The Stargate dispute is part of a long feud between Elon Musk and Sam Altman, which started with a boardroom battle over leadership at OpenAI.

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

Some of the biggest names in technology have clashed after President Donald Trump unveiled his $500 billion private AI investment project. Earlier this week, Trump announced a joint ...