Anthropic files confidential S-1, eyes IPO near $965B

Anthropic filed a confidential draft registration statement on Form S-1 with the U.S. Securities and Exchange Commission on June 1, 2026. The filing begins a potential initial public offering process and references the company’s Series H post-money valuation of about $965 billion. The submission gives Anthropic the option to go public once the SEC completes its review and does not commit the company to an offering. Share count and price have not been set.

The company used the SEC’s confidential review process for late-stage private firms. That process lets companies begin registration without immediately disclosing revenue, margins or detailed risk factors. Those items typically appear in the public registration statement filed after the SEC review is complete.

Anthropic included two operational updates in the filing materials. It released Claude Opus 4.8, an upgrade aimed at coding, agentic tasks and professional workflows, and opened a new office in Milan, its sixth location in Europe. Both updates were disclosed to investors and users alongside the S-1 submission.

A secondary market for tokenized Anthropic exposure had formed before the filing. Crypto-native platforms, including Prestocks on the Solana network, issued synthetic tokens backed by special purpose vehicles that aimed to track Anthropic share exposure. Those tokens traded on decentralized exchanges such as Jupiter DEX and rose from late 2025 into April 2026; one data series showed an increase of roughly 640 percent, implying private-market valuations between about $850 billion and $1.7 trillion.

Anthropic began warning investors in February 2026 and issued a more detailed notice in May 2026 about these synthetic products. The company’s notices said any sale or transfer of Anthropic stock requires explicit board approval, that unauthorized transfers are void and will not be recognized on the company cap table, and that tokenized securities, SPVs, forward contracts and similar structures are prohibited without approval. Anthropic initially named eight platforms it said were offering unauthorized exposure, later revising the list to four and naming platforms including Hiive, Forge Global and Unicorns Exchange.

The May notice affected secondary-market prices. Tokenized pre-IPO products linked to Anthropic and comparable OpenAI-linked tokens declined roughly 34 percent to 40 percent within days of the update. Some secondary market operators disputed Anthropic’s characterization and said their arrangements had prior approval. Investors holding tokenized exposure incurred losses and face no guarantee those tokens would convert to recognized shares if an IPO occurs.

Anthropic’s confidential filing advances its public-markets process. The company reiterated that any decision to proceed with an offering will depend on market conditions. Full details on revenue, governance and risks will be disclosed when an official registration statement is filed publicly, typically weeks or months before any sale of stock.