> Both our preferred stock and common stock are subject to transfer restrictions contained in our bylaws. Any sale or transfer of Anthropic stock, or any interest in Anthropic stock, that has not been approved by our Board of Directors is void and will not be recognized on our books and records. This means that if someone purports to sell Anthropic shares without proper board approval, that transaction is invalid. The purported buyer would not be recognized as a stockholder of Anthropic and you would have no stockholder rights.
If you trust the other party, you can always write a derivative contract. If the other party was long, their position is closed. If they weren't, they're short now.