Arrayit Corporation (ARYC)

[MikeCr]

There are dozens of stock brokerage houses in the United States. But four major firms stand out because of their name, offerings, their total amount of client assets, and the number of clients they serve. They are often referred to as the "big four brokerages." Each of these firms—Charles Schwab, Fidelity Investments, E*TRADE, and TD Ameritrade—comprise the top in terms of customers and assets.

I saw somewhere that Schwab is also restricting the buying of CE tocks effective Jan 31 2021. (But Schwab and TD Ameritrade merged recently)

So the top 4 now 3 brokerage houses will ban it. But how about the dozens of other brokerage houses?