WILLIAMS PARTNERS L P

CUSIP: 96950F104 Class: COM UNIT L P

AMERICAN CENTURY COMPANIES INC's Holding History (CIK: 0000748054)

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

Q4 2014
Shares 1,396,555 Value ($000) $62,496 Avg Close — Range —
Q3 2014
Shares 1,292,264 Value ($000) $68,555 Avg Close — Range —
Q2 2014
Shares 1,364,531 Value ($000) $74,080 Avg Close — Range —
Q1 2014
Shares 1,801,858 Value ($000) $91,787 Avg Close — Range —
Q4 2013
Shares 1,863,337 Value ($000) $94,769 Avg Close — Range —
Q3 2013
Shares 1,782,866 Value ($000) $94,278 Avg Close — Range —
Q2 2013
Shares 1,510,168 Value ($000) $77,925 Avg Close — Range —