| Date | Event |
| 17-Nov-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 10-Nov-09 | MarkWest Energy Partners LP Earnings Call scheduled for 4:00 pm ET today |
| 10-Nov-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements |
| 9-Nov-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 10-Q, Quarterly Report |
| 9-Nov-09 | Earnings announcement |
| 4-Nov-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 29-Oct-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 29-Oct-09 | Ex-Date for dividend payment of $0.64 |
| 26-Oct-09 | Price hit new 52-week high ($27.30) |
| 22-Oct-09 | MarkWest Energy downgraded by Wells Fargo |
| 20-Oct-09 | Price hit new 52-week high ($27.21) |
| 19-Oct-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 19-Oct-09 | Price hit new 52-week high ($26.84) |
| 6-Oct-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 30-Sep-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 16-Sep-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 15-Sep-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 10-Sep-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 3-Sep-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 14-Aug-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Entry into a Material Definitive Agreement, Regulation FD Disclosure |
| 12-Aug-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Entry into a Material Definitive Agreement, Regulation FD Disclosure |
| 11-Aug-09 | MarkWest Energy Partners LP Earnings Call scheduled for 4:00 pm ET today |
| 11-Aug-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements |
| 10-Aug-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 10-Q, Quarterly Report |
| 30-Jul-09 | Ex-Date for dividend payment of $0.64 |
| 24-Jul-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 1-Jul-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events |
| 10-Jun-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Entry into a Material Definitive Agreement, Regulation FD Disclosure |
| 3-Jun-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 27-May-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Entry into a Material Definitive Agreement, Creation of a Direct Fin |
| 18-May-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 12-May-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements |
| 11-May-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 7-May-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 24-Apr-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Other Events, Financial Statements and Exhibits |
| 23-Apr-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure |
| 30-Mar-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 24-Mar-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Change in Directors or Principal Officers |
| 13-Mar-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 4-Mar-09 | MARKWEST ENERGY PARTNERS L P Files SEC form 8-K, Completion of Acquisition or Disposition of Assets, Other Events, Fi |