DAWSON GEOPHYSICAL CO

CUSIP: 239359102 Class: CMN

GREAT WEST LIFE ASSURANCE CO /CAN/'s Holding History (CIK: 0001046192)

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

Q3 2014
Shares 3,600 Value ($000) $66 Avg Close — Range —
Q2 2014
Shares 3,600 Value ($000) $103 Avg Close — Range —