When a company goes public, insiders and early investors usually agree not to sell their shares for a lock-up period, most often 180 days. When it ends, many shares can become available for sale, and the stock often comes under pressure around the date. This list shows NYSE and Nasdaq stocks 170 to 190 days past their IPO, with the days left to the 180-day mark. Actual lock-up terms vary; the prospectus gives the exact date.