One of the leading providers of statutory health insurance in Germany is a collection of companies known as Bundesverband der Betriebskrankenkassen, otherwise known as BKK. Of the more than 250 providers of statutory health insurance, 188 belong to BKK. These independent non-profit corporations insure more than 14 million people. To enable the insurance companies to better understand costs and benefits, BKK created an enterprise data warehouse (EDW) called BKK InfoNet based on Teradata Warehouse technology. Data from as many as 2 billion claims per year is stored in the EDW; each of the insurance companies can review and analyze their data at various levels of detail, while security measures protect the privacy of individuals and the competitive information of other organizations. Nevertheless, each insurance company can benchmark its business against the anonymous, but detailed information of the remaining companies. The resulting insight has helped BKK and its insurance companies to increase customer membership by 45%, decrease costs, and enhance service efficiency.