SoftBank completes $41 billion investment in OpenAI, deepening bet on AI

December 30, 2025 9:15 AM EST

The logo of SoftBank Group Corp is displayed at SoftBank World 2017 conference in Tokyo, Japan, July 20, 2017. REUTERS/Issei Kato

By Krystal Hu

Dec 30 (Reuters) - ⁠SoftBank Group said ⁠it ‍completed a $41 billion investment in OpenAI, one of the largest-ever private funding rounds that would give the Japanese firm a ‍stake of about 11% in the ChatGPT maker.

SoftBank Chief Executive ​Masayoshi Son has made an "all in" bet on OpenAI and is expanding investment in ​artificial intelligence and related infrastructure, hoping to capitalize on surging demand for the computing capacity that underpins AI applications.

The completion of the latest funding round for OpenAI ​comes just days after SoftBank unveiled a deal to buy digital infrastructure investor DigitalBridge Group in a deal valued at $4 billion.

On Wednesday, ​SoftBank said it completed an additional $22.5 billion investment in OpenAI after putting in $7.5 billion in April. OpenAI ‌also received an upsized syndicated co-investment from other backers worth $11 billion, SoftBank added.

In March, SoftBank agreed to invest up ​to $40 billion into a for-profit subsidiary ⁠of OpenAI, with the funding structured as a combination of direct capital and syndicated co-investment from other backers.

The deal ‌valued OpenAI at around $300 billion on a post-money basis, but a later secondary stock sale completed in October, valued the company at around $500 billion, according to ‌Pitchbook data.

CNBC first reported the news earlier in the day.

AI has become the central ‌axis of global technology markets this year, driving a surge of investment by the world's largest companies and reshaping investor expectations.

OpenAI has emerged as a central pillar ‍of that industry-wide AI spending push.

The ChatGPT maker along with Oracle and other stakeholders has planned a project ⁠dubbed "Stargate", a vast, multi-year data-center initiative aimed at supporting next-generation AI models, with backing from major investors including SoftBank.

(Reporting by Akash Sriram and Surbhi Misra in Bengaluru and Krystal Hu in San Francisco; Editing by Krishna Chandra Eluri, Miyoung Kim and Thomas Derpinghaus)



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