| 2/21/2008 | MarkWest Announces Preliminary Results of Merger Consideration Elections |
| 2/21/2008 | MarkWest Announces Approval of Redemption and Merger |
| 2/5/2008 | MarkWest Hydrocarbon Provides Election Procedures Reminder |
| 1/25/2008 | MarkWest Hydrocarbon Declares Quarterly Cash Dividend of $0.36 per Share |
| 1/7/2008 | SEC Declares MarkWest Registration Statement / Joint Proxy Statement on Form S-4 Effective |
| 1/3/2008 | MarkWest Energy Partners and MarkWest Hydrocarbon Announce Record Date and Shareholder Meeting Date |
| 11/6/2007 | MarkWest Hydrocarbon Reports Third Quarter 2007 Financial Results |
| 10/31/2007 | MarkWest Hydrocarbon Announces Restatement of Certain Prior Periods |
| 10/26/2007 | MarkWest Hydrocarbon Declares Quarterly Cash Dividend of $0.36 per Share |
| 10/8/2007 | MarkWest Hydrocarbon Announces End of "Go-Shop" Period with No Parties Designated as Excluded Parties |
| 9/5/2007 | MarkWest Hydrocarbon to Merge with MarkWest Energy Partners |
| 8/8/2007 | MarkWest Hydrocarbon Reports Second Quarter 2007 Financial Results; Quarterly Cash Dividend Increases 50 Percent Compared to Prior Year Quarter |
| 7/20/2007 | MarkWest Hydrocarbon Increases Quarterly Cash Dividend to $0.36 Per Share |
| 5/7/2007 | MarkWest Hydrocarbon Reports First Quarter 2007 Financial Results |
| 4/20/2007 | MarkWest Hydrocarbon Declares First Quarter 2007 Cash Dividend of $0.32 Per Share |
| 3/6/2007 | MarkWest Hydrocarbon Reports 2006 Full Year and Fourth Quarter Financial Results |
| 2/21/2007 | MarkWest Hydrocarbon to Review Restructuring Alternatives with MarkWest Energy Partners |
| 1/26/2007 | MarkWest Hydrocarbon Declares a Quarterly Cash Dividend of $0.30 Per Share |
| 11/7/2006 | MarkWest Hydrocarbon Reports 2006 Third Quarter Results |
| 10/27/2006 | MarkWest Hydrocarbon Announces Election of Officers |
| 10/26/2006 | MarkWest Hydrocarbon Declares a Quarterly Cash Dividend of $0.28 Per Share |
| 8/22/2006 | MarkWest Hydrocarbon Announces Expansion and Extension of Credit Facilty |
| 8/7/2006 | MarkWest Hydrocarbon Reports 2006 Second Quarter Results |
| 7/27/2006 | MarkWest Hydrocarbon Declares a Quarterly Cash Dividend of $0.24 Per Share |
| 5/8/2006 | MarkWest Hydrocarbon Reports 2006 First Quarter Results |
| 4/27/2006 | MarkWest Hydrocarbon Declares a 10% Stock Dividend and a Quarterly Cash Dividend of $0.175 Per Share |
| 1/26/2006 | MarkWest Hydrocarbon Declares Quarterly Cash Dividend of $0.125 Per Share |