================================================================================ SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 6 TO SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 Zenith National Insurance Corp. ------------------------------- (Name of Issuer) Common Stock, $1.00 Par Value ------------------------------- (Title of Class of Securities) 989390109 ------------------------------- (CUSIP Number) Paul Rivett Vice President Fairfax Financial Holdings Limited 95 Wellington Street West, Suite 800 Toronto, Ontario, Canada, M5J 2N7 Telephone: (416) 367-4941 ------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) -- With a copy to -- Christopher J. Cummings Shearman & Sterling LLP Commerce Court West 199 Bay Street, Suite 4405 Toronto, Ontario M5L 1E8 Telephone (416) 360-8484 February 7, 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 which is the subject of this Schedule 13D, and is filing this schedule became of Rule 13d-1(b)(3) or (4), 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 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. 989390109 13D Page 2 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON V. PREM WATSA -------------------------------------------------------------------------------- 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 OF ORGANIZATION CANADIAN -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) (see Item 5) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) IN -------------------------------------------------------------------------------- 2 Cusip No. 989390109 13D Page 3 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON 1109519 ONTARIO LIMITED -------------------------------------------------------------------------------- 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 OF ORGANIZATION ONTARIO, CANADA -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) (see Item 5) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 3 Cusip No. 989390109 13D Page 4 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON THE SIXTY TWO INVESTMENT COMPANY LIMITED -------------------------------------------------------------------------------- 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 OF ORGANIZATION BRITISH COLUMBIA, CANADA -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) (see Item 5) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 4 Cusip No. 989390109 13D Page 5 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON 810679 ONTARIO LIMITED -------------------------------------------------------------------------------- 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 OF ORGANIZATION ONTARIO, CANADA -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) (see Item 5) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 5 Cusip No. 989390109 13D Page 6 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON FAIRFAX FINANCIAL HOLDINGS LIMITED -------------------------------------------------------------------------------- 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 OF ORGANIZATION CANADA -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) (see Item 5) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 6 Cusip No. 989390109 13D Page 7 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON CRC (BERMUDA) REINSURANCE LIMITED -------------------------------------------------------------------------------- 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 OF ORGANIZATION BERMUDA -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 7 Cusip No. 989390109 13D Page 8 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON FFHL GROUP LTD. -------------------------------------------------------------------------------- 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 OF ORGANIZATION CANADA -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) (see Item 5) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 8 Cusip No. 989390109 13D Page 9 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON FAIRFAX INC. -------------------------------------------------------------------------------- 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 OF ORGANIZATION WYOMING -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) (see Item 5) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 9 Cusip No. 989390109 13D Page 10 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON CRUM & FORSTER HOLDINGS CORP. -------------------------------------------------------------------------------- 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 OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 10 Cusip No. 989390109 13D Page 11 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON CRUM & FORSTER HOLDING INC. -------------------------------------------------------------------------------- 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 OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 11 Cusip No. 989390109 13D Page 12 of 32 Pages -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON UNITED STATES FIRE INSURANCE COMPANY -------------------------------------------------------------------------------- 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 OF ORGANIZATION DELAWARE -------------------------------------------------------------------------------- 7 SOLE VOTING POWER -------------------------------------------------- 8 SHARED VOTING POWER NUMBER OF SHARES BENEFICIALLY 0 OWNED BY EACH REPORTING --------------------------------------------------- PERSON WITH 9 SOLE DISPOSITIVE POWER --------------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 -------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions) [ ] -------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.0% -------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON (See Instructions) CO -------------------------------------------------------------------------------- 12 This Amendment No. 6 amends the Statement on Schedule 13D filed with the Securities and Exchange Commission (the "Commission") on July 6, 1999 by Fairfax Financial Holdings Limited ("Fairfax"), Hamblin Watsa Investment Counsel Ltd., The Sixty Two Investment Company Limited and V. Prem Watsa relating to the purchase of 6,574,445 shares of common stock, par value $1.00 per share (the "Common Stock"), of Zenith National Insurance Corp., a Delaware insurance holding company ("Zenith"), pursuant to a Stock Purchase Agreement (the "1999 Stock Purchase Agreement") dated as of June 25, 1999 between Fairfax and Reliance Insurance Company, which Statement on Schedule 13D (such schedule, as amended, being the "Schedule 13D") was amended by (i) Amendment No. 1 to the Statement on Schedule 13D relating to the Stock Purchase Agreement (the "2001 Stock Purchase Agreement") dated as of November 21, 2001 between Clearwater Insurance Company ("Clearwater"), a Delaware corporation, formerly known as Odyssey Reinsurance Corporation, and Zenith, providing for the purchase and sale of 1,000,000 shares of Common Stock of Zenith, (ii) Amendment No. 2 to the Statement on Schedule 13D relating to the purchase on March 21, 2003 by Odyssey America Reinsurance Corporation ("Odyssey America"), a Connecticut corporation, of $30,000,000 aggregate principal amount of 5.75% convertible senior notes due 2023 of Zenith (the "Senior Notes"), which Senior Notes are currently convertible, as described below in Item 5, into 1,200,000 shares of Common Stock of Zenith, (iii) Amendment No. 3 to the Statement on Schedule 13D relating to the sale of 3,100,000 shares of Common Stock of Zenith by certain subsidiaries of Fairfax pursuant to an underwriting agreement, dated as of July 27, 2004, among the underwriters named in Schedule A thereto, Zenith and certain subsidiaries of Fairfax, as selling stockholders, in connection with the sale of such shares in a public offering pursuant to a registration statement on Form S-3 filed by Zenith with the Commission; (iv) Amendment No. 4 to the Statement on Schedule 13D relating to the sale of 2,000,000 shares of Common Stock of Zenith by certain subsidiaries of Fairfax on August 2, 2005; and (v) Amendment No. 5 to the Statement on Schedule 13D relating to the sale of 157,524 shares of Common Stock of Zenith and $30,000,000 aggregate principal amount of the Senior Notes by certain subsidiaries of Fairfax on September 29, 2005. This Amendment No. 6 relates to the sale (the "Transaction") of 3,846,031 shares of Common Stock of Zenith by certain subsidiaries of Fairfax on February 7, 2006. After the Transaction, Fairfax beneficially owns zero shares of Common Stock of Zenith. The following amendments to Items 2, 4, 5 and 7 of the Schedule 13D are hereby made. ITEM 2. IDENTITY AND BACKGROUND Item 2 of the Schedule 13D is hereby amended in its entirety to read as follows: "This statement is being jointly filed by the following persons (collectively, the "Reporting Persons"): 1. V. Prem Watsa, an individual, is a citizen of Canada. Mr. Watsa's business address is 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada, M5J 2N7; 13 2. 1109519 Ontario Limited ("1109519"), a corporation incorporated under the laws of Ontario, is controlled by V. Prem Watsa. The principal business of 1109519 is as an investment holding company. The principal business address and principal office address of 1109519 is 95 Wellington Street West, Suite 800, Toronto, Ontario, M5J 2N7; 3. The Sixty Two Investment Company Limited ("Sixty Two"), a corporation incorporated under the laws of British Columbia, is controlled by V. Prem Watsa. The principal business of Sixty Two is as an investment holding company. The principal business address and principal office address of Sixty Two is 1600 Cathedral Place, 925 West Georgia St., Vancouver, British Columbia, Canada, V6C 3L3; 4. 810679 Ontario Limited ("810679"), a corporation incorporated under the laws of Ontario, is controlled by V. Prem Watsa. The principal business of 810679 is as an investment holding company. The principal business address and principal office address of 810679 is 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada, M5J 2N7; 5. Fairfax, a corporation incorporated under the laws of Canada, is controlled by Sixty Two, 1109519, and V. Prem Watsa. Fairfax is a financial services holding company. The principal business and principal office address of Fairfax is 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada, M5J 2N7; 6. CRC (Bermuda) Reinsurance Limited ("CRC (Bermuda)"), a corporation incorporated under the laws of Bermuda, is a wholly-owned subsidiary of Fairfax. The principal business of CRC (Bermuda) is reinsurance. The principal business address and principal office address of CRC (Bermuda) is c/o Westbrook Limited, Richmond House, 12 Par-la-Ville Road, P.O. Box HM 1022 Hamilton, HM DX Bermuda. 7. FFHL Group Ltd., a corporation incorporated under the laws of Canada, is a wholly-owned subsidiary of Fairfax. The principal business of FFHL Group Ltd. is as a holding company. The principal business address and principal office address of FFHL Group Ltd. is 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada, M5J 2N7; 8. Fairfax Inc., a corporation incorporated under the laws of Wyoming, is a wholly-owned subsidiary of Fairfax. The principal business of Fairfax Inc. is as a holding company. The principal business address and principal office address of Fairfax Inc. is 300 First Stamford Place, Stamford, CT 06902; 9. Crum & Forster Holdings Corp., a corporation incorporated under the laws of Delaware, is a wholly-owned subsidiary of Fairfax. The principal business of Crum & Forster Holdings Corp. is as a holding company. The principal business address and principal office address of Crum & Forster Holdings Corp. is 305 Madison Avenue, P.O. Box 1973, Morristown, New Jersey 07962; 14 10. Crum & Forster Holding Inc., a corporation incorporated under the laws of Delaware, is a wholly-owned subsidiary of Fairfax. The principal business of Crum & Forster Holding Inc. is as a holding company. The principal business address and principal office address of Crum & Forster Holding Inc. is 305 Madison Avenue, P.O. Box 1973, Morristown, New Jersey 07962; and 11. United States Fire Insurance Company ("US Fire"), a corporation incorporated under the laws of Delaware, is a wholly-owned subsidiary of Fairfax. The principal business of US Fire is insurance. The principal business address and principal office address of US Fire is 305 Madison Avenue, P.O. Box 1973, Morristown, New Jersey 07962. Neither the filing of this Schedule 13D nor the information contained herein shall be deemed to constitute an affirmation by V. Prem Watsa, 1109519, Sixty Two, 810679, Fairfax, CRC (Bermuda), FFHL Group Ltd., Fairfax Inc., Crum & Forster Holdings Corp., Crum & Forster Holding Inc. or US Fire that such person is the beneficial owner of the shares of Common Stock of Zenith referred to herein for purposes of Section 13(d) or 13(g) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or for any other purpose, and such beneficial ownership is expressly disclaimed. The name, present principal occupation or employment and name, principal business and address of any corporation or other organization in which such employment is conducted and the citizenship of each director and executive officer of each of the Reporting Persons (other than V. Prem Watsa, an individual) are set forth in Annex A, B, C, D, E, F, G, H, I or J, as the case may be, and such Annexes are incorporated herein by reference. Pursuant to Rule 13d-1(k) under the Exchange Act, the Reporting Persons have agreed to file jointly one statement with respect to their ownership of the shares of Common Stock of Zenith. During the last five years, none of the Reporting Persons, and, to the best of each such Reporting Person's knowledge, none of the executive officers or directors of such Reporting Person have been (a) convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors) or (b) a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws." ITEM 4. PURPOSE OF TRANSACTION Item 4 of the Schedule 13D is hereby amended in its entirety to read as follows: 15 "(a) - (j) The Reporting Persons have no plans or proposals regarding Zenith Common Stock." ITEM 5. INTEREST IN SECURITIES OF THE ISSUER Item 5 of the Schedule 13D is hereby amended in its entirety to read as follows: "(a) Based on the most recent information available, the aggregate number and percentage of the shares of Common Stock of Zenith (the securities identified pursuant to Item 1 of this Schedule 13D) that are beneficially owned by each of the Reporting Persons are set forth in boxes 11 and 13 of the second part of the cover page to this Schedule 13D for each of the Reporting Persons, and such information is incorporated herein by reference. (b) The numbers of shares of Common Stock of Zenith as to which each of the Reporting Persons has sole voting power, shared voting power, sole dispositive power and shared dispositive power are set forth in boxes 7, 8, 9 and 10, respectively, on the second part of the cover page to this Schedule 13D for each of the Reporting Persons, and such information is incorporated herein by reference. (c) Except as described herein, none of the Reporting Persons, nor, to the best knowledge of the Reporting Persons, any person listed in Annex A, B, C, D, E, F, G, H, I or J, beneficially owns, or during the last 60 days has acquired or disposed of, any shares of Common Stock of Zenith. (d) Not applicable. (e) On February 7, 2006, the Reporting Persons ceased to be beneficial owners of more than five percent of the Common Stock of Zenith." ITEM 7. MATERIAL TO BE FILED AS EXHIBITS Item 7 of the Schedule 13D is hereby amended by the addition of the following exhibits to the end thereof: "6.0 Joint Filing Agreement dated as of February 8, 2006 among V. Prem Watsa, 1109519 Ontario Limited, The Sixty Two Investment Company Limited, 810679 Ontario Limited, Fairfax Financial Holdings Limited., CRC (Bermuda) Reinsurance Limited, FFHL Group Ltd., Fairfax Inc., Crum & Forster Holdings Corp., Crum & Forster Holding Inc. and United States Fire Insurance Company." 16 SIGNATURE After reasonable inquiry and to the best of the undersigned's knowledge and belief, the undersigned certifies that the information set forth in this Schedule 13D with respect to the undersigned is true, complete and correct. IN WITNESS WHEREOF, the undersigned has executed this Schedule 13D as of the 8th day of February, 2006. V. Prem Watsa /s/ V. Prem Watsa ----------------------------------------- 1109519 Ontario Limited By: /s/ V. Prem Watsa ------------------------------------- Name: V. Prem Watsa Title: President The Sixty Two Investment Company Limited By: /s/ V. Prem Watsa ------------------------------------- Name: V. Prem Watsa Title: President 17 810679 Ontario Limited By: /s/ V. Prem Watsa ------------------------------------- Name: V. Prem Watsa Title: President Fairfax Financial Holdings Limited By: /s/ Paul Rivett ------------------------------------- Name: Paul Rivett Title: Vice President CRC (Bermuda) Reinsurance Limited By: /s/ Ronald Schokking ------------------------------------- Name: Ronald Schokking Title: Director FFHL Group Ltd. By: /s/ V. Prem Watsa ------------------------------------- Name: V. Prem Watsa Title: Vice President and Director 18 Fairfax Inc. By: /s/ John Cassil ------------------------------------- Name: John Cassil Title: Vice President Crum & Forster Holdings Corp. By: /s/ Carol Ann Soos ------------------------------------- Name: Carol Ann Soos Title: Secretary Crum & Forster Holding Inc. By: /s/ Valerie J. Gasparik ------------------------------------- Name: Valerie J. Gasparik Title: Secretary United States Fire Insurance Company By: /s/ Carol Ann Soos ------------------------------------- Name: Carol Ann Soos Title: Vice President 19 ANNEX INDEX ANNEX DESCRIPTION ----- ----------- A Directors and Executive Officers of 1109519 Ontario Limited B Directors and Executive Officers of The Sixty Two Investment Company Limited C Directors and Executive Officers of 810679 Ontario Limited D Directors and Executive Officers of Fairfax Financial Holdings Limited E Directors and Executive Officers of CRC (Bermuda) Reinsurance Limited F Directors and Executive Officers of FFHL Group Ltd. G Directors and Executive Officers of Fairfax Inc. H Directors and Executive Officers of Crum & Forster Holdings Corp. I Directors and Executive Officers of Crum & Forster Holding Inc. J Directors and Executive Officers of United States Fire Insurance Company 20 ANNEX A DIRECTORS AND EXECUTIVE OFFICERS OF 1109519 ONTARIO LIMITED The following table sets forth certain information with respect to the directors and executive officers of 1109519 Ontario Limited. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- V. Prem Watsa Chairman and Chief Executive Officer, Canadian (President and Director) Fairfax Financial Holdings Limited 95 Wellington Street West Suite 800 Toronto, Ontario M5J 2N7 Eric P. Salsberg Vice President, Corporate Affairs, Fairfax Canadian (Assistant Secretary and Director) Financial Holdings Limited 21 ANNEX B DIRECTORS AND EXECUTIVE OFFICERS OF THE SIXTY TWO INVESTMENT COMPANY LIMITED The following table sets forth certain information with respect to the directors and executive officers of The Sixty Two Investment Company Limited. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- ---------------------------------- ----------- V. Prem Watsa Chairman and Chief Executive Officer, Canadian (President and Director) Fairfax Financial Holdings Limited 95 Wellington Street West Suite 800 Toronto, Ontario M5J 2N7 Eric P. Salsberg Vice President, Corporate Affairs, Fairfax Canadian (Assistant Secretary and Director) Financial Holdings Limited 22 ANNEX C DIRECTORS AND EXECUTIVE OFFICERS OF 810679 ONTARIO LIMITED The following table sets forth certain information with respect to the directors and executive officers of 810679 Ontario Limited. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- V. Prem Watsa Chairman and Chief Executive Officer, Canadian (President and Director) Fairfax Financial Holdings Limited 95 Wellington Street West Suite 800 Toronto, Ontario M5J 2N7 Eric P. Salsberg Vice President, Corporate Affairs, Fairfax Canadian (Assistant Secretary and Director) Financial Holdings Limited 23 ANNEX D DIRECTORS AND EXECUTIVE OFFICERS OF FAIRFAX FINANCIAL HOLDINGS LIMITED The following table sets forth certain information with respect to the directors and executive officers of Fairfax Financial Holdings Limited. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- V. Prem Watsa Chairman and Chief Executive Officer, Fairfax Canadian (Chairman and Chief Executive Officer) Financial Holdings Limited 95 Wellington Street West Suite 800 Toronto, Ontario M5J 2N7 Frank B. Bennett President, Artesian Management Inc. United States (Director) 301 Carlson Parkway, Suite 120 Minnetonka, MN 55305 Robbert Hartog President, Robhar Investments Ltd. Canadian (Director) R.R. #1 Perkinsfield, Ontario L0L 2J0 Anthony Griffiths Independent Business Consultant Canadian (Director) Toronto, Ontario, Canada Paul Murray President, Canadian (Director) Pine Smoke Investments Toronto, Ontario, Canada Brandon W. Sweitzer Senior Advisor to the President of the United States (Director) Chamber of Commerce of the United States 1615 H Street, NW Washington, DC 20062 24 PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- Greg Taylor Vice President and Chief Canadian (Vice President and Chief Financial Officer) Financial Officer, Fairfax Financial Holdings Limited Eric P. Salsberg Vice President, Corporate Affairs, Canadian (Vice President, Corporate Affairs) Fairfax Financial Holdings Limited Paul Rivett Vice President, Canadian (Vice President) Fairfax Financial Holdings Limited 25 ANNEX E DIRECTORS AND EXECUTIVE OFFICERS OF CRC (BERMUDA) REINSURANCE LIMITED The following table sets forth certain information with respect to the directors and executive officers of CRC (Bermuda) Reinsurance Limited. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN WHICH NAME SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- ---------------------------------------------- ----------- Sam Chan Vice President Canadian (Director and President) Fairfax Financial Holdings Limited 95 Wellington Street West, Ste. 800 Toronto, ON Charles Collis Attorney British/Bermudian (Director) Conyers Dill & Pearman Clarendon House, Church Street Hamilton, Bermuda Christopher Garrod Attorney British/Bermudian (Director) Conyers Dill & Pearman Clarendon House, Church Street Hamilton, Bermuda Ronald Schokking Vice President, Finance Canadian (Director) Fairfax Financial Holdings Limited Bradley P. Martin Vice President Canadian (Vice President) Fairfax Financial Holdings Limited Eric P. Salsberg Vice President, Corporate Affairs Canadian (Vice President) Fairfax Financial Holdings Limited 26 ANNEX F DIRECTORS AND EXECUTIVE OFFICERS OF FFHL GROUP LTD. The following table sets forth certain information with respect to the directors and executive officers of FFHL Group Ltd. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- James F. Dowd President and Chief Executive Officer, United States (Chairman) Fairfax Inc. 305 Madison Avenue Morristown, NJ 07962 Eric P. Salsberg Vice President, Corporate Affairs, Canadian (Vice President and Director) Fairfax Financial Holdings Limited 95 Wellington Street West Suite 800 Toronto, Ontario M5J 2N7 Bradley P. Martin Vice President, Canadian (Vice President and Secretary) Fairfax Financial Holdings Limited V. Prem Watsa Chairman and Chief Executive Officer, Canadian (Vice President and Director) Fairfax Financial Holdings Limited Ronald Schokking Vice President, Finance Canadian (Vice President) Fairfax Financial Holdings Limited M. Jane Williamson Vice President, Canadian (Director) Fairfax Financial Holdings Limited 27 ANNEX G DIRECTORS AND EXECUTIVE OFFICERS OF FAIRFAX INC. The following table sets forth certain information with respect to the directors and executive officers of Fairfax Inc. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- James F. Dowd Chairman, President and Chief Executive United States (Chairman, President, CEO and Director) Officer, Fairfax Inc. 305 Madison Avenue Morristown, NJ 07962 Eric P. Salsberg Vice President, Corporate Affairs, Canadian (Vice President and Director) Fairfax Financial Holdings Limited 95 Wellington Street West Suite 800 Toronto, Ontario M5J 2N7 John Cassil Vice President and Treasurer, United States (Vice President, Treasurer and Director) Fairfax Inc. Bradley P. Martin Vice President, Canadian (Corporate Secretary) Fairfax Financial Holdings Limited 28 ANNEX H DIRECTORS AND EXECUTIVE OFFICERS OF CRUM & FORSTER HOLDINGS CORP. The following table sets forth certain information with respect to the directors and executive officers of Crum & Forster Holdings Corp. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- V. Prem Watsa Chairman and Chief Executive Officer, Fairfax Canadian (Chairman) Financial Holdings Limited 95 Wellington Street West Suite 800 Toronto, Ontario M5J 2N7 Nikolas Antonopoulos Chief Executive Officer and President, United States (Chief Executive Officer and President) Crum & Forster Holdings Corp. and various other insurance subsidiaries 305 Madison Avenue, P.O. Box 1973 Morristown, NJ 07962 Mary Jane Robertson Executive Vice President, Chief Financial United States (Executive Vice President, Chief Financial Officer and Treasurer, Officer and Treasurer) Crum & Forster Holdings Corp. and various other insurance subsidiaries Frank B. Bennett President, Artesian Management Inc. United States (Director) 301 Carlson Parkway, Suite 120 Minnetonka, MN 55305 Robbert Hartog President, Robhar Investments Ltd. Canadian (Director) R.R. #1 Perkinsfield, Ontario L0L 2J0 Anthony Griffiths Independent Business Consultant Canadian (Director) Toronto, Ontario, Canada 29 ANNEX I DIRECTORS AND EXECUTIVE OFFICERS OF CRUM & FORSTER HOLDING INC. The following table sets forth certain information with respect to the directors and executive officers of Crum & Forster Holding Inc. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- Nikolas Antonopoulos Chief Executive Officer and President, United States (Chairman, Chief Executive Officer and Director) Crum & Forster Holdings Corp. and various other insurance subsidiaries 305 Madison Avenue, P.O. Box 1973 Morristown, NJ 07962 Joseph F. Braunstein, Jr. President, United States (President and Director) Crum & Forster Holding Inc. and various other insurance subsidiaries 305 Madison Avenue, P.O. Box 1973 Morristown, NJ 07962 Mary Jane Robertson Executive Vice President, Chief Financial United States (Executive Vice President, Treasurer and Officer and Treasurer, Director) Crum & Forster Holdings Corp. and various other insurance subsidiaries Douglas M. Libby President, United States (Senior Vice President and Director) Seneca Insurance Company 160 Water Street New York, NY 10038 30 ANNEX J DIRECTORS AND EXECUTIVE OFFICERS OF UNITED STATES FIRE INSURANCE COMPANY The following table sets forth certain information with respect to the directors and executive officers of United States Fire Insurance Company. PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND THE NAME, PRINCIPAL BUSINESS AND ADDRESS OF ANY CORPORATION OR OTHER ORGANIZATION IN NAME WHICH SUCH EMPLOYMENT IS CONDUCTED CITIZENSHIP ---- -------------------------------------------- ----------- Nikolas Antonopoulos Chief Executive Officer and President, United States (Chief Executive Officer, Chairman and Director) Crum & Forster Holdings Corp. and various other insurance subsidiaries 305 Madison Avenue, P.O. Box 1973 Morristown, NJ 07962 Joseph F. Braunstein, Jr. President, United States (President and Director) Crum & Forster Holding Inc. and various other insurance subsidiaries 305 Madison Avenue Morristown, NJ 07962 Mary Jane Robertson Executive Vice President, Chief Financial United States (Executive Vice President, Chief Financial Officer and Treasurer, Officer, Treasurer and Director) Crum & Forster Holdings Corp. and various other insurance subsidiaries Dennis J. Hammer Senior Vice President and Controller, United States (Senior Vice President and Controller) United States Fire Insurance Company, 305 Madison Avenue, P.O. Box 1973 Morristown, NJ 07962 31 EXHIBIT INDEX EXHIBIT NO. DESCRIPTION ----------- ----------- 6.0 Joint Filing Agreement dated as of February 8, 2006 among V. Prem Watsa, 1109519 Ontario Limited, The Sixty Two Investment Company Limited, 810679 Ontario Limited, Fairfax Financial Holdings Limited., CRC (Bermuda) Reinsurance Limited, FFHL Group Ltd., Fairfax Inc., Crum & Forster Holdings Corp., Crum & Forster Holding Inc. and United States Fire Insurance Company. 32