SoftBank Group CEO Masayoshi Son on Monday said he has agreed with OpenAI CEO Sam Altman to set up a joint venture in Japan ...

The deal, if it were to go through, would make the Japanese tech investment fund the largest outside stakeholder in OpenAI, overtaking Microsoft.

From left: Masayoshi Son, chairman and CEO of SoftBank; Larry Ellison, executive chairman of Oracle; and Sam Altman, CEO of OpenAI listen to President Trump speak at the White House on Jan.

Emily Bary is a MarketWatch news editor based in New York. Victor Reklaitis Victor Reklaitis is a Washington Correspondent for MarketWatch. During his time at MarketWatch, he also has served in ...

SoftBank shares surged — on five times the previous day’s volume — on Wednesday after the Japanese investment group landed a starring role in an U.S. artificial-intelligence infrastructure ...

Jan. 21, Trump announced a joint venture with Oracle Chairman Larry Ellison, SoftBank CEO Masayoshi Son and Altman called ...

While the presidential transition commanded headlines this week, equally significant shifts were occurring in AI technology. Just hours before Donald Trump’s inauguration, DeepSeek released its latest ...

Summary. Masayoshi Son, the billionaire founder and CEO of SoftBank, the Japanese media technology conglomerate, is often cast as a dreamer, financial engineer, and speculator. But his career ...

Few characters are more enigmatic or misunderstood than Masayoshi Son, the billionaire founder and CEO of SoftBank, the Japanese media technology conglomerate. In Japan and in western media ...

The Stargate project outlines a commitment to spend $500 billion over the next four years to develop advanced AI ...

Stocks are approaching records in the first couple of days of Trump's presidency, with more pronounced moves in specific ...