Helion Energy, a United States-based fusion energy company, has secured US$425 million in its series F funding round.

New investors in this funding round include Lightspeed, SoftBank Vision Fund 2, and a major university endowment.

Existing investors like Sam Altman, Mithril Capital, Capricorn Investment Group, Good Ventures Foundation, and Nucor also participated.

The company plans to use the capital to expand its manufacturing capabilities in the United States. This will also focus on producing components such as capacitors, magnets, and semiconductors.