SoftBank and Nvidia complete $20 billion final OpenAI investment

By Splitfeed EditorialLast updated Oct 1, 2026, 19:30 UTC

On or around October 1, 2026, SoftBank completed the third and final tranche of its $30 billion investment commitment in OpenAI, with Nvidia joining as a co-investor to bring the combined final payment to $20 billion. MarketScreener reported the conclusion of the transaction, while The Information separately reported Nvidia's participation. To fund its share, SoftBank had earlier raised $11.1 billion through a notes offering, meaning a substantial portion of the Japanese conglomerate's OpenAI commitment was financed through borrowed money. The precise split between SoftBank and Nvidia within the $20 billion final tranche has not been confirmed.

The scale of this deal places it among the largest single investments in AI history, and it arrives at a moment when questions about the sustainability of AI capital expenditure are growing louder. SoftBank's decision to borrow heavily through bond markets to meet the commitment is the detail that sharpens the debate, because it shifts the question from whether OpenAI is valuable to whether the investors financing it can absorb the risk if returns take longer than expected or capex across the sector contracts. Nvidia's participation is also notable, since it represents a chipmaker investing directly in one of its largest software customers, a relationship that could create both alignment and conflict-of-interest questions down the road.

None of the three camps, Pro-AI, Anti-AI, or Middle Ground, had published reactions available at the time of writing. Pro-AI voices would typically frame a $30 billion completed commitment as validation that serious institutional capital sees transformative returns ahead. Anti-AI voices would be expected to focus on the $11.1 billion bond sale as evidence of dangerous leverage building up around AI, a warning sign that enthusiasm is outpacing fundamentals. Middle Ground observers would likely acknowledge the commercial momentum while flagging that Nvidia investing in its own customer creates structural questions worth watching as the AI infrastructure spending cycle matures.

The figure to track next is how SoftBank accounts for the investment on its balance sheet and whether OpenAI moves toward a public offering or revenue milestones that would let both investors mark the position against something concrete. Any sign of a slowdown in AI capital expenditure across major buyers would also test the thesis quickly, given how much of SoftBank's commitment was funded through debt.