Paris, April 14th 2025. Aldebaran Capital Partners, an independent management company dedicated to the complex transformation of small-and-mid-sized companies in France, has entered into exclusive negotiations with Vallourec for the acquisition of Serimax.

Serimax, global leader in mechanized welding services, supports its international clients in the execution of critical projects. The group is involved from the engineering phase to execution, providing customized equipment and on-site technical support. With around 600 employees across 12 countries worldwide, with a strong presence in France (Roissy-en-France and Villers-Cotterêts), Serimax generated c.€105 million in revenue in 2024.

Edouard Lesieur, Partner at Aldebaran: “We are pleased to support the Serimax teams in this new phase of development. In a world where the shortage of welders has become critical, we have been particularly impressed by Serimax’s expertise and the international ambitions of its management team. Our investment thesis is to capitalize on the cutting-edge expertise developed by the company, to continue diversifying its activities into new promising Energy transition markets such as nuclear and hydrogen.”

This new investment highlights Aldebaran’s expertise in executing complex carve-outs from large groups, with a particular focus on industry and services to industry.

Guillaume Graindor, Managing Director of Serimax: “This carve-out from the Vallourec group marks the effective restart of a great entrepreneurial journey which will allow us to accelerate our growth projects. Serimax, undisputed worldwide reference in its domain, brings top-level expertise to address challenges related to the energy transition. Aldebaran’s experience in carve-outs made them the ideal partner we wanted to team up with.”

The proposed transaction is still subject to the usual conditions for this type of operation and is expected to be finalized before summer 2025.