WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

TWO SIGMA ADVISERS, LP's Holding History (CIK: 0001478735)

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

Q2 2015
Shares 25,390 Value ($000) $32 Avg Close — Range —
Q4 2014
Shares 18,889 Value ($000) $118 Avg Close — Range —
Q1 2014
Shares 26,689 Value ($000) $337 Avg Close — Range —