WILLIAMS PARTNERS L P

CUSIP: 96950F104 Class: COM UNIT L P

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

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

Q4 2014
Shares 175,765 Value ($000) $7,865 Avg Close — Range —
Q3 2014
Shares 1,151,976 Value ($000) $61,113 Avg Close — Range —
Q2 2014
Shares 1,448,130 Value ($000) $78,619 Avg Close — Range —
Q1 2014
Shares 1,554,299 Value ($000) $79,176 Avg Close — Range —
Q4 2013
Shares 1,402,971 Value ($000) $71,355 Avg Close — Range —
Q3 2013
Shares 1,338,322 Value ($000) $73,226 Avg Close — Range —
Q2 2013
Shares 1,236,025 Value ($000) $63,771 Avg Close — Range —