Anthropic PBC issued a comprehensive warning to investors regarding unauthorized secondary market platforms claiming to offer access to company shares. The Claude maker specifically named eight firms violating its transfer restrictions, declaring all such transactions void. (TechCrunch, May 12, 2026)
The unauthorized platforms. Anthropic flagged Open Doors Partners, Unicorns Exchange, Pachamama Capital, Lionheart Ventures, Hiive, Forge Global, Sydecar, and Upmarket as violating transfer restrictions. The company's statement makes clear: "Any sale or transfer of Anthropic stock, or any interest in Anthropic stock, offered by these firms is void and will not be recognized on our books and records."
Market scale and response. CoinCentral reports that tokenized products linked to Anthropic shares fell roughly 45% following the warning. TechCrunch reported that Unicorns Exchange had received more than 50 inquiries from institutional investors, with aggregate demand that exceeded $1tr.
Platform responses. Forge Global stated it was working with Anthropic to remove its name from the alert: "Forge does not facilitate transactions in any private company's shares without the explicit approval of the company." Unicorns Exchange ceased offering Anthropic shares following the blog post. Hiive maintained that all share transfers are approved by the issuer.
The funding context. The crackdown comes as Bloomberg reports Anthropic is in early talks to raise at least $30 billion at a valuation of more than $900 billion, potentially its largest funding round to date.
Transfer restrictions. Anthropic explicitly prohibits special purpose vehicles (SPVs) from acquiring company stock, with any transfers to SPVs considered void under transfer restrictions. The company has also warned against fraudulent activities involving fake share certificates and cryptocurrency payment schemes.
Verification status. All financial claims and platform responses are sourced from company statements to media outlets. The aggregate demand figure of $1 trillion comes from Unicorns Exchange statements to press. No independent audit of secondary market demand has been conducted.