There is a large variety of brokers and banks in which you can manage your portfolio. To reduce the fees and trading costs, we recommend you open an account with a leading discount broker, for example, Interactive Brokers, or with zero commission brokers like FIRSTRADE or Robinhood. You can also choose larger brokers like JP Morgan or Merrill Edge (Bank of America) that also offer cheap commission plans.
In any case, choose only an accredited broker (one that is FDIC or SIPC approved) to ensure your money is in a safe place.
Note that we have nothing to do with these brokers and we do not receive any compensation for pointing to their services.