Anthropic reportedly files for IPO after $380 billion valuation

September 29, 2026 at 04:52 AM2 min

This digest was compiled by AI from multiple sources — links to the originals are below.

Anthropic has filed for an initial public offering, according to its prospectus reviewed by Reuters. The company's valuation reached $380 billion in February 2026 after a $30 billion funding round. The filing comes as Anthropic battles the U.S. government over a Pentagon supply-chain risk designation.

Key Facts

Anthropic's valuation reached $380 billion in February 2026 after a $30 billion funding round.
Amazon invested up to $4 billion in Anthropic in September 2023 and another $4 billion in November 2024.
Google agreed to invest up to $2 billion in Anthropic in October 2023.
In February 2026, President Donald Trump directed the government to stop work with Anthropic, and the Pentagon said it would declare the startup a supply-chain risk.
Anthropic filed a lawsuit in March 2026 to block the Pentagon from placing it on a national security blacklist.

Funding and Valuation

Anthropic was founded by siblings Dario Amodei and Daniela Amodei and announced a $124 million Series A round in May 2021 led by Jaan Tallinn. The company raised $580 million in a Series B round in April 2022. In May 2023, Anthropic raised $450 million from investors including Alphabet's Google and Spark Capital. Amazon announced an investment of up to $4 billion in September 2023, and Google agreed to invest up to $2 billion in October 2023. Anthropic's valuation hit $183 billion post-money in September 2025 after raising $13 billion, and then more than doubled to $380 billion in February 2026.

Product Releases

Anthropic released its large language model Claude in March 2023, competing directly with OpenAI's offerings. In March 2024, the company revealed the Claude 3 family, stating that Claude 3 Opus outperformed GPT-4 and Gemini 1.0 Ultra on various benchmarks. Anthropic unveiled the Claude 4.5 model in September 2025, with improved coding, finance, and scientific capabilities. In April 2026, Anthropic debuted Mythos, its most advanced AI model designed for defensive cybersecurity tasks.

Legal and Government Disputes

In August 2024, three authors filed a class-action lawsuit in California federal court alleging Anthropic misused their books and hundreds of thousands of others to train Claude. In February 2026, President Donald Trump said he was directing the government to stop work with Anthropic, and the Pentagon said it would declare the startup a supply-chain risk. Anthropic filed a lawsuit in March 2026 to block the Pentagon from placing it on a national security blacklist.