WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q1 2015
Shares 24,398 Value ($000) $81 Avg Close — Range —
Q4 2014
Shares 31,198 Value ($000) $196 Avg Close — Range —
Q3 2014
Shares 36,398 Value ($000) $303 Avg Close — Range —
Q2 2014
Shares 36,398 Value ($000) $450 Avg Close — Range —
Q1 2014
Shares 33,498 Value ($000) $423 Avg Close — Range —
Q4 2013
Shares 39,398 Value ($000) $371 Avg Close — Range —
Q3 2013
Shares 62,718 Value ($000) $576 Avg Close — Range —
Q2 2013
Shares 65,818 Value ($000) $404 Avg Close — Range —