IMPERVA INC

CUSIP: 45321L100 Class: COM

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q2 2017
Shares 4,280 Value ($000) $205 Avg Close — Range —
Q1 2016
Shares 84,315 Value ($000) $4,258 Avg Close — Range —
Q4 2015
Shares 10,400 Value ($000) $658 Avg Close — Range —