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OpenAI Files Confidential IPO Targeting $850B Valuation

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Key insights

  • OpenAI is confidentially filing for an IPO with Goldman Sachs and Morgan Stanley, targeting a September 2026 debut at a $730B to $850B valuation.
  • Anthropic filed for its own IPO on June 1 at a $965 billion valuation, setting up simultaneous AI listings in the second half of 2026.
  • OpenAI's public registration will disclose actual revenue and margins for the first time, directly testing whether its $850B valuation is defensible.

Why this matters

OpenAI's IPO registration will mark the first time its actual revenue and cost structure are disclosed publicly, giving investors and the industry a hard data point against which AI private-market valuations can be measured. With Anthropic also heading to market at $965 billion, the simultaneous listings create a direct side-by-side comparison of frontier AI economics at a scale that will either validate or deflate pricing assumptions across the entire sector. For founders, practitioners, and technical leaders, the disclosed financials from both companies will directly reset fundraising benchmarks, enterprise contract multiples, and the credibility of private AI valuations industry-wide.

Summary

OpenAI is confidentially filing for an IPO with Goldman Sachs and Morgan Stanley, targeting a September 2026 debut at a valuation of $730 billion to $850 billion. Days after Anthropic filed on June 1 at $965 billion, both companies are now headed toward simultaneous public listings. OpenAI's registration will expose its actual revenue and margins publicly for the first time, a direct confrontation with valuations that have far outrun disclosed revenue. Essentially: (OpenAI, Anthropic) are racing to public markets at sky-high valuations set without any prior public scrutiny. - OpenAI targets $730B to $850B with Goldman Sachs and Morgan Stanley as underwriters. - Anthropic filed on June 1 at $965B, with both companies targeting public listings in the second half of 2026. - A successful listing gives retail investors and index fund holders their first direct access to OpenAI equity, previously limited to venture capital. Late 2026 is now the first real public-market test of whether frontier AI valuations hold up against disclosed financials.

Potential risks and opportunities

Risks

  • If OpenAI's disclosed margins fall materially below investor expectations, the $850B valuation could face significant compression, triggering write-downs across VC portfolios holding large AI positions.
  • Simultaneous IPO filings from OpenAI and Anthropic in the same window could divide institutional demand, leaving one or both listings undersubscribed or priced below their private-market valuations.
  • Retail investors and index fund holders gaining first-ever access to OpenAI shares face downside risk if financials disappoint, given there has been no prior public data to anchor expectations.

Opportunities

  • Goldman Sachs and Morgan Stanley stand to earn landmark underwriting fees and cement their positions as lead AI sector advisors through the OpenAI listing.
  • Retail investors and index funds gain their first opportunity for direct OpenAI equity exposure, a position previously restricted to venture capital and private investors.
  • A successful dual AI IPO window in late 2026 could unlock a broader wave of AI company listings, benefiting investment banks, secondary markets, and AI-focused ETF issuers.

What we don't know yet

  • Whether OpenAI's disclosed revenue and margins will support the $730B to $850B range once the registration statement is made public under SEC review.
  • Whether simultaneous filings from OpenAI and Anthropic will split institutional investor appetite in the second half of 2026, forcing valuation cuts from either company.
  • What specific financial disclosures the confidential filing will require and when they become public ahead of the September 2026 target.