DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

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

Q4 2013
Shares 28,215 Value ($000) $955 Avg Close Range
Q3 2013
Shares 21,107 Value ($000) $686 Avg Close Range
Q2 2013
Shares 25,919 Value ($000) $956 Avg Close Range