unlisted security — некотируемая ценная бумага
The Unlisted Securities Market (USM), which ran from 1980 to 1996, was a stock exchange set up by the London Stock Exchange.
unlisted stock — некотируемая акция
It is much easier to sell active or listed stocks than to sell inactive, unlisted stocks.
unlisted share — некотируемая акция
unlisted bond — некотируемая облигация
Therefore, a very good rule to follow is to confine one's purchases of unlisted bonds to such as are wanted for a permanent investment, and not buy unlisted stocks.
unlisted company — не включенная в листинг компания
If a listed company holds more than 10% of an unlisted company's shares, the latter may not hold more than 2% of the former's shares.
unlisted firm — не включенная в листинг фирма
Furthermore, this notification is not required if the direct investment involves acquisitions of less than 10% of the stock of an unlisted firm.
Англо-русский экономический словарь.