WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

CHARLES SCHWAB INVESTMENT MANAGEMENT INC's Holding History (CIK: 0000884546)

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

Q4 2017
Shares 69,500 Value ($000) $99 Avg Close — Range —
Q3 2017
Shares 69,500 Value ($000) $224 Avg Close — Range —
Q2 2017
Shares 69,500 Value ($000) $172 Avg Close — Range —
Q1 2017
Shares 69,500 Value ($000) $191 Avg Close — Range —
Q4 2016
Shares 69,500 Value ($000) $226 Avg Close — Range —
Q3 2016
Shares 69,500 Value ($000) $131 Avg Close — Range —
Q2 2016
Shares 69,500 Value ($000) $176 Avg Close — Range —
Q1 2015
Shares 333,563 Value ($000) $1,105 Avg Close — Range —
Q4 2014
Shares 90,245 Value ($000) $566 Avg Close — Range —
Q3 2014
Shares 106,146 Value ($000) $885 Avg Close — Range —
Q2 2014
Shares 85,989 Value ($000) $1,062 Avg Close — Range —
Q1 2014
Shares 152,476 Value ($000) $1,925 Avg Close — Range —
Q4 2013
Shares 135,534 Value ($000) $1,277 Avg Close — Range —
Q3 2013
Shares 142,160 Value ($000) $1,334 Avg Close — Range —
Q2 2013
Shares 149,615 Value ($000) $937 Avg Close — Range —