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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	Insider Title	Director	Officer	Large Shareholder	Other
1190636	M Steven Krausz	2735 Sand Hill Road Menlo Park CA 94025		Yes	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	150,823	$18.00	150,823	No	4	P	Indirect	Directly owned by USVP VIII
Common Stock	Acquisiton	2011-11-09	1,392	$18.00	1,392	No	4	P	Indirect	Directly owned by EP VIII-A
Common Stock	Acquisiton	2011-11-09	704	$18.00	704	No	4	P	Indirect	Directly owned by EP VIII-B

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	Directly owned by USVP VIII
No	4	P	Indirect	Directly owned by EP VIII-A
No	4	P	Indirect	Directly owned by EP VIII-B

Footnotes

This report is one of three reports each on a separate Form 4, but are related to the same transaction being filed by the reporting persons. Presidio Management Group VIII, LLC ("PMG VIII") is the general partner of US Venture Partners VIII, L.P. ("USVP VIII"), USVP Entrepreneur Partners VIII-A, L.P. ("EP VIII-A"), USVP Entrepreneur Partners VIII-B, L.P. ("EP VIII-B"), and USVP VIII Affiliates Fund, L.P. ("AFF VIII"), and Irwin Federman, Winston S. Fu, Steven M. Krausz, David E. Liddle, Jonathan D. Root, Christopher Rust, Casey M. Tansey, and Philip M. Young, the managing members of PMG VIII, may be deemed to share voting and dispositive power over the shares held by USVP VIII, EP VIII-A, EP VIII-B and AFF VIII. Such persons and entities disclaim beneficial ownership of shares held by USVP VIII, EP VIII-A, EP VIII-B and AFF VIII except to the extent of any pecuniary interest therein.