With the latest round of funding, Helion has raised over $1 billion in capital since it was founded in 2013. The company claims that it will build the world's first nuclear fusion power plant by 2028 and has already secured a purchase agreement from Microsoft which is a major investor in Mr Altman's OpenAI.

Helion's unorthodox approach to fusion power and relative secrecy has earned it plenty of fans — and critics. But don’t count its investors among the naysayers.

Building a working nuclear fusion reactor has proven to be a daunting challenge even for multiple wealthy nations, as we've seen with the much-delayed ITER project. However, a private start-up called Helion thinks it can build one and start supplying energy by 2028 by taking a different approach than other reactors.

Seattle-area company Helion Energy gets $425 million from investors including Sam Altman and Softbank to pursue clean energy's "Holy Grail."

Helion’s nuclear fusion promises have garnered the attention of Silicon Valley—and raised concerns amongst scientists wary of its aggressive timeline.

A nuclear fusion startup backed by OpenAI founder Sam Altman has raised nearly half a billion dollars to build what it hopes to be the world’s first power plant using the next-generation energy source. US-based Helion Energy recently unveiled its latest prototype in Everett, Washington, before announcing a $425 million funding round this week.

According to TechCrunch, Helion will use its $425 million funding round to upgrade its manufacturing capabilities. The company currently relies on external suppliers to provide it with capacitors, a type of energy storage device. Helion hopes that moving capacitor manufacturing in-house will enable it to significantly speed up production.

Helion, a fusion energy company, today announced a $425 million Series F investment round that will be used to scale commercialization efforts for the company’s groundbreaking fusion technology. The oversubscribed and upsized round had participation from new investors,

Microsoft-backed startup now valued at $5.4B Fusion energy startup Helion has yet to prove it can generate electricity, but that hasn't stopped investors from dumping another $425 million into the venture.

Helion, a leading innovator in fusion energy technology, has announced receiving a fresh $425 million in funding. This significant investment will enable Helion to expedite the development of its commercial-scale fusion power plant.