X0306 4/A 2015-12-01 2015-12-02 0 0000799165 DAWSON GEOPHYSICAL CO DWSN 0001506912 COOPER CRAIG W 18335 CHAPMANS COUNT ROAD CYPRESS TX 77433 1 0 0 0 Dawson Geophysical Company-Common Stock $0.01 par value 2015-12-01 4 A 0 9933 0 A 39238 D Craig W. Cooper 2015-12-03