MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

Janney Montgomery Scott LLC's Holding History (CIK: 0001329948)

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

Q3 2015
Shares 27,057 Value ($000) $1,161 Avg Close — Range —
Q2 2015
Shares 29,132 Value ($000) $1,642,462 Avg Close — Range —
Q1 2015
Shares 28,766 Value ($000) $1,901 Avg Close — Range —
Q4 2014
Shares 28,859 Value ($000) $1,939,036 Avg Close — Range —
Q3 2014
Shares 25,476 Value ($000) $1,957,066 Avg Close — Range —
Q2 2014
Shares 27,291 Value ($000) $1,953,490 Avg Close — Range —
Q1 2014
Shares 33,695 Value ($000) $2,200,957 Avg Close — Range —
Q4 2013
Shares 21,051 Value ($000) $1,392,120 Avg Close — Range —
Q3 2013
Shares 13,783 Value ($000) $995,546 Avg Close — Range —
Q2 2013
Shares 7,883 Value ($000) $526,979 Avg Close — Range —