United States Securities and Exchange Commission Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 18) John Hancock Patriot Global Dividend Fund (Name of Issuer) Common Stock (Title of Class of Securities) 41013G-10-3 (CUSIP Number) The Commerce Group, Inc. 211 Main Street Webster, MA 01570 (508) 943-9000 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) July 17, 2006 (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 Section 240. Rule 13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box: [ ] 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 ("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 5 CUSIP No.: 41013G-10-3 THE COMMERCE GROUP, INC. SCHEDULE 13D AMENDMENT No. 18 JULY 27, 2006 1. NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NO. OF ABOVE PERSON The Commerce Group Inc. ID# 04-2599931 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [ ] (b) [ ] 3. SEC USE ONLY 4. SOURCE OF FUNDS [WC] 5 CHECK IF DISCLOSURE OF LEGAL [ ] PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e) 6. CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 7. SOLE VOTING POWER 1,859,800 8. SHARED VOTING POWER 0 9. SOLE DISPOSITIVE POWER 1,859,800 10. SHARED DISPOSITIVE POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,859,800 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 22.3% 14. TYPE OF REPORTING PERSON [HC] Page 2 of 5 CUSIP No.: 41013G-10-3 THE COMMERCE GROUP, INC. SCHEDULE 13D AMENDMENT No. 18 JULY 27, 2006 ITEM 1. SECURITY AND ISSUER This Schedule 13D relates to the shares of beneficial interest (the "Shares"), of John Hancock Patriot Global Dividend Fund (the "Fund"), a Massachusetts business trust registered as an investment company under the Investment Company Act of 1940, as amended (the "Investment Company Act"). The principal executive offices of the Fund are located at 601 Congress Street, Boston, MA 02210. ITEM 2. IDENTITY AND BACKGROUND (a) - (c) This Schedule 13D is being filed by The Commerce Group Inc. (the "Reporting Person"), a corporation formed under the laws of Massachusetts. The Reporting Person is a corporation whose principal offices are located at 211 Main Street, Webster, MA 01570. (d) During the last five years, the Reporting Person has not been convicted in any criminal proceedings (excluding traffic violations or similar misdemeanors). (e) During the last five years, the Reporting Person has not been party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceedings was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activity subject to, federal or state securities laws or finding any violation with respect to such laws. ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION The source of the funds used by the Reporting Person to purchase shares listed in Item 5(a) was working capital. The amount of the funds used to purchase such shares aggregated approximately $1,067,626. ITEM 4. PURPOSE OF TRANSACTION No material change has taken place since the previous filing. ITEM 5. INTEREST IN SECURITIES OF THE ISSUER (a) The Fund's reports with the Securities and Exchange Commission report that 8,344,700 Shares are outstanding. Based upon such number, the Reporting Person beneficially owns 22.3% of the Fund's outstanding Shares. (b) The Reporting Person is the beneficial owner (through its insurance subsidiaries as listed below) of 1,859,800 shares, over which it has sole power of disposition and voting. Such number of Shares represents approximately 22.3% of the outstanding Shares. Shares Cost The Commerce Insurance Company 1,859,800 $21,501,668 Page 3 of 5 CUSIP No.: 41013G-10-3 THE COMMERCE GROUP, INC. SCHEDULE 13D AMENDMENT No. 18 JULY 27, 2006 (c) During the period from December 28, 2005 through July 17, 2006, the Reporting Person has effected the following sales of Common Stock, all of which were made on the New York Stock Exchange (see attached Annex A). (d) No person other than the Reporting Person has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Common Stock owned by the Reporting Person. (e) Not applicable. ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER The Reporting Person does not have any contract, arrangement, understanding or relationship (legal or otherwise) with any person with respect to any securities of the Fund, including, but not limited to, the transfer or voting of any such securities, finders' fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or loss, or the giving or withholding of proxies. ITEM 7. MATERIAL TO BE FILED AS EXHIBITS Annex A Item 5(c) Information 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. July 27, 2006 THE COMMERCE GROUP INC. /s/ John M. Meciak John M. Meciak Assistant Treasurer Page 4 of 5 ANNEX A Item 5 (c) - Information FROM 12/28/2005 - 07/17/06 PGD 41013G-10-3 JOHN HANCOCK PATRIOT GLOBAL DIVIDEND FUND COMMERCE INSURANCE CO PURCHASES TRADE SETTLEMENT SHARES PRICE ACQUISITION DATE DATE PURCHASED PER SHARE COST 01/17/06 01/20/06 1,200 $12.06 $ 14,517.00 06/07/06 06/12/06 3,800 11.60 44,195.90 06/08/06 06/13/06 7,700 11.53 89,016.62 06/09/06 06/14/06 3,300 11.49 38,039.43 06/12/06 06/15/06 11,400 11.62 132,894.36 06/13/06 06/16/06 6,800 11.60 79,111.88 06/14/06 06/19/06 10,000 11.65 116,849.00 06/15/06 06/20/06 8,900 11.65 103,956.45 06/16/06 06/21/06 3,400 11.82 40,307.00 06/19/06 06/22/06 7,200 11.76 84,888.72 06/20/06 06/23/06 3,700 11.74 43,549.37 06/21/06 06/26/06 200 11.65 2,337.00 06/22/06 06/27/06 2,400 11.68 28,105.92 06/27/06 06/30/06 5,100 11.75 60,098.40 07/05/06 07/10/06 3,900 11.35 44,388.63 07/13/06 07/18/06 8,100 11.54 93,741.30 07/14/06 07/19/06 2,900 11.52 33,509.50 07/17/06 07/20/06 1,600 11.29 18,120.00 TOTALS: 91,600 $ 1,067,626 Page 5 of 5