Sea1 Offshore Inc., together with its subsidiaries, owns and operates offshore support vessels for the offshore energy service industry and offshore renewables market. It operates platform supply vessels; anchor-handling tug supply vessels; subsea vessels; fast crew and oil spill recovery vessels, and other segments. The company has a fleet of 26 vessels, which includes six platform supply vessels, four offshore subsea construction vessels, two well-intervention vessels, one scientific core drilling vessel, nine anchor handling tug supply vessels, and four fast crew and oil spill recovery vessels. It operates in Norway, North Sea, Brazil, Australia, Canada, Northern Pacific Ocean, Southeast Asia, and 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.