DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

GSA CAPITAL PARTNERS LLP's Holding History (CIK: 0001362033)

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

Q4 2014
Shares 11,336 Value ($000) $139 Avg Close — Range —
Q2 2014
Shares 9,497 Value ($000) $272 Avg Close — Range —
Q1 2014
Shares 22,851 Value ($000) $640 Avg Close — Range —
Q4 2013
Shares 12,451 Value ($000) $421 Avg Close — Range —
Q3 2013
Shares 16,153 Value ($000) $524 Avg Close — Range —
Q2 2013
Shares 13,553 Value ($000) $500 Avg Close — Range —