Seaspan Corp is expanding its massive containership newbuilding programme with an order for six more neo-panamaxes.

The shipowner's parent company, New York-listed Atlas Corp, announced that an unnamed shipyard will build the 15,000-teu scrubber-fitted vessels, which will be delivered in the first and second quarters of 2024.

They will be financed from additional borrowings as well as cash on hand and will, on delivery, begin long-term charters with a leading liner company.