DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

GLOBEFLEX CAPITAL L P's Holding History (CIK: 0000921531)

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

Q1 2014
Shares 78 Value ($000) $2 Avg Close — Range —
Q4 2013
Shares 78 Value ($000) $2 Avg Close — Range —
Q3 2013
Shares 10,524 Value ($000) $341 Avg Close — Range —
Q2 2013
Shares 10,524 Value ($000) $387 Avg Close — Range —