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Filing Details

Accession Number:: 0001179110-10-001338
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2010-01-21 12:00:00
Reporting Period:: 2010-01-19

Filing Date:: 2010-01-21
Accepted Time:: 2010-01-21 19:26:04
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1166036	Markwest Energy Partners L P	MWE	Crude Petroleum & Natural Gas (1311)	270005456

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1167209	M John Fox	C/O Markwest Energy Partners, L.p. 1515 Arapahoe St. Twr 2, Ste 700 Denver CO 80202		Yes	No	No	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Units	Disposition	2010-01-19	3,000	$29.97	918,990	No	4	S	Direct
Common Units	Disposition	2010-01-21	2,000	$29.60	916,990	No	4	S	Direct
Common Units	Disposition	2010-01-19	19,500	$29.98	5,590,966	No	4	S	Indirect	MWHC Holding, Inc.
Common Units	Disposition	2010-01-21	13,000	$29.58	5,577,966	No	4	S	Indirect	MWHC Holding, Inc.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Direct
No	4	S	Indirect	MWHC Holding, Inc.
No	4	S	Indirect	MWHC Holding, Inc.

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Units	1,865	Indirect	Bode Blanco, LLC

Footnotes

Units were sold pursuant to instructions by the reporting person on December 15, 2009, pursuant to a Rule 10b5-1 trading plan.
The price reported in Column 4 is a weighted average price. The units were sold in multiple transactions at prices ranging from $29.725 to $30.07, inclusive. The reporting person undertakes to provide to MarkWest Energy Partners, L.P., any security holder of MarkWest Energy Partners, L.P., or the staff of the Securities & Exchange Commission, upon request, full information regarding the number of units sold.
Amount of securities beneficially owned following the reported transaction(s) includes Common Units owned and Restricted Units subject to varying vesting terms.
The price reported in Column 4 is a weighted average price. The units were sold in multiple transactions at prices ranging from $29.37 to $29.99, inclusive. The reporting person undertakes to provide to MarkWest Energy Partners, L.P., any security holder of MarkWest Energy Partners, L.P., or the staff of the Securities & Exchange Commission, upon request, full information regarding the number of units sold.
The price reported in Column 4 is a weighted average price. The units were sold in multiple transactions at prices ranging from $29.74 to $30.07, inclusive. The reporting person undertakes to provide to MarkWest Energy Partners, L.P., any security holder of MarkWest Energy Partners, L.P., or the staff of the Securities & Exchange Commission, upon request, full information regarding the number of units sold.
The price reported in Column 4 is a weighted average price. The units were sold in multiple transactions at prices ranging from $29.35 to $30.01, inclusive. The reporting person undertakes to provide to MarkWest Energy Partners, L.P., any security holder of MarkWest Energy Partners, L.P., or the staff of the Securities & Exchange Commission, upon request, full information regarding the number of units sold.