Pure Data Centres, the Oaktree Capital-backed London-headquartered developer, has signed Microsoft to lease capacity at its planned 550MW data center campus in Seinäjoki, Finland. The project, designated SJK01, carries a total projected investment of €7.5 billion ($8.55 billion). Phase 1 will deliver 110MW of AI-focused capacity at a cost of over €1.5 billion ($1.7 billion), with the substation already constructed and operational, and all planning permissions and power requirements secured; Phase 1 is already fully leased. The full campus is designed to scale to 550MW+ across 370 acres, using repeatable 40MW AI-ready modules with direct-to-chip liquid cooling and waste heat recovery for district heating. Construction across all phases is expected to span a decade and generate approximately 3,000 construction jobs in the South Ostrobothnia region. Pure DC secured $2.7 billion in financing in May 2026, led by SMBC, Allianz Global Investors, and ABN AMRO, largely against its Dublin and Amsterdam campuses.