ENSCO PLC ADR

CUSIP: 29358Q109 Class: COMMON STOCK-FO

Zurcher Kantonalbank (Zurich Cantonalbank)'s Holding History (CIK: 0001368163)

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

Q1 2012
Shares 105,718 Value ($000) $5,596 Avg Close — Range —
Q4 2011
Shares 77,950 Value ($000) $3,657 Avg Close — Range —