OpenAI Confidentially Files for IPO on the Heels of SpaceX and Anthropic

Overview

OpenAI, the maker of ChatGPT, confirmed it confidentially filed a draft S-1 registration statement with the U.S. Securities and Exchange Commission on June 8, 2026, the standard first step toward a traditional stock market listing. The filing landed about one week after rival Anthropic took the same step and around the time SpaceX moved toward its own public offering. OpenAI was last valued at $852 billion in a March 2026 round, and several analysts expect an eventual IPO valuation above $1 trillion.

Key Takeaways

OpenAI submitted a confidential draft S-1 to the SEC, which starts the regulatory review for a public listing without showing financials to the public yet.
The company has not set a listing date, and CEO Sam Altman signaled the timing stays open because some plans are easier to pursue while still private.
OpenAI was valued at $852 billion in March 2026, with analyst projections for an IPO above $1 trillion that would rank it among the largest offerings on record.
The filing follows Anthropic, which filed confidentially on June 1, 2026 at a reported $965 billion valuation, putting two top AI labs on the public-market path within days of each other.
SpaceX moved toward a public offering near a $1.75 trillion valuation around the same period, making three of the most valuable private tech firms candidates for listing at once.

Stats & Key Facts

#$852 billion: OpenAI's valuation in its March 2026 private funding round.
#Above $1 trillion: the IPO valuation several analysts project for OpenAI.
#$965 billion: Anthropic's reported valuation when it filed confidentially on June 1, 2026.
#Near $1.75 trillion: SpaceX's valuation as it moved toward a public offering.
#Roughly $3.6 trillion: Bloomberg's combined estimate for the cluster of AI-related companies preparing to go public.
#About 900 million: weekly active ChatGPT users as of February 2026.

What a Confidential S-1 Filing Means for a Company Going Public

The filing is a procedural first step, not a sale of shares.

An S-1 is the registration document a company submits to the SEC before selling shares to the public. Filing it confidentially lets the company begin the regulatory review with the agency while keeping its detailed financials private for now. The public version comes later, closer to the actual listing.

OpenAI said it has not picked a listing date and that the timing stays undecided. A confidential filing gives a company room to start the process, answer SEC questions, and decide on timing without committing to a fixed schedule.

OpenAI's $852 Billion Valuation and Trillion-Dollar IPO Projections

The numbers attached to the filing point to one of the largest offerings ever discussed.

›OpenAI carried an $852 billion valuation from its March 2026 funding round.
›Several analysts project an eventual IPO valuation above $1 trillion.
›A listing at that level would rank OpenAI among the largest companies on the U.S. market.
›OpenAI reported an annualized revenue run rate near $25 billion in early 2026, up sharply from a much smaller base two years earlier.
›ChatGPT reached about 900 million weekly active users as of February 2026.

Why OpenAI Announced the Filing Now

The company chose to confirm a step that is normally kept quiet.

CEO Sam Altman said the company expected the news to leak, so it decided to announce the filing rather than wait for it to surface. CFO Sarah Friar pointed to the size of public markets as a reason to prepare for access, noting they are much larger than private markets.

OpenAI also signaled patience. The company said a listing might take a while because there are things it wants to do that are easier to accomplish as a private business. That framing suggests the filing positions OpenAI for the public market without forcing a near-term sale of stock.

Anthropic and SpaceX Move Toward Public Markets at the Same Time

OpenAI is one of three high-value firms heading down this path together.

›Anthropic, the maker of the Claude assistant, filed confidentially with the SEC on June 1, 2026.
›Anthropic raised funds last month at a reported $965 billion valuation, slightly ahead of OpenAI's most recent private mark.
›SpaceX moved toward its own public offering at a valuation near $1.75 trillion.
›The three filings cluster the most valuable private technology firms onto the public-market path within a short span.

The $3.6 Trillion AI IPO Wave and What Drives It

The filings signal how much investor money is flowing into the sector.

Bloomberg estimated the group of AI-related companies preparing to go public is worth roughly $3.6 trillion combined. That figure reflects how investor appetite for AI has pushed private valuations to levels once reserved for the largest public companies.

The wave marks a shift in how these firms raise money. For years the biggest AI labs grew through private fundraising. Moving toward public listings opens the door for ordinary investors to buy shares, and it subjects the companies to the disclosure and reporting rules that come with being public.

What Business Readers Should Watch Next

A confidential filing starts a process with several open questions.

›Timing: OpenAI has not set a listing date, so the window between filing and a public debut stays uncertain.
›Financials: the public S-1, when it arrives, will show revenue, costs, and whether the company is profitable.
›Valuation gap: the spread between the $852 billion private mark and trillion-dollar projections will be tested by investor demand.
›Banks: reports name Goldman Sachs and Morgan Stanley among the firms working on the offering.

Frequently Asked Questions

Did OpenAI go public on June 8, 2026?

No. OpenAI filed a confidential draft S-1 with the SEC, which is the first step toward a listing. The company has not set a date for selling shares to the public.

How much is OpenAI worth?

OpenAI was valued at $852 billion in a March 2026 funding round. Several analysts project an eventual IPO valuation above $1 trillion, though the final figure depends on investor demand.

How does this compare to Anthropic and SpaceX?

Anthropic filed confidentially on June 1, 2026 at a reported $965 billion valuation, and SpaceX moved toward a public offering near $1.75 trillion. All three were preparing for public markets within a short period.

When could OpenAI's stock be available to buy?

OpenAI has not announced a listing date and said the timing stays open. Until it files a public S-1 and sets a date, no shares are available to the general public.

What is a confidential S-1?

It is a draft registration statement a company submits to the SEC to begin the review for a public listing while keeping detailed financials private for the time being. A public version follows closer to the actual offering.

OpenAI's confidential S-1 puts the maker of ChatGPT on the path to one of the largest public listings ever discussed, alongside Anthropic and SpaceX in a fast-moving stretch of AI offerings. With no date set, the financial details and final valuation remain the figures to watch.