DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

PRELUDE CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001387508)

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

Q4 2014
Shares 11,800 Value ($000) $144 Avg Close — Range —
Q3 2014
Shares 4,300 Value ($000) $78 Avg Close — Range —
Q2 2014
Shares 6,100 Value ($000) $175 Avg Close — Range —
Q1 2014
Shares 2,000 Value ($000) $56 Avg Close — Range —
Q4 2013
Shares 1,000 Value ($000) $34 Avg Close — Range —
Q3 2013
Shares 1,000 Value ($000) $32 Avg Close — Range —
Q2 2013
Shares 2,305 Value ($000) $85 Avg Close — Range —