[Anthropic: Stock transactions without board approval are invalid; caution against investing via SPVs and tokenized securities] Deep Tide TechFlow reports that on May 12, Anthropic stated that any transfer of company stock or related interests without board approval is invalid and will not be recorded in the company's books. Anthropic explicitly prohibits SPVs from acquiring its stock and noted that offering exposure to Anthropic equity through SPVs, forward contracts, tokenized securities, and similar methods may constitute fraud or be rendered worthless due to transfer restrictions. Anthropic also named entities such as Open Door Partners, Unicorns Exchange, Pachamama, Lionheart Ventures, Hiive, Forge, Sydecar, and Upmarket as unauthorized parties trading its shares and warned investors to be cautious of hard-to-trace payment methods like cryptocurrency and wire transfers.