WORLD'S TWENTIETH WEALTHIEST
Julia Koch
Widow & Heir of David H. Koch; Trustee, David H. Koch Charitable Foundation
Estimate — based on private holdings & editorial research
Julia Koch became one of the world's wealthiest people following the death of her husband David H. Koch in 2019. She inherited 42% of Koch Industries, the second-largest privately held company in the United States, which spans oil refining, chemicals, paper products, and financial trading.
Wealth in Context
Figures calculated from current net worth estimate
Julia Koch's net worth equals the annual budgets of 117 children's hospitals
Julia Koch's net worth could cover one year's school costs for every man, woman, and child in Missouri
Julia Koch's net worth could build 1,760 new public schools
Source: National Clearinghouse for Educational Facilities, 2023
Julia Koch's net worth could pay four years of college tuition for
Holdings Breakdown
| Company | Ticker | Shares | Price | Value |
|---|---|---|---|---|
International Holdings Forbes 2025 Billionaires List | foreign exchange | $88B | ||
About holdings: Wealth is primarily her inherited stake in Koch Industries, the second-largest privately held company in the U.S., with annual revenues exceeding $125 billion. Koch Industries is entirely private and includes Flint Hills Resources (refining), Invista (fibers), Georgia-Pacific (paper), and Koch Fertilizer.
Philanthropic Impact
Based on public foundation records, press releases, and giving pledges
Total known giving
$600 million
documented public giving only
Foundation
David H. Koch Charitable Foundation
David H. Koch Charitable Foundation — cancer research and arts
$500 million
estimated cumulative grants since David Koch's death in 2019
The David H. Koch Charitable Foundation continues the philanthropic legacy of David Koch, who donated more than $1.3 billion to cancer research, medical institutions, arts, and educational institutions during his lifetime. Key beneficiaries include the Koch Institute for Integrative Cancer Research at MIT, Koch theaters at Lincoln Center and NYCB, and Memorial Sloan Kettering Cancer Center.
How this is calculated
Julia Koch's public stock holdings are sourced from SEC Form 4 filings and annual proxy statements. Net worth is calculated as (shares held × current market price) + private wealth estimate. The private wealth estimate is sourced from Forbes 2025 Billionaires List and is updated periodically — it does not change with market movements. Full methodology →