TGC INDS INC

CUSIP: 872417308 Class: CMN

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

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

Q1 2014
Shares 28,720 Value ($000) $171 Avg Close — Range —
Q4 2013
Shares 28,720 Value ($000) $210 Avg Close — Range —
Q3 2013
Shares 28,420 Value ($000) $224 Avg Close — Range —
Q2 2013
Shares 26,320 Value ($000) $216 Avg Close — Range —
Q1 2013
Shares 25,265 Value ($000) $250 Avg Close — Range —