Altman rules out an OpenAI IPO in 2026, citing AI safety

OpenAI will not go public in 2026, chief executive Sam Altman said Saturday, calling a listing now an “ill-advised moment” while the company works on AI safety and alignment. The Fortune interview with editor-in-chief Alyson Shontell, published Saturday afternoon, closes the 2026 path finance chief Sarah Friar had left open only if the business inflected.

For anyone waiting to buy OpenAI stock, the consequence is immediate and small: you still cannot, and you will not this year. Saturday did not reprice Microsoft, Nvidia, Oracle, or CoreWeave. U.S. exchanges were closed; Monday is the first session that can react. What it did was close that conditional 2026 path, on safety grounds, the same weekend Anthropic’s bankers were reported lining up an anchor.

What Altman closed, and what he left unsaid

“I actually think that, given everything happening with safety, right now would be an ill-advised moment to go public, and we don’t feel pressure on that,” Altman told Fortune. Pressed on whether 2026 was off the table in favor of 2027, he answered: “I would say not 2026.” He added, “Yeah, we got a lot of stuff to do, like meeting this moment of what is going to be required for safety and alignment, and how the industry and governments can work together.”

He did not name 2027. Fortune’s published exchange does not lock that year in or out.

That is a tighter line than Friar drew three weeks ago. On Wednesday, August 19, Friar told employees OpenAI “will be a public company in 2027” and could debut sooner if “our business continues to inflect,” CNBC reported, citing people familiar with her remarks. She called the IPO “a milestone, another fundraise,” not a finish line. The confidential S-1 OpenAI submitted on June 8, when the company said it had “not yet determined timing for further action,” remains on file with no public listing date attached.

In June, Reuters, citing a source, had reported that OpenAI was targeting a valuation of up to $1 trillion and that an IPO could come as early as September. That timetable is now, in Altman’s words, not 2026.

Anthropic’s bankers have the nearer window

On Friday, Reuters, citing people familiar with the matter, reported that Anthropic is seeking to raise as much as $100 billion at around a $2 trillion valuation and that Nvidia is considering investing up to $10 billion as an anchor. The talks remain under discussion and could change, Reuters said.

On September 4, Reuters reported Anthropic was expected to begin marketing a listing in mid-October at the earliest and complete it days before the U.S. midterm elections. If those sources hold, the public market’s first pure-play frontier lab this year would not be OpenAI.

Nvidia already sits on both sides of that split. It is a disclosed investor in OpenAI’s last round and, since September 22, 2025, has a letter of intent to invest up to $100 billion in OpenAI as it deploys at least 10 gigawatts of Nvidia systems, with the first gigawatt targeted for the second half of 2026. The Anthropic talks, if they close, would add a second lab IPO to the same chipmaker’s book.

OpenAI built a listing door it will not use

The corporate plumbing for a listing is already in place. On October 28, 2025, the nonprofit became the OpenAI Foundation and the for-profit became OpenAI Group PBC, a public benefit corporation the Foundation still controls. OpenAI said all Group equity holders own the same type of traditional stock, participating proportionally in changes in the Group’s value. It has run employee tenders and other secondaries for years, including a sale of about $7 billion of current and former employee shares at the $852 billion valuation that CNBC reported in August. It confidentially filed that draft S-1 on June 8. Saturday, Altman declined to walk through any of it.

Those holders do not need an IPO to move some paper. As of the recapitalization, the Foundation held 26%, worth about $130 billion on the then-current mark; Microsoft held roughly 27%, valued at about $135 billion on an as-converted diluted basis; current and former employees and other investors held the remaining 47%. SoftBank said in February that a commitment of more than $60 billion would give it around 13%, with more than $30 billion already invested, CNBC reported in May. OpenAI has not published a post-$122 billion ownership table for Microsoft, SoftBank, or Nvidia. None of that evidence shows that Microsoft, Nvidia, or SoftBank can freely sell their specific stakes without transfer limits or another company-approved transaction.

On March 31, OpenAI said it had closed $122 billion of committed capital at an $852 billion post-money valuation, up from the $110 billion it announced on February 27 at a $730 billion pre-money mark. That February round included $30 billion from SoftBank, $30 billion from Nvidia, and $50 billion from Amazon, with Microsoft participating as a long-term partner. Bloomberg, citing people familiar with the matter, reported on August 13 that OpenAI was on track for more than $40 billion of annualized revenue on current performance.

Reuters, citing The Information, reported that OpenAI burned $3.7 billion in the first quarter of 2026, more than half of $5.7 billion in revenue. The Information reported in February, citing internal documents, that OpenAI forecasts cash burn of $25 billion in 2026 and $57 billion in 2027. Altman named safety.

Three ARK funds hold the shares

As of Saturday, September 12, three ARK funds held OpenAI Group PBC Series C: a disruptive-innovation book CARKK at 2.69%, a next-generation internet book DARKW at 2.36%, and a fintech book DARKF at 2.75%. The three positions were valued at a combined $237 million.

etf.net grades CARKK a C, DARKW a D, and DARKF a C, each against funds making the same promise under the published method. The large AI-theme funds hold none of it. Destiny Tech100 (DXYZ), a New York Stock Exchange-listed closed-end fund, reported OpenAI at 2.6% of economic exposure as of June 30, behind Anthropic at 14.4%.

The S-1 stays on file, the tenders still clear, and the ARK funds still hold the Series C. A company that converted, recapitalized, and filed has now, on the CEO’s word, taken 2026 off the listing calendar it had already built the door for. Destiny Tech100 already carries a larger weight in the lab whose bankers have the nearer date.