WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

Walleye Trading LLC's Holding History (CIK: 0001388391)

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

Q1 2017
Shares 3,900 Value ($000) $11 Avg Close — Range —
Q2 2016
Shares 12,017 Value ($000) $30 Avg Close — Range —
Q1 2016
Shares 3,400 Value ($000) $7 Avg Close — Range —