DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q4 2014
Shares 16,994 Value ($000) $208 Avg Close — Range —
Q3 2014
Shares 16,094 Value ($000) $293 Avg Close — Range —
Q2 2014
Shares 16,094 Value ($000) $461 Avg Close — Range —
Q1 2014
Shares 16,454 Value ($000) $461 Avg Close — Range —
Q4 2013
Shares 16,854 Value ($000) $570 Avg Close — Range —
Q3 2013
Shares 17,554 Value ($000) $570 Avg Close — Range —
Q2 2013
Shares 17,613 Value ($000) $649 Avg Close — Range —