MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

FMR LLC's Holding History (CIK: 0000315066)

Note: Option positions (PUT/CALL) are excluded.

Q3 2015
Shares 6,278,291 Value ($000) $269,401 Avg Close — Range —
Q2 2015
Shares 7,148,391 Value ($000) $403,026 Avg Close — Range —
Q1 2015
Shares 6,722,291 Value ($000) $444,343 Avg Close — Range —
Q4 2014
Shares 5,896,091 Value ($000) $396,158 Avg Close — Range —
Q3 2014
Shares 6,443,391 Value ($000) $494,981 Avg Close — Range —
Q2 2014
Shares 6,991,301 Value ($000) $500,437 Avg Close — Range —
Q1 2014
Shares 5,806,491 Value ($000) $379,280 Avg Close — Range —
Q4 2013
Shares 4,872,191 Value ($000) $322,198 Avg Close — Range —
Q3 2013
Shares 4,724,903 Value ($000) $341,280 Avg Close — Range —
Q2 2013
Shares 3,982,503 Value ($000) $266,231 Avg Close — Range —