The Netherlands Authority for Consumers and Markets (ACM) has conducted a behavioral study into the compliance programs and compliance cultures in four regulated businesses. In that study, we did not only examine whether everything was all right ‘on paper’, but employees and management, too, were asked about rules and regulations. These concerned rules and regulations that ACM enforces. The study revealed that compliance culture in the companies that were studied is in order. In a healthy compliance culture, rules and regulations are complied with, and a culture exists where doubts and mistakes are openly discussed.