Jan De Nul ramps up subsea cable investment as turnover hits record €4.24bn

Installing Subsea Cables Jan De Nul ©


Belgian marine contractor Jan De Nul has announced major new investment in subsea cable installation and protection vessels as the company reported record turnover for the fourth consecutive year.
The company posted turnover of €4.24 billion in 2025, up 6% year-on-year, while EBITDA rose to €812 million and net profit increased 12% to €458 million.
Jan De Nul said maritime activities, including offshore wind construction and subsea cable installation, accounted for 74% of total turnover.
The company is continuing a major expansion of its offshore transmission fleet, with two XL cable-laying vessels - Fleeming Jenkin and William Thomson, due to enter service in 2026. Jan De Nul said both vessels will carry 28,000 tonnes of cable.
A new rock installation vessel, George W. Goethals, is also under development to support the protection of subsea cables and offshore wind foundations, primarily in the North Sea and Southeast Asia.
Jan De Nul said it installed 400km of subsea cable and contributed to 20 offshore wind farms during 2025. The company is also involved in the construction of Belgium’s Princess Elisabeth Island energy hub in the North Sea.
CFO Jan Neckebroeck said growing demand for energy security and grid interconnection is driving investment in offshore transmission infrastructure.
“The increasing focus on securing energy stability is driving regions across the globe to build a more balanced energy mix and to interconnect national and regional power networks,” he said.

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