Unlisted Security A security that is not traded on an exchange, usually because of an inability to meet listing requirements. Investopedia Says: An unlisted security is also known as an "over-the-counter" (OTC) security. In the UK the term "unquoted" is used. Related Terms: Nasdaq National Association of Securities Dealers - NASD Over-The-Counter - OTC Over-The-Counter Bulletin Board - OTCBB Penny Stock Pink sheets Unlisted Trading Privileges Unquoted Public Company |