DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

STRS OHIO's Holding History (CIK: 0000820478)

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

Q3 2014
Shares 11,600 Value ($000) $211 Avg Close — Range —
Q2 2014
Shares 12,100 Value ($000) $347 Avg Close — Range —
Q1 2014
Shares 21,550 Value ($000) $604 Avg Close — Range —
Q4 2013
Shares 22,200 Value ($000) $751 Avg Close — Range —
Q3 2013
Shares 24,800 Value ($000) $805 Avg Close — Range —
Q2 2013
Shares 20,700 Value ($000) $763 Avg Close — Range —