It is best to scour government websites that have authority over stocks and trusts transactions.
Because the government has the ultimate authority to give permits in start-up corporations and other businesses, it is best to start your search in government websites and work on from there.
You can start with the Securities and Exchange Commission (SEC) website. You can also visit the websites of Financial Industry Regulatory Authority (FINRA), Bureau of the Public Debt, Commodity Futures Trading Commission (CFTC), and National Futures Association (NFA).