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,

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

SoftBank is in talks to invest up to $25 billion in OpenAI as part of a broader partnership that could see the Japanese conglomerate spend more than $40 OpenAI is in talks to raise up to $25 billion from SoftBank amid DeepSeek shock.

SoftBank (SFTBY) is reportedly considering a massive investment of up to $25 billion in Microsoft (MSFT)-backed OpenAI, according to sources

“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 ...

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.

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.

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

The $500 billion Stargate Initiative — led by Trump, OpenAI, SoftBank, and Oracle — is set to revolutionize U.S. AI infrastructure.

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.

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

SoftBank is in talks to invest in OpenAI, potentially deepening the relationship between the two companies that are already planning an artificial-intelligence infrastructure initiative.