Duncan Family Office is a multi-generational single-family office headquartered in Houston, Texas. The Office operates as a division of Enterprise Products Company and provides in-house investment management, asset-allocation advice, investment due diligence and real estate management for the descendants of Dan L. Duncan. The Office executes investment activity through family investment entities and an internal private-markets team, with explicit real-estate management capability and links to energy-sector holdings through Enterprise Products Company. The Office reported regulatory assets under management in excess of $100 million. Public records note historical family ownership of the Double D Ranch, a roughly 5,000-acre hunting property in Texas. Duncan Family Office maintains a small internal investment team and centralized administration for family investment entities. Distinctive features are its status as a long-term, multi-generational family office operating inside a major energy company, combined with in-house real estate management and centralized management of family investment vehicles.