Summary
- IREN has completed the acquisition of Ingenostrum, known as Nostrum Group, marking its entry into Europe.
- The transaction adds about 490MW of secured, grid connected power in Spain and a team of more than 50 people.
- The deal shows how Spanish sites with credible power positions are drawing interest from AI infrastructure investors.
IREN has completed its acquisition of Spanish data centre developer Ingenostrum, known as Nostrum Group, giving the company about 490MW of secured, grid connected power in Spain.
The deal marks IREN’s entry into Europe and gives it a local development platform in a market where AI infrastructure demand has raised the value of sites with credible power access. Nostrum’s operations will continue under the IREN brand.
Nostrum brings more than 50 people across development, engineering, construction, and operations. That local capability is important because European data centre projects now depend on land control, grid rights, permitting, substations, design, procurement, construction management, and energisation.
Spain has become a power market as much as a property market
Spain has become one of Europe’s most active data centre development markets, helped by renewable energy resources, improving fibre connectivity, available land in selected regions, and growing investor interest.
Madrid remains Spain’s main data centre market, but developers are also testing locations in Extremadura, Castile La Mancha, Aragón, the Basque Country, Galicia, and Murcia. Many of those regions are being assessed because they may offer larger sites and clearer routes to power than the most congested European hubs.
IREN is not buying a simple landbank through the Nostrum deal. It is buying a development business with secured grid connected power and people who understand the Spanish permitting, engineering, and construction environment.
The distinction is important because a data centre site with fibre, land, and customer interest can still stall if the grid connection is uncertain or depends on delayed reinforcement works. A project with a stronger power position, permitting progress, and local delivery capability is more useful to customers and lenders.
AI demand changes the development model
IREN’s background in vertically integrated digital infrastructure, including large scale data centres and GPU clusters, gives the transaction a different shape from a conventional property acquisition. The company is using development control to support compute capacity, rather than relying only on third party colocation supply.
That model has become more attractive as AI workloads require larger blocks of power, denser electrical designs, and faster deployment. Operators and compute providers want to secure sites before competing projects absorb the available grid capacity.
Spain’s renewable profile is part of the appeal, but it does not remove the delivery risk attached to large campuses. Developers still need grid studies, connection agreements, substation delivery, environmental permits, cooling strategies, water assessments, transformer supply, switchgear procurement, and customer commitments.
The transaction also points towards further acquisition activity in Europe. Data centre platforms with grid secured land and local delivery teams are likely to interest infrastructure funds, hyperscale partners, AI compute providers, and listed digital infrastructure companies.
IREN now has a Spanish platform in a market with room for growth, although the value of the acquisition will depend on execution. The company must convert secured power and development expertise into permitted, built, cooled, and energised facilities before the pipeline becomes real operating capacity.
