Helion Energy
Fusion · United States · Founded 2013 · private
Helion Energy ran its Polaris prototype at 150 million °C in January 2026, the first privately funded machine to do bulk deuterium-tritium fusion, and is building Orion in Malaga, Washington to sell Microsoft power from 2028.
The record
3 figures · 2 rounds · 12 backers · 5 feed items
Every one of them carries its source, its date, and its age when it has one. Reading the record takes a free account; the account is how you keep a watchlist.