# Anthropic confidentially files for U.S. initial public offering.

*genai · news · 2026-06-01 · Reuters*

## Key points

- Anthropic has confidentially filed for a U.S. initial public offering.
- Anthropic aims to go public ahead of OpenAI and SpaceX's planned IPOs.
- SpaceX is pursuing a $1.75 trillion valuation in its upcoming IPO.
- OpenAI is also planning to confidentially file for a U.S. IPO within weeks.

June 1 - Anthropic said on Monday it has confidentially filed for ​a U.S. initial public offering, as ‌the Claude chatbot maker races with arch rival OpenAI to go public in what would ​be one of the biggest IPOs ​of all time. The move comes ahead of SpaceX's ⁠mega IPO, which is set to ​rewrite the record books as the Elon ​Musk-led company pursues a $1.75 trillion valuation. Sign up here. If SpaceX raises the $75 billion it wants, the IPO would eclipse the world's largest to ​date, which was oil major Saudi ​Aramco's listing in 2019. ChatGPT-maker OpenAI is also preparing to ‌confidentially ⁠file for a U.S. initial public offering in the coming weeks, Reuters had reported in May, citing a source familiar with ​the matter. Here ​is ⁠an overview of the biggest IPOs globally, ranked by deal size: ​Source: Renaissance Capital Compiled by Manya ​Saini and Arasu Kannagi Basil in Bengaluru; Editing by ​Shinjini Ganguli, Maju Samuel and Sahal Muhammed

**Companies:** SpaceX, OpenAI, Anthropic
**Countries:** United States

[Read the full story on Reuters](https://www.reuters.com/legal/transactional/saudi-aramco-alibaba-worlds-biggest-ipos-2026-06-01/)

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