DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q3 2014
Shares 2,119 Value ($000) $39 Avg Close — Range —
Q2 2014
Shares 860 Value ($000) $24 Avg Close — Range —
Q1 2014
Shares 1,513 Value ($000) $43 Avg Close — Range —
Q3 2013
Shares 1,373 Value ($000) $45 Avg Close — Range —
Q2 2013
Shares 2,900 Value ($000) $107 Avg Close — Range —