SoftBank made the final $10B investment in its $30B pledge to OpenAI's last funding round; source: Nvidia also made its final $10B investment in the round

SoftBank has fully deployed its $30 billion commitment to OpenAI, solidifying its position as a major investor and signaling continued confidence in the AI company's future.

SoftBank Group Corp. announced the completion of its $30 billion investment in OpenAI by executing the final $10 billion tranche on October 1, 2026. This investment, made through the SoftBank Vision Fund 2, brings SoftBank's total cumulative investment in OpenAI to $64.6 billion, resulting in an approximate 13% ownership stake. The funding for this final tranche was secured through the issuance of foreign currency-denominated senior notes. SoftBank has also canceled the remaining $10 billion of undrawn capacity under its bridge facility agreement, fully repaying all borrowings related to this facility.

This final investment tranche concludes SoftBank's massive $30 billion pledge to OpenAI, bringing its total investment to $64.6 billion and securing a 13% stake. The completion underscores OpenAI's significant capital requirements for its ambitious AI development and infrastructure scaling. The funding mechanism, relying on senior notes, indicates SoftBank's strategy to leverage debt markets to finance major technology investments, a move that could influence how other large-scale AI projects are funded.

The substantial capital infusion from SoftBank, alongside a reported $10 billion from Nvidia, highlights the immense financial resources being channeled into leading AI companies. This level of investment suggests an acceleration of AI development and a potential arms race among major players to dominate the frontier AI landscape. Investors and competitors alike will be watching OpenAI's technological advancements and market strategies closely, as the company's trajectory is now heavily backed by two tech titans.