DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q4 2013
Shares 21,991 Value ($000) $744 Avg Close — Range —
Q3 2013
Shares 21,991 Value ($000) $714 Avg Close — Range —
Q2 2013
Shares 24,700 Value ($000) $910 Avg Close — Range —