MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

CYPRESS ASSET MANAGEMENT INC/TX's Holding History (CIK: 0001030618)

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

Q2 2015
Shares 49,841 Value ($000) $2,810 Avg Close — Range —
Q1 2015
Shares 54,257 Value ($000) $3,586 Avg Close — Range —
Q4 2014
Shares 55,729 Value ($000) $3,744 Avg Close — Range —
Q3 2014
Shares 53,294 Value ($000) $4,094 Avg Close — Range —
Q2 2014
Shares 54,444 Value ($000) $3,897 Avg Close — Range —
Q1 2014
Shares 55,594 Value ($000) $3,631 Avg Close — Range —
Q4 2013
Shares 57,085 Value ($000) $3,775 Avg Close — Range —
Q3 2013
Shares 57,840 Value ($000) $4,178 Avg Close — Range —
Q2 2013
Shares 56,850 Value ($000) $3,800 Avg Close — Range —