OpenAI Takes First Formal Step Toward Public Offering

The announcement was made pursuant to Rule 135 under the Securities Act of 1933, a standard mechanism for companies to disclose confidential filings without triggering an actual offering . OpenAI offered no specifics on the number of shares to be offered or the price range.

A Reluctant Race to Wall Street

The filing arrives in the wake of Anthropic's own confidential S-1 submission just one week earlier. Anthropic, the maker of the Claude chatbot and OpenAI's fiercest competitor, filed its paperwork with the SEC on June 1, 2026, at a valuation of roughly $965 billion following a $65 billion Series H funding round .

Anthropic's move triggered intense Wall Street scrutiny and immediately raised questions about whether OpenAI would follow . It did, but not without its CEO publicly pumping the brakes on any notion of a winner-take-all race.

Altman: 'We'll Do It When It Makes Sense'

Speaking to CNBC's David Faber on "Power Lunch" hours after Anthropic's filing, OpenAI CEO Sam Altman rejected the framing of an IPO competition. "I think there is a race to deliver the best technology and build the best business," Altman said. "But, you know, going public is a financing event, and I don't think that's one that we're focused on the timing of. We'll do it when we think it makes sense" .

Altman further argued that the AI market will ultimately support a "system of multiple providers" rather than a single dominant champion . His comments signal that OpenAI views the current moment as a marathon of technological innovation, not a sprint to a stock ticker.

This reticence aligns with Altman's long-held personal ambivalence about public markets. In a late 2025 appearance on the "Big Technology Podcast," he famously rated his excitement about being a public company CEO at "0%," acknowledging the inevitable annoyances of quarterly earnings and shareholder pressure, even as he conceded OpenAI would likely need to go public eventually to secure the massive capital required for its AI ambitions .

Reports from earlier in 2026 indicated OpenAI CFO Sarah Friar had raised internal concerns about the readiness and risks of Altman's plan to target a late-2026 listing, particularly regarding heavy infrastructure spending and whether slowing revenue growth could support such commitments . The confidential filing appears to keep all options open without locking the company into a near-term debut. Reports suggest a public debut in the fall of 2026 is possible, with Goldman Sachs and Morgan Stanley serving as joint bookrunners, but no final decisions have been made .

The Bigger Picture: A Trio of Mega-IPOs

OpenAI and Anthropic are two-thirds of a historic wave of AI IPOs anticipated in 2026. The third member of the group is SpaceX, which confidentially filed its own paperwork in April . Together, the three filings represent a potential reordering of technology's place in the public markets, but all have proceeded cautiously, using confidential filings that keep sensitive financial data private during the SEC review process.

For OpenAI, the confidential S-1 not only opens the door to a Wall Street debut but also sets up a future moment of truth: the eventual public registration statement will, for the first time, disclose the company's actual revenue, margins, and cost structure, directly testing whether its immense private-market valuation is defensible .