SoftBank Completes Full $40 Billion Investment In OpenAI

CEO Masayoshi Son is making an “all-in” bet on AI, expanding investments in artificial intelligence and its supporting infrastructure to meet growing demand for computing power.

SoftBank finalized a $22–22.5 billion investment in OpenAI last week, bringing its total commitment to $41 billion, including $7.5 billion earlier and $11 billion syndicated with co-investors, giving it an 11% stake.

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The funding supports OpenAI’s AI infrastructure, including the Stargate joint venture with Oracle. OpenAI has committed over $1.4 trillion in infrastructure spending with Nvidia, AMD, and Broadcom.

SoftBank, a longtime AI and tech investor, also acquired DigitalBridge for $4 billion to strengthen its AI push and recently sold its $5.8 billion Nvidia stake to fund OpenAI investments. Other OpenAI backers include Microsoft, Amazon (potential $10 billion), and Disney ($1 billion for Sora content).

The deal initially valued OpenAI at around $300 billion post-money, though a later secondary stock sale in October raised the valuation to about $500 billion, according to PitchBook.

OpenAI, alongside Oracle and other investors, is developing “Stargate,” a multi-year data center project supporting next-generation AI models.