A self-tender offer is a strategic financial maneuver used by companies to purchase a portion of their own stock from shareholders, often to thwart hostile takeover attempts.
A stock buyback, also known as a share repurchase, is a process where a company purchases its own shares from the marketplace, reducing the number of outstanding shares.
Treasury stock refers to shares of a company's own stock that have been reacquired by the company itself, subsequently reducing the number of shares available in the open market.
