The invention is business intelligence system and method for multi-faceted aggregation and analysis of property ownership which enables the identification and classification of individuals and corporate entities for use in generating product and service marketing lists/groups. The inventions application provides its users with a knowledge base about clients and potential clients and allows users to customize their output by applying their own analytics to the inventions base results. The system can provide input to automated marketing systems or interactive decision support systems that support the real estate, mortgage, accounting, or legal or other professions.