-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, CKAgQk9dg2BwTLJqLhym8ljL+eyFz4ZGVN0fvWegmObhMxH+gSaL20PY+sLPi1ZS 60obcJP5IuyMNc0Ze9ZWwQ== 0001072613-04-000319.txt : 20040217 0001072613-04-000319.hdr.sgml : 20040216 20040217145054 ACCESSION NUMBER: 0001072613-04-000319 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20040217 GROUP MEMBERS: BRUCE R. EVANS GROUP MEMBERS: E. ROE STAMPS, IV GROUP MEMBERS: GREGORY M. AVIS GROUP MEMBERS: JOSEPH F. TRUSTEY GROUP MEMBERS: KEVIN P. MOHAN GROUP MEMBERS: MARTIN J. MANNION GROUP MEMBERS: PETER Y. CHUNG GROUP MEMBERS: STAMPS, WOODSUM & CO. IV GROUP MEMBERS: STEPHEN G. WOODSUM GROUP MEMBERS: SUMMIT INVESTORS III, L.P. GROUP MEMBERS: SUMMIT PARTNERS IV, L.P. GROUP MEMBERS: THOMAS S. ROBERTS GROUP MEMBERS: WALTER G. KORTSCHAK SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: IMPAC MEDICAL SYSTEMS INC CENTRAL INDEX KEY: 0001026448 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-PREPACKAGED SOFTWARE [7372] IRS NUMBER: 943109238 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-78691 FILM NUMBER: 04607581 BUSINESS ADDRESS: STREET 1: 100 W EVELYN AVE CITY: MOUNTAIN VIEW STATE: CA ZIP: 94041 BUSINESS PHONE: 6506238800 MAIL ADDRESS: STREET 1: 100 W EVELYN AVE CITY: MOUNTAIN VIEW STATE: CA ZIP: 94041 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: SUMMIT VENTURES IV LP CENTRAL INDEX KEY: 0000948001 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: C/O SUMMIT PARTNERS STREET 2: 222 BERKELEY STREET, 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 6178241032 MAIL ADDRESS: STREET 1: C/O SUMMIT PARTNERS STREET 2: 222 BERKELEY STREET, 18TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 SC 13G/A 1 sch13g_12492b.txt SCHEDULE 13G/A (#1) - IMPAC MEDICAL SYSTEMS ================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. 1 )* IMPAC Medical Systems, Inc. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, par value $.001 - -------------------------------------------------------------------------------- (Title of Class of Securities) 45255A104 - -------------------------------------------------------------------------------- (CUSIP Number) December 31, 2003 - -------------------------------------------------------------------------------- (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 the disclosures provided in a prior cover page. The information required in 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). ================================================================================ Page 1 of 32 Pages =================== ============= CUSIP NO. 45255A104 13G PAGE 2 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Summit Ventures IV, L.P. - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware limited partnership - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* PN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 2 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 3 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Summit Partners IV, L.P. - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware limited partnership - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* PN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 3 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 4 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Summit Investors III, L.P. - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware limited partnership - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* PN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 4 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 5 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Stamps, Woodsum & Co. IV - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts general partnership - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* PN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 5 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 6 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) E. Roe Stamps, IV - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 6 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 7 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Stephen G. Woodsum - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 7 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 8 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Gregory M. Avis - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 8 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 9 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Martin J. Mannion - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 9 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 10 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Bruce R. Evans - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 10 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 11 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Thomas S. Roberts - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 11 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 12 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Walter G. Kortschak - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 12 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 13 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Joseph F. Trustey - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 13 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 14 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Kevin P. Mohan - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 14 of 32 pages =================== ============= CUSIP NO. 45255A104 13G PAGE 15 OF 32 =================== ============= ================================================================================ 1 NAMES OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Peter Y. Chung - ------- ------------------------------------------------------------------------ 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [_] (b) [_] - ------- ------------------------------------------------------------------------ 3 SEC USE ONLY - ------- ------------------------------------------------------------------------ 4 CITIZENSHIP OR PLACE OF ORGANIZATION United States - ------- ------------------------------------------------------------------------ 5 SOLE VOTING POWER 0 shares NUMBER OF ------- ----------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares EACH ------- ----------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 0 shares ------- ----------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 shares - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [_] - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0% - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON* IN ================================================================================ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 15 of 32 pages Schedule 13G ------------ Item 1(a). Name of Issuer: IMPAC Medical Systems, Inc. -------------- Item 1(b). Address of Issuer's Principal Executive Offices: ----------------------------------------------- 100 West Evelyn Avenue, Mountain View, CA 94041. Item 2(a). Names of Persons Filing: ----------------------- Summit Ventures IV, L.P., Summit Partners IV, L.P., Summit Investors III, L.P., Stamps, Woodsum & Co. IV and Messrs. E. Roe Stamps, IV, Stephen G. Woodsum, Gregory M. Avis, Martin J. Mannion, Bruce R. Evans, Thomas S. Roberts, Walter G. Kortschak, Joseph F. Trustey, Kevin P. Mohan and Peter Y. Chung. Summit Partners IV, L.P. is the sole general partner of Summit Ventures IV, L.P. Stamps, Woodsum & Co. IV is the sole general partner of Summit Partners IV, L.P. Messrs. Stamps, Woodsum, Avis, Mannion, Evans, Roberts, Kortschak, Trustey, Mohan and Chung are individual general partners of Stamps, Woodsum & Co. IV. Messrs. Stamps, Woodsum, Avis, Mannion, Evans, Roberts, Kortschak and Trustey are individual general partners of Summit Investors III, L.P. Item 2(b). Address of Principal Business Office or, if None, Residence: ----------------------------------------------------------- The address of the principal business office of Summit Ventures IV, L.P., Summit Partners IV, L.P., Summit Investors III, L.P., Stamps, Woodsum & Co. IV and Messrs. Stamps, Woodsum, Mannion, Evans, Roberts, Trustey and Mohan is Summit Partners, 222 Berkeley Street, 18th Floor, Boston, Massachusetts 02116. The address of the principal business office of Messrs. Avis, Kortschak and Chung is Summit Partners, 499 Hamilton Avenue, Palo Alto, California 94301. Item 2(c). Citizenship: ----------- Each of Summit Ventures IV, L.P., Summit Partners IV, L.P. and Summit Investors III, L.P. is a limited partnership organized under the laws of the State of Delaware. Stamps, Woodsum & Co. IV is a general partnership organized under the laws of the Commonwealth of Massachusetts. Each of Messrs. Stamps, Woodsum, Avis, Mannion, Evans, Roberts, Kortschak, Trustey, Mohan and Chung is a United States citizen. Item 2(d). Title of Class of Securities: Common Stock, par value $.001 ---------------------------- Item 2(e). CUSIP Number: 45255A104 ------------ Page 16 of 32 pages Item 3. If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) ------------------------------------------------------------------ or (c), check whether the person filing is a: -------------------------------------------- Not Applicable. Item 4. Ownership. --------- Not Applicable Item 5. Ownership of Five Percent or Less of a Class. -------------------------------------------- Each Reporting Person has ceased to own beneficially more than 5% of the outstanding Common Stock of IMPAC Medical Systems, Inc. ALL OTHER ITEMS REPORTED ON SCHEDULE 13G FILED ON FEBRUARY 13, 2003 ON BEHALF OF THE REPORTING PERSONS WITH RESPECT TO THE COMMON STOCK OF IMPAC MEDICAL SYSTEMS, INC. REMAIN UNCHANGED. Page 17 of 32 pages SIGNATURES ---------- After reasonable inquiry and to the best of our knowledge and belief, we certify that the information set forth in this statement is true, complete and correct. We also hereby agree to file this statement jointly pursuant to the Agreement listed on Exhibit 1 hereto. Dated: February 13, 2004. SUMMIT VENTURES IV, L.P. * ----------------------------- By: Summit Partners IV, L.P. E. Roe Stamps, IV By: Stamps, Woodsum & Co. IV * ----------------------------- By: * Stephen G. Woodsum --------------------------------- E. Roe Stamps, IV General Partner * ----------------------------- Gregory M. Avis SUMMIT INVESTORS III, L.P. By: * * ------------------------------------ ----------------------------- General Partner Martin J. Mannion SUMMIT PARTNERS IV, L.P. * ----------------------------- By: Stamps, Woodsum & Co. IV Bruce R. Evans By: * --------------------------------- * E. Roe Stamps, IV ----------------------------- General Partner Walter G. Kortschak STAMPS, WOODSUM & CO. IV * ----------------------------- By: * Thomas S. Roberts ------------------------------------ E. Roe Stamps, IV General Partner * ----------------------------- Joseph F. Trustey Page 18 of 32 pages * ----------------------------- Kevin P. Mohan * ----------------------------- Peter Y. Chung *By: /s/ Stephen G. Woodsum ------------------------ Stephen G. Woodsum Attorney-in-Fact - -------------------------------------------------------------------------------- * Pursuant to Powers of Attorney on file with the Commission, which Powers of Attorney are incorporated herein by reference. Copies of such Powers of Attorney are attached hereto as Exhibit 2. Page 19 of 32 pages EXHIBIT 1 --------- AGREEMENT --------- Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of shares of Common Stock of IMPAC Medical Systems, Inc. This agreement may be executed in any number of counterparts, each of which shall be deemed an original. EXECUTED this 13th day of February, 2004. SUMMIT VENTURES IV, L.P. * ----------------------------- By: Summit Partners IV, L.P. E. Roe Stamps, IV By: Stamps, Woodsum & Co. IV * ----------------------------- By: * Stephen G. Woodsum --------------------------------- E. Roe Stamps, IV General Partner * ----------------------------- Gregory M. Avis SUMMIT INVESTORS III, L.P. By: * * ------------------------------------ ----------------------------- General Partner Martin J. Mannion SUMMIT PARTNERS IV, L.P. * ----------------------------- By: Stamps, Woodsum & Co. IV Bruce R. Evans By: * --------------------------------- * E. Roe Stamps, IV ----------------------------- General Partner Walter G. Kortschak STAMPS, WOODSUM & CO. IV * ----------------------------- By: * Thomas S. Roberts ------------------------------------ E. Roe Stamps, IV General Partner * ----------------------------- Joseph F. Trustey Page 20 of 32 pages * ----------------------------- Kevin P. Mohan * ----------------------------- Peter Y. Chung *By: /s/ Stephen G. Woodsum ------------------------ Stephen G. Woodsum Attorney-in-Fact - -------------------------------------------------------------------------------- * Pursuant to Powers of Attorney on file with the Commission, which Powers of Attorney are incorporated herein by reference. Copies of such Powers of Attorney are attached hereto as Exhibit 2. Page 21 of 32 pages EXHIBIT 2 --------- POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints each and any of E. Roe Stamps, IV, Stephen G. Woodsum, Gregory M. Avis, Walter G. Kortschak and Thomas F. Farb his true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities (until revoked in writing) to sign any and all instruments, certificates and documents required to be executed on behalf of himself individually or on behalf of each or any of Summit Ventures, L.P., SP (1984), L.P. (f/k/a Summit Partners, L.P.), Stamps, Woodsum & Co., Summit Partners' Holdings, L.P., Summit Ventures II, L.P., Summit Partners II, L.P., Stamps, Woodsum & Co. II, SV Eurofund C.V., SV International, L.P., Summit Investors, L.P., Summit Investors II, L.P., Summit Investors III, L.P., Summit Ventures III, L.P., Summit Partners III, L.P., Stamps, Woodsum & Co. III, Summit Ventures IV, L.P., Summit Partners IV, L.P., Stamps, Woodsum & Co., IV, Summit Subordinated Debt Fund, L.P., Summit Partners SD, L.P., Summit E-Tek Holdings, LLC, SW Management Corp., Summit Partners, L.P., Summit Master Company, LLC, Summit Subordinated Debt Fund II, L.P., Summit Partners SD II, LLC, Summit Ventures V, L.P., Summit Partners V, L.P., Summit Partners, LLC, Summit V Advisors Fund, L.P., Summit V Advisors Fund (QP), L.P. and Summit V Companion Fund, L.P., pursuant to sections 13 and 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and any and all regulations promulgated thereunder, and to file the same, with all exhibits thereto, and any other documents in connection therewith, with the Securities and Exchange Commission, and with any other entity when and if such is mandated by the Exchange Act or by the By-laws of the National Association of Securities Dealers, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary fully to all intents and purposes as she might or could do in person thereby ratifying and confirming all that said attorney-in-fact and agent, or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof. Page 22 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th day of February, 2000. /s/ E. Roe Stamps, IV --------------------------------------- E. Roe Stamps, IV Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 7th day of February, 2000, before me personally came E. Roe Stamps, IV, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 23 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th day of February, 2000. /s/ Stephen G. Woodsum --------------------------------------- Stephen G. Woodsum Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 7th day of February, 2000, before me personally came Stephen G. Woodsum, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 24 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th day of February, 2000. /s/ Martin J. Mannion --------------------------------------- Martin J. Mannion Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 7th day of February, 2000, before me personally came Martin J. Mannion, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 25 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 8th day of February, 2000. /s/ Gregory M. Avis --------------------------------------- Gregory M. Avis State of California ) ) ss: County of Santa Clara ) On this 8th day of February, 2000, before me personally came Gregory M. Avis, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 26 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th day of February, 2000. /s/ Thomas S. Roberts --------------------------------------- Thomas S. Roberts Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 7th day of February, 2000, before me personally came Thomas S. Roberts, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 27 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th day of February, 2000. /s/ Bruce R. Evans --------------------------------------- Bruce R. Evans Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 7th day of February, 2000, before me personally came Bruce R. Evans, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 28 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of 8th day of February, 2000. /s/ Walter G. Kortschak --------------------------------------- Walter G. Kortschak State of California ) ) ss: County of Santa Clara ) On this 8th day of February, 2000, before me personally came Walter G. Kortschak, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 29 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 7th day of February, 2000. /s/ Joseph F. Trustey --------------------------------------- Joseph F. Trustey Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 7th day of February, 2000, before me personally came Joseph F. Trustey, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 30 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of 7th day of February, 2000. /s/ Kevin P. Mohan --------------------------------------- Kevin P. Mohan Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 7th day of February, 2000, before me personally came Kevin P. Mohan, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 31 of 32 pages IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 8th day of February, 2000. /s/ Peter Y. Chung --------------------------------------- Peter Y. Chung Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 8th day of February, 2000, before me personally came Peter Y. Chung, known to me to be the person described and who executed the foregoing instrument that he acknowledged that he executed the same. [Notary Seal] /s/ Cynthia R. Freedman --------------------------------------- Notary Public My Commission expires: October 20, 2000 ---------------- Page 32 of 32 pages -----END PRIVACY-ENHANCED MESSAGE-----