# Anthropic's S-1 filing is public, with an IPO window of late 2026 to early 2027

> Original title: Anthropic S1 is officially public 💰

- Source: Allie K. Miller
- Published: 2026-10-26T14:40:57.000Z
- Bad Influence: https://badinfluence.news/items/qicynndvjbsn5h4qdq7o9pkar
- Original: https://x.com/alliekmiller/status/2114728999763009608

## Summary

The S-1 registration statement for Anthropic's IPO is now public on the SEC's EDGAR system. Allie K. Miller estimates the IPO will fall between November 17, 2026 and February 28, 2027, based on six recent tech IPOs, excluding a withdrawal and refiling like Cerebras. She also says that an employee granted $4M in RSUs 18 months ago would now hold over $20M at today's price, with Anthropic's valuation up about 15x since last summer.

## Post

Anthropic S1 is officially public 💰 

Two of the most visible builders behind Claude Code (@trq212 and @amorriscode) left the company last week, which many believed signaled the IPO was upon us. 

Based on some AI research of 6 recent tech IPOs, assuming nothing happens like the Cerebras withdrawal and refile, we’re looking at somewhere between November 17 2026 and February 28 2027 for the IPO. 

Anthropic valuation has 15x’d since last summer. The vesting schedule is 4 years with a one-year cliff. So if you were granted $4M in RSUs only 18 months ago and left, you already have over $20M in RSUs. 

And that’s at today’s price and doesn’t factor in an IPO bump or dip. 

If you’re thinking of buying a home in SF and can afford one, you may want to snag one in the next month before thousands of new millionaires are minted (although some sellers were already accepting Anthropic and OpenAI RSUs as a form of payment).

https://www.sec.gov/Archives/edgar/data/2130357/000162828026067168/anthropicpbc-sx1.htm

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