MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q3 2015
Shares 2,585 Value ($000) $111 Avg Close — Range —
Q2 2015
Shares 3,263 Value ($000) $184 Avg Close — Range —
Q1 2015
Shares 1,871 Value ($000) $124 Avg Close — Range —
Q4 2014
Shares 320 Value ($000) $22 Avg Close — Range —
Q3 2014
Shares 50 Value ($000) $4 Avg Close — Range —
Q1 2014
Shares 93 Value ($000) $6 Avg Close — Range —
Q4 2013
Shares 5,094 Value ($000) $337 Avg Close — Range —
Q2 2013
Shares 153 Value ($000) $10 Avg Close — Range —