Offshore wind installations depend on machines called hydraulic impact hammers, devices that drive steel foundation piles into the seabed so turbines have something to stand on. Cadeler, the Danish jack-up vessel operator, just paid €501m ($578.1m) to buy Menck, the German firm that builds them.
Acteon, a UK-based offshore energy services firm, was the seller. Cadeler funded the acquisition from existing liquidity and a €380m facility arranged jointly by DNB Bank and Coöperatieve Rabobank, and said it intends to replace that facility with longer-term financing and operational cash flow.
What Menck actually makes
Menck's business is fixed-bottom offshore foundations. Its product line covers hydraulic impact hammers, noise mitigation systems, drilling and grouting equipment, and lifting services, all applied to the foundation before a turbine goes anywhere near the water surface. The firm has operated in that space for more than 150 years. Its 4,400kJ hammer is already working on Cadeler's ongoing Hornsea 3 project, which means the commercial relationship predates the ownership transfer.
CEO Mikkel Gleerup said offshore wind projects are increasing in scale and technical complexity, making reliable execution more important. He said the combination pairs Menck's specialist engineering with Cadeler's installation fleet to give customers more integrated coverage across the full installation chain.
Menck stays in the wider market
Menck will operate as a standalone business inside the Cadeler Group, keeping its identity, market relationships, and organisational structure. The arrangement gives Cadeler what it describes as a more integrated approach to the transportation and installation of wind foundations, the combined process of moving large components to site and placing them. Menck will also continue supplying equipment and services to other contractors across the offshore wind sector. Cadeler said that independence is central to the deal.
Cadeler operates one of the largest fleets of jack-up wind installation vessels. In June 2026 it completed installation of 100 Siemens Gamesa turbines at RWE's 1.4 gigawatt Sofia offshore wind farm in the UK North Sea. Cadeler said it expects the acquisition to reduce subcontractor dependency and increase project flexibility, two outcomes it projects for its own operations.