MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

Clearbridge Investments, LLC's Holding History (CIK: 0001348883)

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

Q3 2015
Shares 7,919,126 Value ($000) $339,810 Avg Close — Range —
Q2 2015
Shares 7,985,641 Value ($000) $450,230 Avg Close — Range —
Q1 2015
Shares 7,821,751 Value ($000) $517,018 Avg Close — Range —
Q4 2014
Shares 7,109,481 Value ($000) $477,686 Avg Close — Range —
Q3 2014
Shares 5,759,251 Value ($000) $442,426 Avg Close — Range —
Q2 2014
Shares 5,515,831 Value ($000) $394,823 Avg Close — Range —
Q1 2014
Shares 5,631,361 Value ($000) $367,841 Avg Close — Range —
Q4 2013
Shares 5,635,426 Value ($000) $372,671 Avg Close — Range —
Q3 2013
Shares 5,541,573 Value ($000) $400,268 Avg Close — Range —
Q2 2013
Shares 5,131,943 Value ($000) $343,071 Avg Close — Range —