Oceanco Leviathan (Y722): The 364ft Award-Winning Diesel-Electric Mega Yacht (2025)

The Oceanco Leviathan (Y722) is a groundbreaking 364ft (111m) diesel-electric mega yacht delivered in 2025 by the renowned Dutch shipyard Oceanco at their Alblasserdam facility. This award-winning vessel redefines luxury living with its innovative propulsion system, displacement steel hull, and aluminium superstructure, offering an internal volume of 4,970 GT.

Designed by Lateral Naval Architects with interior styling by Mark Berryman Design, Leviathan boasts a massive beam of 58ft and a top speed of 17.6 knots. The yacht is currently associated with owner Gabe Newell and represents a pinnacle of modern superyacht engineering.

Oceanco Leviathan (Y722) — a new mega yacht from Oceanco (launched in Alblasserdam 2025). Leviathan (formerly project Y722) is a 111m/364ft hybrid-electric motor yacht built by Oceanco. The yacht features a displacement steel hull with an aluminium superstructure and a 17.8m beam. Accommodation includes 6 staterooms for up to 12 guests, supported by 43 crew members. Exterior decks use synthetic material instead of traditional teak. Top speed is 17.6 kn with a maximum range of 6,500 nautical miles. Launched in Alblasserdam, Netherlands in August 2025 and delivered in November 2025.

Accommodation and Capacity

Leviathan offers unparalleled space for up to 22 guests across 11 luxurious suites, supported by a dedicated crew of 33 professionals. The accommodation layout ensures privacy and comfort, with the owner's suite and guest cabins designed to maximize the yacht's immense internal volume.

• Guests: Up to 22
• Cabins: 11 suites
• Crew: 33
• Length: 364ft (111m)
• Beam: 58ft (17.8m)