From Longman Business Dictionary
unlistedun·list·ed /ʌnˈlɪstɪd/ adjectiveadj1FINANCE unlisted shares are in smaller companies that are not traded on the main stockmarket of a country, such as OVER-THE-COUNTER SHAREs in the USUnlisted stocks were unable to match the gains posted by New York Stock Exchange issues yesterday.
2American EnglishAmE not in the list of numbers in the telephone directorySYN BrE ex-directory