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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1323885	Atricure Inc.	ATRC	Surgical & Medical Instruments & Apparatus (3841)	341940305

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1048637	M Philip Young	2735 Sand Hill Road Menlo Park CA 94025	No	No	Yes	No
1225484	C L L Viii Group Management Presidio	2735 Sand Hill Road Menlo Park CA 94025	No	No	Yes	No
1316575	J Christopher Rust	2735 Sand Hill Road Menlo Park CA 94025	No	No	Yes	No
1474322	M Casey Tansey	2735 Sand Hill Road Menlo Park CA 94025	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	Disposition	2012-06-06	350,000	$0.00	1,852,444	No	4	J	Indirect	Directly Held by USVP VIII
Common Stock	Disposition	2012-06-06	2,579	$0.00	14,452	No	4	J	Indirect	Directly Held by AFF VIII
Common Stock	Disposition	2012-06-07	3,279	$9.44	18,374	No	4	S	Indirect	Directly Held by EP VIII-A
Common Stock	Disposition	2012-06-07	1,759	$9.44	9,858	No	4	S	Indirect	Directly Held by EP VIII-B

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	J	Indirect	Directly Held by USVP VIII
No	4	J	Indirect	Directly Held by AFF VIII
No	4	S	Indirect	Directly Held by EP VIII-A
No	4	S	Indirect	Directly Held by EP VIII-B

Footnotes

Prorata distribution in kind from the partnership without consideration to its partners.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.67 to $9.20, inclusive. The reporting persons undertake to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4
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.