BUX is a Dutch neobroker that offers investing in shares and ETFs, including recurring investment plans, through its website and app. Investment services are provided by BUX B.V. in Amsterdam, supervised by the Dutch Authority for the Financial Markets (AFM). Customers open an account online and invest from the app.
BUX is a subsidiary of ABN AMRO, a Dutch bank, so no foreign majority owner applies. BUX's support pages state that personal data of closed accounts is handled in accordance with the GDPR, and that retention for regulated financial services follows the MiFID II rules. The support article does not say where personal data is stored. BUX is offered as an online service rather than as software that an organisation can run itself. For a European organisation, BUX is a provider under Dutch supervision, and the storage location and processing terms should be confirmed in the client agreement.