MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

Advisors Asset Management, Inc.'s Holding History (CIK: 0001297376)

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

Q3 2015
Shares 8,437 Value ($000) $362 Avg Close — Range —
Q2 2015
Shares 9,505 Value ($000) $536 Avg Close — Range —
Q1 2015
Shares 10,430 Value ($000) $689 Avg Close — Range —
Q4 2014
Shares 12,152 Value ($000) $816 Avg Close — Range —
Q3 2014
Shares 10,340 Value ($000) $794 Avg Close — Range —
Q2 2014
Shares 11,208 Value ($000) $802 Avg Close — Range —
Q1 2014
Shares 12,445 Value ($000) $813 Avg Close — Range —
Q4 2013
Shares 10,404 Value ($000) $688 Avg Close — Range —