MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

ING GROEP NV's Holding History (CIK: 0001039765)

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

Q3 2015
Shares 2,005,000 Value ($000) $85,894 Avg Close — Range —
Q2 2015
Shares 860,000 Value ($000) $48,470 Avg Close — Range —
Q1 2015
Shares 930,000 Value ($000) $61,473 Avg Close — Range —
Q4 2014
Shares 760,000 Value ($000) $51,034 Avg Close — Range —
Q3 2014
Shares 235,199 Value ($000) $18,073 Avg Close — Range —
Q2 2014
Shares 1,110,199 Value ($000) $79,446 Avg Close — Range —
Q1 2014
Shares 1,060,199 Value ($000) $69,199 Avg Close — Range —
Q4 2013
Shares 949,000 Value ($000) $62,748 Avg Close — Range —
Q3 2013
Shares 984,000 Value ($000) $71,045 Avg Close — Range —