Company: FRFXF
Filing Date: 2025-06-17
Form Type: 6-K
Source: 0001104659-25-060308
Chunk: 0

Company: FAIRFAX FINANCIAL HOLDINGS LTD/ CAN
Filing Date: 2025-06-17
Form: 6-K
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

Form 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934</div>

| For the month of: June 2025 |     | Commission File Number: 001-31556 |

<div align='center'>FAIRFAX FINANCIAL HOLDINGS LIMITED
(Name of Registrant)

95 Wellington Street West
Suite 800
Toronto, Ontario
Canada M5J 2N7
(Address of Principal Executive Offices)</div>

Indicate by check mark whether
the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

| Form 20-F ¨ |     | Form 40-F x |

<div align='center'>INFORMATION CONTAINED IN THIS FORM 6-K REPORT</div>

Addition of Co-Obligor to 4.73% Senior Notes due 2034 and 5.23% Senior Notes due 2054

On June 17, 2025, Fairfax
Financial Holdings Limited (the “”) added Brit Group Holdings Limited, a company incorporated under the
laws of England and Wales (“”), as a co-obligor of the Corporation’s outstanding series of (i) 4.73%
senior notes due 2034 (CUSIP / ISIN Nos. 303901 BT8 / CA303901BT89) (the “”), of which C$450 million aggregate
principal amount was issued on November 22, 2024, and (ii) 5.23% senior notes due 2054 (CUSIP / ISIN Nos. 303901 BS0 / CA303901BS07)
(the “” and, together with the 2034 Notes, the “”), of which C$250 million aggregate
principal amount was issued on November 22, 2024. Brit is the Corporation’s wholly owned UK-based holding company that, through
its subsidiaries, is a market-leading global Lloyd’s of London specialty insurer and reinsurer.

The addition of Brit as a
co-obligor was effected by entry into a seventh supplemental indenture (the “”) by and
among the Corporation, Brit, The Bank of New York Mellon (“”), as U.S. Trustee, and Computershare Advantage Trust
of Canada (“”),