Anthropic's $15 Billion Credit Facility: Inside the Biggest Pre-IPO War Chest in AI History

Just weeks before what could be the largest initial public offering in history, Anthropic PBC is putting the final touches on something less glamorous but arguably just as important: a $15 billion revolving credit facility, led by Morgan Stanley, that would rank among the biggest pre-IPO credit lines ever assembled for a technology company.

Bloomberg reported on September 3 that the Claude maker is set to finalize an expansion of its revolving credit facility to $15 billion, up from an originally targeted size of roughly $10 billion and a world away from the $2.5 billion five-year facility the company secured only last year. Morgan Stanley is leading the process, with Goldman Sachs and JPMorgan Chase holding prominent roles. Barclays and Wells Fargo are expected to take key positions on the loan, while Bank of America and Deutsche Bank round out a second tier of lenders.

For a company that was burning through private-market cash just eighteen months ago, the message is unambiguous: Anthropic now has the kind of balance sheet that Wall Street’s biggest banks are willing to compete — hard — to finance.

Anatomy of the deal

The structure tells its own story. When Anthropic first sounded out lenders in August, it asked the banks taking the most active arranging roles to commit around $1.25 billion apiece, with a second tier of lenders writing somewhat smaller checks, according to Reuters. Demand was strong enough that the facility’s size kept climbing — first past the $10 billion mark, then to the $15 billion figure now being finalized.

That trajectory matters. Revolving credit facilities are not fundraising; they are standby liquidity — money a company can draw when it needs it and repay when it doesn’t. A $15 billion revolver is effectively a vote of confidence from a syndicate of the world’s largest banks that Anthropic’s cash flows are predictable enough, and its collateral credible enough, to support six times more standby credit than it could obtain a year ago.

The expansion also “clears a hurdle for the anticipated IPO,” as Moneycontrol put it. Public-market investors and rating agencies look closely at liquidity ahead of a listing, and a fully syndicated revolver of this scale removes one of the last open questions about Anthropic’s readiness to operate as a public company.

Why the banks are lining up

There is a second, quieter competition running beneath the syndication: the race for underwriting work. Banks have been jockeying for position on Anthropic’s credit facility precisely because a lead lending role is widely seen as a stepping stone to a coveted spot on the IPO itself — potentially the largest equity offering ever brought to market.

Morgan Stanley, Goldman Sachs and JPMorgan are reportedly already working on the listing, which could come as soon as this fall. For the loser banks in the credit sweepstakes, a secondary lending role is the consolation prize that keeps them in the room.

The numbers behind the confidence

The facility is being underwritten against one of the most dramatic revenue ramps in the history of software. Anthropic exited 2025 at roughly $9 billion in annualized run-rate revenue. By February 2026 that figure had reached $14 billion, then $19 billion in March, $30 billion in April, and $47 billion by mid-May. By the end of July, sources told Reuters, the run rate had topped $65 billion.

That is a seven-fold expansion in seven months — a pace that explains both why banks are comfortable extending $15 billion in standby credit and why the company needs it. Frontier AI is a brutally capital-intensive business: training runs, inference capacity, and the long-term compute contracts that lock both in all demand enormous upfront spending, often well before the associated revenue arrives.

The credit line exists in a broader financing context. Broadcom has been assembling what amounts to a $100 billion AI debt machine with Anthropic as its first customer, part of an industry-wide turn toward debt and vendor financing to fund the compute buildout. Anthropic’s revolver gives it flexible, investment-grade-style liquidity on top of that infrastructure financing — a layer of insulation against any hiccup in the capital markets between now and listing day.

The IPO endgame

Everything now points toward a fall listing of historic proportions. Anthropic’s investors have floated targets as high as $2 trillion — a figure that would eclipse every IPO on record — while reports from earlier in the summer suggested the lead banks were modeling more conservative valuations in the $400 billion to $500 billion range. The company has also prepared supervoting shares that will let its founders retain control after the float, and executives have signaled they aim to match or beat SpaceX’s record-setting listing.

Wherever the final number lands, the $65 billion run rate gives underwriters a story no pre-IPO software company has ever been able to tell. Even at the low end of the valuation chatter, Anthropic would be pricing at a fraction of the revenue multiples attached to slower-growing software legends — the bull case that has dominated every recent investor conversation about the deal.

What to watch

Three things will signal how this resolves. First, the formal close of the syndication: a fully committed $15 billion facility with a clean bank group removes any doubt about pre-IPO liquidity. Second, the S-1 filing itself, which will finally put audited numbers behind the run-rate figures that have circulated in press reports — and reveal how much of that $65 billion arrives with healthy gross margins versus subsidized inference. Third, the valuation the market actually clears, which will set the reference price for every AI listing that follows.

The $15 billion credit facility will barely register as a headline compared with the IPO that may follow it. But in a year when AI’s biggest companies have increasingly funded their ambitions with debt, it is the clearest signal yet of how Wall Street now sees Anthropic: not as a speculative startup to be tolerated, but as infrastructure-grade credit that the world’s most conservative lenders are willing to back at scale.