WILLBROS GROUP INC DEL

CUSIP: 969203108 Class: COMMON STOCK

CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT's Holding History (CIK: 0001329375)

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

Q1 2014
Shares 30,000 Value ($000) $379 Avg Close — Range —