The investment brings together an alliance of tech giants. While SoftBank and OpenAI are lead partners—with SoftBank handling financials and OpenAI managing operations—Oracle and MGX have also joined as equity funders.

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.

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.

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.

Masa first encountered Steve Jobs in the mid-1980s at the annual Comdex trade fair in Las Vegas. Sometime in the summer of 1998, they had their first serious conversation under a cherry tree at the Woodside, California, home of Larry Ellison, boss of the Oracle software group and a fellow Japanophile.

SoftBank Group Corp., OpenAI, and Oracle Corp. are forming a $100 billion joint venture to fund artificial intelligence infrastructure, an effort unveiled with President Donald Trump aimed at speeding development of the emerging technology.

The president said it will be the largest AI infrastructure ever built and that it will help counter technology threats from China and other countries.

U.S. President Donald Trump announced Stargate, a $500 billion AI infrastructure project that's expected to provide 100,000 jobs and boost the American economy, but Elon Musk believes the three companies leading the project don't have the funds.

SoftBank CEO Masayoshi Son's plan to invest billions in AI in the United States shows one way to handle the new Trump administration: go big and deal with the details later.

SoftBank CEO Masayoshi Son's plan to invest billions in AI in the United States shows one way to handle the new Trump administration: go big and deal with the details later. For a Japan Inc anxious about how to navigate the second term of President Donald Trump - and the threat of steep tariffs or other punitive measures - that approach may not be so easy to replicate.

OpenAI has announced that it's teaming up with Softbank and Oracle on $100 billion data center project in the U.S.