Fairfax Financial Holdings has completed the sale of a significant portion of its stake in Poseidon Corp., the holding company for container shipping giant Seaspan Corporation, generating proceeds of approximately US$1.91 billion and a pretax realized gain of about US$837 million.
The Toronto-listed insurer and its affiliates sold 67,618,981 common shares of Poseidon at US$28.30 per share.
The divested block represented approximately 23.1% of Poseidon's total issued and outstanding common shares. Following the transaction, Fairfax retains an equity ownership of approximately 22.2% and will continue to account for that remaining stake under the equity method of accounting.
The Poseidon sale is the latest example of Fairfax monetizing a non-insurance investment at a substantial gain, a pattern that has defined the company since its founding by Prem Watsa in 1985. Often called the "Canadian Warren Buffett," Watsa built Fairfax around the principle of using insurance float as low-cost, long-term capital to fund opportunistic investments, growing the company from a near-bankrupt trucking insurer into a global insurance and investment powerhouse.
Fairfax's stake in Poseidon was valued at US$2.05 billion in the first quarter of 2025, with the company having supported the privatization of Atlas Corp., Seaspan's former parent, in 2023.
Watsa said the sale price "reflects the achievements and success of the company" since that privatization, while expressing confidence in Poseidon's future as it brings on new strategic partners.
The transaction closes as Fairfax is coming off what it described as its best financial year on record.
For fiscal year 2025, Fairfax reported net earnings of US$4.77 billion, up 23% from 2024, with net premiums written climbing 3.9% to a record US$26.3 billion. The consolidated undiscounted combined ratio across its P&C insurance and reinsurance operations was 93.0%, producing record underwriting profit of US$1.82 billion, supported by net favorable prior year reserve development of US$751.5 million, even as current period catastrophe losses climbed to US$1.24 billion.
The Poseidon proceeds arrive on top of that already-strong financial position, giving Fairfax considerable capital flexibility heading into a period of active deal-making.
The broader significance of the Poseidon transaction lies in what the capital could support domestically and internationally. Northbridge Financial, Fairfax's Canadian P&C arm based in Toronto, remains central to the group's operations.
In 2024, Northbridge posted a combined ratio of 89.3% while writing C$3.5 billion of premium, despite significant catastrophe losses in Canada, earning recognition from Watsa for underwriting excellence.
Fairfax has been actively reshaping its investment portfolio.
In the third quarter of 2025, the company announced an agreement to sell its 80% interest in Eurolife's life insurance operations for approximately US$940 million, while separately committing up to US$1.65 billion to take US real estate company Kennedy-Wilson private.
