TOKYO — The most aggressive financier of the artificial intelligence boom asked the world’s banks a simple question: how much will you lend against the most valuable startup ever created? The answer, for now, is a pause.
SoftBank Group’s talks to raise at least $6 billion through a margin loan backed by its OpenAI stake have stalled, Bloomberg reported on Wednesday, and SoftBank’s Tokyo-listed shares fell on the news. Some prospective creditors balked at the problem of valuing OpenAI, a private company, as collateral, and at reports that the startup has missed some internal sales and user milestones in recent quarters. The loan was structured with a two-year term and a one-year extension option.
The stall is the second downgrade of the same ambition. SoftBank originally sought $10 billion against the stake and cut the target by 40 percent in May as lender caution surfaced. A borrowing plan that shrinks from ten billion to six and then stops moving is not a technicality. It is a price signal from the one market that does not buy stories: the people who must get their money back even if the valuation does not hold.
Margin loans against private stakes are rare at any size because everything depends on what the collateral is worth under stress. OpenAI’s paper valuation has been quoted as high as $1.4 trillion in secondary markets, but a lender cannot sell paper into a market that does not exist, and the detail in Wednesday’s reporting, missed internal sales and user milestones, is precisely the kind of fact that turns a collateral committee cautious. The banks are not saying OpenAI is failing. They are saying they cannot price it, which in credit is its own verdict.
The timing makes the question public. OpenAI filed confidentially for a US listing on Monday, the event that would finally replace internal milestones with audited numbers and a daily price. Until that prospectus becomes public, every counterparty is being asked to underwrite a company whose disclosures are private, and SoftBank’s stalled loan suggests how the most sophisticated of them answer.
The same week shows where the money still flows freely, and on what terms. OpenAI is negotiating a 10-gigawatt campus on federal land with Nvidia’s backing, vendor financing from the supplier with the most to gain from the orders. Anthropic took $35 billion in private chip debt from Apollo and Blackstone, secured against contracts and hardware. The pattern is consistent: the AI buildout can still borrow enormously against things, chips, land, purchase orders. What stalled this week was borrowing against a belief.
For SoftBank the loan was meant to fund the next round of exactly these commitments without selling assets, the financial engineering Masayoshi Son has used for a decade to stay levered to his convictions. SoftBank has committed tens of billions to OpenAI and the Stargate buildout, and the margin loan was the cheapest way to keep that wheel spinning. The alternative paths, selling Arm shares, drawing on other credit lines, or simply waiting for the IPO to make the stake bankable, all cost something Son has historically refused to pay: time or position.
What nobody outside the talks can say is whether the stall is a death or a renegotiation, what spread would revive it, and which of the missed milestones mattered to the lenders. SoftBank declined to comment, OpenAI’s numbers remain private, and the banks, as ever, communicate only through what they decline to sign.
The AI trade has spent two years proving there is no ceiling on what equity investors will believe. This week a quieter market weighed in. Asked to lend six billion dollars against the boom’s crown jewel, the people whose job is pricing risk looked at the collateral and asked SoftBank to wait.
