Seaspan Brand Guidelines: A 2000 Containership Lessor, Atlas Corp & a 2023 Take-Private

A lessor that owns ships and charters them to the lines.

Seaspan is a containership owner and lessor: it buys ships and charters them, mostly on long-term contracts, to the lines that run container services. The Maritime Executive wrote in March 2026 that Seaspan “was started in 2000,” and the company’s own milestones open in the same year with the founding of Seaspan Ship Management, followed in 2004 by Seaspan Crew Management. In its early years, the same Maritime Executive report said, Seaspan worked mostly with COSCO Shipping and Yang Ming, which together accounted for about 60 percent of its operations; by 2023 its customers also included ONE, ZIM, MSC and CMA CGM.

The company listed on the New York Stock Exchange in 2005, according to its milestones page. In 2018, the same page says, it completed the purchase of Greater China Intermodal Investments, and the insurance and investment group Fairfax Financial Holdings made its first investment in the company. In 2020 a new parent, Atlas Corp., was set up above Seaspan. gCaptain reported in March 2023 that Atlas also owned APR Energy, which supplies mobile power plants, so Seaspan became the shipping arm of a wider infrastructure holding company.

The name needs care. English Wikipedia describes a separate company, Seaspan ULC, a tug, barge, ferry and shipyard group on Canada’s Pacific coast that is part of The Washington Companies. It shares a name and a Vancouver presence with the containership lessor, but it is a different business with its own fleet and yards; this guide is about Seaspan Corporation, the owner of container ships.

SAVER designs, dual-fuel ships and a fleet of more than 240.

Seaspan does not run liner services of its own, so its public face is its fleet. In April 2024 gCaptain reported an operating fleet of 153 vessels at the end of 2023, with 36 more under construction. By March 2026, gCaptain reported, citing company data, the fleet had reached 241 vessels with more than 2.5 million TEU of capacity, in sizes from about 2,500 TEU to 24,000 TEU, and about 7,100 shore-based and seagoing staff. The Maritime Executive described Seaspan in August 2025 as the largest independent containership leasing company.

The company puts its own design work forward. Its milestones page credits the SAVER design concept, first delivered in 2014, and says it had passed 500 upgrades and retrofits under its SAVER programme by 2025. From 2023 it began taking delivery of LNG dual-fuel ships, starting with the 15,000 TEU ZIM Sammy Ofer. In April 2024 gCaptain reported a deal with Hapag-Lloyd to convert five 10,000 TEU ships, among them the Seaspan Amazon and Seaspan Yangtze, to dual-fuel engines able to run on methanol, with MAN Energy Solutions doing the work, before long-term charters to Hapag-Lloyd.

The fleet has also widened beyond boxes. Seaspan says it took its first pure car and truck carrier in 2025 and the first of six 10,800 CEU LNG dual-fuel car carriers in 2026, and that in 2026 it ordered gas carriers and open-hatch bulk carriers. In August 2025 The Maritime Executive reported an order with China State Shipbuilding’s Hudong-Zhonghua yard for twelve 9,000 TEU ships due by 2029. Awards on its milestones page include a 2019 Navis Inspire award for its SAVER designs and two GREEN4SEA awards, in 2023 for an ammonia dual-fuel ship design and in 2024 for its ESG programme.

Hulls, boxes and quays.

Container lines, box lessors and port operators sell capacity rather than consumer products, and they present themselves mostly to shippers, carriers, investors and job seekers. Their identities travel on large objects. A line’s colours and name are repeated on hulls, on the containers it owns and on terminal equipment. Corporate photography tends to show ships at sea, stacked containers and cranes over quays, often lit at night.

Websites carry much of the practical work. Carriers publish schedules, route maps and booking or tracking tools; lessors such as Triton run sales portals, product sheets and pages on container conditions; terminal operators list their ports, berths and services. Fleet pages and dated timelines matter a great deal: Seaspan’s site, for example, sets out its history as a year-by-year list of ship deliveries, designs and orders.

Fuel and emissions now have pages of their own. Shipowners and lines describe dual-fuel ships, retrofits and new fuels such as LNG and methanol, usually in their own words and with their own figures, alongside sustainability reports and the certificates and policies they choose to publish. Those pages are statements by the companies, and this guide reports them as such.

Ownership changes often. Many companies in this group were formed by merger, are owned by infrastructure or private-equity investors, or are partly held by the carriers they serve, and their annual reports, preference shares and investor pages remain public even after a take-private. This guide sets out what can be checked about each company — when it was founded, who owns it and how it describes its business — and marks clearly what rests only on its own word.

Poseidon, Atlas and a line as largest shareholder.

Atlas did not stay listed. Under a merger agreement dated 31 October 2022, a consortium called Poseidon Acquisition Corp., formed by affiliates of Fairfax, the Washington family, Atlas chairman David Sokol and the container line Ocean Network Express (ONE), bought the Atlas shares it did not already hold. gCaptain reported the completion on 28 March 2023: Atlas common shares were delisted from the New York Stock Exchange, while its preferred shares kept trading.

Ownership shifted again in 2026. In March, gCaptain and The Maritime Executive reported agreements under which ONE would raise its holding in Poseidon Corp., the parent of Atlas and Seaspan, to just under half, and the shipbuilder Yangzijiang Shipbuilding would take 10 percent. Fairfax announced on 29 May 2026 that it had completed its share sale and kept about 22 percent, and DredgeWire reported in June 2026 that Yangzijiang had completed its purchase, with ONE the largest shareholder. ONE and Seaspan had already formed a technical ship-management company, OneSea Solutions, in November 2024, The Maritime Executive reported. Poseidon is incorporated in the Marshall Islands and tax-resident in the United Kingdom, according to gCaptain.

Seaspan’s website now lists its registered office and its strategic and commercial office in Singapore, with operations offices in Hong Kong, Mumbai and Vancouver and shore teams in cities from Copenhagen and Hamburg to Shanghai. Its chairman, president and chief executive is Bing Chen. The site presents the company through a short list of values, among them ownership, determination and collaboration, a dated milestones timeline, fleet pages, a section on fuel transition and decarbonisation, and its governance documents.

For a design guide, Seaspan shows a shipowner that tells its story through fleet counts, ship designs and a dated timeline rather than through routes and schedules. Compare Ocean Network Express, its largest shareholder, and Triton International, which leases containers rather than ships. For this guide we use a harbour navy and a channel teal with a sans, an unofficial interpretation; no product or logo is reproduced.

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