WILLIAMS CLAYTON ENERGY INC

CUSIP: 96949010 Class: COM

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's Holding History (CIK: 0001164508)

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

Q3 2014
Shares 17,522 Value ($000) $1,690 Avg Close — Range —
Q2 2014
Shares 40,633 Value ($000) $5,582 Avg Close — Range —
Q1 2014
Shares 2,668 Value ($000) $302 Avg Close — Range —