



                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G


                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 3 )*

                                 Ameripath, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                          Common Stock, $.01 par value
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    03071D10
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                December 31, 1999
--------------------------------------------------------------------------------
             (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 35 Pages
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 2 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Ventures 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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 3 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Partners 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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 4 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 5 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Stamps, Woodsum & Co. III
--------------------------------------------------------------------------------
  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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 6 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Subordinated Debt Fund, 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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 7 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

        Summit Partners SD, 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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        PN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 8 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 9 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 10 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 11 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 12 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 13 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>

---------------------                                        -------------------
CUSIP NO.    03071D10                 13G                    PAGE 14 OF 35 PAGES
---------------------                                        -------------------

================================================================================
  1     NAMES OF REPORTING PERSONS
        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                1,485,776 shares
          EACH             -----------------------------------------------------
        REPORTING          7    SOLE DISPOSITIVE POWER
         PERSON
          WITH:                 0 shares
                           -----------------------------------------------------
                           8    SHARED DISPOSITIVE POWER

                                1,485,776 shares
--------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,485,776 shares
--------------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES *
        [ ]
--------------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

        6.9%
--------------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

        IN
================================================================================
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
<PAGE>
                                  Schedule 13G
                                  ------------


ITEM 1(A).        NAME OF ISSUER: Ameripath, Inc.

ITEM 1(B).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
                  7289 Garden Road, Suite 200, River Beach, FL, 33404.

ITEM 2(A).        NAMES OF PERSONS FILING: Summit Ventures III, L.P., Summit
                  Partners III, L.P., Summit Investors II, L.P., Stamps, Woodsum
                  & Co. III, Summit Subordinated Debt Fund, L.P., Summit
                  Partners SD, L.P. and Messrs. E. Roe Stamps, IV, Stephen G.
                  Woodsum, Gregory M. Avis, Martin J. Mannion, Bruce R. Evans,
                  Thomas S. Roberts, and Walter G. Kortschak.

                  Summit Partners III, L.P. is the sole general partner of
                  Summit Ventures III, L.P. Stamps, Woodsum & Co. III is the
                  sole general partner of Summit Partners III, L.P. Summit
                  Partners SD, L.P. is the sole general partner of Summit
                  Subordinated Debt Fund, L.P. Stamps, Woodsum & Co. III is the
                  sole general partner of Summit Partners SD, L.P. Messrs.
                  Stamps, Woodsum, Avis, Mannion, Evans, Roberts and Kortschak
                  are individual general partners of Stamps, Woodsum & Co. III
                  and Summit Investors II, L.P.

                  As of December 31, 1999, John A. Genest was no longer
                  affiliated with any of the "Entities" (as defined below).

ITEM 2(B).        ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:
                  The address of the principal business office of Summit
                  Ventures III, L.P., Summit Partners III, L.P., Summit
                  Investors II, L.P., Stamps, Woodsum & Co. III, Summit
                  Subordinated Debt Fund, L.P., Summit Partners SD, L.P. and
                  Messrs. Stamps, Woodsum, Mannion, Evans, and Roberts 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 III, L.P., Summit
                  Partners III, L.P., Summit Investors II, L.P., Summit
                  Subordinated Debt Fund, L.P. and Summit Partners SD, L.P. is a
                  limited partnership organized under the laws of the State of
                  Delaware. Stamps, Woodsum & Co. III is a general partnership
                  organized under the laws of the Commonwealth of Massachusetts.
                  Each of Messrs. Stamps, Woodsum, Avis, Mannion, Evans,
                  Roberts, and Kortschak is a United States citizen.

ITEM 2(D).        TITLE OF CLASS OF SECURITIES:  Common Stock, $.01 par value.


                               Page 15 of 35 Pages
<PAGE>

ITEM 2(E).        CUSIP NUMBER:  03071D10

ITEM 3.           IF THIS STATEMENT IS FILED PURSUANT TO RULES 13D-1(B), OR
                  13D-2(B), CHECK WHETHER THE PERSON FILING IS A:
                  Not Applicable.

ITEM 4.           OWNERSHIP.

                  (a)   Amount Beneficially Owned:

                        Each of Summit Ventures III, L.P., Summit Partners III,
                        L.P., Stamps, Woodsum & Co. III, Summit Investors II,
                        L.P., Summit Subordinated Debt Fund, L.P. and Summit
                        Partners SD, L.P. (individually an "Entity" and
                        collectively the "Entities") may be deemed to own
                        beneficially 1,485,776 shares of Common Stock as of
                        December 31, 1999. Each of Messrs. Stamps, Woodsum,
                        Avis, Mannion, Evans, Roberts and Kortschak may be
                        deemed to own beneficially 1,485,776 shares of Common
                        Stock as of December 31, 1999.

                        As of December 31, 1999, Summit Ventures III, L.P. was
                        the record holder of 1,043,790 shares of Common Stock.
                        As of December 31, 1999, Summit Investors II, L.P. was
                        the record holder of 9,919 shares of Common Stock. As of
                        December 31, 1999, Summit Subordinated Debt Fund, L.P.
                        was the record holder of 432,067 shares of Common Stock.
                        The shares held of record by Summit Ventures III, L.P.
                        Summit Investors II, L.P. and Summit Subordinated Debt
                        Fund, 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
                        1,485,776 shares of Common Stock. In their capacities as
                        individual general partners of Stamps, Woodsum & Co. III
                        and Summit Investors II, L.P., each of Messrs. Stamps,
                        Woodsum, Avis, Mannion, Evans, Roberts, and Kortschak
                        may be deemed to own beneficially 1,485,776 shares of
                        Common Stock.

                        Each of the reporting persons expressly disclaims
                        beneficial ownership of any shares of Common Stock of
                        Ameripath, Inc., except in the case of Summit Ventures
                        III, L.P., for the 1,043,790 shares which it holds or
                        record, in the case of Summit Subordinated Debt Fund,
                        L.P., for the 432,067 shares which it holds of record,
                        and in the case of Summit Investors II, L.P., for the
                        9,919 shares which it holds of record.


                               Page 16 of 35 Pages
<PAGE>

                  (b)   Percent of Class:

                        Summit Ventures III, L.P.: 6.9%
                        Summit Partners III, L.P.: 6.9%
                        Stamps, Woodsum & Co. III: 6.9%
                        Summit Subordinated Debt Fund, L.P.:  6.9%
                        Summit Partners SD, L.P.:  6.9%
                        Summit Investors II, L.P.: 6.9%
                        E. Roe Stamps, IV: 6.9%
                        Stephen G. Woodsum: 6.9%
                        Martin J. Mannion: 6.9%
                        Gregory M. Avis: 6.9%
                        Bruce R. Evans: 6.9%
                        Walter G. Kortschak: 6.9%
                        Thomas S. Roberts: 6.9%

      The foregoing percentages are calculated based on the 21,580,687 shares of
      Common Stock reported to be outstanding on Ameripath, Inc.'s Form 10-Q for
      the quarter ended September 30, 1999.

                  (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 III, L.P.: 1,485,776 shares
                               Summit Partners III, L.P.: 1,485,776 shares
                               Stamps, Woodsum & Co. III: 1,485,776 shares
                               Summit Investors II, L.P.: 1,485,776 shares
                               Summit Subordinated Debt Fund, L.P.:
                                 1,485,776 shares
                               Summit Partners SD, L.P.: 1,485,776 shares
                               E. Roe Stamps, IV: 1,485,776 shares
                               Stephen G. Woodsum: 1,485,776 shares
                               Martin J. Mannion: 1,485,776 shares
                               Gregory M. Avis: 1,485,776 shares
                               Bruce R. Evans: 1,485,776 shares
                               Walter G. Kortschak: 1,485,776 shares
                               Thomas S. Roberts: 1,485,776 shares


                               Page 17 of 35 Pages
<PAGE>

                        (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 III, L.P.: 1,485,776 shares
                               Summit Partners III, L.P.: 1,485,776 shares
                               Stamps, Woodsum & Co. III: 1,485,776 shares
                               Summit Investors II, L.P.: 1,485,776 shares
                               Summit Subordinated Debt Fund, L.P.:
                                   1,485,776 shares
                               Summit Partners SD, L.P.: 1,485,776 shares
                               E. Roe Stamps, IV: 1,485,776 shares
                               Stephen G. Woodsum: 1,485,776 shares
                               Martin J. Mannion: 1,485,776 shares
                               Gregory M. Avis: 1,485,776 shares
                               Bruce R. Evans: 1,485,776 shares
                               Walter G. Kortschak: 1,485,776 shares
                               Thomas S. Roberts: 1,485,776 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)(1)(ii)(J).

ITEM 9.           NOTICE OF DISSOLUTION OF GROUP.
                  Not Applicable.

ITEM 10.          CERTIFICATION.


                               Page 18 of 35 Pages
<PAGE>

                  Not Applicable. This statement on Schedule 13G is not filed
                  pursuant to Rule 13d-1(b).
































                               Page 19 of 35 Pages
<PAGE>

                                   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, 2000.

SUMMIT VENTURES III, L.P.                 SUMMIT SUBORDINATED DEBT FUND, L.P.

By: Summit Partners III, L.P.             By: Summit Partners SD, L.P.

By: Stamps, Woodsum & Co. III             By: Stamps, Woodsum & Co. III


    By:        *                          By:         *
       --------------------                  --------------------
       E. Roe Stamps, IV                     E. Roe Stamps, IV
       General Partner                       General Partner


SUMMIT INVESTORS II, L.P.                 SUMMIT PARTNERS SD, L.P.

By:            *                          By: Stamps, Woodsum & Co. III
    -----------------------
    General Partner                       By:         *
                                             -----------------------
                                             E. Roe Stamps, IV
SUMMIT PARTNERS III, L.P.                    General Partner

By: Stamps, Woodsum & Co. III             STAMPS, WOODSUM & CO. III

    By:        *                          By:          *
       --------------------                  -----------------------
       E. Roe Stamps, IV                     E. Roe Stamps, IV
       General Partner                       General Partner





                                  Page 20 of 35
<PAGE>

                                                        *
                                             -----------------------
                                             Walter G. Kortschak

                                                        *
                                             -----------------------
                                             E. Roe Stamps, IV

                                                        *
                                             -----------------------
                                             Stephen G. Woodsum

                                                        *
                                             -----------------------
                                             Gregory M. Avis

                                                        *
                                             -----------------------
                                             Martin J. Mannion

                                                        *
                                             -----------------------
                                             Bruce R. Evans

                                                        *
                                             -----------------------
                                             Thomas S. Roberts


                                             *By: /s/ Thomas F. Farb
                                                  ------------------
                                                  Thomas F. Farb
                                                  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 35 Pages
