SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
VENROCK ASSOCIATES III LP

(Last) (First) (Middle)
C/O VENROCK
3340 HILLVIEW AVE.

(Street)
PALO ALTO CA 94304

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
IMPERVA INC [ IMPV ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
11/09/2011
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X 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. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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
Common Stock 11/09/2011 P 153,369 A $18 153,369 I By Funds(1)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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 (Month/Day/Year) 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: 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
1. Name and Address of Reporting Person*
VENROCK ASSOCIATES III LP

(Last) (First) (Middle)
C/O VENROCK
3340 HILLVIEW AVE.

(Street)
PALO ALTO CA 94304

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
VENROCK ASSOCIATES

(Last) (First) (Middle)
C/O VENROCK
3340 HILLVIEW AVE.

(Street)
PALO ALTO CA 94304

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
VENROCK ENTREPRENEURS FUND III LP

(Last) (First) (Middle)
C/O VENROCK
3340 HILLVIEW AVE.

(Street)
PALO ALTO CA 94304

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
VENROCK MANAGEMENT III LLC

(Last) (First) (Middle)
C/O VENROCK
3340 HILLVIEW AVE.

(Street)
PALO ALTO CA 94304

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
VEF MANAGEMENT III LLC

(Last) (First) (Middle)
C/O VENROCK
3340 HILLVIEW AVE.

(Street)
PALO ALTO CA 94304

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
Explanation of Responses:
1. Consists of (i) 122,695 shares of Common Stock held by Venrock Associates III, L.P. ("VA III"), (ii) 27,607 shares of Common Stock held by Venrock Associates ("VA"), and (iii) 3,067 shares of Common Stock held by Venrock Entrepreneurs Fund III, L.P. ("VEF III"). Venrock Management III, LLC ("VM III") is the general partner of VA III. VEF Management III, LLC ("VEFM") is the general partner of VEF III. VM III and VEFM disclaim beneficial ownership of these securities except to the extent of their respective pro-rata pecuniary interest therein.
Remarks:
/s/ David L. Stepp, authorized signatory 11/09/2011
** 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.
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