Unissued stock

Unissued stock is stock that has been authorised in a companies charter, but has never been sold. It differs from Treasury stock (in the UK, Treasury shares, as treasury stock means something else), in that treasury stock has been issued, and bought back by the company, where as unissued stock has never been issued.
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Shares which are authorized in a corporation's charter, but are not issued.

Shares of a corporation's stock that are authorized in its charter but not issued.