DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

BRIDGEWAY CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001107261)

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

Q4 2014
Shares 78,590 Value ($000) $961 Avg Close — Range —
Q3 2014
Shares 97,690 Value ($000) $1,776 Avg Close — Range —
Q2 2014
Shares 97,690 Value ($000) $2,799 Avg Close — Range —
Q1 2014
Shares 97,690 Value ($000) $2,736 Avg Close — Range —
Q4 2013
Shares 81,500 Value ($000) $2,756 Avg Close — Range —
Q3 2013
Shares 81,500 Value ($000) $2,646 Avg Close — Range —
Q2 2013
Shares 81,400 Value ($000) $3,000 Avg Close — Range —