SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Schedule 13G
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b),
(c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b)
(Amendment No.___________)*
AtriCure, Inc.
--------------------------------------------------------------------------------
(Name of Issuer)
Common Stock
--------------------------------------------------------------------------------
(Title of Class of Securities)
04963C209
--------------------------------------------------------------------------------
(CUSIP Number)
December 31, 2005
--------------------------------------------------------------------------------
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
[ ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[X] Rule 13d-1(d)
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.
The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
(Continued on following pages)
Page 1 of 22 Pages
Exhibit Index Contained on Page 20
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 2 of 22
---------------------------------------- -------------------------------------
------------ ---------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
U.S. Venture Partners VIII, L.P. ("USVP VIII")
Tax ID Number:
------------ ---------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ ---------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ ---------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
------------ ---------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF 2,286,924 shares, of which 2,194,151 are outstanding shares and 92,773
SHARES are issuable upon the conversion of warrants; except that Presidio
BENEFICIALLY Management Group VIII, L.L.C. ("PMG VIII"), the general partner of
OWNED BY EACH REPORTING USVP VIII, may be deemed to have sole power to vote these shares, and
PERSON Timothy Connors ("Connors"), Irwin Federman ("Federman"), Winston Fu
WITH ("Fu"), Steven M. Krausz ("Krausz"), David Liddle ("Liddle"),
Jonathan D. Root ("Root"), Christopher Rust ("Rust") and Philip M.
Young ("Young") the managing members of PMG VIII, may be deemed to
have shared power to vote these shares.
-------- ------------------------------------------------------------------------
6 SHARED VOTING POWER
See response to row 5.
-------- ------------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
2,286,924 shares, of which 2,194,151 are outstanding shares and 92,773
are issuable upon the conversion of warrants; except that PMG VIII,
the general partner of USVP VIII, may be deemed to have the sole power
to dispose of these shares, and Connors, Federman, Fu, Krausz, Liddle,
Root, Rust and Young, the managing members of PMG VIII, may be deemed
to have shared power to dispose of these shares.
-------- ------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
See response to row 7.
------------------------------------ -------- ------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,286,924
------------ ---------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ ---------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.0%
------------ ---------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* PN
------------ ---------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 3 of 22
---------------------------------------- -------------------------------------
------------ ---------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
USVP VIII Affiliates Fund, L.P. ("USVP VIII AF")
Tax ID Number:
------------ ---------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ ---------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ ---------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
------------ ---------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF 17,653 shares, of which 16,970 are outstanding and 683 are issuable
SHARES upon the conversion of warrants; except that PMG VIII, the general
BENEFICIALLY partner of USVP VIII AF, may be deemed to have sole power to vote
OWNED BY EACH REPORTING these shares, and Connors, Federman, Fu, Krausz, Liddle, Root, Rust
PERSON and Young, the managing members of PMG VIII, may be deemed to have
WITH shared power to vote these shares.
-------- ------------------------------------------------------------------------
6 SHARED VOTING POWER
See response to row 5.
-------- ------------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
17,653 shares, of which 16,970 are outstanding and 683 are issuable
upon the conversion of warrants; except that PMG VIII, the general
partner of USVP VIII AF, may be deemed to have sole power to dispose
of these shares, and Connors, Federman, Fu, Krausz, Liddle, Root, Rust
and Young, the managing members of PMG VIII, may be deemed to have
shared power to dispose of these shares.
-------- ------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
See response to row 7.
------------------------------------ -------- ------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 17,653
------------ ---------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ ---------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.1%
------------ ---------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* PN
------------ ---------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 4 of 22
---------------------------------------- -------------------------------------
------------ ---------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
USVP Entrepreneur Partners VIII-A, L.P. ("USVP EP VIII-A")
Tax ID Number:
------------ ---------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ ---------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ ---------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
------------ ---------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF 22,444 shares, of which 21,575 are outstanding and 869 are issuable
SHARES upon conversion of warrants; except that PMG VIII, the general
BENEFICIALLY partner of USVP EP VIII-A, may be deemed to have sole power to vote
OWNED BY EACH REPORTING these shares, and Connors, Federman, Fu, Krausz, Liddle, Root, Rust
PERSON and Young, the managing members of PMG VIII, may be deemed to have
WITH shared power to vote these shares.
-------- ------------------------------------------------------------------------
6 SHARED VOTING POWER
See response to row 5.
-------- ------------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
22,444 shares, of which 21,575 are outstanding and 869 are issuable
upon conversion of warrants; except that PMG VIII, the general
partner of USVP EP VIII-A, may be deemed to have sole power to
dispose of these shares, and Connors, Federman, Fu, Krausz, Liddle,
Root, Rust and Young, the managing members of PMG VIII, may be deemed
to have shared power to dispose of these shares.
-------- ------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
See response to row 7.
------------------------------------ -------- ------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 22,444
------------ ---------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ ---------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.2%
------------ ---------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* PN
------------ ---------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 5 of 22
---------------------------------------- -------------------------------------
------------ ---------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
USVP Entrepreneur Partners VIII-B, L.P. ("USVP EP VIII-B")
Tax ID Number:
------------ ---------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ ---------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ ---------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
------------ ---------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF 12,041 shares, of which 11,575 are outstanding and 466 are issuable
SHARES upon conversion of warrants; except that PMG VIII, the general partner
BENEFICIALLY of USVP EP VIII-B, may be deemed to have sole power to vote these
OWNED BY EACH REPORTING shares, and Connors, Federman, Fu, Krausz, Liddle, Root, Rust and
PERSON Young, the managing members of PMG VIII, may be deemed to have shared
WITH power to vote these shares.
-------- ------------------------------------------------------------------------
6 SHARED VOTING POWER
See response to row 5.
-------- ------------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
12,041 shares, of which 11,575 are outstanding and 466 are issuable
upon conversion of warrants; except that PMG VIII, the general partner
of USVP EP VIII-B, may be deemed to have sole power to dispose of
these shares, and Connors, Federman, Fu, Krausz, Liddle, Root, Rust
and Young, the managing members of PMG VIII, may be deemed to have
shared power to dispose of these shares.
-------- ------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
See response to row 7.
------------------------------------ -------- ------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 12,041
------------ ---------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ ---------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.1%
------------ ---------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* PN
------------ ---------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 6 of 22
---------------------------------------- -------------------------------------
------------ ---------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Presidio Management Group VIII, L.L.C.
Tax ID Number:
------------ ---------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ ---------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ ---------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
------------ ---------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF 2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
SHARES 17,653 are directly owned by USVP VIII AF, 22,444 are directly owned by
BENEFICIALLY USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B. PMG
OWNED BY EACH REPORTING VIII, the general partner of USVP VIII, USVP VIII AF, USVP EP VIII-A
PERSON and USVP EP VIII-B, may be deemed to have sole power to vote these
WITH shares, and Connors, Federman, Fu, Krausz, Liddle, Root, Rust and
Young, the managing members of PMG VIII, may be deemed to have shared
power to vote these shares.
------- -------------------------------------------------------------------------
6 SHARED VOTING POWER
See response to row 5.
------- -------------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned by
USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B. PMG
VIII, the general partner of USVP VIII, USVP VIII AF, USVP EP VIII-A
and USVP EP VIII-B, may be deemed to have sole power to dispose of
these shares, and Connors, Federman, Fu, Krausz, Liddle, Root, Rust and
Young, the managing members of PMG VIII, may be deemed to have shared
power to dispose of these shares.
------- -------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
See response to row 7.
------------------------------------ ------- -------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ ---------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ ---------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ ---------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* OO
------------ ---------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 7 of 22
---------------------------------------- -------------------------------------
------------ ---------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
Timothy Connors
------------ ---------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ ---------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ ---------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
------------ ---------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
NUMBER OF 0 Shares
SHARES
BENEFICIALLY
OWNED BY EACH REPORTING
PERSON
WITH
-------- ------------------------------------------------------------------------
6 SHARED VOTING POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Connors, a managing member of PMG VIII, may
be deemed to have shared power to vote these shares.
-------- ------------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
0 Shares
-------- ------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Connors, a managing member of PMG VIII, may
be deemed to have shared power to dispose of these shares.
------------------------------------ -------- ------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ ---------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ ---------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ ---------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* IN
------------ ---------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 8 of 22
---------------------------------------- -------------------------------------
------------ ---------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
Irwin Federman
------------ ---------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ ---------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ ---------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
------------ ---------------------------------------------------------------------------------------------------------
NUMBER OF
SHARES 5 SOLE VOTING POWER
BENEFICIALLY 0 Shares
OWNED BY EACH
REPORTING
PERSON
WITH
-------- ------------------------------------------------------------------------
6 SHARED VOTING POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Federman, a managing member of PMG VIII,
may be deemed to have shared power to vote these shares.
-------- ------------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
0 Shares
-------- ------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Federman, a managing member of PMG VIII,
may be deemed to have shared power to dispose of these shares.
------------------------------------ -------- ------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ ---------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ ---------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ ---------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* IN
------------ ---------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 9 of 22
---------------------------------------- -------------------------------------
------------ --------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
Winston Fu
------------ --------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ --------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ --------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
------------ --------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 Shares
NUMBER OF
SHARES -------- -----------------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY EACH REPORTING 2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
PERSON 17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
WITH by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Fu, a managing member of PMG VIII, may be
deemed to have shared power to vote these shares.
-------- -----------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
0 Shares
-------- -----------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Fu, a managing member of PMG VIII, may be
deemed to have shared power to dispose of these shares.
------------------------------------ -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ --------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ --------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ --------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* IN
------------ --------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 10 of 22
---------------------------------------- -------------------------------------
------------ --------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
Steven M. Krausz
------------ --------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ --------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ --------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
------------ --------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 Shares
NUMBER OF
SHARES -------- -----------------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY EACH REPORTING 2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
PERSON 17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
WITH by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Krausz, a managing member of PMG VIII, may
be deemed to have shared power to vote these shares.
-------- -----------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
0 Shares
-------- -----------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Krausz, a managing member of PMG VIII, may
be deemed to have shared power to dispose of these shares.
------------------------------------ -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ --------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ --------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ --------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* IN
------------ --------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 11 of 22
---------------------------------------- -------------------------------------
------------ --------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
David Liddle
------------ --------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ --------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ --------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
------------ --------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 Shares
NUMBER OF
SHARES -------- -----------------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY EACH REPORTING 2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
PERSON 17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
WITH by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Liddle, a managing member of PMG VIII, may
be deemed to have shared power to vote these shares.
-------- -----------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
0 Shares
-------- -----------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Liddle, a managing member of PMG VIII, may
be deemed to have shared power to dispose of these shares.
------------------------------------ -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ --------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ --------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ --------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* IN
------------ --------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 12 of 22
---------------------------------------- -------------------------------------
------------ --------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
Jonathan D. Root
------------ --------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ --------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ --------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
------------ --------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 Shares
NUMBER OF
SHARES -------- -----------------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY EACH REPORTING 2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
PERSON 17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
WITH by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Root, a managing member of PMG VIII, may
be deemed to have shared power to vote these shares.
-------- -----------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
0 Shares
-------- -----------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Root, a managing member of PMG VIII, may
be deemed to have shared power to dispose of these shares.
------------------------------------ -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ --------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ --------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ --------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* IN
------------ --------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 13 of 22
---------------------------------------- -------------------------------------
------------ --------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
Christopher Rust
------------ --------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ --------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ --------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
------------ --------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 Shares
NUMBER OF
SHARES -------- -----------------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY EACH REPORTING 2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
PERSON 17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
WITH by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Rust, a managing member of PMG VIII, may
be deemed to have shared power to vote these shares.
-------- -----------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
0 Shares
-------- -----------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Rust, a managing member of PMG VIII, may
be deemed to have shared power to dispose of these shares.
------------------------------------ -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ --------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ --------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ --------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* IN
------------ --------------------------------------------------------------------------------------------------------
---------------------------------------- -------------------------------------
CUSIP NO. 04963C209 13 G Page 14 of 22
---------------------------------------- -------------------------------------
------------ --------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
Philip M. Young
------------ --------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) (b) X
------------ --------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
------------ --------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen
------------ --------------------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
0 Shares
NUMBER OF
SHARES -------- -----------------------------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY EACH REPORTING 2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
PERSON 17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
WITH by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Young, a managing member of PMG VIII, may
be deemed to have shared power to vote these shares.
-------- -----------------------------------------------------------------------
7 SOLE DISPOSITIVE POWER
0 Shares
-------- -----------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,339,062 shares, of which 2,286,924 are directly owned by USVP VIII,
17,653 are directly owned by USVP VIII AF, 22,444 are directly owned
by USVP EP VIII-A and 12,041 are directly owned by USVP EP VIII-B.
PMG VIII is the general partner of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B. Young, a managing member of PMG VIII, may
be deemed to have shared power to dispose of these shares.
------------------------------------ -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 2,339,062
------------ --------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
------------ --------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 19.4%
------------ --------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON* IN
------------ --------------------------------------------------------------------------------------------------------
------------------------------------- --------------------------
CUSIP NO. 04963C209 13 G Page 15 of 22
------------------------------------- --------------------------
ITEM 1(A). NAME OF ISSUER
--------------
AtriCure, Inc.
ITEM 1(B). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES
-----------------------------------------------
6033 Schumacher Park Drive
Cincinnati, OH 45069
ITEM 2(A). NAME OF PERSONS FILING
----------------------
This Statement is filed by Presidio Management Group VIII,
L.L.C., a Delaware limited liability company ("PMG VIII"),
U.S. Venture Partners VIII, L.P., a Delaware limited
partnership ("USVP VIII"), USVP VIII Affiliates Fund, L.P., a
Delaware limited partnership ("USVP VIII AF"), USVP
Entrepreneur Partners VIII-A, L.P., a Delaware limited
partnership ("USVP EP VIII-A"), U.S. Entrepreneur Partners
VIII-B, a Delaware limited partnership ("USVP EP VIII-B"),
Timothy Connors ("Connors"), Irwin Federman ("Federman"),
Winston Fu ("Fu"), Steven M. Krausz ("Krausz"), David Liddle
("Liddle"), Jonathan D. Root ("Root") Christopher Rust
("Rust") and Philip M. Young ("Young"). The foregoing entities
and individuals are collectively referred to as the "Reporting
Persons."
PMG VIII, the general partner of USVP VIII, USVP VIII AF, USVP
EP VIII-A and USVP EP VIII-B, may be deemed to have sole power
to vote and sole power to dispose of shares of the issuer
directly owned by USVP VIII, USVP VIII AF, USVP EP VIII-A and
USVP EP VIII-B. Connors, Federman, Fu, Krausz, Liddle, Root,
Rust and Young are managing members of PMG VIII and may be
deemed to have shared power to vote and shared power to
dispose of shares of the issuer directly owned by USVP VIII,
USVP VIII AF, USVP EP VIII-A and USVP EP VIII-B.
ITEM 2(B). ADDRESS OF PRINCIPAL OFFICE
---------------------------
The address for each of the Reporting Persons is:
U.S. Venture Partners
2735 Sand Hill Road
Menlo Park, California 94025
ITEM 2(C) CITIZENSHIP
-----------
USVP VIII, USVP VIII AF, USVP EP VIII-A and USVP EP VIII-B are
Delaware limited partnerships. PMG VIII is a Delaware limited
liability company. Connors, Federman, Fu, Krausz, Liddle,
Root, Rust and Young are United States citizens.
ITEM 2(D) AND (E). TITLE OF CLASS OF SECURITIES AND CUSIP NUMBER
---------------------------------------------
Common Stock
CUSIP # 04963C209
ITEM 3. Not Applicable.
---------------
------------------------------------- --------------------------
CUSIP NO. 04963C209 13 G Page 16 of 22
------------------------------------- --------------------------
ITEM 4. OWNERSHIP
---------
Provide the following information regarding the aggregate
number and percentage of the class of securities of the issuer
identified in Item 1.
(a) Amount beneficially owned:
--------------------------
See Row 9 of cover page for each Reporting Person.
(b) Percent of Class:
-----------------
See Row 11 of cover page for each Reporting Person.
(c) Number of shares as to which such person has:
---------------------------------------------
(i) Sole power to vote or to direct the vote:
-----------------------------------------
See Row 5 of cover page for each Reporting
Person.
(ii) Shared power to vote or to direct the vote:
-------------------------------------------
See Row 6 of cover page for each Reporting
Person.
(iii) Sole power to dispose or to direct the
disposition of:
----------------------------------------------
See Row 7 of cover page for each Reporting
Person.
(iv) Shared power to dispose or to direct the
disposition of:
----------------------------------------------
See Row 8 of cover page for each Reporting
Person.
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS
--------------------------------------------
Not applicable.
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER
--------------------------------------------------------------
PERSON.
-------
Under certain circumstances set forth in the limited
partnership agreements of USVP VIII, USVP VIII AF, USVP EP
VIII-A and USVP EP VIII-B, and the limited liability company
agreement of PMG VIII, the general and limited partners or
members, as the case may be, of each of such entities may be
deemed to have the right to receive dividends from, or the
proceeds from, the sale of shares of the issuer owned by each
such entity of which they are a partner or member, as the case
may be.
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
--------------------------------------------------------------
ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
--------------------------------------------------------------
COMPANY
-------
Not applicable.
------------------------------------- --------------------------
CUSIP NO. 04963C209 13 G Page 17 of 22
------------------------------------- --------------------------
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
----------------------------------------------------------
Not applicable.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP.
-------------------------------
Not applicable.
ITEM 10. CERTIFICATION.
--------------
Not applicable.
------------------------------------- --------------------------
CUSIP NO. 04963C209 13 G Page 18 of 22
------------------------------------- --------------------------
SIGNATURES
----------
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Dated: February 10, 2006
U.S. VENTURE PARTNERS VIII, L.P. /s/ Michael Maher
By Presidio Management Group VIII, L.L.C. -----------------------------
Its General Partner Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
USVP VIII Affiliates Fund, L.P. /s/ Michael Maher
By Presidio Management Group VIII, L.L.C. -------------------------------
Its General Partner Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
USVP Entrepreneur Partners VIII-A, L.P., /s/ Michael Maher
By Presidio Management Group VIII, L.L.C. -------------------------------
Its General Partner Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
USVP Entrepreneur Partners VIII-B- L.P., /s/ Michael Maher
By Presidio Management Group VIII, L.L.C. -------------------------------
Its General Partner Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
PRESIDIO MANAGEMENT GROUP VIII, L.L.C. /s/ Michael Maher
A Delaware Limited Liability Company -------------------------------
Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
Timothy Connors /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Irwin Federman /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
------------------------------------- --------------------------
CUSIP NO. 04963C209 13 G Page 19 of 22
------------------------------------- --------------------------
Winston Fu /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Steven M. Krausz /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
David Liddle /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Jonathan D. Root /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Christopher Rust /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Philip M. Young /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
*Signed pursuant to a Power of Attorney already on file with the appropriate
agencies.
The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative other than an executive
officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement, provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.
NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See ss.240.13d-7 for other
parties for whom copies are to be sent.
Attention: Intentional misstatements or omissions of fact constitute Federal
criminal violations (See 18 U.S.C. 1001)
------------------------------------- --------------------------
CUSIP NO. 04963C209 13 G Page 20 of 22
------------------------------------- --------------------------
EXHIBIT INDEX
-------------
Found on
Sequentially
Exhibit Numbered Page
------- -------------
Exhibit A: Agreement of Joint Filing 22
------------------------------------- --------------------------
CUSIP NO. 04963C209 13 G Page 21 of 22
------------------------------------- --------------------------
EXHIBIT A
---------
Agreement of Joint Filing
-------------------------
The undersigned hereby agree that a single Schedule 13G (or any amendment
thereto) relating to the Common Stock of Atricure, Inc. shall be filed on behalf
of each of the undersigned and that this Agreement shall be filed as an exhibit
to such Schedule 13G.
Dated: February 10, 2006
U.S. VENTURE PARTNERS VIII, L.P. /s/ Michael Maher
By Presidio Management Group VIII, L.L.C. -----------------------------
Its General Partner Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
USVP VIII Affiliates Fund, L.P. /s/ Michael Maher
By Presidio Management Group VIII, L.L.C. -------------------------------
Its General Partner Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
USVP Entrepreneur Partners VIII-A, L.P., /s/ Michael Maher
By Presidio Management Group VIII, L.L.C. -------------------------------
Its General Partner Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
USVP Entrepreneur Partners VIII-B- L.P., /s/ Michael Maher
By Presidio Management Group VIII, L.L.C. -------------------------------
Its General Partner Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
PRESIDIO MANAGEMENT GROUP VIII, L.L.C. /s/ Michael Maher
A Delaware Limited Liability Company -------------------------------
Signature
Michael Maher
-------------------------------
Chief Financial Officer/
Attorney-In-Fact*
Timothy Connors /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Irwin Federman /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
------------------------------------- --------------------------
CUSIP NO. 04963C209 13 G Page 22 of 22
------------------------------------- --------------------------
Winston Fu /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Steven M. Krausz /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
David Liddle /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Jonathan D. Root /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Christopher Rust /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
Philip M. Young /s/ Michael Maher
-------------------------------
Michael Maher
Attorney-In-Fact*
*Signed pursuant to a Power of Attorney already on file with the appropriate
agencies.