Anthropic Blacklists Eight Secondary Platforms Over Sales

Anthropic has blacklisted eight secondary market platforms, including Open Doors Partners and Unicorns Exchange, and warned that unauthorized sales of its stock will be void unless the company’s board approves the transfers.

The company identified the platforms after finding offers marketing access to Anthropic equity. Anthropic noted both its preferred and common shares carry strict transfer restrictions and that its cap table will not change unless transfers receive board sign-off.

Anthropic explicitly barred special purpose vehicles from acquiring its stock. SPVs pool investor capital to buy a single asset; the company instructed that offers structured through SPVs should be disregarded.

The notice also flagged tokenized securities tied to Anthropic shares as potential fraud, warning that tokens circulating on secondary markets do not provide an enforceable claim on the company’s stock, including rights to dividends or voting.

Investors who purchased through the named platforms or similar services were told those transactions are void and will not be honored. Buyers may have received only a receipt or a digital token while official ownership records remain unchanged.

Private company stock transfers typically require documentation and board approval to record a purchaser as a shareholder. Without those steps, a transfer is only an agreement between private parties and does not change the company’s official ownership records.

Anthropic instructed prospective buyers to disregard offers on the named platforms, SPV arrangements, or tokenized offerings unless the board provides formal approval for the transfer.