This article originally appeared in NerdWallet's investing newsletter, the Nerdy Investor. You can subscribe for free here.
A few months ago, I wrote about how OpenAI and Anthropic were widely expected to go public at trillion-dollar valuations as early as September or October, following SpaceX’s blockbuster initial public offering back in June.
Now, both of the big AI labs have officially pushed back their IPOs — Anthropic until at least November, and OpenAI until next year.
They’re not the only tech companies that have announced and then delayed buzzy stock market debuts. Oura, the maker of those little smart rings you might have seen your health-conscious friends wearing, announced a multibillion-dollar IPO on Sept. 21 before abruptly postponing it earlier this week.
Why are so many hotly anticipated tech IPOs getting pushed back, and how should retail investors think about these companies? I talked to three IPO experts at some of the country’s most prominent universities to find out.
Why the delays? Part of it is the economic climate
“Market volatility has really picked up,” says Dr. Reena Aggarwal, director of the Psaros Center for Financial Markets and Policy at Georgetown University.
“Part of that is driven by the high-interest-rate environment that we’re in. That’s causing problems,” Aggarwal says.
Rising interest rates increase borrowing costs, which can eat into the bottom lines of publicly traded companies (especially those that aren’t profitable yet) and make investors more risk-averse. Case in point: The S&P 500 was almost completely flat for the month of September, as down days canceled out up days.
And while SpaceX raised a record-breaking amount of money in its IPO this summer, it’s had a bumpy ride since then, and still trades below its day-one closing price. That, too, may be spooking future IPO hopefuls. “It was trading at far below the offer price before it again picked up. That doesn’t send a strong signal to the market,” Aggarwal says.
But some companies may have overhyped themselves, too
According to Dr. Michael Ewens, the director of the Private Equity Program at Columbia Business School, there are also company-specific reasons for the recent IPO delays.
“OpenAI, Oura, all of these companies are hiring banks to go out and figure out demand for their shares. They’re getting peppered with questions, like ‘What do you expect margins to be in the next 10 years? What’s your capital expenditure? Is revenue growth flowing?’” Ewens says.
“Those questions may not have the best answers. And then you get hesitancy from the large institutional investors, like mutual funds, who have to put up the money in the IPO, and that can make you pull back,” he says.
Back in June, leaked OpenAI financial documents showed that the company lost nearly $39 billion last year. And earlier this week, Reuters reported that Anthropic’s confidential IPO prospectus showed a $42 billion loss last year.
Dr. Jay Ritter, director of the IPO Initiative at the University of Florida Warrington College of Business, concurred in an email interview that some companies simply realized that they’re not ready to go public.
“With Oura, the company was trying to get a higher price than investors were willing to pay. This was the problem with the postponed Bamboo Insurance IPO a few weeks ago, too. Both are great companies, but Oura will have a difficult time maintaining its recent growth rate,” Ritter said.
“Other consumer product companies, including GoPro, Peloton, and SoulCycle (it attempted to go public in 2015), have been unable to continue their rapid growth. Investors are concerned about paying for growth that may not materialize,” he said.
AI safety concerns are harshing the vibe
Ritter and Aggarwal both added that safety concerns around OpenAI and Anthropic’s products have added to the IPO headwinds.
“OpenAI is not rushing its IPO because of the need to add safeguards in its latest large language models, to reduce the probability that the models will do something really bad, or that a bad actor will use them to create immense damage,” Ritter said.
Earlier this week, OpenAI told WIRED that it would delay the release of its latest AI model, GPT 6.1 Astra, due to safety concerns, weeks after several of its experimental models hacked private-sector and government websites without human input. Anthropic has also delayed product releases this year, such as its Claude Mythos model back in April, to build additional safeguards against rogue behavior and abuse by bad actors.
How long will the delays last? When will companies decide the coast is clear?
According to Aggarwal, companies will likely wait for market volatility to die down before proceeding with their IPOs, which is hard to estimate a timeframe for.
Ewens says that there’s a good chance most IPOs will wait until the new year or even the spring, for a couple of reasons: The midterm elections and the holiday season.
“I would suspect that some of these firms are factoring in the major changes that could occur if Congress flips. Regulatory changes, extra scrutiny,” Ewens says.
Last week, NerdWallet’s news team wrote about how AI data center construction is deeply unpopular among voters from both major parties, and how the issue may particularly hurt Republican candidates given President Trump’s strong support of the AI industry and data center construction. Some candidates are calling for moratoriums on such construction.
We’re also coming up on a seasonal IPO roadblock. “Holidays matter. December tends to be slow, January even slower,” Ewens adds.
IPOs may not have as much upside as they did in the “old days”
Here at the Nerdy Investor, we are biologically incapable of writing about IPOs without citing Nasdaq’s study of market debuts between 2010 and 2020, written by Nasdaq Chief Economist Phil Mackintosh, which found that most were underperforming broad stock market indexes by their third year of trading.
But on top of that, the potential to make money on an unusually strong IPO may have decreased over time, according to Aggarwal.
That’s because a lot has changed in how IPOs work. On the one hand, some brokerages now offer IPO shares — which were once only available to institutions — directly to retail investors.
But on the other hand, companies are doing a lot more private-market fundraising than they used to (sometimes using online platforms which are only available to accredited investors), which means that ordinary retail investors are still left out from some of the best early entry points.
“In the old days, all the price discovery used to happen when the IPO took place. But now there are so many funding rounds happening before the IPO that a lot of price discovery has happened already. So the big bump-up in price is happening early on, and so if retail investors don’t have access to that, then they’re missing out on that piece,” Aggarwal says.
“A lot of the upside is happening in the private markets, before the company goes public,” she says.
Article sources
NerdWallet writers are subject matter authorities who use primary, trustworthy sources to inform their work, including peer-reviewed studies, government websites, academic research and interviews with industry experts. All content is fact-checked for accuracy, timeliness and relevance. You can learn more about NerdWallet's high standards for journalism by reading our editorial guidelines.
- 1.Wall Street Journal. Anthropic’s IPO Will Happen a Month Later Than Expected. Accessed Oct 1, 2026.
- 2.Fortune. Sam Altman confirms OpenAI won’t go public this year, saying an IPO now would come at an ‘ill-advised moment’ given AI safety concerns. Accessed Oct 1, 2026.
- 3.Businesswire. ŌURA Announces Launch of Initial Public Offering. Accessed Oct 1, 2026.
- 4.Businesswire. Oura Postpones Initial Public Offering. Accessed Oct 1, 2026.
- 5.Financial Times. OpenAI spending hit $34bn last year ahead of planned IPO. Accessed Oct 1, 2026.
- 6.Reuters. Anthropic's IPO prospectus shows sweeping AI vision, surging costs. Accessed Oct 1, 2026.
- 7.WIRED. OpenAI Delays Release of Latest Model Over Safety Concerns.
- 8.NBC News. Why Anthropic won't release its new Claude Mythos AI model to the public. Accessed Oct 1, 2026.
- 9.Nasdsaq. What Happens to IPOs Over the Long Run?. Accessed Oct 1, 2026.
