Duncan Financial Group

The fortune originates from Enterprise Products Partners, the midstream energy company Dan Duncan co-founded in 1968. Enterprise grew into one of the largest publicly traded pipeline partnerships in North America, with a network of pipelines, storage terminals, and processing plants serving oil and gas producers. Duncan owned a substantial majority stake at the time of his death in 2010.

The office is governed by the Duncan family, including Dan Duncan's four children who inherited the Enterprise Products Partners stake. His widow, Jan Duncan, and a close circle of long-time advisors from Enterprise are understood to guide strategy. Specific investment committee membership is not publicly disclosed.

Yes, though energy and energy-adjacent infrastructure remain the core competency. The office also deploys into direct real estate, private credit opportunities, and select fund commitments. However, the family's edge — deep operating knowledge of midstream assets — means non-energy investments are typically scaled down relative to the energy book.

The family office operates as a separate entity from Enterprise Products Partners. It manages the family's liquid wealth and dividends from their Enterprise stake, which has been held for decades. Duncan family members collectively own roughly 32% of Enterprise's common units, providing a continuous stream of capital to the family office.

The office engages in both direct transactions and fund commitments, though direct deals — especially in energy infrastructure and real estate — appear to represent a larger share of activity. Fund commitments tend to focus on niche energy credit, natural resources, and Texas-based real estate managers where the family has existing relationships.