IMPERVA INC

CUSIP: 45321L100 Class: COM

WATER ISLAND CAPITAL LLC's Holding History (CIK: 0001222765)

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

Q4 2018
Shares 1,259,927 Value ($000) $70,165 Avg Close — Range —
Q3 2016
Shares 110,068 Value ($000) $5,912 Avg Close — Range —
Q2 2016
Shares 2,000 Value ($000) $86 Avg Close — Range —