As used in this article, "share" means:

(1) any share or similar security, any certificate of interest, and participation in any profit sharing agreement, any voting trust certificate, or any certificate of deposit for a share; and

(2) any security convertible, with or without consideration, into shares, or any warrant, call, or other option or privilege of buying shares without being bound to do so, or any other security carrying any right to acquire, subscribe to, or purchase shares.