DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

BANK OF MONTREAL /CAN/'s Holding History (CIK: 0000927971)

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

Q4 2014
Shares 37 Value ($000) $0 Avg Close — Range —
Q3 2014
Shares 10,285 Value ($000) $187 Avg Close — Range —
Q2 2014
Shares 10,559 Value ($000) $303 Avg Close — Range —
Q1 2014
Shares 11,485 Value ($000) $321 Avg Close — Range —
Q4 2013
Shares 20,221 Value ($000) $684 Avg Close — Range —
Q3 2013
Shares 15,777 Value ($000) $512 Avg Close — Range —
Q2 2013
Shares 12,580 Value ($000) $464 Avg Close — Range —