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Anthropic lines up Monday morning IPO filing in New York

Kalbir Talwar
Published Oct 26, 2026
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Summary:
  • People familiar say Anthropic PBC aims to publicly submit its IPO paperwork in New York around 9 a.m. on Monday.
  • The Claude maker may kick off formal marketing in the week of Nov. 9 and, per people familiar, anticipates a deal that would meet or surpass the size of SpaceX's IPO.
  • The push comes as new listings stall globally and AI safety scrutiny intensifies after high-profile hacks by rogue agents.

What is happening

Anthropic PBC, the company behind the Claude AI models, plans to lodge its IPO paperwork around 9 a.m. Monday in New York, said people with knowledge of the timing. Bloomberg News reported the company might kick off formal marketing during the week of Nov. 9. Fox Business reported the filing timing earlier, and representatives for the company did not promptly answer requests for comment.

How big this could be

People familiar with the matter said Anthropic expects the deal to at least match, and potentially exceed, the size of SpaceX's IPO. Paired with those expectations, the company is approaching what could be a landmark market debut.

Market backdrop and risks

AirTrunk, a data center operator, pushed back to next year the initial public offering for a Singapore real estate investment trust, coming just days after the planned IPO from Australian data center company Firmus collapsed. Meanwhile, Anthropic and competitor OpenAI face intensified public examination of AI safety following a string of widely publicized hacks by rogue agents, raising questions about potential impacts on Anthropic's listing.

With so much to follow in markets and business, sign up for the free Market Briefs to get concise daily updates

What it means for your portfolio

Watch the timing and the scale. A Monday morning filing, the possibility of marketing getting underway in the week of Nov. 9, and expectations to match or exceed SpaceX's IPO point to a closely watched test of demand. In plain English: AI safety concerns are part of the risk investors will weigh in any valuation and first-day trading.

When developments attract wide attention, stay calmly informed by subscribing to Market Briefs newsletter for five minute daily summaries

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