WILLIAMS CLAYTON ENERGY INC

CUSIP: 969490101 Class: CMN

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

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

Q4 2014
Shares 48,661 Value ($000) $3,105 Avg Close — Range —
Q3 2014
Shares 39,976 Value ($000) $3,856 Avg Close — Range —
Q2 2014
Shares 4,352 Value ($000) $598 Avg Close — Range —