MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

CAPITAL COUNSEL LLC/NY's Holding History (CIK: 0001114928)

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

Q2 2015
Shares 12,400 Value ($000) $699 Avg Close — Range —
Q1 2015
Shares 12,000 Value ($000) $793 Avg Close — Range —
Q4 2014
Shares 12,000 Value ($000) $806 Avg Close — Range —
Q3 2014
Shares 12,000 Value ($000) $922 Avg Close — Range —
Q2 2014
Shares 12,000 Value ($000) $859 Avg Close — Range —
Q1 2014
Shares 12,000 Value ($000) $784 Avg Close — Range —
Q4 2013
Shares 12,000 Value ($000) $794 Avg Close — Range —
Q3 2013
Shares 12,000 Value ($000) $867 Avg Close — Range —
Q2 2013
Shares 12,000 Value ($000) $802 Avg Close — Range —