WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

CITADEL ADVISORS LLC's Holding History (CIK: 0001423053)

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

Q4 2017
Shares 28,748 Value ($000) $41 Avg Close — Range —
Q3 2017
Shares 31,023 Value ($000) $100 Avg Close — Range —
Q4 2016
Shares 14,067 Value ($000) $46 Avg Close — Range —
Q2 2016
Shares 126,666 Value ($000) $320 Avg Close — Range —
Q1 2016
Shares 39,705 Value ($000) $85 Avg Close — Range —
Q4 2015
Shares 13,367 Value ($000) $36 Avg Close — Range —
Q2 2015
Shares 65,569 Value ($000) $84 Avg Close — Range —
Q1 2015
Shares 102,888 Value ($000) $340 Avg Close — Range —
Q4 2014
Shares 77,502 Value ($000) $486 Avg Close — Range —
Q2 2014
Shares 45,883 Value ($000) $567 Avg Close — Range —
Q1 2014
Shares 98,906 Value ($000) $1,249 Avg Close — Range —
Q4 2013
Shares 29,826 Value ($000) $280 Avg Close — Range —
Q3 2013
Shares 120,178 Value ($000) $1,104 Avg Close — Range —
Q2 2013
Shares 377,788 Value ($000) $2,320 Avg Close — Range —