This type of stock includes voting rights.

Common stock provides shareholders with voting rights, allowing them to participate in important company decisions, such as electing the board of directors or approving significant corporate policies. This characteristic makes common stock a critical component for many investors who wish to influence the company's direction. In addition to voting rights, common stockholders may benefit from potential price appreciation and dividends, although dividends are not guaranteed.

On the other hand, treasury stock refers to shares that a company has repurchased and are not available for public trading, and therefore, do not confer any rights to vote. Preferred stock typically does not come with voting rights, as it is designed to provide fixed dividends and priority over common stock in the event of liquidation. Buyback stock is another term that refers to shares repurchased by the issuing company, which also lacks voting rights. Thus, common stock stands out as the type of stock that includes voting rights, distinguishing it from the others mentioned.