MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

OBERMEYER WOOD INVESTMENT COUNSEL, LLLP's Holding History (CIK: 0001349654)

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

Q3 2015
Shares 238,198 Value ($000) $10,221 Avg Close — Range —
Q2 2015
Shares 238,198 Value ($000) $13,430 Avg Close — Range —
Q1 2015
Shares 238,648 Value ($000) $15,775 Avg Close — Range —
Q4 2014
Shares 238,848 Value ($000) $16,048 Avg Close — Range —