WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q2 2016
Shares 59,785 Value ($000) $151 Avg Close — Range —
Q2 2014
Shares 48,602 Value ($000) $600 Avg Close — Range —
Q1 2014
Shares 14,200 Value ($000) $179 Avg Close — Range —