WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

SIMPLEX TRADING, LLC's Holding History (CIK: 0001488542)

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

Q4 2017
Shares 99 Value ($000) $0 Avg Close — Range —
Q3 2017
Shares 11,063 Value ($000) $35 Avg Close — Range —
Q3 2016
Shares 625 Value ($000) $1 Avg Close — Range —
Q4 2014
Shares 1,108 Value ($000) $7 Avg Close — Range —