DAWSON GEOPHYSICAL CO NEW

Ticker: DWSN CUSIP: 239360100 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q2 2018
Shares 105 Value ($000) $1 Avg Close $6.03 Range $4.59 - $7.17
Q1 2018
Shares 100 Value ($000) $1 Avg Close $5.01 Range $3.96 - $5.79