OpenAI closes a $40B round, the most raised by a private tech company, at a $300B post-money valuation; SoftBank led with $30B; source: ~$18B is for Stargate

OpenAI on Monday announced it had closed what amounts to the largest private tech funding round on record.

CNBC 2025-04-01

Context & Ripple Effects

This round moved OpenAI from a planned financing into a completed $40B raise, with SoftBank as the dominant backer and a substantial portion earmarked for Stargate. Reporting that SoftBank's commitment would be staged through year-end framed the deal as a large, execution-dependent capital program rather than a conventional one-time venture round.

It became an early step in an escalating financing arc: OpenAI later raised $110B at a $730B pre-money valuation and then closed a $122B round at an $852B post-money valuation. The continuity of SoftBank's role makes this initial commitment important as a marker of how concentrated backing supported that expansion.

First-order effects

OpenAI gains $40B of fresh capital at a $300B post-money valuation, while SoftBank assumes an outsized financial role through its $30B commitment.
About $18B is directed to Stargate, immediately tying nearly half the round to infrastructure deployment rather than leaving all capital available for general operations.

Second-order effects

The allocation makes infrastructure execution central to the value of the financing: Stargate-linked suppliers and counterparties become more consequential to OpenAI's ability to turn the raise into capacity.
Rival frontier labs face a clearer financing benchmark, as OpenAI's ability to pair a very large round with a dedicated infrastructure budget raises the capital required to compete on scale.

Third-order effects

If follow-on rounds continue the pattern, frontier AI development may become increasingly shaped by a small set of backers able to finance both model developers and the infrastructure behind them.
The later $122B committed-capital round suggests the relevant competitive unit is shifting from individual model companies toward long-duration capital-and-compute programs, though the durability of that model depends on deployment results.

The trend: This is one data point in the financialization of frontier AI, where concentrated private capital is increasingly funding infrastructure-heavy development programs alongside model building.

Discussion

@carnage4life Dare Obasanjo on bluesky
OpenAI has now raised over $57B which is an incredible number for a startup. SoftBank put in $30B of the $40B in the latest round. — Hopefully this turns out like their ARM investment and not like WeWork.
@edzitron.com Ed Zitron on bluesky
We are not quite in the WeWork zone, but we're close. SoftBank had $16bn in WeWork, but only has $9.25bn ($250m last round, $1.5bn tender, $7.5bn in first tranche) in OpenAI so far. Tranche 2 will make it just a bit bigger at $19.25bn, if they even pay. — finance.yahoo.com/ne…
@andrewparker Andrew Parker on bluesky
Nothing says “this is the next big thing, we're a totally viable business” like “the vast majority of our current funding is from the same bank that was ride or die with WeWorks” [embedded post]
@edsbs @edsbs on bluesky
oh SoftBank is in there? COOKED [embedded post]
@edzitron.com Ed Zitron on bluesky
*$40bn — *$10bn up front, $30bn “by end of year” and they lose $10bn off the top if they can't convert to for profit, which is in my opinion is impossible. gonna need it with 500m weekly active users! Hey why do they never give monthly active? Is it because the conversion st…
@sama Sam Altman on x
the chatgpt launch 26 months ago was one of the craziest viral moments i'd ever seen, and we added one million users in five days. we added one million users in the last hour.
@mikeisaac Rat King on x
openAI announces it has closed a $40 billion fund raise, valuing the company at a staggering $300 billion dollars. some interesting stats: half a billion people use chatGPT weekly 20 million paid “plus” subs
@garymarcus Gary Marcus on x
Breaking: SoftBank is valuing OpenAI, which has never turned a profit, and which faces increasing competition and price wars, at $300B. That's more than the market cap for Chevron, Salesforce, Philip Morris, Cisco, Wells Fargo, IBM, Merck, McDonald's, General Electric, PepsiCo,
@rogoswami Rohan Goswami on x
SoftBank CEO Masa Son on OpenAI deal: “AI is a defining force shaping humanity's future. Our expanded partnership with OpenAI accelerates our shared vision to unlock its full potential”
@kyliebytes Kylie Robison on x
busy day over at the ol' cash burn warehouse https://www.theverge.com/...
@apompliano Anthony Pompliano on x
OpenAI just raised $40 billion in a single fundraising round. $40,000,000,000 Wild.
@edzitron Ed Zitron on x
Suicide round btw. How do you raise past this? Also, why only give $10bn up front? Why is the rest “by the end of the year” if SoftBank is so confident? OpenAI anticipates to spend $13bn on MS' compute in 2025. How do they afford to?
@danprimack Dan Primack on x
Masa Son statement on OpenAI deal: “AI is a defining force shaping humanity's future. Our expanded partnership with OpenAI accelerates our shared vision to unlock its full potential.”
@mikebutcher Mike Butcher on x
Given almost half ($18B) of the $40B funding will go toward OpenAI's Stargate infrastructure project to establish AI data centers across the U.S., we can conclude that it believes more compute solves the hallucination problem. But many critics think they are barking up the wrong
@gavinpurcell Gavin Purcell on x
So as OpenAI raises their big $$$ I have a request from @sama & @kevinweil: a Plus family plan Let me pay say $50 bucks a month for up-to-four members of my family who all have individual memory + isolated experience + history. Maybe some extra credits for Research + Image.
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OpenAI closes $40 billion funding round, largest private tech deal on record
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OpenAI closes $40 billion funding round, largest private tech deal on record
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OpenAI closes $40 billion funding round, largest private tech deal on record
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OpenAI Finalizes $40 Billion Funding at $300 Billion Valuation

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