| Date | Event |
| 13-Nov-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 6-Nov-09 | PIONEER NATURAL RESOURCES CO Files SEC form 10-Q, Quarterly Report |
| 4-Nov-09 | Pioneer Natural Resources Company Earnings Call scheduled for 10:00 am ET today |
| 4-Nov-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements |
| 3-Nov-09 | Earnings announcement |
| 27-Oct-09 | Price hit new 52-week high ($46.39) |
| 26-Oct-09 | Price hit new 52-week high ($46.02) |
| 21-Oct-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Results of Operations and Financial Condition, Regulation FD Disclos |
| 21-Oct-09 | Price hit new 52-week high ($45.14) |
| 16-Oct-09 | Coverage initiated on Pioneer Natural Resources by Caris & Company |
| 28-Sep-09 | Ex-Date for dividend payment of $0.04 |
| 22-Sep-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 9-Sep-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 27-Aug-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Entry into a Material Definitive Agreement, Financial Statements and |
| 11-Aug-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 10-Aug-09 | PIONEER NATURAL RESOURCES CO Files SEC form 10-Q, Quarterly Report |
| 5-Aug-09 | Pioneer Natural Resources Company Earnings Call scheduled for 10:00 am ET today |
| 5-Aug-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements |
| 18-Jun-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and |
| 28-May-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and |
| 27-May-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 20-May-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 11-May-09 | PIONEER NATURAL RESOURCES CO Files SEC form 10-Q, Quarterly Report |
| 6-May-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements |
| 5-May-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Entry into a Material Definitive Agreement, Financial Statements and |
| 28-Apr-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 22-Apr-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Change in Directors or Principal Officers |
| 20-Apr-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 19-Mar-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Entry into a Material Definitive Agreement, Financial Statements and |
| 9-Mar-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 9-Mar-09 | Price hit new 52-week low ($11.88) |
| 3-Mar-09 | Price hit new 52-week low ($12.51) |
| 2-Mar-09 | Price hit new 52-week low ($12.53) |
| 25-Feb-09 | PIONEER NATURAL RESOURCES CO Files SEC form 10-K, Annual Report |
| 24-Feb-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Change in Directors or Principal Officers |
| 4-Feb-09 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements |
| 26-Nov-08 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 25-Nov-08 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and |
| 12-Nov-08 | PIONEER NATURAL RESOURCES CO Files SEC form 8-K, Regulation FD Disclosure |
| 7-Nov-08 | PIONEER NATURAL RESOURCES CO Files SEC form 10-Q, Quarterly Report |
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