Mo. Rev. Stat. § 400.8-303: Protected purchaser.

(a) "Protected purchaser" means a purchaser of a certificated or uncertificated security, or of an interest therein, who:

(1) Gives value;

(2) Does not have notice of any adverse claim to the security; and

(3) Obtains control of the certificated or uncertificated security.

(b) In addition to acquiring the rights of a purchaser, a protected purchaser also acquires its interest in the security free of any adverse claim.