OpenAI Files for IPO a Week After Anthropic as AI Giants Race to Wall Street

OpenAI has confidentially filed a draft registration statement with the U.S. Securities and Exchange Commission for an initial public offering, the company announced Monday. The filing comes just one week after rival Anthropic submitted its own confidential S‑1 on June 1, and days before SpaceX is set to begin trading at a $1.75 trillion valuation, according to Reuters.

The company is targeting a valuation of up to $1 trillion, though timing remains fluid. "We have not decided on timing yet; it may be a while because there are things we want to do that are likely easier as a private company," OpenAI wrote in a blog post, as reported by TechCrunch. "But it is a complicated set of tradeoffs and this gives us the option to go public sooner if that ends up being best."

OpenAI growth numbers are staggering. The company revenue growth rate is roughly 4x faster than what Alphabet and Meta achieved during the internet and mobile eras, according to Reuters. But so is its burn rate.

When a company that powers a significant portion of the developer ecosystem goes public, the incentives shift. Quarterly earnings calls replace long‑term research bets. Margin pressure can reshape API pricing. Here is what builders need to watch:

API pricing stability. Public companies answer to shareholders who expect margins. If compute costs remain high and revenue growth slows, API pricing could face upward pressure. OpenAI CFO Sarah Friar has already raised concerns about unsustainable data center costs, and is reportedly less enthusiastic than CEO Sam Altman about the accelerated IPO timeline, The Verge reported.

Codex becomes the revenue engine. With nearly $6 billion in Q1 2026 revenue and Codex growing faster than ChatGPT ever did, the coding tool is becoming OpenAI most important product. That means developer experience and tooling will get more investment — but also more monetization pressure.

Competitive dynamics shift. Anthropic filed first and is now the world most valuable startup at $965 billion. Its Claude Code tool is the fastest‑growing AI coding product. The IPO race could determine who captures scarce AI capital first — and who gets to set the narrative about what an AI company is worth.

Anthropic filed its confidential S‑1 on June 1, 2026, after a $65 billion funding round at a $965 billion valuation. The company is nearing its first quarterly profit, according to TechCrunch, and recently locked in a $35 billion chip financing deal with Apollo and Blackstone.

On secondary markets, Anthropic stock has surged to a $1 trillion valuation on Forge Global — a 123% year‑to‑date appreciation. OpenAI secondary stock has risen roughly 11.3% YTD. "OpenAI had already grown into a significant portion of its valuation," David Shapiro, CEO of OpenVC, told TechCrunch.

"What OpenAI does not want is for the public market capital to exhaust itself," Gil Luria, managing director of D.A. Davidson, told.¹ "Not only are SpaceX and Anthropic ahead of it in line to IPO, large public competitors could also raise tens of billions of dollars each in public market secondary issuances."

The confidential filing means financial details remain private for now, but the eventual public S‑1 will answer several critical questions for anyone who builds on OpenAI platform, as outlined by:⁴

• Cash burn rate: How much does it cost to train and serve models relative to revenue? This directly affects API pricing sustainability.
• Revenue mix: How much comes from ChatGPT subscriptions vs. enterprise contracts vs. API usage vs. Codex? Enterprise‑heavy revenue means stickier customers.
• Unit economics: What is the cost per token generated vs. revenue per token? Unlike traditional SaaS, generative AI incurs compute costs for every response.
• Risk factors: OpenAI executives have acknowledged the technology could enable bioweapons, massive cyberattacks, or even existential threats. The S‑1 must disclose these as material risks.

The convergence of SpaceX, Anthropic, and OpenAI IPOs within months of each other represents what ¹ calls "the most consequential test of investor appetite for high‑growth technology stocks in the last 10 years." The global IPO market has raised $87.5 billion through May 2026 — the highest since 2021 — and these three offerings alone could reshape capital flows for years.

For builders, the public market moment matters because it determines how much capital flows into AI infrastructure, how aggressively companies compete on developer tools, and whether the companies that define the AI era are accountable to users or shareholders. With OpenAI confidential filing, that question is now one step closer to being answered.