FORM 4
[ X ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

NAGDEV SUNIL D 		2. Issuer Name and Ticker or Trading Symbol

IMPERVA INC [ IMPV ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Chief Customer Officer
(Last)          (First)          (Middle)

C/O IMPERVA, INC., 3400 BRIDGE PARKWAY 		3. Date of Earliest Transaction (MM/DD/YYYY)

2/6/2018
(Street)

REDWOOD SHORES, CA 94065
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units     (1) 2/6/2018     A      7307         (2) 2/5/2027   (3) Common Stock   7307   $0.00   7307   D    
Restricted Stock Units     (1) 2/6/2018     A      4092         (4) 4/24/2027   (3) Common Stock   4092   $0.00   4092   D    

Explanation of Responses:
(1)  Each restricted stock unit represents a contingent right to receive one share of common stock of the issuer upon vesting.
(2)  On February 6, 2017, the compensation committee of the board of directors granted performance-based restricted stock units subject to the Issuer's achievement of performance conditions for the year ended December 31, 2017. On February 6, 2018, the compensation committee determined that the performance conditions had been achieved at 58.46% of the target and awarded the restricted stock units, which vest as to 12.5% of the underlying shares on February 15, 2018, with the remainder vesting quarterly in 12.5% increments. The restricted stock units are subject to accelerated vesting in the event of a termination of employment of the Reporting Person under certain circumstances following a change in control of the Issuer.
(3)  The Issuer has up to 30 days following vesting to settle. The actual expiration date will be immediately following settlement.
(4)  On April 25, 2017, the compensation committee of the board of directors granted performance-based restricted stock units subject to the Issuer's achievement of performance conditions for the year ended December 31, 2017. On February 6, 2018, the compensation committee determined that the performance conditions had been achieved at 58.46% of the target and awarded the restricted stock units, which vest as to 12.5% of the underlying shares on May 15, 2018, with the remainder vesting quarterly in 12.5% increments. The restricted stock units are subject to accelerated vesting in the event of a termination of employment of the Reporting Person under certain circumstances following a change in control of the Issuer.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
NAGDEV SUNIL D
C/O IMPERVA, INC.
3400 BRIDGE PARKWAY
REDWOOD SHORES, CA 94065

Chief Customer Officer

Signatures
/s/ Shulamite White, Attorney-in-Fact 2/8/2018
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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