IMPERVA INC

CUSIP: 45321L100 Class: COM

Calamos Advisors LLC's Holding History (CIK: 0001316507)

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

Q2 2015
Shares 9,200 Value ($000) $623 Avg Close — Range —
Q1 2015
Shares 12,870 Value ($000) $550 Avg Close — Range —
Q4 2014
Shares 9,470 Value ($000) $468 Avg Close — Range —
Q3 2013
Shares 9,700 Value ($000) $408 Avg Close — Range —