ZYGO CORP

CUSIP: 989855101 Class: CMN

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

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

Q1 2014
Shares 64,200 Value ($000) $946 Avg Close — Range —
Q4 2013
Shares 64,200 Value ($000) $943 Avg Close — Range —
Q3 2013
Shares 64,973 Value ($000) $1,038 Avg Close — Range —
Q2 2013
Shares 58,251 Value ($000) $921 Avg Close — Range —