Bloomberg Billionaires Index

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# 15 Julia Flesher Koch & family $65.5B

Random fact: Husband survived a 1991 airplane collision on runway.


Flesher Koch is the widow of David Koch, a former executive and co-owner of Koch Industries, one of the largest closely held companies in the US by revenue. The Wichita, Kansas-based conglomerate operates in oil refining, pipelines, commodities trading, ranching and paper pulp, and has annual revenue of about $125 billion.

As of :
Last change +$379M ( +0.6%)
YTD change -$1.56B ( -2.3%)
Biggest asset Koch Industries cash & short term assets
Country / Region United States
Age 60
Industry Industrial
View net worth over:   Max 1 year 1 quarter 1 month 1 week

Relative Value

Julia Flesher Koch & family's net worth of $65.5B 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:

Flesher Koch's fortune is derived from the inheritance of her late husband's 42% stake in Koch Industries, a closely held industrial conglomerate. Koch Industries is one of the largest closely held companies in the US and has annual revenues of about $125 billion, according to a person familiar with the company's results.

David Koch died in August 2019. Flesher Koch & family are credited in this analysis with all of the shares previously held by David Koch. "David’s shares remain with his family," Koch spokeswoman Christin Fernandez said in an email on Aug. 23, 2019.

Revenue for Flint Hills Resources and Koch's chemicals business, as well as Koch Pipelines and Koch Fertilizer, is estimated to have been about $44 billion in 2021 by comparing their reported production capacities with select industry peers.

Based on information from credit reports and people familiar, paper and pulp producer Georgia-Pacific had $20.8 billion of revenue, and polymer and fiber producer Invista had revenue of $3.8 billion. Electronic components manufacturer Molex had revenue of $7.9 billion. Glass manufacturer Guardian Industries had revenue of $5.25 billion.

Infor Global Solutions, an enterprise software company, had earnings of $770 million and is wholly owned by Koch after its acquisition was completed in April 2020.

In addition, $40 billion in cash, miscellaneous investments and land is held by the Koch Industries parent, based on Moody's reports stating that the company has a zero net debt position and information provided by a person familiar.

The billionaire declined to comment on her net worth through Koch spokesman Christin Fernandez in June 2022.


Family: Widowed, 3 children

Julia Flesher was born in Indianola, Iowa in 1963. Her family owned a furniture store on Highway 92, according to a 1998 New York Times report. She moved to Arkansas eight years later when her parents opened a clothes store in Conway, north of Little Rock.

She attended the University of Central Arkansas before taking a job as an assistant to fashion designer Adolfo Sardina.

She met David Koch on a blind date in January 1991. The pair married in 1996 and had three children. David Koch died on Aug. 23, 2019.

  • 1963 Julia Flesher is born in Iowa.
  • 1991 Goes on a blind date with David Koch.
  • 1996 Marries David Koch.
  • 2019 David Koch dies.