MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q3 2015
Shares 9,096 Value ($000) $390 Avg Close — Range —
Q2 2015
Shares 4,257 Value ($000) $240 Avg Close — Range —
Q1 2015
Shares 4,257 Value ($000) $281 Avg Close — Range —
Q4 2014
Shares 10,605 Value ($000) $713 Avg Close — Range —
Q3 2014
Shares 10,115 Value ($000) $777 Avg Close — Range —
Q2 2014
Shares 6,490 Value ($000) $465 Avg Close — Range —