Interactive Brokers LLC will hold all your money and securities. By creating an account with Smplewealth, you can also open an account with IB, and that is where your money will be held. Each Simplewealth customer has a different IB account.
Since we use IB, your assets have the same protection as if you had an account at IB. In case of bankruptcy, your cash is protected by the FSCS for up 85K GBP.
On top of that, we also get American protection through SIPC. Currently, this gives up to 500'000 USD protection, with maximum protection of 250'000 USD for stocks.
As for regulations, Simplewealth is regulated by VQF and registered with FINMA plus FINOS.