SIEM OFFSHORE NEW DL 1

Sea1 Offshore Inc., together with its subsidiaries, owns and operates offshore support vessels for the offshore energy service industry. The company operates through Subsea Vessels; Anchor-Handling Tug Supply (AHTS) Vessels; Platform Supply Vessels (PSVs); Fast Crew & Oil Spill Recovery Vessels; and Other segments. It provides offshore vessel activities, such as anchor handling and towing, platform supply, oil spill recovery, well intervention services, and subsea operations. As of March 2026, the companies fleet comprised of 15 vessels, including one offshore subsea construction vessel, two well-intervention vessels, six anchor handling, tug and supply vessels, two platform supply vessels, four fast crew, and oil spill recovery vessels. It operates in the North Sea, Brazil, Australia, Canada, Southeast Asia, South America and West Africa. The company was formerly known as Siem Offshore Inc. and changed its name to Sea1 Offshore Inc. in May 2024. Sea1 Offshore Inc. was founded in 2005 and is headquartered in Kristiansand, Norway.