SoftBank wants ten billion dollars from Wall Street against a stock that doesn't trade on any exchange, and it's now promising to personally cover the losses if that bet goes wrong.
Masayoshi Son's company has gone back to Goldman Sachs, JPMorgan and Mizuho with almost the same request it made earlier this year: a $10 billion margin loan, collateralized by SoftBank's stake in OpenAI. According to Reuters, the earlier attempt stalled because lenders couldn't agree on how to value a private company's shares, and SoftBank quietly scaled the ask down to around $6 billion in May. Now it's pushing for the full amount again, and it's sweetened the deal with something banks actually asked for: a repayment guarantee that gives them recourse to SoftBank itself if OpenAI's shares lose value before the loan comes due.
That single concession tells you who had leverage in this negotiation, and it wasn't the company borrowing the money.
You don't offer a parent-company guarantee on a loan unless the collateral alone wasn't good enough. And the collateral here is genuinely hard to price. OpenAI has no public stock, no ticker, no daily close. It set its most recent private valuation at $852 billion in a March 2026 funding round that included a $122 billion investment package co-led by SoftBank, part of a commitment that has pushed SoftBank's total exposure to OpenAI and the related Stargate data center buildout past $60 billion. By October, SoftBank's OpenAI stake alone is on track to be worth around $65 billion, on paper. Whether that number survives contact with a real market is exactly the question the lenders are wrestling with.
OpenAI confidentially filed a draft S-1 with the SEC on June 8, according to CNBC, positioning itself for a public listing that Sam Altman has said he won't take below a $1 trillion valuation. That filing was supposed to be the thing that finally gave SoftBank's stake a real price tag. Then, in late June, Reuters reported that OpenAI might push the offering into 2027 instead of debuting later this year. Bloomberg reported that SoftBank's own shares tumbled on the news, and other outlets put the paper loss at roughly $38 billion in a single stretch. That's the kind of swing you get when your balance sheet is pegged to an asset nobody can currently sell.
SoftBank doesn't have the luxury of waiting this out quietly. It's already carrying a separate $40 billion bridge loan, syndicated in March by JPMorgan, Goldman Sachs, Mizuho, Sumitomo Mitsui and MUFG to fund a $30 billion follow-on investment in OpenAI, and that facility matures on March 25, 2027. The market's working assumption has been that an OpenAI IPO, ideally at a valuation north of $400 billion for SoftBank's roughly 13 percent stake, would generate enough liquidity to retire that loan on schedule. Push the IPO into 2027 and you compress the window between OpenAI finally going public and SoftBank having to repay $40 billion, with not much room for anything to go wrong in between.
Here's the thing that should worry anyone watching AI financing from the outside: this isn't one bank taking a view on one company. It's Goldman Sachs, JPMorgan and Mizuho all sitting on both loans, the $40 billion bridge and potentially the new $10 billion margin facility, plus Sumitomo Mitsui and MUFG on the bridge loan too. The same handful of institutions are underwriting SoftBank's exposure to OpenAI from multiple angles at once, against collateral that only has one real exit: a successful IPO at a specific price, on a specific timeline. Concentrate that much lending in that few hands, against one asset with one path to liquidity, and you've built exactly the kind of interconnected exposure that turns an individual company's bad quarter into everyone's problem.
None of this means OpenAI's business is shaky. The company is still expected to seek a valuation above $1 trillion whenever it does list, and Stargate's data centers, ten of them already under construction in Abilene, Texas, aren't going away. But SoftBank's borrowing pattern, first a $40 billion bridge loan, now a renewed push for $10 billion more, both leaning on the same OpenAI paper, only makes sense if you believe the IPO happens roughly on schedule and prices well. If it doesn't, SoftBank has told its lenders exactly who's on the hook. It's SoftBank itself.
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