SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 -------------- SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) (AMENDMENT NO. 1)* Michael Baker Corporation -------------------------------------------------------------------------------- (Name of issuer) Common Stock, par value $1.00 per share -------------------------------------------------------------------------------- (Title of class of securities) 057149106 -------------------------------------------------------------------------------- (CUSIP number) Matthew J. Day, Esq. 118 E. 25th Street, Eighth Floor New York, New York 10010 (212) 673-0484 -------------------------------------------------------------------------------- (Name, address and telephone number of person authorized to receive notices and communications) April 28, 2004 -------------------------------------------------------------------------------- (Date of event which requires filing of this statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box [ ]. Note. The Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7(b) for other parties to whom copies are to be sent. (Continued on following pages) (Page 1 of 9 Pages) ------------------------------- *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 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). --------------------------------- ------------------------------ CUSIP No. 057149106 Page 2 of 9 Pages --------------------------------- ------------------------------ SCHEDULE 13D -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Acquisitor Holdings (Bermuda) Ltd. No I.R.S. Identification Number -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OR ORGANIZATION Bermuda -------------------------------------------------------------------------------- 7. SOLE VOTING POWER NUMBER OF 299,000 SHARES ---------------------------------------------------------------- BENEFICIALLY 8. SHARED VOTING POWER OWNED BY 0 EACH ---------------------------------------------------------------- REPORTING 9. SOLE DISPOSITIVE POWER PERSON 299,000 WITH ---------------------------------------------------------------- 10. SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 299,000 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES [ ] CERTAIN SHARES* -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.6% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! --------------------------------- ------------------------------ CUSIP No. 057149106 Page 3 of 9 Pages --------------------------------- ------------------------------ SCHEDULE 13D -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) J O Hambro Capital Management Group Limited No I.R.S. Identification Number -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS AF -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OR ORGANIZATION England -------------------------------------------------------------------------------- 7. SOLE VOTING POWER NUMBER OF 0 SHARES ---------------------------------------------------------------- BENEFICIALLY 8. SHARED VOTING POWER OWNED BY 87,900 EACH ---------------------------------------------------------------- REPORTING 9. SOLE DISPOSITIVE POWER PERSON 0 WITH ---------------------------------------------------------------- 10. SHARED DISPOSITIVE POWER 87,900 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 87,900 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES [ ] CERTAIN SHARES* -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.1% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* HC -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! --------------------------------- ------------------------------ CUSIP No. 057149106 Page 4 of 9 Pages --------------------------------- ------------------------------ SCHEDULE 13D -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) J O Hambro Capital Management Limited No I.R.S. Identification Number -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS AF -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OR ORGANIZATION England -------------------------------------------------------------------------------- 7. SOLE VOTING POWER NUMBER OF 0 SHARES ---------------------------------------------------------------- BENEFICIALLY 8. SHARED VOTING POWER OWNED BY 87,900 EACH ---------------------------------------------------------------- REPORTING 9. SOLE DISPOSITIVE POWER PERSON 0 WITH ---------------------------------------------------------------- 10. SHARED DISPOSITIVE POWER 87,900 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 87,900 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES [ ] CERTAIN SHARES* -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.1% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* IA -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! --------------------------------- ------------------------------ CUSIP No. 057149106 Page 5 of 9 Pages --------------------------------- ------------------------------ SCHEDULE 13D -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Christopher Harwood Bernard Mills No I.R.S. Identification Number -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS AF -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OR ORGANIZATION England -------------------------------------------------------------------------------- 7. SOLE VOTING POWER NUMBER OF 0 SHARES ---------------------------------------------------------------- BENEFICIALLY 8. SHARED VOTING POWER OWNED BY 87,900 EACH ---------------------------------------------------------------- REPORTING 9. SOLE DISPOSITIVE POWER PERSON 0 WITH ---------------------------------------------------------------- 10. SHARED DISPOSITIVE POWER 87,900 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 87,900 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES [ ] CERTAIN SHARES* -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.1% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! --------------------------------- ------------------------------ CUSIP No. 057149106 Page 6 of 9 Pages --------------------------------- ------------------------------ SCHEDULE 13D -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) American Opportunity Trust plc No I.R.S. Identification Number -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [X] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC -------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) [ ] -------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OR ORGANIZATION England -------------------------------------------------------------------------------- 7. SOLE VOTING POWER NUMBER OF 0 SHARES ---------------------------------------------------------------- BENEFICIALLY 8. SHARED VOTING POWER OWNED BY 87,900 EACH ---------------------------------------------------------------- REPORTING 9. SOLE DISPOSITIVE POWER PERSON 0 WITH ---------------------------------------------------------------- 10. SHARED DISPOSITIVE POWER 87,900 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 87,900 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES [ ] CERTAIN SHARES* -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.1% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON* IV -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT! --------------------------------- ------------------------------ CUSIP No. 057149106 Page 7 of 9 Pages --------------------------------- ------------------------------ AMENDMENT NO. 1 TO ------------------ STATEMENT ON SCHEDULE 13D ------------------------- This Amendment No. 1 to Statement on Schedule 13D (the "Amendment") is filed on behalf of the undersigned (the "Filing Parties"). This Amendment amends the Statement on Schedule 13D filed by the Filing Parties with the Securities and Exchange Commission (the "SEC") on May 27, 2003 (the "Schedule 13D"). Capitalized terms used herein and not otherwise defined shall have the same meanings ascribed to them in the Schedule 13D. ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION. Item 3 is hereby amended and restated as follows: The aggregate purchase price of the 299,000 shares of Common Stock beneficially held by Acquisitor Holdings (Bermuda) Ltd. ("Acquisitor") is $3,001,362 (including brokerage fees and expenses). All of the shares of Common Stock beneficially held by Acquisitor were paid for using its working capital funds. The aggregate purchase price of the 87,900 shares of Common Stock beneficially held by American Opportunity Trust is $769,323 (including brokerage fees and expenses). All of the shares of Common Stock beneficially held by American Opportunity Trust were paid for using its working capital funds. ITEM 5. INTEREST IN SECURITIES OF THE ISSUER. Item 5 is hereby amended and restated as follows: (a)-(b) The aggregate number and percentage of the outstanding Common Stock of the Issuer beneficially owned (i) by each of the Filing Parties, and (ii) to the knowledge of the Filing Parties, by each other person who may be deemed to be a member of a group, is as follows: Number of Number of Aggregate Shares: Sole Shares: Shared Number of Power to Vote or Power to Vote or Approximate Filing Party Shares Dispose Dispose Percentage* ------------------------------------------------------------------------------------------ Acquisitor 299,000 299,000 0 3.59% J O Hambro Group 87,900 0 87,900 1.06% J O Hambro Capital Management 87,900 0 87,900 1.06% Christopher H. B. Mills 87,900 0 87,900 1.06% American Opportunity Trust 87,900 0 87,900 1.06%------------------------------------------------------------------------------------------ * Based on 8,319,998 shares of Common Stock, par value $1.00 per share, outstanding as of February 27, 2004, as reported in the Issuer's Annual Report on Form 10-K, for the year ended December 31, 2003. --------------------------------- ------------------------------ CUSIP No. 057149106 Page 8 of 9 Pages --------------------------------- ------------------------------ (c) During the past 60 days, the Filing Parties effected no transactions in the Common Stock other than those set forth in the following table: -------------------------------------------------------------------------------- Number of Date Filing Party Buy or Sell Shares Price --------- ---------------------------------- ----------- ---------- -------- 4/19/2004 Acquisitor Holdings (Bermuda) Ltd. Sell (50,000) $12.5000 --------- ---------------------------------- ----------- ---------- -------- 4/28/2004 Acquisitor Holdings (Bermuda) Ltd. Sell (50,000) $12.6000 -------------------------------------------------------------------------------- All of the above transactions were effected on the open market. (d) No person other than the Filing Parties is known to have the right to receive, or the power to direct the receipt of dividends from, or the proceeds from the sale of, such shares of Common Stock. (e) The Filing Parties ceased to be five percent (5%) beneficial owners of the shares of Common Stock of the Issuer on April 28, 2004. --------------------------------- ------------------------------ CUSIP No. 057149106 Page 9 of 9 Pages --------------------------------- ------------------------------ SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: April 30, 2004 ACQUISITOR HOLDINGS (BERMUDA) LTD. By: /s/ Duncan Soukup ------------------------ Name: Duncan Soukup Title: Deputy Chairman