European data center firm Conapto is expanding one of its data centers in Stockholm, Sweden.

The Nordic operator this week announced an expansion of its Stockholm 4 South data center, increasing its capacity with an additional 8MW of power from energy company Ellevio. Taking the site to 28MW, the new power capacity will be ready from January 2026.

“Digitalization and AI are changing the way data is used around the world, and this expansion ensures our customers have the reliable and sustainable infrastructure to grow,” said Håkan Björklund, CEO of Conapto. “Adding 8MW at Stockholm 4 South is about more than capacity. It’s about ensuring resilience, efficiency, and climate-smart operations for the future.”

Conapto broke ground on Stockholm 4 in October 2022. The site was originally set to offer 8,000 sqm (86,100 sq ft) and 24MW at full build-out. The facility launched last year.

The Conapto business has roots back in 1982, when it was founded as Backupcentralen, which Sungard Availability Services bought in 2002. Sungard AS sold off its Swedish subsidiary to Segulah Fund V in 2018, which founded Conapto. European investment fund Marguerite acquired the company in 2021.

Swedish energy firm Ellevio is owned by pension fund managers AMF, Folksam, OMERS Infrastructure, and the Third Swedish National Pension Fund (AP3).

“Expanding the capacity of Conapto’s data center is not just a technical step; it’s a critical aspect of securing a sustainable future. The AI innovations and digital services shaping our lives depend on the electrified infrastructure that both Conapto and Ellevio deliver. This expansion marks a milestone in our shared mission,” said Ellevio’s Tomas Brunzell.