WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

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

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

Q1 2015
Shares 7,900 Value ($000) $26 Avg Close — Range —
Q4 2014
Shares 7,900 Value ($000) $49 Avg Close — Range —
Q3 2014
Shares 7,900 Value ($000) $66 Avg Close — Range —
Q2 2014
Shares 7,900 Value ($000) $97 Avg Close — Range —