OM GROUP INC

CUSIP: 670872100 Class: COM

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

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

Q3 2015
Shares 55,345 Value ($000) $1,820 Avg Close — Range —
Q2 2015
Shares 55,445 Value ($000) $1,863 Avg Close — Range —
Q1 2015
Shares 55,245 Value ($000) $1,659 Avg Close — Range —
Q4 2014
Shares 59,545 Value ($000) $1,774 Avg Close — Range —
Q3 2014
Shares 59,292 Value ($000) $1,539 Avg Close — Range —
Q2 2014
Shares 58,655 Value ($000) $1,902 Avg Close — Range —
Q1 2014
Shares 58,055 Value ($000) $1,929 Avg Close — Range —
Q4 2013
Shares 57,855 Value ($000) $2,107 Avg Close — Range —
Q3 2013
Shares 57,455 Value ($000) $1,941 Avg Close — Range —
Q2 2013
Shares 55,712 Value ($000) $1,723 Avg Close — Range —
Q1 2013
Shares 56,306 Value ($000) $1,322 Avg Close — Range —