REX ENERGY CORPORATION

CUSIP: 761565100 Class: CMN

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

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

Q1 2016
Shares 102,308 Value ($000) $79 Avg Close — Range —
Q4 2015
Shares 89,162 Value ($000) $94 Avg Close — Range —
Q3 2015
Shares 87,510 Value ($000) $181 Avg Close — Range —
Q2 2015
Shares 87,810 Value ($000) $491 Avg Close — Range —
Q1 2015
Shares 87,413 Value ($000) $325 Avg Close — Range —
Q4 2014
Shares 89,113 Value ($000) $454 Avg Close — Range —
Q3 2014
Shares 88,734 Value ($000) $1,124 Avg Close — Range —
Q2 2014
Shares 87,730 Value ($000) $1,554 Avg Close — Range —
Q1 2014
Shares 82,030 Value ($000) $1,535 Avg Close — Range —
Q4 2013
Shares 81,730 Value ($000) $1,611 Avg Close — Range —
Q3 2013
Shares 81,330 Value ($000) $1,814 Avg Close — Range —
Q2 2013
Shares 78,780 Value ($000) $1,385 Avg Close — Range —
Q1 2013
Shares 74,891 Value ($000) $1,234 Avg Close — Range —