X0306 4 2018-02-02 0 0001364962 IMPERVA INC IMPV 0000905084 TESSLER ALLAN R C/O INTERNATIONAL FINANCIAL GROUP 2500 MOOSE-WILSON ROAD WILSON WY 83014 1 0 0 0 Common Stock 2018-02-02 4 M 0 1028 0.00 A 8933 D Common Stock 35000 I See Footnote Restricted Stock Units 2018-02-02 4 M 0 1028 0.00 D 2018-03-03 Common Stock 1028 0 D Represents the number of shares that were acquired in connection with the settlement of the restricted stock units listed in Table II. The shares are owned of record as follows: (A) 3,250 shares are held by International Financial GP of Nevada, of which the Reporting Person is the sole owner and Chair/CEO; (B) 7,500 shares are held by the Allan R. Tessler Charitable Remainder Unitrust #1 u/a/d 12-16-96, of which the Reporting Person is the sole trustee; (C) 7,500 Shares are held by the Allan R. Tessler Charitable Remainder Unitrust #2 u/a/d 12-16-96, of which the Reporting Person is the sole trustee; (D) 6,750 shares are held by Tessler Family Limited of which the Reporting Person is a limited partner; and (E) 10,000 shares are held by the ART FGT Family Partners Limited, of which the Reporting Person is a limited partner. Each restricted stock unit represents a contingent right to receive one share of common stock of the Issuer upon vesting. The restricted stock units vest as follows: one-third of the underlying shares vest one year following the vesting commencement date of February 2, 2015 with the remaining two-thirds vesting in equal annual installments over the next two years. The restricted stock units are subject to accelerated vesting as to 100% of such shares following a change in control of the Issuer. The Issuer has up to 30 days following vesting to settle. The actual expiration date will be immediately following settlement. /s/ Shulamite White, Attorney-in-Fact 2018-02-05