Anthropic warns some platforms can't offer its shares

Anthropic updated its website in May 2026 to warn that several private and secondary investment platforms are not authorized to offer access to its shares and that any unapproved sale or transfer will not be recognized.

The company named Open Doors Partners, Unicorns Exchange, Pachamama Capital, Lionheart Ventures, Hiive, Forge Global, Sydecar, and Upmarket. Forge said it was listed by mistake and that it only handles private share transactions with company approval.

The notice comes as more platforms market exposure to private AI companies through secondary sales, tokenized securities, derivatives, and special purpose vehicles, which Anthropic said cannot buy or transfer its stock without board approval.

🔗 Source: TechCrunch

🧠 Food for thought

Implications, context, and why it matters.

Pre-IPO tokens track value without share rights

“Tokenized securities” and “derivatives” can let buyers track changes in a private company’s valuation. They usually do not come with ownership, voting power, or dividends 1.
Trading in this crypto market tied to AI firms such as Anthropic has more than tripled since the start of the year. Some venues now offer round-the-clock leveraged bets 2.
These deals often use a Special Purpose Vehicle (SPV), a legal entity set up to hold assets such as private company shares. That setup leaves buyers exposed if the party running the structure fails 1. Anthropic says on its website that it does not allow SPVs to buy its stock and any share transfer to an SPV is void under its transfer rules 3.

Anthropic is tightening control over share access

Beyond fraud concerns, the move helps Anthropic decide who gets near its shares. That matters as the company is linked to a fresh funding round at a US$900 billion valuation 3. Anthropic stock is described as one of the “hardest” to source in secondary markets 3.
OpenAI took a similar stance in June 2025 when it rejected a third-party effort to tokenize its equity 1.
Tight limits on secondary sales also let Anthropic manage employee liquidity. That can slow exits and reduce pressure from unchecked selling in thin speculative markets 4.