WILLIAMS CLAYTON ENERGY INC

CUSIP: 969490101 Class: CMN

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q1 2017
Shares 18,780 Value ($000) $2,479 Avg Close — Range —
Q4 2016
Shares 20,348 Value ($000) $2,427 Avg Close — Range —
Q2 2014
Shares 11,405 Value ($000) $1,567 Avg Close — Range —