WILLIAMS CLAYTON ENERGY INC

CUSIP: 969490101 Class: CMN

NATIXIS ADVISORS, L.P.'s Holding History (CIK: 0001018331)

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

Q4 2014
Shares 22,706 Value ($000) $1,449 Avg Close — Range —
Q3 2014
Shares 23,616 Value ($000) $2,277 Avg Close — Range —
Q2 2014
Shares 48,048 Value ($000) $6,600 Avg Close — Range —
Q1 2014
Shares 60,822 Value ($000) $6,874 Avg Close — Range —
Q4 2013
Shares 78,128 Value ($000) $6,402 Avg Close — Range —
Q3 2013
Shares 66,068 Value ($000) $3,466 Avg Close — Range —
Q2 2013
Shares 52,790 Value ($000) $2,296 Avg Close — Range —