X0306 4 2015-11-18 0 0001364962 IMPERVA INC IMPV 0001533439 Schmid Terrence J. C/O IMPERVA, INC. 3400 BRIDGE PARKWAY, SUITE 200 REDWOOD SHORES CA 94065 0 1 0 0 Chief Financial Officer Common Stock 2015-11-18 4 S 0 585 71.94 D 0 D Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $71.93 to $71.9462 per share. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. /s/ Tram Phi, attorney-in-fact 2015-11-20