DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

TWO SIGMA INVESTMENTS, LP's Holding History (CIK: 0001179392)

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

Q4 2014
Shares 67,174 Value ($000) $822 Avg Close — Range —
Q3 2014
Shares 19,047 Value ($000) $346 Avg Close — Range —
Q2 2014
Shares 16,671 Value ($000) $478 Avg Close — Range —
Q1 2014
Shares 17,596 Value ($000) $493 Avg Close — Range —
Q4 2013
Shares 27,571 Value ($000) $932 Avg Close — Range —
Q3 2013
Shares 18,994 Value ($000) $617 Avg Close — Range —
Q2 2013
Shares 29,827 Value ($000) $1,100 Avg Close — Range —