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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1364962	Imperva Inc	IMPV	Services-Prepackaged Software (7372)	030460133

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
937889	Associates Venrock	C/O Venrock 3340 Hillview Ave. Palo Alto CA 94304	No	No	Yes	No
1119517	Venrock Associates Iii Lp	C/O Venrock 3340 Hillview Ave. Palo Alto CA 94304	No	No	Yes	No
1141515	Venrock Entrepreneurs Fund Iii Lp	C/O Venrock 3340 Hillview Ave. Palo Alto CA 94304	No	No	Yes	No
1239246	Vef Management Iii Llc	C/O Venrock 3340 Hillview Ave. Palo Alto CA 94304	No	No	Yes	No
1239247	Venrock Management Iii Llc	C/O Venrock 3340 Hillview Ave. Palo Alto CA 94304	No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-11-09	153,369	$18.00	153,369	No	4	P	Indirect	By Funds

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By Funds

Footnotes

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.