UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 (AMENDMENT NO. __1__)* Pediatrix Medical Group, Inc. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, $.01 par value - -------------------------------------------------------------------------------- (Title of Class of Securities) 705324101 ----------------------------------- (CUSIP Number) *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 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 2 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * PN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 2 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 3 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * PN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 3 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 4 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * PN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 4 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 5 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * PN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 5 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 6 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 2,000 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 2,000 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,000 shares - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ] - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 Less than 5% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 6 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 7 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 7 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 8 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 8 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 9 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 9 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 10 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 10 of 31 - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 11 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Ernest K. Jacquet - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 11 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 12 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 2,000 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 2,000 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 8 SHARED DISPOSITIVE POWER 0 shares - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,000 shares - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ] - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 Less than 5% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 13 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 14 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 14 of 31 Pages - -------------------------------------------------------------------------------- CUSSIP NO. 705324101 13G Page 15 of 31 Pages ----------- ----- ------ - -------------------------------------------------------------------------------- - ------- ------------------------------------------------------------------------ 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 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 NUMBER OF 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 0 shares ----- ------------------------------------------------ ----- ------------------------------------------------ WITH 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 0.0% - ------- ------------------------------------------------------------------------ - ------- ------------------------------------------------------------------------ 12 TYPE OF REPORTING PERSON * IN - ------- ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! Page 15 of 31 Pages Schedule 13G Item 1(a). Name of Issuer: Pediatrix Medical Group, Inc. Item 1(b). Address of Issuer's Principal Executive Offices: 1455 Northpark Drive, Ft. Lauderdale, FL 33326 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 and Messrs. E. Roe Stamps, IV, Stephen G. Woodsum, Gregory M. Avis, John A. Genest, Martin J. Mannion, Ernest K. Jacquet, 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. Messrs. Stamps, Woodsum, Avis, Genest, Mannion, Jacquet, Evans, Roberts and Kortschak are individual general partners of Stamps, Woodsum & Co. III and Summit Investors II, L.P. 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 and Messrs. Stamps, Woodsum, Mannion, Genest, Jacquet, 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. and Summit Investors II, 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, Genest, Jacquet, Evans, Roberts and Kortschak is a United States citizen. Item 2(d). Title of Class of Securities: Common Stock, $.01 par value per share. Item 2(e). CUSIP Number:705324101 Item 3. If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b), check whether the person filing is a: (a) [ ] Broker or Dealer registered under Section 15 of the Securities Exchange Act of 1934 (the "Act"). (b) [ ] Bank as defined in Section 3(a)(6) of the Act. (c) [ ] Insurance Company as defined in Section 3(a)(19) of the Act. (d) [ ] Investment Company registered under Section 8 of the Investment Company Act of 1940. (e) [ ] Investment Adviser registered under Section 203 of the Investment Advisers Act of 1940. (f) [ ] Employee Benefit Plan, Pension Fund which is subject to the provisions of the Employee Retirement Income Security Act of 1974 or Endowment Fund; see Rule 13d-1(b)(1)(ii)(F) of the Act. (g) [ ] Parent Holding Company, in accordance with Rule 13d-1(b)(ii)(G) of the Act. (h) [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(H) of the Act. Not Applicable. Item 4. Ownership. Not Applicable Item 5. Ownership of Five Percent or Less of a Class. [ X ] Each of the reporting persons owns beneficially and of record no shares of Pediatrix Medical Group, Inc. as of December 31, 1996, with the exception of Messrs. Stamps, and Evans, who each hold 2,000 shares of Common Stock of Pediatrix Medical Group, Inc. 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 17 of 31 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 14, 1997 SUMMIT VENTURES III, L.P. * ------------------ E. Roe Stamps, IV By: Summit Partners III, L.P. By: Stamps, Woodsum & Co. III * ------------------ 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 /s/ John A. Genest -------------------------------- ------------------ General Partner John A. Genest SUMMIT PARTNERS III, L.P. * By: Stamps, Woodsum & Co. III ------------------ Ernest K. Jacquet By: * * ------------------------- ------------------ E. Roe Stamps, IV Bruce R. Evans General Partner STAMPS, WOODSUM & CO. III * ------------------- Walter G. Kortschak By: * * ------------------------------- ------------------- E. Roe Stamps, IV Thomas S. Roberts General Partner Page 18 of 31 *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 19 of 31 Pages 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 Pediatrix Medical Group, Inc. This agreement may be executed in any number of counterparts, each of which shall be deemed an original. EXECUTED this 14th day of February, 1997. SUMMIT VENTURES III, L.P. * ------------------ E. Roe Stamps, IV By: Summit Partners III, L.P. By: Stamps, Woodsum & Co. III * ------------------ 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 /s/ John A. Genest ---------------------------- ------------------ General Partner John A. Genest SUMMIT PARTNERS III, L.P. * ------------------ Ernest K. Jacquet By: Stamps, Woodsum & Co. III * ------------------ By: * Bruce R. Evans ------------------------------ E. Roe Stamps, IV General Partner Page 20 of 31 Pages STAMPS, WOODSUM & CO. III * ------------------- Walter G. Kortschak By: * * --------------------------- ------------------- E. Roe Stamps, IV Thomas S. Roberts General Partner *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 21 of 31 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 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 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., 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 22 of 31 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. Freedman --------------------------------- Notary Public October 20, 2000 --------------------------------- My Comission expires: Page 23 of 31 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. Freedman --------------------------------- Notary Public October 20, 2000 --------------------------------- My Comission expires: Page 24 of 31 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. Freedman --------------------------------- Notary Public October 20, 2000 --------------------------------- My Comission expires: Page 25 of 31 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. Freedman --------------------------------- Notary Public October 20, 2000 --------------------------------- My Comission expires: Page 26 of 31 IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 3rd 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 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/ Katherine C. Ely --------------------------------- Notary Public May 28, 2000 --------------------------------- My Comission expires: Page 27 of 31 IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 10th day of February, 1997. /s/ Ernest K. Jacquet ----------------------------------- Ernest K. Jacquet Commonwealth of Massachusetts ) ) ss: County of Suffolk ) On this 10th day of February, 1997, before me personally came Ernest K. Jacquet, 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 October 20, 2000 --------------------------------- My Comission expires: Page 28 of 31 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. Freedman --------------------------------- Notary Public /s/ Cynthia R. Freedman --------------------------------- My Comission expires: Page 29 of 31 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. Freedman --------------------------------- Notary Public October 20, 2000 --------------------------------- My Comission expires: Page 30 of 31 IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 3rd 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 May 28, 2000 --------------------------------- My Comission expires: Page 31 of 31