I'll check this again later but I actually checked and Interactive Brokers does not own my shares I do. If I goes bankrupt I lose my balance in fiat (USD and Euro) but keep my stocks as they cannot be seized by creditors.
Am I totally wrong in this?
I asked about it once, and IB indeed does not own the shares, it's a specialized firm that holds it for them. On the other hand apparently that firm can loan out the stocks for shorting too, so actually its not really safe either. At least that is how I understood it.