IMPERVA INC

CUSIP: 45321L100 Class: COM

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q2 2018
Shares 4,250 Value ($000) $205 Avg Close — Range —
Q4 2017
Shares 7,932 Value ($000) $315 Avg Close — Range —
Q1 2017
Shares 56 Value ($000) $2 Avg Close — Range —
Q3 2016
Shares 39,883 Value ($000) $2,142 Avg Close — Range —
Q2 2015
Shares 767 Value ($000) $52 Avg Close — Range —
Q1 2015
Shares 742 Value ($000) $32 Avg Close — Range —
Q4 2014
Shares 1,342 Value ($000) $66 Avg Close — Range —
Q3 2014
Shares 8,171 Value ($000) $235 Avg Close — Range —
Q2 2014
Shares 5,347 Value ($000) $140 Avg Close — Range —