ANTHROPIC SECRETLY FILES FOR IPO AT NEAR-TRILLION DOLLAR VALUATION — THE BIGGEST AI STOCK RACE IN HISTORY IS ON Anthropic quietly submitted a confidential draft registration statement to the Securities and Exchange Commission on June 1, 2026, taking the first formal step toward an initial public offering. The company has not set a price range, share count, ticker symbol, or listing date. All of those details come later. What it has done is alert the market that the company behind Claude intends to go public, and the number attached to that intention is staggering. Anthropic’s current valuation sits at roughly 965 billion dollars following a 65 billion dollar Series H fundraise that closed just days before the filing. The round was co-led by Altimeter Capital, Dragoneer, Greenoaks, Sequoia Capital, Capital Group, Coatue, and D1 Capital Partners. Institutional investors who typically wait for public markets piled in at pre-IPO prices, which tells you something about their confidence that this offering will be oversubscribed. The filing lands in what is already the most extraordinary IPO season the technology industry has ever seen. SpaceX raised 75 billion dollars in its listing and closed its first day at a 19 percent gain. OpenAI, which raised 122 billion dollars in March at an 852 billion dollar valuation, is expected to file its own S-1 shortly. Three companies, each valued near or above a trillion dollars, all going public within roughly the same window. The market is being asked to absorb a level of AI valuation concentration that has no historical precedent. Whether institutional and retail investors can sustain that demand is the question the next six months will answer. Keywords: Anthropic IPO filing, AI company valuation, Claude AI stock, S-1 SEC filing