The scale-up comes in response to NEXTDC’s pro forma contracted utilisation (the total power capacity signed up by customers) rose by roughly 60% to 667MW as of the end of March 2026, compared with mid-December 2025.
The data centre operator raised its fiscal 2026 capital expenditure by A$300 million to A$2,700 million to A$3,000 million, it said, demonstrating investment in faster inventory build-out and equipment procurement for the S4 facility.
Located in Horsley Park, S4 is expected to have a capacity of 350MW.
“This is a unique opportunity to materially expand NEXTDC’s contracted capacity and de-risk the company’s Western Sydney developments ahead of potential strategic partnership transactions with private capital partners from 2027,” said CEO and Managing Director Craig Scroggie, as reported by Reuters.
Canada’s La Caisse has also committed an additional A$700 million, following its initial A$1 billion pledge earlier this month to support continued development of key data centre assets and future capacity expansions. The extra capital is expected to position NEXTDC to accelerate the delivery of next-generation AI-ready infrastructure at scale.
NEXTDC said its series of announcements in April 2026 marks a “pivotal inflection point”, particularly as unprecedented demand from hyperscale and AI customers drives a change in contracted capacity.
“Supported by a strengthened capital position and expanded funding program, NEXTDC is accelerating development across its portfolio to capture this structural growth opportunity,” the company explained on its website.
NEXTDC said it now continues to evaluate capital partnership structures for its Western Sydney developments with third-party investors.
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