PLAINS EXPL& PRODTN CO

CUSIP: 726505100 Class: COM

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

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

Q1 2013
Shares 15,435 Value ($000) $733 Avg Close — Range —
Q4 2012
Shares 13,905 Value ($000) $653 Avg Close — Range —
Q3 2012
Shares 3,919 Value ($000) $147 Avg Close — Range —
Q2 2012
Shares 3,513 Value ($000) $124 Avg Close — Range —
Q1 2012
Shares 132,451 Value ($000) $5,649 Avg Close — Range —
Q4 2011
Shares 79,252 Value ($000) $2,910 Avg Close — Range —