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Softbank has fully funded $40 billion investment in OpenAI, sources tell CNBC

SoftBank finalized a $40 billion investment in OpenAI, supporting AI infrastructure and the Stargate joint venture with Oracle, marking one of the largest private tech funding rounds.

  • On Dec 30, SoftBank Group completed its $40 billion investment commitment to OpenAI, CNBC reported Tuesday, marking one of the largest private funding rounds and deepening Masayoshi Son's AI bet.
  • SoftBank had previously syndicated $10 billion and invested $8 billion, with the deal structured as a mix of direct capital and syndicated co-investors, sources told CNBC.
  • A final tranche of $22 billion to $22.5 billion completed the payment schedule last week, with portions supporting OpenAI's Stargate joint venture with Oracle.
  • The funding cements OpenAI's role as a central pillar of AI industry spending, as AI has become the central axis of global technology markets this year.
  • Sources had expected payments over a 12 month period, as SoftBank Group builds its AI and data-center infrastructure program, CNBC reported.
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Japan's technology investment giant SoftBank announced on Wednesday that its participation in the US OpenAI (ChatGPT) was now about 11% after completing the second stage of a total investment of $41 billion.

·Montreal, Canada
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Lean Right

The Softbank telecommunications group completed its $40 billion investment commitment in OpenAI, as reported on Tuesday by CNBC, an investment that the Japanese giant agreed earlier this year. Softbank transferred last week’s final investment of between $22,000 and $22.5 billion to ChatGPT creators, according to a familiar source to the U.S. chain. This amount adds to the investments of $10 billion and $8 billion Softbank to OpenAI last year. So…

·Chile
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Softbank has fully funded $40 billion investment in OpenAI, sources tell CNBC

·United States
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  • 34% of the sources lean Left, 33% of the sources are Center, 33% of the sources lean Right
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Benzinga broke the news in New York, United States on Tuesday, December 30, 2025.
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