DayOne Data Centers, a Singapore-based hyperscale infrastructure operator, has secured a mezzanine financing facility of €500 million ( US$582 million ), expandable to €1 billion, backed by global investment manager Brookfield and a global sovereign wealth investor.

The bespoke seven-year facility is secured against DayOne’s Finland data centre platform and marks a significant capital step for its expansion in Northern Europe.

It will fund the development of new hyperscale campuses in Lahti and Kouvola, key nodes in Finland’s emerging digital infrastructure corridor, while retaining the option to channel capital to other growth markets in Asia-Pacific and beyond.

This deal bolsters DayOne’s long-term funding base, adding depth to the US$1.9 billion it previously raised across Series A and B equity rounds. It follows the company’s €1.2 billion investment commitment in Lahti earlier this year, and a joint-venture development in Kouvola, together totalling nearly 300 megawatts of planned capacity.

“The Brookfield facility strengthens DayOne’s long-term capital base and supports the continued build-out of our global platform,” says DayOne chief executive officer Jamie Khoo.

“It aligns with the scale and pace of digital infrastructure our customers require and reflects the confidence our investors, including Brookfield, have in our strategy and execution. With Finland as the initial borrower, it marks another important step in advancing our development across multiple markets.”

For Brookfield, the transaction aligns with its long-standing digital infrastructure thesis. Last month, Brookfield announced the launch of a US$100 billion global AI Infrastructure programme in partnership with Nvidia and the Kuwait Investment Authority.

Brookfield will anchor the programme with the Brookfield Artificial Intelligence Infrastructure Fund ( BAIIF ).

Photo: A 3D rendering of the proposed hyperscale data centre campus in Lahti, Finland. ( DayOne )