Masayoshi Son founded SoftBank in 1981. It has invested millions in some of Silicon Valley's biggest tech companies.

Microsoft (MSFT.O) has announced that it changed some key terms of a deal with OpenAI after the ChatGPT creator announced a joint venture with Oracle (ORCL.N) and Japan’s SoftBank Group (9984.T) to build up to $500 billion of new AI data centers in the United States.

Microsoft is OpenAI's largest investor, with a 49% stake, translating to $14 billion. As part of its complicated partnership with the ChatGPT maker, Microsoft was once the exclusive cloud computing partner for OpenAI. However, OpenAI's $500 billion investment in computing infrastructure changes its relationship with Microsoft.

Masayoshi Son, the Japanese tycoon helming US President Donald Trump's big new AI push, is the son of an immigrant pig farmer with a spectacular but also sketchy investment record.

Microsoft confirms its partnership with OpenAI remains intact despite OpenAI's new venture with Oracle and SoftBank, led by SoftBank CEO Masayoshi Son

“I am Masayoshi Son, and SoftBank is not a bank ... Big U.S. technology companies, including Alphabet, Meta, Microsoft, Nvidia and Amazon are set to spend more than $1 trillion in coming ...

Two of the most powerful tech leaders in the world, Microsoft CEO Satya Nadella and Tesla CEO Elon Musk, are not exactly fans of the $500 billion Stargate AI initiative announced by Trump this week.

SoftBank CEO Masayoshi Son speaks at a White House press conference on President Donald Trump's plan for AI infrastructure investment. MASA SON, SOFTBANK: Oh, thank you. That would be helpful. That's good.

Shares of SoftBank Group Corp. jumped as much as 8.1% after US President Donald Trump announced a multi-billion dollar push by the Japanese company, OpenAI and Oracle Corp. to build AI infrastructure in the US.

Microsoft and OpenAI are loosening the tight bond that connects them. In future, OpenAI will be able to obtain cloud capacities for its AI from elsewhere.

Microsoft will no longer be the exclusive provider of new cloud computing capacity to OpenAI — a new twist in their relationship that clears the way for OpenAI to work with Oracle and others on the $500 billion Stargate AI project announced by the companies Tuesday with President Trump at the White House.

Microsoft said it has "revenue sharing agreements that flow both ways" with OpenAI. "The key elements of our partnership remain in place for the duration of our contract through 2030, with our access to OpenAI’s IP, our revenue sharing arrangements and our exclusivity on OpenAI’s APIs all continuing forward," Microsoft said.