In his newly built palace near Tokyo, lined by stone statues of Roman emperors and surrounded by an 18-hole golf course, Masayoshi Son was stewing. After declaring for years the imminent arrival of the artificial-intelligence revolution,

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

(Reuters) - Helion, a startup working to generate electricity from nuclear fusion, on Tuesday said it has raised $425 million in venture funding from a group of investors including SoftBank Group's Vision Fund 2.

President Donald Trump talked up a joint venture investing up to $500 billion for infrastructure tied to AI by a new partnership formed by OpenAI, Oracle and SoftBank.

Shares of Cipher Mining were trading higher in the after-hours market following news of a $50 million private investment in public equity deal from SoftBank Group. After the bell Thursday, shares of Cipher Mining rose 19% to trade at $5.60. The stock finished the day's regular session with a 4.4% gain, closing at $4.70.

The initiative announced by President Donald Trump will aim to "secure American leadership in AI" while also creating jobs and economic benefit.

Tech bros have taken to X in an extraordinary public spat to question each other’s financial muscle over Donald Trump’s $800b AI joint venture. Elon Musk said, “they don’t have the money”.

Helion, a startup working to generate electricity from nuclear fusion, on Tuesday said it has raised $425 million in venture funding from a group of investors including SoftBank Group's Vision Fund 2.

SoftBank's investment in OpenAI may position the company as the world's joint-second most valuable private tech firm after SpaceX.

Some of the funding would be used to help cover OpenAI’s $18 billion commitment to the recently announced Stargate project.

Both Meta and Microsoft committed to huge investments in artificial intelligence, despite new Chinese software outperforming American rivals at a lower cost.