| Date | Event |
| 13-Nov-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 9-Nov-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 9-Nov-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 10-Q, Quarterly Report |
| 4-Nov-09 | Pioneer Southwest Energy Partners L.P. Earnings Call scheduled for 12:00 pm ET today |
| 4-Nov-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Results of Operations and Financial Condition, Financial S |
| 3-Nov-09 | Ex-Date for dividend payment of $0.50 |
| 21-Oct-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Results of Operations and Financial Condition, Regulation |
| 19-Oct-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 16-Oct-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K/A, Financial Statements and Exhibits |
| 13-Oct-09 | Price hit new 52-week high ($22.05) |
| 12-Oct-09 | Price hit new 52-week high ($22.04) |
| 9-Oct-09 | Price hit new 52-week high ($21.87) |
| 3-Sep-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Entry into a Material Definitive Agreement, Completion of |
| 1-Sep-09 | Pioneer Southwest Energy Partners L.P. Announces Acquisition of Spraberry Properties Call scheduled for 10:00 am ET today |
| 19-Aug-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Entry into a Material Definitive Agreement, Financial Stat |
| 12-Aug-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 10-Q, Quarterly Report |
| 5-Aug-09 | Pioneer Southwest Energy Partners L.P. Earnings Call scheduled for 12:00 pm ET today |
| 5-Aug-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Results of Operations and Financial Condition, Financial S |
| 31-Jul-09 | Ex-Date for dividend payment of $0.50 |
| 17-Jun-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Financial Statements and Exhibits |
| 3-Jun-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Regulation FD Disclosure |
| 13-May-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 10-Q, Quarterly Report |
| 6-May-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Results of Operations and Financial Condition, Financial S |
| 31-Mar-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Entry into a Material Definitive Agreement, Regulation FD |
| 9-Mar-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Regulation FD Disclosure |
| 6-Mar-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 10-K, Annual Report |
| 4-Feb-09 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Results of Operations and Financial Condition, Financial S |
| 8-Dec-08 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Regulation FD Disclosure |
| 17-Nov-08 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Regulation FD Disclosure |
| 7-Nov-08 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 10-Q, Quarterly Report |
| 5-Nov-08 | PIONEER SOUTHWEST ENERGY PARTNERS L.P. Files SEC form 8-K, Results of Operations and Financial Condition, Financial S |