Authorized but unissued stock of a corporation or previously issued shares that have been re-acquired by the corporation.
Shares of stock that were issued and later acquired by the corporation.
Shares taken from the company treasury (not the US Treasury!). Often occurs in the context of discussions about how companies fulfill share purchases within DRIP accounts.
Shares that were once issued and outstanding, but which have been reacquired by the corporation and "held in its treasury."
Formerly issued and outstanding shares that have been re-acquired by the company and not cancelled. Usually may be re-issued.
Shares of a corporation reacquired by a corporation.
But un issued stock of a company, or previously issued shares that have been re-acquired by the corporation.