SoftBank completes $41bn OpenAI investment, lifts stake to 11%

SoftBank Group announced on December 31, 2025 that it has completed an additional $22.5 billion investment in OpenAI, bringing its total commitment to $41 billion. The deal raises SoftBank’s aggregate ownership in OpenAI to about 11%, with the rest of the round filled by $11 billion from third‑party co‑investors.([group.softbank](https://group.softbank/en/news/press/20251231?utm_source=openai))