2013
$500M
from 8 investors over 8 rounds
Helion Energy raised $500M on November 5, 2021
Investors: Capricorn Investment Group and Mithril Capital Management LLC
Helion Energy raised $10M on January 1, 2019
Investors: Capricorn Investment Group
Helion Energy raised $21M on January 1, 2016
Investors: Mithril Capital Management LLC and Capricorn Investment Group
Helion Energy raised $5M on October 1, 2015
Investors: U.S. Dept. of Energy Advanced Research Projects Agency-Energy (ARPA-E)
Helion Energy raised $1.5M on August 14, 2014
Investors: Y Combinator and Mithril Capital Management LLC