Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Shaya Yaniv
 2. Date of Event Requiring Statement (Month/Day/Year)
11/08/2011		 3. Issuer Name and Ticker or Trading Symbol
IMPERVA INC [IMPV]
(Last)
(First)
(Middle)
C/O IMPERVA, INC., 3400 BRIDGE PARKWAY, SUITE 200		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP, Engineering
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

REDWOOD SHORES, CA 94065		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy)   (1) 10/22/2019 Common Stock 70,000 $ 1.68 D  
Stock Option (right to buy)   (2) 03/02/2021 Common Stock 20,000 $ 5.42 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Shaya Yaniv
C/O IMPERVA, INC.
3400 BRIDGE PARKWAY, SUITE 200
REDWOOD SHORES, CA 94065		       VP, Engineering  

Signatures

/s/ Tram Phi, by power of attorney 11/08/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) This Stock Option vests over four years of continuous service as follows: 25% of the underlying shares vest one year following the vesting commencement date of August 26, 2009, with the remaining 75% vesting in equal quarterly installments over the next three years. This Stock Option is 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.
(2) This Stock Option vests over three years of continuous service as follows: 25% of the underlying shares vest 27 months following the vesting commencement date of January 1, 2011, with the remaining 75% vesting in equal quarterly installments over the next nine months. This Stock Option is 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.

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