WILLIAMS CLAYTON ENERGY INC

CUSIP: 969490101 Class: CMN

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

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

Q2 2014
Shares 11,305 Value ($000) $1,553 Avg Close — Range —
Q1 2014
Shares 14,706 Value ($000) $1,662 Avg Close — Range —
Q4 2013
Shares 14,804 Value ($000) $1,214 Avg Close — Range —