IMPERVA INC

CUSIP: 45321L100 Class: COM

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS's Holding History (CIK: 0001083190)

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

Q1 2015
Shares 15,480 Value ($000) $661 Avg Close — Range —
Q4 2014
Shares 28,530 Value ($000) $1,410 Avg Close — Range —
Q3 2013
Shares 11,230 Value ($000) $472 Avg Close — Range —
Q2 2013
Shares 12,910 Value ($000) $581 Avg Close — Range —