MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q3 2015
Shares 4,100 Value ($000) $176 Avg Close — Range —
Q2 2015
Shares 4,100 Value ($000) $231 Avg Close — Range —
Q1 2015
Shares 4,100 Value ($000) $271 Avg Close — Range —
Q4 2014
Shares 4,100 Value ($000) $275 Avg Close — Range —
Q3 2014
Shares 4,490 Value ($000) $345 Avg Close — Range —
Q2 2014
Shares 4,100 Value ($000) $293 Avg Close — Range —
Q1 2014
Shares 4,100 Value ($000) $268 Avg Close — Range —
Q4 2013
Shares 4,100 Value ($000) $271 Avg Close — Range —
Q3 2013
Shares 4,100 Value ($000) $296 Avg Close — Range —