Best-Price Rule (Rule 14D-10) An SEC regulation that stipulates that a tender offer is open to all security holders of that class of security and the amount paid to the security holder is the highest paid to any other holder of the same security. Investopedia Says: Having a premise similar to that of the all-holders rule, the best-price rule facilitates equality for shareholders and their tendered shares. Related Terms: All-Holders Rule Hostile Takeover SEC Shareholder Takeover Tender Offer |