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# 291 Dannine Avara $7.72B

Random fact: Asked to import hunting trophy of endangered male bontebok in 2000.


Avara and her three siblings control one-third of Enterprise Products Partners, a publicly traded midstream energy company. The Houston-based business has $68 billion in assets including about 50,000 miles of pipelines. Her father, Dan Duncan, co-founded Enterprise Products Partners in 1968 and died in 2010.

As of :
Last change +$32.1M ( +0.4%)
YTD change +$493M ( +6.8%)
Biggest asset EPD US Equity
Country / Region United States
Age 49
Industry Energy
View net worth over:   Max 1 year 1 quarter 1 month 1 week

Relative Value

Dannine Avara's net worth of $7.72B can buy ...

troy ounces of gold
barrels of crude oil

... and is equivalent to ...

of the GDP of the United States
of the total wealth of the 500 richest people in the world
of the top 100 U.S. college endowments
of the top 200 U.S. executives’ total awarded compensation
of U.S. existing home sales
times the median U.S. household income

Latest News

Net Worth Summary

Private asset
Public asset
Misc. liabilities
Confidence rating:

Dannine Duncan Avara's fortune stems from her share of stock inherited in Enterprise Products Partners, a Houston-based midstream energy business with about 50,000 miles of pipelines, according to the company's website.

Avara is a daughter of founder Dan Duncan and his wife, Jan. Following his death in 2010, Avara and her two sisters, Randa Duncan Williams and Milane Duncan Frantz, and a brother, Scott Daniel Duncan, inherited the family trusts that make the clan the largest shareholding group of the company. This analysis asserts the siblings split their father's share equally, based on his will filed in Harris County, Texas, probate court on April 14, 2010. In that document, Duncan acknowledges the four as his descendants and wills them the entities which held the vast majority of his shares without indicating any uneven split among them.

The family's interest in Enterprise Products has collected more than $9 billion in cash distributions since October 1998, according to data compiled by Bloomberg. These dividends have been adjusted for stock purchases taxes and appreciated with an allocation of 30% each in cash, U.S. bonds and large cap stocks, and 10% commodities. Dan Duncan died in 2010, when there was no estate tax in the U.S.

Of the 702 million units under family control, 93 million units are pledged as collateral by Duncan family investment vehicles and aren't included in the net worth calculation, according to the 2021 annual report filed with the Securities and Exchange Commission. Avara is credited with a quarter of the Duncan family's holdings, or about 8% of the company.

Enterprise Products spokesman Rick Rainey declined to comment on the family members' net worth calculations.


Family: Married, No children

Dannine Duncan Avara is one of four children of Dan Duncan, founder of Enterprise Products Partners. With her three siblings, she splits ownership of Enterprise Products Partners, the closely held entity that controls one-third of the publicly traded company. Her father founded Enterprise Products in 1968 -- with $10,000 and two fuel trucks -- as a natural gas liquids wholesaler.

He later expanded into crude pipelines, fuel storage and natural gas processing. By the time of his death in March 2010, he had parlayed that initial investment into a company with a market capitalization of about $31 billion. In the last decade of his leadership, the company generated an annual 20 percent return on investment. Duncan had four children with his wife, Jan, who is still alive. Randa is the oldest child, followed by Milane Duncan Frantz, then Avara. A brother, Scott Daniel Duncan, is the youngest.

In 2012, the New York Post reported one of the daughters of Dan Duncan was a victim of an extortion attempt by Vivek Shah. The indictment filed September 2012 in the U.S. District Court in the Central District of California accuses Shah of trying to extort $35 million from Avara in July 2012 by threatening to murder a relative.

Avara and her husband Thomas live in Houston, Texas.

  • 1968 Dan Duncan forms Enterprise as natural gas liquids distributor.
  • 1972 Enterprise constructs pipelines in Mont Belvieu, Texas.
  • 1980 Firm begins building 35,000 barrels-a-day fractionator in Mont Belvieu, Texas.
  • 1998 Company sells shares in an initial public offering at $22 a unit.
  • 1999 Enterprise Products acquires Tejas Natural Gas Liquids for $375 million.
  • 2010 Father Dan Duncan, Enterprise Products founder, dies.
  • 2012 Extortion attempt seeks $35 million.
  • 2015 Enterprise completes sale of offshore pipelines for $1.5 billion.