# Duncan Family Office

Duncan Family Office is a Single Family Office based in Houston, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Houston, United States
- **Region:** North America
- **Address:** Houston, Texas, United States
- **Founded:** 1968
- **Assets under management:** Undisclosed
- **LinkedIn:** https://www.linkedin.com/company/duncan-family-office

## Regulatory record

- **Reports private funds:** No

## About

The office was founded in 1968 by Dan L. Duncan. His creation of Enterprise Products Partners supplied the core wealth that the family office now stewards. Randa Duncan Williams serves as the primary operator alongside siblings Milane Duncan Frantz, Dannine Duncan Avara, and Scott Duncan. Capital is deployed through direct co-investments and SPVs in private equity, natural resources, and real estate. Holdings include Enterprise Plaza in Houston and Double D Ranch in San Angelo, Texas. The geographic focus remains North America. Sector exposure centers on ClimateTech and Energy Transition & Renewables alongside the legacy midstream position. The team size is not publicly stated. The office maintains membership in the Private Investor Coalition and Family Office Exchange. It also supports the Dan L. Duncan Family Foundation for separate philanthropic activity. No operational changes were recorded in the last 24 months. The family office retains an operating-company relationship with Enterprise Products Partners. This link supplies proprietary access to energy assets that external allocators cannot replicate.

## Sectors

- ClimateTech
- Energy Transition & Renewables

## People

- Randa Duncan Williams — Chairman of Enterprise Products Partners and leader of the family office
- Milane Duncan Frantz — Family Member
- Dannine Duncan Avara — Family Member
- Scott Duncan — Family Member

## Questions

### Who runs investment decisions at Duncan Family Office?

Randa Duncan Williams serves as the lead operator and Chairman of Enterprise Products Partners. Investment choices remain inside the family.

### Does Duncan Family Office participate in fund commitments or only direct deals?

The office uses direct co-investments and SPVs alongside natural resources and real estate holdings.

### What sectors does Duncan Family Office target?

Confirmed focuses include ClimateTech and Energy Transition & Renewables in addition to legacy energy infrastructure.

### How is the family office related to Enterprise Products Partners?

Randa Duncan Williams chairs Enterprise Products Partners, creating an operating-company link that informs sourcing.

## Related profiles

- [Hinduja Group](https://altss.com/profile/hinduja-group-hinduja-family-office)
- [Kanoo Capital](https://altss.com/profile/kanoo-capital)

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Last updated: 2026-08-10T15:54:10.904Z

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