Anthropic IPO buzz

Anthropic has become Wall Street’s newest artificial-intelligence listing rumor, with traders betting it could reach public markets before OpenAI. (sec.gov) (kalshi.com) The company has not publicly filed an S-1 registration statement with the Securities and Exchange Commission, and Anthropic’s SEC page still shows a private-company Form D filing from February 24, 2026 rather than IPO paperwork. Companies can submit draft registration statements for nonpublic review before any public filing appears. (sec.gov 1) (sec.gov 2) What changed this week was the financing backdrop. Amazon said on April 20 it would invest up to $25 billion more in Anthropic, while Anthropic committed to spend more than $100 billion on Amazon Web Services over 10 years and secure up to 5 gigawatts of Trainium chip capacity. (aboutamazon.com) (cnbc.com) That deal landed after Anthropic closed a $30 billion funding round at a $380 billion valuation in February 2026, according to CNBC. Bloomberg then reported on April 14 that investors had floated new offers that could value the company at about $800 billion or more, though no new round had been announced. (cnbc.com) (bloomberg.com) Those numbers matter because an initial public offering is a stock-market debut, and private valuations often shape expectations for what price public investors might pay. Bloomberg reported on March 26 that Anthropic was considering an IPO as soon as October 2026, putting it on a similar timetable to other closely watched private listings. (bloomberg.com) Prediction markets have turned that timeline into a live wager. Kalshi’s IPO contracts recently showed Anthropic with higher odds than OpenAI of officially announcing an IPO this year, and separate contracts put Anthropic slightly ahead on announcing before November or December 2026. (kalshi.com) OpenAI remains the obvious comparison because both companies sell large language models and both are raising money at enormous valuations. Bloomberg reported this month that some investors were using trillion-dollar IPO assumptions to justify OpenAI’s latest financing, while Anthropic’s lower private valuation looked cheaper by comparison. (msn.com) There is also a reason to be cautious about the chatter. Confidential SEC submissions are not public when they are first made, valuation talk can come from unsolicited investor offers rather than an active round, and prediction markets reflect trader positioning rather than company guidance. (sec.gov) (bloomberg.com) (kalshi.com) For now, the hard facts are narrower than the social-media buzz: Anthropic has fresh Amazon backing, a recently reported $380 billion valuation, and reported interest in a possible October listing. Until a public filing appears, the IPO race is still being run mostly in private and priced mostly in rumor. (aboutamazon.com) (cnbc.com) (bloomberg.com)