There are a few reasons the stock you’re searching for might not be on Public.
First, Public does not offer stocks that are listed on the over-the-counter ("OTC") market, due to the risk associated with these types of investments. Penny stocks or companies that are listed on the OTC typically lack reliable information and liquidity and we strongly recommend learning more about the risks from the SEC here - https://www.sec.gov/investor/schedule15g.htm
Corporate actions sometimes result in new ticker symbols, making the stock a little harder to find if you aren’t familiar with the new symbol.
The great news is that we can always look into these stocks for you and see exactly what the case is for a specific stock! 😁