Sea1 Offshore Inc. is a Norwegian company that specializes in offshore support vessel services for the energy sector. Established in 2005 and headquartered in Kristiansand, Norway, the company operates globally with offices in Canada, Australia, and Brazil. Sea1 Offshore owns and operates a fleet of 23 modern vessels, including Anchor Handling Tug Supply (AHTS) vessels, Platform Supply Vessels (PSVs), Offshore Subsea Construction Vessels, Well-Intervention Vessels, and Fast Crew and Oil Spill Recovery Vessels. Services provided include anchor handling and towing, platform supply, oil spill recovery, well intervention, and subsea operations. In 2025, the company reported revenues of $271.55 million, a decrease from $340.83 million in the previous year. As of March 2026, Sea1 Offshore employed 756 individuals. The company is listed on the Oslo Børs Exchange under the ticker symbol SEA1 and was formerly known as Siem Offshore Inc. until its name change in May 2024.
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Sea1 Offshore's offering is currently listed on EURONEXT. The expected date is Dec 18, 2025. The proposed ticker is SEA1. Sea1 Offshore is headquartered in Cayman Islands. It is classified under Energy.
The dates below are calculated from widely-used industry conventions, not from this offering's own disclosed terms — DiscoverIPO does not have a structured source for the actual figures. Treat them as reference points, not confirmed dates.
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Sea1 Offshore is expected to list on Dec 18, 2025.
Sea1 Offshore is listing on EURONEXT.
Sea1 Offshore's proposed ticker is SEA1.
Sea1 Offshore Inc. is a Norwegian company that specializes in offshore support vessel services for the energy sector. Established in 2005 and headquartered in Kristiansand, Norway, the company operates globally with offices in Canada, Australia, and Brazil. Sea1 Offshore owns and operates a fleet of 23 modern vessels, including Anchor Handling Tug Supply (AHTS) vessels, Platform Supply Vessels (PSVs), Offshore Subsea Construction Vessels, Well-Intervention Vessels, and Fast Crew and Oil Spill Recovery Vessels. Services provided include anchor handling and towing, platform supply, oil spill recovery, well intervention, and subsea operations. In 2025, the company reported revenues of $271.55 million, a decrease from $340.83 million in the previous year. As of March 2026, Sea1 Offshore employed 756 individuals. The company is listed on the Oslo Børs Exchange under the ticker symbol SEA1 and was formerly known as Siem Offshore Inc. until its name change in May 2024.
Euronext's IPO showcase — a record of companies that have already listed, not an advance-notice feed. Retrieved Aug 3, 2026.
View the original filing on Euronext →Not investment advice. DiscoverIPO is an informational database. Nothing here is a recommendation to buy or sell any security, and no content should be relied on as financial advice. All figures come from public securities-regulator filings, may be incomplete or out of date, and should be verified against the original source before you act on them.
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