OPTIMER PHARMACEUTICALS INC

CUSIP: 68401H104 Class: CMN

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q3 2013
Shares 87,568 Value ($000) $1,103 Avg Close — Range —
Q2 2013
Shares 84,900 Value ($000) $1,229 Avg Close — Range —
Q1 2013
Shares 81,803 Value ($000) $973 Avg Close — Range —