IMPERVA INC

CUSIP: 45321L100 Class: COM

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q4 2015
Shares 15,335 Value ($000) $971 Avg Close — Range —
Q3 2015
Shares 39,017 Value ($000) $2,555 Avg Close — Range —
Q2 2013
Shares 234,784 Value ($000) $10,575 Avg Close — Range —