WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q4 2017
Shares 41,878 Value ($000) $59 Avg Close — Range —
Q3 2017
Shares 49,680 Value ($000) $160 Avg Close — Range —
Q2 2017
Shares 49,560 Value ($000) $122 Avg Close — Range —
Q1 2017
Shares 45,010 Value ($000) $123 Avg Close — Range —
Q4 2016
Shares 45,157 Value ($000) $146 Avg Close — Range —
Q3 2016
Shares 52,402 Value ($000) $99 Avg Close — Range —
Q2 2016
Shares 48,902 Value ($000) $124 Avg Close — Range —
Q1 2015
Shares 40,955 Value ($000) $136 Avg Close — Range —
Q4 2014
Shares 34,455 Value ($000) $216 Avg Close — Range —
Q3 2014
Shares 33,480 Value ($000) $279 Avg Close — Range —
Q2 2014
Shares 32,180 Value ($000) $397 Avg Close — Range —
Q1 2014
Shares 50,943 Value ($000) $643 Avg Close — Range —
Q4 2013
Shares 52,683 Value ($000) $496 Avg Close — Range —
Q3 2013
Shares 55,883 Value ($000) $513 Avg Close — Range —
Q2 2013
Shares 55,268 Value ($000) $339 Avg Close — Range —