any and all insiders file either form 144 or 4 (Restricted/unrestricted)before the sale can transact. The rules were enacted many years ago as a safeguard for investors. Insiders are generally privy to information well in advance of common shareholders. Stephen Guyer filed last month. Bear in mind he is not obligated to announce to anyone as these are his own shares. But these SEC rules make it transparent. Shareholders are responsible for their own DD, as has been pointed out many times.