Stock Trading History of Semple Frank M

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Semple Frank M since year 2005. The trader's CIK number is 1270065. At the time of this reporting, Semple Frank M is the President, CEO of Markwest Energy Partners L P . (stock ticker symbol MWE). See this page for all insider trading activities at Markwest Energy Partners L P .
Note that in the past SEMPLE FRANK M also reported insider trading activities as an insider of the following companies:

Insider Activities at Markwest Energy Partners L P (MWE)
Insider Activities at Markwest Hydrocarbon Inc (MWP)

Stock purchases, sales, and option exercises reported by insider *Semple Frank M* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-09-09	MWE	Markwest Energy Partners L P	Purchase	5,000	30.77	153,864
2008-01-31	MWE	Markwest Energy Partners L P	Option Exercise	2,214	.00	0
2008-01-08	MWP	Markwest Hydrocarbon Inc	Option Exercise	12,100	8.40	101,700
2007-01-31	MWE	Markwest Energy Partners L P	Option Exercise	1,107	.00	0
2006-08-30	MWE	Markwest Energy Partners L P	Option Exercise	1,875	48.40	90,750
2006-01-31	MWE	Markwest Energy Partners L P	Option Exercise	1,109	.00	0

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 Semple Frank M (President, CEO of Markwest Energy Partners L P at the time of this reporting) see the Securities and Exchange Commission (SEC) website.