MARKWEST ENERGY PARTNERS L P

CUSIP: 570759100 Class: UNIT LP PARTN

CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM's Holding History (CIK: 0000919079)

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

Q3 2015
Shares 336,760 Value ($000) $14,450 Avg Close — Range —
Q2 2015
Shares 336,760 Value ($000) $18,987 Avg Close — Range —
Q1 2015
Shares 358,760 Value ($000) $22,092 Avg Close — Range —
Q4 2014
Shares 358,760 Value ($000) $22,092 Avg Close — Range —
Q3 2014
Shares 336,860 Value ($000) $25,878 Avg Close — Range —
Q2 2014
Shares 336,860 Value ($000) $24,112 Avg Close — Range —
Q1 2014
Shares 345,960 Value ($000) $22,193 Avg Close — Range —
Q4 2013
Shares 336,460 Value ($000) $21,641 Avg Close — Range —
Q3 2013
Shares 325,760 Value ($000) $23,530 Avg Close — Range —
Q2 2013
Shares 322,483 Value ($000) $21,558 Avg Close — Range —