Topic
The field focused on harnessing controlled nuclear fusion to generate electricity, covering reactor design, plasma physics, and related startups.
London startup Zenithon AI has raised $10 million to train world models meant to replace slow physics simulations in fusion, rocketry and chip design. The company says its models check a million designs in the time one conventional simulation takes, with fusion energy developers among its early customers.
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Investors have put more than $6 billion into nuclear fission and fusion startups in 2026, a record by Crunchbase's count. The IPO market those investors would one day sell into has marked most recent nuclear listings far below their peaks.
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Xcimer took investment from RTX Ventures and Pacific Fusion signed an agreement with the NNSA. TechCrunch's reporting shows defense interest landing on machines that already exist, with both plant programs still running.
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Proxima Fusion is building its own supplier for the superconducting tape its magnets depend on. Lower Saxony is co-funding what would be the first plant of its kind in Germany and Europe.
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Hyundai Motor Group's money closed inside a $1 billion raise at Commonwealth Fusion Systems, and the engineering work on ARC power stations is still described as something the two companies will explore. The amount and the scope were not disclosed.
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PPPL's framework closes a full control loop in about 20 milliseconds, which gives it roughly ten passes of warning before the instability it predicted would have arrived, on a real tokamak in five experiments.
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Five experiments on the DIII-D tokamak let learned models predict plasma behaviour and command the heating, while error checking, conflict resolution and hardware limits stayed in stages where nothing was learned.
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The company reports repeatable 100,000-atmosphere compression without superconducting magnets. The megawatt labels on its modules come from a per-pulse model, and the shot rate they imply is arithmetic you have to do yourself.
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Google committed to 200 MW from Commonwealth Fusion's first plant and RWE put EUR 25m behind Proxima Fusion next to a shut-down reactor site, deals where the access mattered more than the valuation. Only one of them involves a signed purchase.
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Ground broke on August 25 on a $1 billion, 156-module pulsed machine aiming at net facility gain by 2030. The commercial gap is five times the output and 86,400 shots a day.
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The startup says crystal growth now takes 30 minutes instead of up to a week, and a whole pellet two to three hours. Nine of its ten stated barriers remain.
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The lab's case for spherical tokamaks rests on shape, beta and less steel. The compute needed to search that design space is not costed anywhere in the material.
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