Building the world's first fusion power plant.
108 jobs at Helion Energy
Nov 2021 · Sam Altman
Sep 2020 · Dustin Moskovitz
Jan 2019 · Capricorn Investment Group
Jul 2015 · Mithril Capital Management
Aug 2014 · Mithril Capital Management and Y Combinator
Founders
Co-founder
Co-founder & CTO
Co-founder & CEO
Co-Founder & Chief Scientist / Principal Scientist
Co-founder
Investors
Helion Energy · Jun 2026
Major Series G financing led by Thrive Capital at a $15.5 billion post-money valuation; total invested in Helion reached about $1.5 billion.
Reuters · Jul 2025
Reuters reported Helion began construction on its Orion fusion plant in Malaga, Washington, intended to supply Microsoft data centers by 2028.
Helion Energy · Jan 2025
Helion announced an oversubscribed Series F round of $425 million at a $5.425 billion post-money valuation.
Helion Energy · Sep 2023
Helion and Nucor announced a first-of-its-kind collaboration and investment to deploy a 500 MWe fusion power plant for industrial decarbonization.
Reuters · May 2023
Reuters reported Microsoft signed the industry’s first fusion power purchase agreement with Helion, targeting electricity delivery around 2028.