Anthropic warns 8 platforms against unauthorized share sales

Anthropic has publicly named eight unauthorized platforms that claim to offer access to its shares, including Open Doors Partners, Unicorns Exchange, Pachamama Capital, Lionheart Ventures, Hiive (new offerings), Forge Global (new offerings), Sydecar, and Upmarket. The company states that any sale or transfer of its stock through these firms is void and will not be recognized on its books. Forge Global disputes its inclusion, claiming it only facilitates issuer-approved transactions. Sydecar says it acts only as an administrative agent, not a seller.

The warning comes as interest in Anthropic’s shares surges, with the company reportedly raising funds at a $900 billion valuation. Secondary market brokers call Anthropic one of the ‘hardest stocks to source.’ Anthropic explicitly prohibits special purpose vehicles (SPVs) and forward contracts, which are derivatives tied to its stock without actual ownership. It also warns that third-party platforms claiming to sell its shares directly or via forward contracts are not authorized. The move aims to protect investors from fraudulent or void transactions.