GASTAR EXPL LTD

CUSIP: 367299203 Class: CMN

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

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

Q4 2013
Shares 99,996 Value ($000) $692 Avg Close — Range —
Q3 2013
Shares 99,996 Value ($000) $395 Avg Close — Range —
Q2 2013
Shares 107,331 Value ($000) $287 Avg Close — Range —
Q1 2013
Shares 102,287 Value ($000) $180 Avg Close — Range —