6-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION****Washington, D.C. 20549

Form 6-K

Report of Foreign Private IssuerPursuant to Rule 13a-16 or 15d-16 ofthe Securities Exchange Act of 1934

FAIRFAX FINANCIALHOLDINGS LIMITED

(Name of Registrant)

95 Wellington Street WestSuite 800

Toronto, Ontario

Canada M5J 2N7

(Address of Principal Executive Offices)

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

EXHIBIT INDEX

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 99.1

FAIRFAX News Release

TSX Stock Symbol: FFH and FFH.U

TORONTO, May 29, 2026

FAIRFAX COMPLETES SALE OF PORTION OF ITS INTERESTIN POSEIDON CORP.

Fairfax Financial Holdings Limited (TSX: FFH and FFH.U) announced today that it, together with certain of its affiliates (collectively, “Fairfax”), has completed the previously announced sale of an aggregate of 67,618,981 common shares (the “Shares”) of Poseidon Corp. (“Poseidon”), the holding company that owns Seaspan Corporation, at a price of US$28.30 per share, for aggregate proceeds of approximately US$1.91 billion and a pre-tax realized gain of approximately US$837 million.

Following the sale of the Shares, which represent approximately 23.1% of the total issued and outstanding common shares of Poseidon, Fairfax retains an equity ownership of approximately 22.2% and will continue to account for its remaining investment in the common shares of Poseidon under the equity method of accounting.

About Fairfax

Fairfax Financial Holdings Limited is a holding company which, through its subsidiaries, is primarily engaged in property and casualty insurance and reinsurance and the associated investment management.

Fairfax Financial Holdings Limited’s head and registered office is located at 95 Wellington Street West, Suite 800, Toronto, Ontario, M5J 2N7.

Certain statements contained herein may constitute “forward-looking statements” and are made pursuant to the “safe harbour” provisions of applicable Canadian andU.S. securities laws. Such forward-looking statements are subject toknown and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Fairfax tobe materially different from any future results, performance or achievements expressed or implied by such forward-looking statements.Such factors include, but are not limited to: our ability to complete acquisitions and other strategic transactions on the terms and timeframes contemplated, and to achievethe anticipated benefits therefrom; a reduction in net earnings if our loss reserves are insufficient; underwriting losses on the riskswe insure that are higher than expected; the occurrence of catastrophic events with a frequency or severity exceeding our estimates; changesin market variables, including unfavourable changes in interest rates, foreign exchange rates, equity prices and credit spreads, whichcould negatively affect our operating results and investment portfolio; the cycles of the insurance market and general economic conditions,which can substantially influence our and our competitors’ premium rates and capacity to write new business; insufficient reservesfor asbestos, environmental and other latent claims; exposure to credit risk in the event our reinsurers fail to make payments to us underour reinsurance arrangements; exposure to credit risk in the event our insureds, insurance producers or reinsurance intermediaries failto remit premiums that are owed to us or failure by our insureds to reimburse us for deductibles that are paid by us on their behalf;our inability to maintain our long term debt ratings, the inability of our subsidiaries to maintain financial or claims paying abilityratings and the impact of a downgrade of such ratings on derivative transactions that we or our subsidiaries have entered into; risksassociated with implementing our business strategies; the timing of claims payments being sooner or the receipt of reinsurance recoverablesbeing later than anticipated by us; risks associated with any use we may make of derivative instruments; the failure of any hedging methodswe may employ to achieve their desired risk management objective; a decrease in the level of demand for insurance or reinsurance products,or increased competition in the insurance industry; the impact of emerging claim and coverage issues or the failure of any of the losslimitation methods we employ; our inability to access cash of our subsidiaries; an increase in the amount of capital that we and our subsidiariesare required to maintain and our inability to obtain required levels of capital on favourable terms, if at all; the loss of key employees;our inability to obtain reinsurance coverage in sufficient amounts, at reasonable prices or on terms that adequately protect us; the passageof legislation subjecting our businesses to additional adverse requirements, supervision or regulation, including additional tax regulation,in the United States, Bermuda, Canada or other jurisdictions in which we operate; risks associated with applicable laws and regulationsrelating to sanctions, anti-money laundering and corrupt practices in Canada and in foreign jurisdictions in which we operate; risks associatedwith government investigations of, and litigation and negative publicity related to, insurance industry practice or any other conduct;risks associated with political and other developments in foreign jurisdictions in which we operate; risks associated with legal or regulatoryproceedings or significant litigation; failures or security breaches of our computer and data processing systems; the influence exercisableby our significant shareholder; adverse fluctuations in foreign currency exchange rates; our dependence on independent brokers over whomwe exercise little control; financial reporting risks relating to deferred taxes associated with amendments to IAS 12 – Income Taxes;impairment of the carrying value of our goodwill, indefinite-lived intangible assets or investments in associates; our failure to realizedeferred income tax assets; risks associated with Canadian or foreign tax laws, or the interpretation thereof; technological or otherchange that adversely impacts demand, or the premiums payable, for the insurance coverages we offer; disruptions of our information technologysystems; assessments and shared market mechanisms that may adversely affect our insurance subsidiaries; risks associated with economicdisruptions from global conflicts and the development of other geopolitical events worldwide; and risks associated with tariffs, traderestrictions, or other regulatory measures imposed by domestic or foreign governments that may, directly or indirectly, affect our business.Additional risks and uncertainties are described in our most recently issued Annual Report which is available at www.fairfax.ca and onSEDAR+ at www.sedarplus.ca and on EDGAR at www.sec.gov, and in our base shelf prospectus (under “Risk Factors”) filed withthe securities regulatory authorities in Canada, which is available on SEDAR+ at www.sedarplus.ca. Fairfax disclaims any intention orobligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, exceptas required by applicable securities law.