DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

OXFORD ASSET MANAGEMENT LLP's Holding History (CIK: 0001438284)

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

Q4 2013
Shares 21,661 Value ($000) $733 Avg Close — Range —
Q3 2013
Shares 37,435 Value ($000) $1,216 Avg Close — Range —
Q2 2013
Shares 52,008 Value ($000) $1,917 Avg Close — Range —