Wyo. Stat. § 26-25-102: "Equity security" defined.

(a) As used in this chapter "equity security" means:

(i) Any stock or similar security;

(ii) Any security convertible, with or without consideration, into stock or a similar security, or carrying any warrant or right to subscribe to or purchase such a security;

(iii) Any warrant or right to subscribe to or purchase stock or a similar security; or

(iv) Any other security which the commissioner deems to be of similar nature and considers necessary or appropriate to treat as an equity security, by rules and regulations he prescribes, in the public interest or for the protection of investors.