Originally published on AI Tech Connect.
What you need to know $1 billion of equity, led by Sequoia Capital, with Sequoia partner Shaun Maguire joining the board — in a company founded roughly three years ago. A separate $200 million credit facility with Erebor Bank as administrative agent, alongside J.P. Morgan, Crescent Cove and Hercules Capital. Debt beside equity, at Series B. The milestone that preceded it: Ward 250 reached self-sustaining criticality on 18 June 2026 — the first time, Valar says, a company has taken a nuclear reactor critical outside a national lab. About a week later, Ward 250 powered an NVIDIA Blackwell GPU. What the money funds is manufacturing, not that reactor: the stated plan is to move from one working unit to producing fleets en masse through vertical integration, including on-site fuel production.…
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