DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q4 2014
Shares 111,433 Value ($000) $1,363 Avg Close — Range —
Q3 2014
Shares 117,308 Value ($000) $2,133 Avg Close — Range —
Q2 2014
Shares 121,796 Value ($000) $3,489 Avg Close — Range —
Q1 2014
Shares 132,618 Value ($000) $3,714 Avg Close — Range —
Q4 2013
Shares 142,502 Value ($000) $4,819 Avg Close — Range —
Q3 2013
Shares 141,986 Value ($000) $4,610 Avg Close — Range —
Q2 2013
Shares 138,995 Value ($000) $5,124 Avg Close — Range —