SoftBank just borrowed $40B to own 13% of OpenAI

On March 27, 2026, SoftBank pulled off one of the boldest financial moves in tech history: securing a $40 billion unsecured bridge loan (a short-term emergency loan meant to be replaced by permanent financing — like using a credit card advance while waiting for a large paycheck) in a single business day. It is the largest dollar-denominated unsecured corporate loan ever recorded. Every dollar goes toward one purpose: buying more of OpenAI.

The lenders are five of Wall Street's most powerful institutions — JPMorgan Chase, Goldman Sachs, Mizuho Bank, SMBC, and MUFG Bank. The fact that five rival banks agreed to co-lend $40 billion in 24 hours is itself remarkable. It signals that institutional finance views the OpenAI trade as nearly certain — because the anticipated return is enormous.

The Bet That Could Define SoftBank Forever

SoftBank's founder Masayoshi Son has been calling AI the defining technology of civilization for years. Now he's putting a historically large amount of money behind that conviction. The $40 billion loan funds a $30 billion follow-on investment in OpenAI through SoftBank's Vision Fund 2 (a massive corporate investment vehicle — think of it as a professionally managed fund that buys ownership stakes in tech companies on behalf of institutional investors).

Once this investment closes, SoftBank's total capital deployed into OpenAI reaches $64.6 billion, representing approximately 13% ownership of the company — up from roughly 11%. That makes SoftBank the single largest external investor in OpenAI, even ahead of Amazon's $50 billion contribution to the same February 2026 fundraising round.

OpenAI's Revenue: 39 Months to Match What Took Salesforce 18 Years

The reason investors are pouring money in at nearly any price is OpenAI's revenue trajectory. In February 2026, the company reached $25 billion in annualized revenue (the projected yearly total based on current monthly income) — up from $20 billion just two months earlier. For context, Salesforce — the world's most successful enterprise software company — took 18 years to hit that same milestone. OpenAI did it in 39 months.

That growth rate is effectively unprecedented for a software business. OpenAI CEO Sam Altman is targeting an IPO (initial public offering — when a private company sells shares on the stock market for the first time) filing in H2 2026, with a market listing in 2027 at a valuation approaching $1 trillion.

Why the 12-Month Loan Deadline Is Wall Street's IPO Prediction

Bridge loans are structured with a clear underlying assumption: the money to repay them is coming soon from a known source. SoftBank's $40 billion loan matures on March 25, 2027 — exactly 12 months after issuance. For SoftBank to repay comfortably, OpenAI needs to go public at or near its $1 trillion target before that date.

At 13% ownership, a $1 trillion IPO would value SoftBank's stake at approximately $130 billion — more than three times the loan amount. Five major banks agreeing to lend $40 billion on a 12-month window is, in effect, Wall Street's official bet that the OpenAI public listing happens within the calendar year. TechCrunch reports this loan structure is widely read as a de facto IPO timeline commitment.

The Stargate Project: $500 Billion in AI Infrastructure

SoftBank's OpenAI investment exists inside an even larger strategic commitment. SoftBank and OpenAI are co-founding partners of the Stargate Project — a joint initiative targeting $500 billion in US AI infrastructure (data centers, compute clusters, and power systems) investment over 4 years. In December 2024, Masayoshi Son personally pledged $100 billion to US AI infrastructure at a White House ceremony with President Trump.

Sam Altman's reaction to the latest loan: "SoftBank is the perfect long-term partner to help us maximize the benefits of AI for people at global scale." Masayoshi Son: "AI is transforming the world at an unprecedented pace. OpenAI is a clear leader."

The Risk Nobody Is Ignoring

Credit rating agency S&P downgraded its outlook on SoftBank, warning that "the scale of its OpenAI exposure could impair the company's liquidity" — meaning SoftBank could struggle to meet other financial obligations if the OpenAI bet goes wrong.

The concern is real: SoftBank is borrowing $40 billion without collateral (no assets pledged as backup if repayment fails) to invest in a company that remains unprofitable, on a 12-month timeline that requires an IPO to materialize on schedule. Masayoshi Son has made catastrophic bets before — most famously WeWork, where he lost billions. But he's also produced legendary returns — his early investment in Alibaba generated roughly 1,000x profits.

For everyday AI users: if OpenAI goes public near $1 trillion and the Stargate infrastructure comes online, the practical result is faster AI models, larger compute (processing power) capacity, and potentially lower costs for services like ChatGPT — all powered by capital flows that began with this $40 billion loan.

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