MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

TCW GROUP INC's Holding History (CIK: 0000850401)

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

Q3 2015
Shares 11,351 Value ($000) $487 Avg Close — Range —
Q3 2014
Shares 33,621 Value ($000) $2,583 Avg Close — Range —