Will OpenAI or Anthropic IPO first?
Anthropic is positioned to IPO before OpenAI due to its earlier SEC filing, October 2026 target debut, and willingness to proceed at a $965 billion valuation, while OpenAI delays to 2027 to secure a $1 trillion floor.
Analysis
Anthropic has secured a procedural head start by confidentially filing its S-1 with the SEC on June 1, 2026, one week before OpenAI's June 8 filing, giving it priority in the regulatory review process. Reports consistently indicate Anthropic targets an October 2026 Nasdaq debut, whereas OpenAI is leaning toward a 2027 listing to meet Sam Altman's condition of a $1 trillion valuation floor. With Anthropic valued at $965 billion and appearing more willing to proceed at its current valuation, expert consensus from sources like Morningstar and Yellow suggests Anthropic will likely be the first pure-play frontier lab to go public if OpenAI delays.
The current market price of 82% for 'Yes' aligns with the prevailing narrative but appears slightly understated given the concrete timeline advantages Anthropic holds. The one-week filing gap, the specific October 2026 target versus OpenAI's vague 2027 window, and OpenAI's explicit refusal to list below $1 trillion create a high-probability scenario for Anthropic winning this race. While no official listing date is confirmed and market conditions could shift timelines, the structural and strategic differences between the two companies make an Anthropic-first IPO the most probable outcome, suggesting the market may be underpricing the certainty of this sequence.
Arguments
For
- Anthropic's earlier SEC filing gives it a procedural advantage in the IPO review process
- OpenAI's explicit $1 trillion valuation requirement creates a high barrier that likely pushes its IPO into 2027
- Multiple expert sources and analysts state Anthropic will likely go public first if OpenAI delays to 2027
Against
- The October 2026 target for Anthropic is not confirmed and could change based on market conditions
- OpenAI has the option to monitor investor reactions to Anthropic's IPO before committing to its own pricing
- Regulatory review timelines are uncertain and could delay Anthropic's debut beyond the fall 2026 window
Key drivers
- Anthropic filed its SEC S-1 one week before OpenAI, securing a regulatory head start
- Anthropic targets an October 2026 IPO while OpenAI aims for 2027 to hit a $1 trillion valuation
- OpenAI CEO Sam Altman is refusing to list unless the $1 trillion valuation floor is met, delaying its timeline
Risk factors
- No official IPO date has been confirmed by either company, leaving October 2026 as a target rather than a guarantee
- OpenAI could accelerate its timeline if market conditions allow it to reach the $1 trillion valuation sooner than expected
- Unexpected regulatory delays or adverse market conditions could postpone Anthropic's October debut
Scenarios
Best case
Anthropic successfully lists in October 2026 at a valuation above $1 trillion, while OpenAI faces further delays due to valuation negotiations, cementing Anthropic as the clear first IPO.
Most likely
Anthropic proceeds with its October 2026 IPO at approximately $965 billion to $1 trillion valuation, while OpenAI delays its listing to 2027 to meet its valuation floor, resulting in Anthropic going public first.
Worst case
Market conditions deteriorate significantly in late 2026, forcing Anthropic to postpone its IPO, while OpenAI unexpectedly secures a $1 trillion valuation and lists in early 2027, reversing the expected order.
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