DayOne Data Centers has secured a mezzanine financing facility totaling €500 million, with the option to expand the facility to as much as €1 billion, subject to mutual agreement, in a transaction anchored by global investment firm Brookfield alongside a global sovereign investor. The financing strengthens DayOne’s long-term capital structure and supports the continued expansion of its hyperscale data center platform across Finland and additional international markets.
The facility carries a seven-year tenor and is secured against DayOne’s Finland platform. Proceeds will initially support the development and rollout of hyperscale data center projects in Lahti and Kouvola, while also providing the flexibility to allocate capital toward other strategic growth markets as demand for AI-driven and cloud infrastructure continues to accelerate globally.
The transaction adds to the company’s existing capital base, which includes approximately US$1.9 billion raised across its Series A and Series B equity rounds. In August 2025, DayOne announced a €1.2 billion investment commitment in Lahti, and together with its joint-venture hyperscale development in Kouvola, the company is advancing nearly 300 megawatts of planned data center capacity across Finland.
DayOne, headquartered in Singapore, continues to expand its global footprint through a development pipeline spanning Singapore, Malaysia, Indonesia, Thailand, Japan, Hong Kong, and Finland. The mezzanine financing enhances the company’s ability to execute large-scale build-outs while maintaining strategic flexibility to support organic growth and new-build programs across multiple regions.
Brookfield’s participation reflects its continued focus on digital infrastructure investments and its ability to provide flexible, large-scale capital solutions to operators supporting the rapid growth of AI and cloud computing workloads. The involvement of a sovereign investor further highlights institutional confidence in DayOne’s governance, platform quality, and long-term growth strategy.
KEY QUOTES:
“The Brookfield facility strengthens DayOne’s long-term capital base and supports the continued build-out of our global platform. 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,”
Jamie Khoo, Chief Executive Officer, DayOne
“Brookfield is uniquely positioned to provide flexible, large-scale financing solutions for high-quality operators like DayOne that are enabling the global shift toward AI and cloud-driven data demand given our experience in digital infrastructure. We’re delighted to support DayOne’s expansion with this milestone transaction,”
Sean Robertson, Infrastructure Debt Senior Vice President, Brookfield
