GiveRate / All records / Forbes 400 (Sept. 2026) / James Duff
James Duff
Under 1%
James Duff has given an estimated under 1% of current net worth ($4.5B), based on Forbes' philanthropy score.
- GiveRate
- Under 1%
- Net worth
- $4.5B
- Stated lifetime giving
- Not stated
- Forbes 400
- #380 · Tires, diversified · Hattiesburg, Mississippi
- Status
- Source-reported range
- Sources
- Forbes 400 profile · Sept. 2026
The math
Forbes philanthropy score 1 of 5: lifetime giving is under 1% of current net worth. The range is Forbes' own banding; GiveRate shows it as published.
Profile
- Age
- 65
- Residence
- Hattiesburg, Mississippi
- Industry
- Diversified
- Source of wealth
- Tires, diversified
- Self-made
- Yes
- One-year change
- $4.1B (#362) in Sept. 2025 to $4.5B (#380) in Sept. 2026, a gain of 10%.
What the range means in dollars
Forbes gives James Duff a philanthropy score of 1 out of 5, meaning lifetime giving equals under 1% of current net worth. On a $4.5B fortune, that implies lifetime giving of less than $45M. 177 of the 400 share this score and 206 score higher.
For scale: under 1% of a $50,000 household income would be under $500.
Others in Diversified
- Julia Koch & family: 1–5% · $84.6B
- Charles Koch & family: 1–5% · $76.9B
- Len Blavatnik: ≥2.8% · $35.2B
- Elaine Marshall & family: Under 1% · $32.2B
- Edythe Broad & family: ≥36.4% · $7.0B
- Phil Ruffin: Under 1% · $5.3B
Others in Mississippi
- Thomas Duff: Under 1% · $4.5B
Questions
How much has James Duff given to charity?
Forbes scores James Duff 1 of 5 for philanthropy, meaning lifetime giving of under 1% of net worth, less than $45M on a $4.5B fortune.
What is James Duff's net worth?
Forbes estimates $4.5B as of September 2026, ranking #380 on the Forbes 400.
What is James Duff's GiveRate?
Under 1%. GiveRate is lifetime giving as a share of wealth, built from published Forbes figures. See giverate.org/methods/ for the method.
GiveRate is an estimate built only from the published figures above. Wealth and giving totals are themselves estimates. See methods. Spot an error? Request a correction. See all Forbes 400 (Sept. 2026) · Open in the interactive rankings · Calculate your own GiveRate