I am indeed another European and I do know about the issues with being a "US person". Many banks and brokers will simply immediately close your existing account or not allow you to open one.
However, are you sure that simply by owning a US company you become a US person? Because according to my understanding if you don't live in the US (and don't spend more than 4 months / year there) you wouldn't actually be tax resident in the US and therefore also not be a "US person".
However, are you sure that simply by owning a US company you become a US person? Because according to my understanding if you don't live in the US (and don't spend more than 4 months / year there) you wouldn't actually be tax resident in the US and therefore also not be a "US person".