SoftBank Group has finalized its commitment to invest $40 billion in OpenAI, making it one of the largest private funding rounds ever recorded. The Japanese conglomerate structured the deal as a combination of direct capital and syndicated co-investment, having previously syndicated $10 billion and invested $8 billion earlier this year. Last week, SoftBank delivered the remaining $22–22.5 billion, taking its total stake in OpenAI to over 10%. The initial agreement valued OpenAI at roughly $300 billion post-money, with a secondary transaction in October pushing that valuation to about $500 billion, according to PitchBook. This injection of capital strengthens SoftBank’s strategic bet on artificial intelligence and underpins the joint “Stargate” data-center initiative with Oracle and other partners, designed to support next-generation AI models over multiple years.

In a separate move to bolster its AI infrastructure capabilities, SoftBank announced plans to acquire DigitalBridge, a specialist in digital real-estate and data-center investment, for approximately $4 billion. Chairman and CEO Masayoshi Son highlighted that the transaction aligns with the company’s goal to control critical physical assets—compute, connectivity and power—necessary for large-scale AI deployment. DigitalBridge will continue operating as an independent platform under CEO Marc Ganzi, and the deal is expected to close in H2 2026, subject to regulatory approval. This acquisition follows SoftBank’s recent sale of nearly $6 billion in Nvidia shares, a decision the company’s CFO, Yoshimitsu Goto, said was driven by the desire to reallocate funds toward AI ventures such as OpenAI and the newly acquired DigitalBridge assets.