COMBIMATRIX CORPORATION

CUSIP: 20009T303 Class: COM

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

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

Q4 2013
Shares 2,528 Value ($000) $6 Avg Close — Range —
Q3 2013
Shares 2,528 Value ($000) $7 Avg Close — Range —
Q2 2013
Shares 2,528 Value ($000) $8 Avg Close — Range —