Anthropic warns investors that eight private investment platforms are not authorized to sell its shares

Anthropic updated its website to name Open Doors Partners, Unicorns Exchange, Pachamama Capital, Lionheart Ventures, Hiive, Forge Global, Sydecar, and Upmarket as unauthorized to provide access to buy or sell its shares. The company stated that any sale or transfer of Anthropic stock through these firms 'is void and will not be recognized on our books and records.'

The platforms use various structures to offer exposure to Anthropic shares: secondary markets where existing shareholders sell shares, 'tokenized' securities, special purpose vehicles (SPVs, which are entities that hold stakes in private companies on behalf of investors), or derivative instruments like pre-IPO perpetual futures contracts (which track private company value without offering actual share ownership).

Anthropic prohibits both SPVs and third-party retail investment firms from acquiring its stock, citing transfer restrictions on its preferred and common stock that require board approval. The company stated that offers to invest in Anthropic's financing rounds through an SPV are prohibited.