WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

GSA CAPITAL PARTNERS LLP's Holding History (CIK: 0001362033)

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

Q4 2014
Shares 89,482 Value ($000) $561 Avg Close — Range —
Q3 2014
Shares 99,682 Value ($000) $830 Avg Close — Range —
Q2 2014
Shares 65,682 Value ($000) $811 Avg Close — Range —
Q2 2013
Shares 31,944 Value ($000) $196 Avg Close — Range —