United States Securities and Exchange Commission Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 6) John Hancock Patriot Premium Dividend Fund II (Name of Issuer) Common Stock (Title of Class of Securities) 41013T-10-5 (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) June 4, 2003 (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 which 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: [X] 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 6 CUSIP No.: 41013T-10-5 THE COMMERCE GROUP, INC. SCHEDULE 13D AMENDMENT No. 6 JUNE 18, 2003 1. NAME OF REPORTING PERSON S.S. OR I.R.S. ID 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 BOX 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 SOLE VOTING POWER 5,270,200 SHARED VOTING POWER 0 SOLE DISPOSITIVE POWER 5,270,200 SHARED DISPOSITIVE POWER 0 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,270,200 12. CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [ ] 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 35.1% 14. TYPE OF REPORTING PERSON [HC] Page 2 of 6 CUSIP No.: 41013T-10-5 THE COMMERCE GROUP, INC. SCHEDULE 13D AMENDMENT No. 6 JUNE 18, 2003 ITEM 1. SECURITY AND ISSUER This Schedule 13D relates to the shares of beneficial interest (the "Shares"), of John Hancock Patriot Premium Dividend Fund II (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 101 Huntington Avenue, Boston, MA, 02119-7603. ITEM 2. IDENTITY AND BACKGROUND (a) - (f) 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. No material changes have taken place with respect to director or officer information of the Reporting Person. 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 reported in Annex A aggregated approximately $907,883. 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 15,017,005 Shares are outstanding. Based upon such number, the Reporting Person beneficially owns 35.1% of the Fund's outstanding Shares. (b) The Reporting Person is the beneficial owner (through its insurance subsidiaries as listed below) of 5,270,200 Shares, over which it has sole power of disposition and voting. Such number of Shares represents approximately 35.1% of the outstanding Shares. Shares Cost The Commerce Insurance Company 4,982,400 $53,944,821 American Commerce Insurance Company 152,300 1,486,886 Commerce West Insurance Company 135,500 1,496,558 Totals 5,270,200 $56,928,265 (c) During the period from May 1, 2002 through June 4, 2003, the Reporting Person has effected the following purchases and sales of common stock, all of which were made on the New York Stock Exchange (see attached Annex A). All transactions prior to May 1, 2002 were reported on previous Schedule 13 D filings. (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) It is inapplicable to state the date on which the Reporting Person ceased to be the beneficial owner of more than five percent of the Common Stock. Page 3 of 6 CUSIP No.: 41013T-10-5 THE COMMERCE GROUP, INC. SCHEDULE 13D AMENDMENT No. 6 JUNE 18, 2003 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. June 18, 2003 THE COMMERCE GROUP INC. Gerald Fels Executive Vice President & Chief Financial Officer Page 4 of 6 ANNEX A Item 5 (c) - Information PDT 41013T-10-5 JOHN HANCOCK PATRIOT DIV FUND II From 05/01/03 - 06/04/03 COMMERCE INSURANCE COMPANY SALES TRADE SETTLEMENT SHARES SALE PRICE DATE DATE SOLD PER SHARE CONSIDERATION 04/17/03 04/23/03 3,200 $10.4000 $ 33,150.44 04/28/03 05/01/03 2,300 10.1722 23,302.96 04/30/03 05/05/03 15,200 10.2104 154,582.82 05/01/03 05/06/03 3,100 10.2159 31,543.80 05/01/03 05/06/03 2,300 10.2159 23,403.47 05/02/03 05/07/03 13,800 10.1809 139,937.84 05/02/03 05/07/03 26,600 10.1809 269,735.27 05/05/03 05/08/03 500 10.2000 5,079.76 05/06/03 05/09/03 2,500 10.2000 25,398.80 05/07/03 05/12/03 11,200 10.1978 113,762.01 05/08/03 05/13/03 7,900 10.2224 $ 80,437.18 COMMERCE SALE TOTALS 88,600 $ 900,334.35 COMMERCE INSURANCE COMPANY PURCHASES TRADE SETTLEMENT SHARES SALE PRICE ACQUISITION DATE DATE PURCHASED PER SHARE COST 05/07/02 05/10/02 10,700 $11.1000 $ 119,198.00 05/20/02 05/23/02 800 11.0500 8,872.00 05/22/02 05/28/02 2,000 11.0500 22,180.00 07/08/02 07/11/02 2,000 10.5600 21,200.00 07/11/02 07/16/02 4,000 10.2000 40,960.00 07/22/02 07/25/02 49,900 10.0500 503,491.00 07/23/02 07/26/02 16,500 9.9000 164,010.00 08/06/02 08/09/02 2,800 9.9500 27,972.00 COMMERCE PURCHASE TOTALS 88,700 $ 907,883.00 NET COMMERCE SALE TOTAL (100) $ (7,548.65) Page 5 of 6 ANNEX A Item 5 (c) - Information (continued) PDT 41013T-10-5 JOHN HANCOCK PATRIOT DIV FUND II From 05/01/03 - 06/04/03 AMERICAN COMMERCE INSURANCE CO SALES TRADE SETTLEMENT SHARES SALE PRICE ACQUISITION DATE DATE PURCHASED PER SHARE COST 04/21/03 04/24/03 8,100 $10.3423 $ 83,444.70 04/22/03 04/25/03 900 10.3500 9,278.56 04/22/03 04/25/03 1,500 10.3500 15,464.27 04/23/03 04/28/03 400 10.3250 4,113.80 04/29/03 05/02/03 1,500 10.2433 15,304.24 05/08/03 05/13/03 5,700 10.2300 58,080.27 05/08/03 05/13/03 700 10.2300 7,132.66 05/08/03 05/13/03 2,700 10.2300 27,511.71 05/09/03 05/14/03 1,000 10.2000 10,159.52 05/09/03 05/14/03 1,000 10.2000 10,159.52 05/09/03 05/14/03 1,500 10.2000 15,239.28 05/12/03 05/15/03 3,000 10.2159 30,526.26 05/12/03 05/15/03 3,300 10.2159 33,578.89 05/13/03 05/16/03 1,000 10.2100 10,169.52 05/14/03 05/19/03 2,500 10.2300 25,473.80 05/15/03 05/20/03 8,000 10.2105 81,360.17 05/15/03 05/20/03 4,500 10.2105 45,765.10 05/22/03 05/28/03 4,600 10.5483 48,335.90 05/23/03 05/29/03 1,700 10.6800 18,087.15 05/27/03 05/30/03 18,200 10.8736 197,162.25 05/27/03 05/30/03 1,300 10.8736 14,083.02 05/28/03 06/02/03 4,300 11.0381 47,289.61 05/28/03 06/02/03 11,300 11.0381 124,272.69 05/29/03 06/03/03 6,200 11.1252 68,725.01 05/29/03 06/03/03 8,900 11.1252 98,653.65 05/30/03 06/04/03 1,000 11.2400 11,199.47 06/02/03 06/05/03 1,200 11.1000 13,271.38 06/03/03 06/06/03 26,900 11.0362 295,783.89 06/04/03 06/09/03 14,800 10.9221 161,047.51 AMERICAN COMMERCE SALE TOTALS 147,700 $1,580,673.80 NO ACIC PURCHASES DURING PERIOD NET CONSOLIDATED SALE TOTAL 147,600 $1,573,125.15 Page 6 of 6