Unlisted stocks, also known as private company stock or OTC (over-the-counter) stocks, are not traded on a public exchange like the NYSE or NASDAQ. These stocks are typically sold through private transactions or through private markets, such as the Pink Sheets or OTC Markets. In order to purchase unlisted stock, you will need to find a seller and negotiate a price directly. This can be difficult as there is often less information available about the company and its financials. It is important to do your due diligence and research the company and its management team before making a purchase. Additionally, you should consult a financial advisor or professional before making any investment decisions.