002 |
| 27-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 1,300 | Indirect | Purchase at $33.13 - $33.18 per share. | $43,0002 |
| 26-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 15,300 | Indirect | Purchase at $33.45 - $33.75 per share. | $514,0002 |
| 24-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 3,700 | Indirect | Purchase at $33.48 - $33.5 per share. | $124,0002 |
| 24-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 14,900 | Indirect | Purchase at $33.14 - $33.47 per share. | $496,0002 |
| 24-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 1,500 | Indirect | Purchase at $33.06 - $33.12 per share. | $50,0002 |
| 21-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 25,000 | Indirect | Purchase at $33.27 - $33.5 per share. | $835,0002 |
| 20-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 4,100 | Indirect | Purchase at $33.30 - $33.4 per share. | $137,0002 |
| 20-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 67,923 | Indirect | Purchase at $33 - $33.29 per share. | $2,251,0002 |
| 20-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 15,177 | Indirect | Purchase at $32.83 - $32.99 per share. | $499,0002 |
| 19-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 13,300 | Indirect | Purchase at $33.36 - $33.5 per share. | $445,0002 |
| 19-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 69,300 | Indirect | Purchase at $33.06 - $33.35 per share. | $2,301,0002 |
| 18-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 6,900 | Indirect | Purchase at $32.96 - $33 per share. | $228,0002 |
| 18-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 24,600 | Indirect | Purchase at $32.62 - $32.95 per share. | $807,0002 |
| 17-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 14,000 | Indirect | Purchase at $32.89 - $33.19 per share. | $463,0002 |
| 17-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 500 | Indirect | Purchase at $33.20 per share. | $16,600 |
| 17-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 29,200 | Indirect | Purchase at $32.58 - $32.88 per share. | $956,0002 |
| 17-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 17,100 | Indirect | Purchase at $32.28 - $32.57 per share. | $554,0002 |
| 14-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 39,300 | Indirect | Purchase at $33.87 - $34 per share. | $1,334,0002 |
| 14-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 45,600 | Indirect | Purchase at $33.56 - $33.86 per share. | $1,537,0002 |
| 13-Dec-07 | SPO ADVISORY CORP Beneficial Owner (10% or more) | 34,400 | Indirect | Purchase at $33.99 - $34 per share. | $1,169,0002 |