SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G

                               (Amendment No. 4)*

                    Under the Securities Exchange Act of 1934

                       Fairfax Financial Holdings Limited
                                (Name of Issuer)

                            Subordinate Voting Shares
                         (Title of Class of Securities)

                                   303 901 102
                                 (CUSIP Number)

                                DECEMBER 31, 2006
             (Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

     [ ]  Rule 13d-1(b)

     [ ]  Rule 13d-1(c)

     [X]  Rule 13d-1(d)

*    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).



Cusip No. 303 901 102                   13G                   Page 2 of 13 Pages


--------------------------------------------------------------------------------
1    Names of Reporting Person/I.R.S. Identification Nos. of Above Persons
     (Entities Only)

     V. PREM WATSA
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

     (a) [ ]
     (b) [X]
--------------------------------------------------------------------------------
3    SEC USE ONLY

--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     CANADIAN
--------------------------------------------------------------------------------
               5   SOLE VOTING POWER

                   96,799
               -----------------------------------------------------------------
  NUMBER OF    6   SHARED VOTING POWER
   SHARES
BENEFICIALLY       1,760,455
  OWNED BY     -----------------------------------------------------------------
    EACH       7   SOLE DISPOSITIVE POWER
  REPORTING
 PERSON WITH       96,799
               -----------------------------------------------------------------
               8   SHARED DISPOSITIVE POWER

                   1,760,455
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,857,254
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

     [ ]
--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     10.0%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON

     IN
--------------------------------------------------------------------------------


                                        2



Cusip No. 303 901 102                   13G                   Page 3 of 13 Pages


--------------------------------------------------------------------------------
1    Names of Reporting Person/I.R.S. Identification Nos. of Above Persons
     (Entities Only)

     1109519 ONTARIO LIMITED
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

     (a) [ ]
     (b) [X]
--------------------------------------------------------------------------------
3    SEC USE ONLY

--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     ONTARIO, CANADA
--------------------------------------------------------------------------------
               5   SOLE VOTING POWER

               -----------------------------------------------------------------
  NUMBER OF    6   SHARED VOTING POWER
   SHARES
BENEFICIALLY       1,598,620
  OWNED BY     -----------------------------------------------------------------
    EACH       7   SOLE DISPOSITIVE POWER
  REPORTING
 PERSON WITH   -----------------------------------------------------------------
               8   SHARED DISPOSITIVE POWER

                   1,598,620
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,598,620
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

     [ ]
--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     8.6%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON

     CO
--------------------------------------------------------------------------------


                                        3



Cusip No. 303 901 102                   13G                   Page 4 of 13 Pages


--------------------------------------------------------------------------------
1    Names of Reporting Person/I.R.S. Identification Nos. of Above Persons
     (Entities Only)

     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    CITIZENSHIP OR PLACE OF ORGANIZATION

     BRITISH COLUMBIA, CANADA
--------------------------------------------------------------------------------
               5   SOLE VOTING POWER

               -----------------------------------------------------------------
  NUMBER OF    6   SHARED VOTING POWER
   SHARES
BENEFICIALLY       1,598,620
  OWNED BY     -----------------------------------------------------------------
    EACH       7   SOLE DISPOSITIVE POWER
  REPORTING
 PERSON WITH   -----------------------------------------------------------------
               8   SHARED DISPOSITIVE POWER

                   1,598,620
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,598,620
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

     [ ]
--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     8.6%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON

     CO
--------------------------------------------------------------------------------


                                        4



Cusip No. 303 901 102                   13G                   Page 5 of 13 Pages


--------------------------------------------------------------------------------
1    Names of Reporting Person/I.R.S. Identification Nos. of Above Persons
     (Entities Only)

     810679 ONTARIO LIMITED
--------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

     (a) [ ]
     (b) [X]
--------------------------------------------------------------------------------
3    SEC USE ONLY

--------------------------------------------------------------------------------
4    CITIZENSHIP OR PLACE OF ORGANIZATION

     ONTARIO, CANADA
--------------------------------------------------------------------------------
               5   SOLE VOTING POWER

               -----------------------------------------------------------------
  NUMBER OF    6   SHARED VOTING POWER
   SHARES
BENEFICIALLY       159,735
  OWNED BY     -----------------------------------------------------------------
    EACH       7   SOLE DISPOSITIVE POWER
  REPORTING
 PERSON WITH   -----------------------------------------------------------------
               8   SHARED DISPOSITIVE POWER

                   159,735
--------------------------------------------------------------------------------
9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     159,735
--------------------------------------------------------------------------------
10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

     [ ]
--------------------------------------------------------------------------------
11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

     0.9%
--------------------------------------------------------------------------------
12   TYPE OF REPORTING PERSON

     CO
--------------------------------------------------------------------------------


                                        5



ITEM 1 (A). NAME OF ISSUER:

Fairfax Financial Holdings Limited ("Fairfax")

ITEM 1 (b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

95 Wellington Street West, Suite 800, Toronto, Ontario, Canada M5J 2N7

ITEM 2 (A). NAME OF PERSON FILING:

     This statement is being jointly filed by the following persons
(collectively, the "Reporting Persons"):

     1.   V. Prem Watsa, an individual;

     2.   1109519 Ontario Limited ("1109519"), a corporation incorporated under
          the laws of Ontario;

     3.   The Sixty Two Investment Company Limited ("Sixty Two"), a corporation
          incorporated under the laws of British Columbia; and

     4.   810679 Ontario Limited ("810679"), a corporation incorporated under
          the laws of Ontario.

ITEM 2 (b). ADDRESS OF PRINCIPAL BUSINESS OFFICE:

     The addresses of the Reporting Persons are as follows:

     1.   Mr. Watsa's business address is 95 Wellington Street West, Suite 800,
          Toronto, Ontario, Canada, M5J 2N7;

     2.   The principal business address and principal office address of 1109519
          is 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada, M5J
          2N7;

     3.   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; and

     4.   The principal business address and principal office address of 810679
          is 95 Wellington Street West, Suite 800, Toronto, Ontario, Canada, M5J
          2N7.

ITEM 2 (c). CITIZENSHIP:

V. Prem Watsa is a citizen of Canada.


                                        6



ITEM 2 (d). TITLE OF CLASS OF SECURITIES:

Subordinate Voting Shares

ITEM 2 (e). CUSIP NUMBER:

303 901 102

ITEM 3 IF THIS STATEMENT IS FILED PURSUANT TO RULE 13D-1(B), OR 13D-2(B) OR (C),
     CHECK WHETHER THE PERSON FILING IS A:

(A) [ ] Broker or Dealer registered under Section 15 of the Act (15 U.S.C. 78o);

(B) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);

(C) [ ] Insurance Company as defined in section 3(a)(19) of the Act (15 U.S.C.
        78c);

(D) [ ] An Investment Company registered under section 8 of the Investment
        Company Act of 1940 (15 U.S.C. 80a-8);

(E) [ ] An investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E);

(F) [ ] An employee benefit plan or endowment fund in accordance with Section
        240.13d-1(b)(1)(ii)(F);

(G) [ ] A parent holding company or control person, in accordance with Section
        240.13d-1(b)(1)(ii)(G);

(H) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit
        Insurance Act (12 U.S.C. 1813);

(I) [ ] A church plan that is excluded from the definition of an investment
        company under section 3(c)(14) of the Investment Company Act of 1940
        (15 U.S.C. 80a-3);

(J) [ ] Group, in accordance with Section 240.13d-1(b)(1)(ii)(J).

ITEM 4 OWNERSHIP.

The aggregate number and percentage of the Subordinate Voting Shares of Fairfax
("Subordinate Voting Shares") that are beneficially owned by each of the
Reporting Persons, assuming full conversion of all of the convertible securities
held by such Reporting Person, is set forth in boxes 9 and 11 of the second part
of the cover page to this Schedule 13G, and such information is incorporated
herein by reference.

The number of Subordinate Voting Shares as to which each of the Reporting
Persons has sole voting power, shared voting power, sole dispositive power and
shared dispositive power, assuming full conversion of all of the convertible
securities held by such Reporting Person, is set


                                        7



forth in boxes 5, 6, 7 and 8, respectively, on the second part of the cover page
to this Schedule 13G, and such information is incorporated herein by reference.

Sixty Two, which is controlled by 1109519, owns 50,620 Subordinate Voting Shares
and 1,548,000 Multiple Voting Shares of Fairfax (which are convertible at any
time into Subordinate Voting Shares on the basis of one Subordinate Voting Share
for each Multiple Voting Share being converted). 810679 owns 159,735 Subordinate
Voting Shares. V. Prem Watsa controls 1109519, Sixty Two and 810679 and himself
beneficially owns an additional 96,799 Subordinate Voting Shares and exercises
control or direction over an additional 2,100 Subordinate Voting Shares.

Neither the filing of this Schedule 13G nor the information contained herein
shall be deemed to constitute an affirmation by V. Prem Watsa, 1109519, Sixty
Two, or 810679 that such person is the beneficial owner of the Subordinate
Voting Shares referred to herein for purposes of Section 13(d) or 13(g) of the
Securities Exchange Act of 1934, as amended, or for any other purpose, and such
beneficial ownership is expressly disclaimed.

ITEM 5 OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

Not applicable

ITEM 6 OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

V. Prem Watsa exercises control or direction over 2,100 Subordinate Voting
Shares held by certain members of his family. Such family members have the right
to receive or the power to direct the receipt of dividends from, or the proceeds
from the sale of, such Subordinate Voting Shares.

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.

See attached Exhibit No. 1.

ITEM 9 NOTICE OF DISSOLUTION OF GROUP.

Not applicable

ITEM 10 CERTIFICATION.

Not applicable


                                        8



                                    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
statement is true, complete and correct.

Dated: February 14, 2007                V. Prem Watsa


                                        /s/ V. Prem Watsa
                                        ----------------------------------------


                                        9



                                    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
statement is true, complete and correct.

Dated: February 14, 2007                1109519 Ontario Limited


                                        By: /s/ V. Prem Watsa
                                            ------------------------------------
                                        Name: V. Prem Watsa
                                        Title: President


                                       10



                                    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
statement is true, complete and correct.

Dated: February 14, 2007                The Sixty Two Investment Company Limited


                                        By: /s/ V. Prem Watsa
                                            ------------------------------------
                                        Name: V. Prem Watsa
                                        Title: President


                                       11



                                    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
statement is true, complete and correct.

Dated: February 14, 2007                810679 Ontario Limited


                                        By: /s/ V. Prem Watsa
                                            ------------------------------------
                                        Name: V. Prem Watsa
                                        Title: President


                                       12



                                  EXHIBIT INDEX



EXHIBIT NO.   DESCRIPTION
-----------   -----------
           
1             Members of filing group

2             Joint Filing Agreement dated as of February 14, 2007 among V. Prem
              Watsa, 1109519 Ontario Limited, The Sixty Two Investment Company
              Limited and 810679 Ontario Limited



                                       13