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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. )*
American Dental Partners, Inc.
(Name of Issuer)
Common Stock, par value $.01
(Title of Class of Securities)
025353103
(CUSIP Number)
December 31, 1998
(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
<PAGE> 2
CUSIP NO. 025353103 13G PAGE 2 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 2 of 32 Pages
<PAGE> 3
CUSIP NO. 025353103 13G PAGE 3 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 3 of 32 Pages
<PAGE> 4
CUSIP NO. 025353103 13G PAGE 4 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Summit Investors II, 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 4 of 32 Pages
<PAGE> 5
CUSIP NO. 025353103 13G PAGE 5 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
PN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 5 of 32 Pages
<PAGE> 6
CUSIP NO. 025353103 13G PAGE 6 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 6 of 32 Pages
<PAGE> 7
CUSIP NO. 025353103 13G PAGE 7 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 7 of 32 Pages
<PAGE> 8
CUSIP NO. 025353103 13G PAGE 8 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 8 of 32 Pages
<PAGE> 9
CUSIP NO. 025353103 13G PAGE 9 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
John A. Genest
- --------------------------------------------------------------------------------
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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 9 of 32 Pages
<PAGE> 10
CUSIP NO. 025353103 13G PAGE 10 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 10 of 32 Pages
<PAGE> 11
CUSIP NO. 025353103 13G PAGE 11 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 11 of 32 Pages
<PAGE> 12
CUSIP NO. 025353103 13G PAGE 12 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 12 of 32 Pages
<PAGE> 13
CUSIP NO. 025353103 13G PAGE 13 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,376,162 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,376,162 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,376,162 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
31.95%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 13 of 32 Pages
<PAGE> 14
CUSIP NO. 025353103 13G PAGE 14 OF 32 PAGES
- --------------------------------------------------------------------------------
1 NAME 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 2,285,869 shares
EACH
REPORTING ------------------------------------------------------
PERSON 7 SOLE DISPOSITIVE POWER
WITH
0 shares
------------------------------------------------------
8 SHARED DISPOSITIVE POWER
2,285,869 shares
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,286,869 shares
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
30.74%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON *
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 14 of 32 Pages
<PAGE> 15
Schedule 13G
Item 1(a). Name of Issuer: American Dental Partners, Inc.
Item 1(b). Address of Issuer's Principal Executive Offices: 301 Edgewater Place,
Suite 320, Wakefield, MA 01880.
Item 2(a). Names of Persons Filing: Summit Ventures IV, L.P., Summit Partners
IV, L.P., Summit Investors II, L.P., Stamps, Woodsum & Co. IV and
Messrs. E. Roe Stamps, IV, Stephen G. Woodsum, Gregory M. Avis, John
A. Genest, Martin J. Mannion, Bruce R. Evans, Thomas S. Roberts,
Walter G. Kortschak and Joseph F. Trustey.
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,
Genest, Mannion, Evans, Roberts, and Kortschak, are individual
general partners of Stamps, Woodsum & Co. IV and Summit Investors II,
L.P. Mr. Trustey is an individual general partner of Stamps, Woodsum
& Co. IV.
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 II, L.P., Stamps, Woodsum
& Co. IV and Messrs. Stamps, Woodsum, Mannion, Genest, Evans, Roberts
and Trustey is Summit Partners, 600 Atlantic Avenue, Boston,
Massachusetts 02210. The address of the principal business office of
Messrs. Avis and Kortschak 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 II, 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,
Genest, Evans, Roberts, Kortschak and Trustey is a United States
citizen.
Item 2(d). Title of Class of Securities: Common Stock, par value $.01
Item 2(e). CUSIP Number: 025353103
Item 3. If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b),
check whether the person filing is a:
Page 15 of 32 Pages
<PAGE> 16
Not Applicable.
Item 4. Ownership.
(a) Amount Beneficially Owned:
Each of Summit Ventures IV, L.P., Summit Partners IV,
L.P., Stamps, Woodsum & Co. IV, and Summit Investors II,
L.P. (individually an "Entity" and collectively the
"Entities") may be deemed to own beneficially 2,376,162
shares of Common Stock as of December 31, 1998. Each of
Messrs. Stamps, Woodsum, Avis, Mannion, Genest, Evans,
Roberts, and Kortschak may be deemed to own beneficially
2,376,162 shares of Common Stock as of December 31,
1998. Mr. Trustey may be deemed to own beneficially
2,285,869 shares of Common Stock as of December 31,
1998.
As of December 31, 1998, Summit Ventures IV, L.P. was
the record holder of 2,285,869 shares of Common Stock.
As of December 31, 1998 Summit Investors II, L.P. was
the record holder of 90,293 shares of Common Stock. The
shares held of record by Summit Ventures IV, L.P. and
Summit Investors II, L.P. are referred to herein
collectively as the "Record Shares." By virtue of the
affiliate relationships among the Entities, each Entity
may be deemed to own beneficially all of the Record
Shares. Hence, each Entity may be deemed to own
beneficially 2,376,162 shares of Common Stock. In their
capacities as individual general partners of Stamps,
Woodsum & Co. IV and Summit Investors II, L.P. each of
Messrs. Stamps, Woodsum, Avis, Mannion, Genest, Evans,
Roberts, and Kortschak may be deemed to own beneficially
2,376,162 shares of Common Stock. Mr. Trustey may be
deemed to own beneficially 2,285,869 shares of Common
Stock.
Each of the reporting persons expressly disclaims
beneficial ownership of any shares of Common Stock of
American Dental Partners, Inc. except in the case of
Summit Ventures IV, L.P., for the 2,285,869 shares which
it holds of record, and in the case of Summit Investors
II, L.P., for the 90,293 shares which it holds of
record.
(b) Percent of Class:
Summit Ventures IV, L.P.: 31.95%
Summit Partners IV, L.P.: 31.95%
Stamps, Woodsum & Co. IV: 31.95%
Summit Investors II, L.P.: 31.95%
E. Roe Stamps, IV: 31.95%
Stephen G. Woodsum: 31.95%
Page 16 of 32 Pages
<PAGE> 17
Martin J. Mannion: 31.95%
John A. Genest: 31.95%
Gregory M. Avis: 31.95%
Bruce R. Evans: 31.95%
Walter G. Kortschak: 31.95%
Thomas S. Roberts: 31.95%
Joseph F. Trustey: 30.74%
The foregoing percentages are calculated based on the
7,436,066 shares of Common Stock reported to be
outstanding in a Form 10-Q for the quarterly period
ended September 30, 1998.
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote:
0 shares for each reporting person
(ii) shared power to vote or to direct the vote:
Summit Ventures IV, L.P.: 2,376,162 shares
Summit Partners IV, L.P.: 2,376,162 shares
Stamps, Woodsum & Co. IV: 2,376,162 shares
Summit Investors II, L.P.: 2,376,162 shares
E. Roe Stamps, IV: 2,376,162 shares
Stephen G. Woodsum: 2,376,162 shares
Martin J. Mannion: 2,376,162 shares
John A. Genest: 2,376,162 shares
Gregory M. Avis: 2,376,162 shares
Bruce R. Evans: 2,376,162 shares
Walter G. Kortschak: 2,376,162 shares
Thomas S. Roberts: 2,376,162 shares
Joseph F. Trustey: 2,285,869 shares
(iii) sole power to dispose or direct the disposition
of:
0 shares for each reporting person
(iv) shared power to dispose or direct the disposition
of:
Summit Ventures IV, L.P.: 2,376,162 shares
Summit Partners IV, L.P.: 2,376,162 shares
Stamps, Woodsum & Co. IV: 2,376,162 shares
Summit Investors II, L.P.: 2,376,162 shares
E. Roe Stamps, IV: 2,376,162 shares
Page 17 of 32 Pages
<PAGE> 18
Stephen G. Woodsum: 2,376,162 shares
Martin J. Mannion: 2,376,162 shares
John A. Genest: 2,376,162 shares
Gregory M. Avis: 2,376,162 shares
Bruce R. Evans: 2,376,162 shares
Walter G. Kortschak: 2,376,162 shares
Thomas S. Roberts: 2,376,162 shares
Joseph F. Trustey: 2,285,869 shares
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.
Not Applicable.
Item 7. Identification and Classification of the Subsidiary which Acquired
the Security Being Reported on By the Parent Holding Company.
Not Applicable.
Item 8. Identification and Classification of Members of the Group.
Not Applicable. The reporting persons expressly disclaim membership
in a "group" as defined in Rule 13d-1(b)(ii)(H).
Item 9. Notice of Dissolution of Group.
Not Applicable.
Item 10. Certification.
Not Applicable. This statement on Schedule 13G is not filed pursuant
to Rule 13d-1(b).
Page 18 of 32 Pages
<PAGE> 19
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 11, 1999
SUMMIT VENTURES IV, L.P. *
-----------------------------
E. Roe Stamps, IV
By: Summit Partners IV, L.P.
By: Stamps, Woodsum & Co. IV *
-----------------------------
Stephen G. Woodsum
By: *
---------------------------------
E. Roe Stamps, IV *
General Partner -----------------------------
Gregory M. Avis
SUMMIT INVESTORS II, L.P.
*
-----------------------------
Martin J. Mannion
By: /s/ John A. Genest
-------------------------------
General Partner /s/ John A. Genest
-----------------------------
John A. Genest
SUMMIT PARTNERS IV, L.P.
*
-----------------------------
Bruce R. Evans
By: Stamps, Woodsum & Co. IV
*
-----------------------------
Walter G. Kortschak
By: *
---------------------------------
E. Roe Stamps
General Partner *
-----------------------------
Thomas S. Roberts
STAMPS, WOODSUM & CO. IV
*
-----------------------------
Joseph F. Trustey
By: *
------------------------------
E. Roe Stamps
General Partner
Page 19 of 32 Pages
<PAGE> 20
*By: /s/ John A. Genest
---------------------------
John A. Genest,
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 20 of 32 Pages
<PAGE> 1
Exhibit 1
AGREEMENT
Pursuant to Rule 13d-1(f)(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 American Dental Partners, Inc.
This agreement may be executed in any number of counterparts, each of
which shall be deemed an original.
EXECUTED this 10th day of February, 1999.
SUMMIT VENTURES IV, L.P. *
-------------------------------
E. Roe Stamps, IV
By: Summit Partners IV, L.P.
By: Stamps, Woodsum & Co. IV *
-------------------------------
Stephen G. Woodsum
By: *
--------------------------
E. Roe Stamps, IV *
General Partner -------------------------------
Gregory M. Avis
SUMMIT INVESTORS II, L.P.
*
-------------------------------
Martin J. Mannion
By: /s/ John A. Genest
------------------------------
General Partner /s/ John A. Genest
-------------------------------
SUMMIT PARTNERS IV, L.P. John A. Genest
By: Stamps, Woodsum & Co. IV
*
-------------------------------
Bruce R. Evans
By: *
-------------------------
E. Roe Stamps, IV
General Partner *
-------------------------------
Walter G. Kortschak
STAMPS, WOODSUM & CO. IV
By: *
------------------------
E. Roe Stamps, IV
General Partner
Page 21 of 32 Pages
<PAGE> 2
*
-------------------------------
Thomas S. Roberts
*
-------------------------------
Joseph F. Trustey
*By: /s/ John A. Genest
-------------------------------
John A. Genest,
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 22 of 32 Pages
<PAGE> 1
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 and John A. Genest 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., 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., Stamps, Woodsum International &
Co., Summit Investors, L.P., Summit Investors II, L.P., Summit Investors II,
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., SW
Management Corp., Summit Management Co., Summit Subordinated Debt Fund II, L.P.,
and Summit Partners SD II, LLC, 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 23 of 32 Pages
<PAGE> 2
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the
10th day of February, 1997.
/s/ E. Roe Stamps, IV
----------------------------------------
E. Roe Stamps, IV
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, 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. Freidman
----------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 24 of 32 Pages
<PAGE> 3
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th
day of February, 1997.
/s/ Stephen G. Woodsum
----------------------------------------
Stephen G. Woodsum
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, 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. Freidman
----------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 25 of 32 Pages
<PAGE> 4
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th
day of February, 1997.
/s/ Martin J. Mannion
----------------------------------------
Martin J. Mannion
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, 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. Freidman
----------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 26 of 32 Pages
<PAGE> 5
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th
day of February, 1997.
/s/ John A. Genest
----------------------------------------
John A. Genest
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, before me personally came John A.
Genest, 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. Freidman
----------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 27 of 32 Pages
<PAGE> 6
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th
day of February, 1997.
/s/ Gregory M. Avis
----------------------------------------
Gregory M. Avis
State of California )
) ss:
County of Santa Clara )
On this 3rd day of February, 1997, 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/ Katherine C. Ely
----------------------------------------
Notary Public
My Commission expires: May 28, 2000
Page 28 of 32 Pages
<PAGE> 7
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th
day of February, 1997.
/s/ Thomas S. Roberts
----------------------------------------
Thomas S. Roberts
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, 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. Freidman
----------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 29 of 32 Pages
<PAGE> 8
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th
day of February, 1997.
/s/ Bruce R. Evans
----------------------------------------
Bruce R. Evans
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, 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. Freidman
----------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 30 of 32 Pages
<PAGE> 9
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th
day of February, 1997.
/s/ Walter G. Kortschak
----------------------------------------
Walter G. Kortschak
State of California )
) ss:
County of Santa Clara )
On this 3rd day of February, 1997, 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/ Katherine C. Ely
----------------------------------------
Notary Public
My Commission expires: May 28, 2000
Page 31 of 32 Pages
<PAGE> 10
IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th
day of February, 1997.
/s/ Joseph F. Trustey
----------------------------------------
Joseph F. Trustey
Commonwealth of Massachusetts )
) ss:
County of Suffolk )
On this 10th day of February, 1997, 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. Freidman
----------------------------------------
Notary Public
My Commission expires: October 20, 2000
Page 32 of 32 Pages
