| Date | Insider | Shares | Type | Transaction | Value* |
| 1-Dec-09 | ELVIG MARK F Officer | 200 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Dec-09 | ELVIG MARK F Officer | 54 | Direct | Disposition (Non Open Market) at $108.60 per share. | $5,864 |
| 9-Nov-09 | JOYCE RENE R Director | 7,000 | Direct | Sale at $110.29 per share. | $772,030 |
| 9-Nov-09 | PERNA JOSEPH R Director | 11,990 | Direct | Sale at $109.85 - $110.17 per share. | $1,319,0002 |
| 2-Nov-09 | DAVIS MONTY L Officer | 17,778 | Direct | Sale at $103.91 - $104.47 per share. | $1,852,0002 |
| 2-Nov-09 | BERGMARK RICHARD L Officer | 29,519 | Direct | Sale at $103.76 - $106.03 per share. | $3,096,0002 |
| 30-Oct-09 | BERGMARK RICHARD L Officer | 20,481 | Direct | Sale at $103.58 - $106.2 per share. | $2,148,0002 |
| 29-Oct-09 | DEMSHUR DAVID M Officer | 100,000 | Direct | Sale at $106.81 - $108.14 per share. | $10,748,0002 |
| 28-Oct-09 | MILLER CHARLES BRIGHAM Officer | 1,358 | Indirect | Sale at $106.28 per share. | $144,328 |
| 27-Oct-09 | ELVIG MARK F Officer | 200 | Direct | Purchase at $109.24 per share. | $21,848 |
| 26-Oct-09 | MILLER CHARLES BRIGHAM Officer | 25,480 | Direct | Sale at $112.29 - $114.23 per share. | $2,886,0002 |
| 15-Sep-09 | VRIESENDORP ALEXANDER Director | 2,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-Sep-09 | VRIESENDORP ALEXANDER Director | 1,040 | Direct | Disposition (Non Open Market) at $101.96 per share. | $106,038 |
| 15-Sep-09 | JOYCE RENE R Director | 2,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-Sep-09 | JOYCE RENE R Director | 3 | Direct | Disposition (Non Open Market) at $101.96 per share. | $305 |
| 15-Sep-09 | SCHOUTEN JACOBUS Director | 2,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-Sep-09 | SCHOUTEN JACOBUS Director | 1,040 | Direct | Disposition (Non Open Market) at $101.96 per share. | $106,038 |
| 15-Sep-09 | OGREN D JOHN Director | 2,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-Sep-09 | OGREN D JOHN Director | 3 | Direct | Disposition (Non Open Market) at $101.96 per share. | $305 |
| 15-Sep-09 | PERNA JOSEPH R Director | 2,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-Sep-09 | PERNA JOSEPH R Director | 4 | Direct | Disposition (Non Open Market) at $101.96 per share. | $407 |
| 15-Sep-09 | KEARNEY MICHAEL C Director | 2,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-Sep-09 | KEARNEY MICHAEL C Director | 3 | Direct | Disposition (Non Open Market) at $101.96 per share. | $305 |
| 22-May-09 | ELVIG MARK F Officer | 200 | Direct | Purchase at $87.01 per share. | $17,402 |
| 15-May-09 | MILLER CHARLES BRIGHAM Officer | 500 | Direct | Option Exercise at $0 per share. | N/A |
| 15-May-09 | MILLER CHARLES BRIGHAM Officer | 133 | Direct | Disposition (Non Open Market) at $83.33 per share. | $11,082 |
| 15-May-09 | DAVIS MONTY L Officer | 1,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-May-09 | DAVIS MONTY L Officer | 265 | Direct | Disposition (Non Open Market) at $83.33 per share. | $22,082 |
| 15-May-09 | BERGMARK RICHARD L Officer | 1,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-May-09 | BERGMARK RICHARD L Officer | 265 | Direct | Disposition (Non Open Market) at $83.33 per share. | $22,082 |
| 1-Apr-09 | ELVIG MARK F Officer | 350 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Apr-09 | ELVIG MARK F Officer | 93 | Direct | Disposition (Non Open Market) at $73.92 per share. | $6,874 |
| 1-Apr-09 | MILLER CHARLES BRIGHAM Officer | 350 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Apr-09 | MILLER CHARLES BRIGHAM Officer | 93 | Direct | Disposition (Non Open Market) at $73.92 per share. | $6,874 |
| 12-Mar-09 | ELVIG MARK F Officer | 695 | Direct | Purchase at $71.94 per share. | $49,998 |
| 9-Mar-09 | ELVIG MARK F Officer | 30 | Direct | Purchase at $71.94 - $72.45 per share. | $2,1652 |
| 1-Mar-09 | ELVIG MARK F Officer | 100 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Mar-09 | ELVIG MARK F Officer | 33 | Direct | Disposition (Non Open Market) at $75.40 per share. | $2,488 |
| 1-Mar-09 | MILLER CHARLES BRIGHAM Officer | 200 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Mar-09 | MILLER CHARLES BRIGHAM Officer | 66 | Direct | Disposition (Non Open Market) at $75.40 per share. | $4,976 |
| 1-Mar-09 | DAVIS MONTY L Officer | 1,100 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Mar-09 | DAVIS MONTY L Officer | 330 | Direct | Disposition (Non Open Market) at $75.40 per share. | $24,882 |
| 1-Mar-09 | BERGMARK RICHARD L Officer | 1,100 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Mar-09 | BERGMARK RICHARD L Officer | 341 | Direct | Disposition (Non Open Market) at $75.40 per share. | $25,711 |
| 25-Feb-09 | ELVIG MARK F Officer | 530 | Direct | Purchase at $73.88 - $73.89 per share. | $39,0002 |
| 23-Feb-09 | ELVIG MARK F Officer | 1,200 | Direct | Purchase at $69.42 per share. | $83,304 |
| 18-Feb-09 | ELVIG MARK F Officer | 484 | Indirect | Acquisition (Non Open Market) at $63.78 per share. | $30,869 |
| 17-Feb-09 | MILLER CHARLES BRIGHAM Officer | 200 | Direct | Disposition (Non Open Market) at $62.63 per share. | $12,526 |
| 1-Dec-08 | ELVIG MARK F Officer | 200 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Dec-08 | ELVIG MARK F Officer | 53 | Direct | Disposition (Non Open Market) at $58.20 per share. | $3,084 |
| 28-Jul-08 | DAVIS MONTY L Officer | 10,000 | Direct | Sale at $124.74 - $125.66 per share. | $1,252,0002 |
| 15-May-08 | MILLER CHARLES BRIGHAM Officer | 500 | Direct | Option Exercise at $0 per share. | N/A |
| 15-May-08 | MILLER CHARLES BRIGHAM Officer | 133 | Direct | Disposition (Non Open Market) at $134.69 per share. | $17,913 |
| 15-May-08 | DAVIS MONTY L Officer | 1,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-May-08 | DAVIS MONTY L Officer | 365 | Direct | Disposition (Non Open Market) at $134.69 per share. | $49,161 |
| 15-May-08 | BERGMARK RICHARD L Officer | 1,000 | Direct | Option Exercise at $0 per share. | N/A |
| 15-May-08 | BERGMARK RICHARD L Officer | 365 | Direct | Disposition (Non Open Market) at $134.69 per share. | $49,161 |
| 1-Apr-08 | ELVIG MARK F Officer | 79 | Indirect | Statement of Ownership | N/A |
| 1-Apr-08 | ELVIG MARK F Officer | 294 | Direct | Statement of Ownership | N/A |
| 1-Mar-08 | MILLER CHARLES BRIGHAM Officer | 200 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Mar-08 | MILLER CHARLES BRIGHAM Officer | 54 | Direct | Disposition (Non Open Market) at $121.60 per share. | $6,566 |
| 1-Mar-08 | DAVIS MONTY L Officer | 1,100 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Mar-08 | DAVIS MONTY L Officer | 403 | Direct | Disposition (Non Open Market) at $121.60 per share. | $49,004 |
| 1-Mar-08 | BERGMARK RICHARD L Officer | 1,100 | Direct | Option Exercise at $0 per share. | N/A |
| 1-Mar-08 | BERGMARK RICHARD L Officer | 402 | Direct | Disposition (Non Open Market) at $121.60 per share. | $48,883 |
| 29-Feb-08 | DEMSHUR DAVID M Officer | 14,045 | Direct | Sale at $122.72 - $123.15 per share. | $1,727,0002 |
| 29-Feb-08 | DEMSHUR DAVID M Officer | 26,733 | Direct | Sale at $121.35 - $122.71 per share. | $3,262,0002 |
| 29-Feb-08 | DEMSHUR DAVID M Officer | 9,222 | Direct | Sale at $121.05 - $121.33 per share. | $1,118,0002 |
| 28-Feb-08 | DEMSHUR DAVID M Officer | 16,876 | Direct | Sale at $125.01 - $125.25 per share. | $2,112,0002 |
| 28-Feb-08 | DEMSHUR DAVID M Officer | 33,124 | Direct | Sale at $124.15 - $125 per share. | $4,126,0002 |
| 27-Feb-08 | DAVIS MONTY L Officer | 6,000 | Direct | Disposition (Non Open Market) at $0 per share. | N/A |
| 27-Feb-08 | BERGMARK RICHARD L Officer | 26,730 | Direct | Sale at $126.73 - $127 per share. | $3,391,0002 |
| 27-Feb-08 | BERGMARK RICHARD L Officer | 44,261 | Direct | Sale at $125.70 - $126.72 per share. | $5,586,0002 |
| 27-Feb-08 | BERGMARK RICHARD L Officer | 15,259 | Direct | Sale at $124.88 - $125.5 per share. | $1,910,0002 |
| 26-Feb-08 | DAVIS MONTY L Officer | 400 | Direct | Sale at $128.54 - $128.56 per share. | $51,0002 |
| 26-Feb-08 | DAVIS MONTY L Officer | 7,200 | Direct | Sale at $127.35 - $128.5 per share. | $921,0002 |
| 26-Feb-08 | DAVIS MONTY L Officer | 19,024 | Direct | Sale at $127 - $127.34 per share. | $2,419,0002 |
| 26-Feb-08 | BERGMARK RICHARD L Officer | 13,750 | Direct | Sale at $127 - $127.6 per share. | $1,750,0002 |
| 12-Feb-08 | MILLER CHARLES BRIGHAM Officer | 5,000 | Direct | Option Exercise at $0 per share. | N/A |
| 12-Feb-08 | MILLER CHARLES BRIGHAM Officer | 1,365 | Direct | Disposition (Non Open Market) at $111.26 per share. | $151,869 |
| 12-Feb-08 | DENSON JOHN D Officer | 10,000 | Direct | Option Exercise at $0 per share. | N/A |
| 12-Feb-08 | DENSON JOHN D Officer | 3,687 | Direct | Disposition (Non Open Market) at $111.26 per share. | $410,215 |
| 12-Feb-08 | DAVIS MONTY L Officer | 20,000 | Direct | Option Exercise at $0 per share. | N/A |
| 12-Feb-08 | DAVIS MONTY L Officer | 7,324 | Direct | Disposition (Non Open Market) at $111.26 per share. | $814,868 |
| 12-Feb-08 | BERGMARK RICHARD L Officer | 20,000 | Direct | Option Exercise at $0 per share. | N/A |
| 12-Feb-08 | BERGMARK RICHARD L Officer | 7,328 | Direct | Disposition (Non Open Market) at $111.26 per share. | $815,313 |
| 12-Feb-08 | DEMSHUR DAVID M Officer | 40,000 | Direct | Option Exercise at $0 per share. | N/A |
| 12-Feb-08 | DEMSHUR DAVID M Officer | 14,596 | Direct | Disposition (Non Open Market) at $111.26 per share. | $1,623,950 |