DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

TWO SIGMA ADVISERS, LP's Holding History (CIK: 0001478735)

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

Q4 2014
Shares 76,120 Value ($000) $931 Avg Close — Range —
Q3 2014
Shares 16,620 Value ($000) $302 Avg Close — Range —
Q2 2014
Shares 23,720 Value ($000) $680 Avg Close — Range —
Q1 2014
Shares 28,220 Value ($000) $790 Avg Close — Range —
Q4 2013
Shares 26,820 Value ($000) $907 Avg Close — Range —
Q3 2013
Shares 24,620 Value ($000) $799 Avg Close — Range —
Q2 2013
Shares 27,457 Value ($000) $1,011 Avg Close — Range —