DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q4 2014
Shares 3,600 Value ($000) $44 Avg Close — Range —
Q3 2014
Shares 3,600 Value ($000) $65 Avg Close — Range —
Q2 2014
Shares 4,200 Value ($000) $120 Avg Close — Range —
Q1 2014
Shares 4,223 Value ($000) $118 Avg Close — Range —
Q4 2013
Shares 4,223 Value ($000) $143 Avg Close — Range —
Q3 2013
Shares 5,223 Value ($000) $170 Avg Close — Range —
Q2 2013
Shares 5,900 Value ($000) $217 Avg Close — Range —