- CEO
- Kenneth Ross
- Full Time Employees
- 409
- Sector
- Industrials
- Industry
- Marine Shipping
- Address
- 36-38, Grand Rue Luxembourg City Luxembourg 1660
- IPO Date
- Apr 13, 2011
- Business
- Siem Industries S.A. (SEMUF) is a diversified holding company that operates through autonomous subsidiaries in offshore energy services, ocean shipping, and financial investments. Its offshore energy services encompass Subsea7's engineering and underwater construction for oil and gas projects and offshore wind farm installations; Siem Offshore's support vessels for offshore activities; and EMGS's electromagnetic surveys for locating and sizing offshore energy fields; while ocean shipping includes refrigerated transportation of fruits, vegetables, and perishable goods, car carriers and RoRo vessels for automobiles and trucks, bulk goods transport, and lease financing via subsidiary Seven Yield; financial investments focus on listed and unlisted shares, bonds, private equity, and risk-adjusted returns from group cash flows, primarily within core sectors. The company also engages in potash production for fertilizers, bischofite and magnesium chloride for construction and de-icing, scientific core-drilling, shipyard construction, and salt-based products including waste storage caverns. Founded in 1980 by Kristian Siem and headquartered at 36-38 Grand Rue in Luxembourg City, Luxembourg, Siem Industries conducts global operations across oil and gas services, renewable energy, marine shipping, mining, and finance, serving long-term clients in energy, agriculture, automotive, and industrial sectors. Recent developments include a February 2025 memorandum of understanding with Eni S.p.A. and CDP Equity S.p.A. supporting the Subsea7-Saipem merger, positioning Siem as the largest shareholder in the resulting entity; EMGS's May 2025 bareboat acquisition of the MV Siem Day vessel from a Siem subsidiary to launch subsea construction; Siem Offshore's November 2024 agreements for fleet management transition to Aurora Offshore with a 40% ownership stake effective Q1 2025; and Seven Yield's November 2024 acquisition of the MV Eurocargo Catania RoRo vessel for delivery in January 2025.