1. Company Directors - H
2. Heppermann Donald C

Insider Trading History of Heppermann Donald C

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) by Heppermann Donald C since 2006. The trader's CIK number is 1235073. At the time of the last reporting, Heppermann Donald C was the Officer of Markwest Energy Partners L P. (stock ticker symbol MWE). Also see all insider trading activities at Markwest Energy Partners L P.

Note that in the past HEPPERMANN DONALD C also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Markwest Energy Partners L P (MWE) by Heppermann Donald C

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2010	MWE	500	$15,475	0	$0	0	$0
2009	MWE	1,000	$24,030	0	$0	0	$0
2008	MWE	0	$0	0	$0	334	$0
2007	MWE	0	$0	0	$0	166	$0
2006	MWE	0	$0	0	$0	167	$0

Yearly summary of insider trading at Markwest Hydrocarbon Inc (MWP) by Heppermann Donald C

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2008	MWP	0	$0	0	$0	6,655	$29,009
2006	MWP	0	$0	3,000	$67,809	13,914	$70,816

Insider trading activities at 2 companies by Heppermann Donald C:

1. Markwest Energy Partners L P (MWE)

2. Markwest Hydrocarbon Inc (MWP)

Table 1. Insider trading of Markwest Energy Partners L P (MWE) by Heppermann Donald C

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2010-03-19	MWE	Buy	500	30.95	15,475
2009-11-17	MWE	Buy	1,000	24.03	24,030
2008-01-31	MWE	Option Ex	334	.00	0
2007-01-31	MWE	Option Ex	166	.00	0
2006-01-31	MWE	Option Ex	167	.00	0

Table 2. Insider trading of Markwest Hydrocarbon Inc (MWP) by Heppermann Donald C

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2008-01-24	MWP	Option Ex	6,655	4.36	29,009
2006-08-18	MWP	Option Ex	1,210	10.58	12,799
2006-06-01	MWP	Option Ex	6,654	4.17	27,767
2006-03-28	MWP	Option Ex	6,050	5.00	30,250
2006-03-30	MWP	Sale	3,000	22.60	67,809

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Heppermann Donald C (Officer of Markwest Energy Partners L P at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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