Thomas Duff
Profile Summary
Thomas Duff is a U.S.-based billionaire born in 1956, associated with Mississippi and the diversified industry. He has an estimated net worth of ~$4.5B RTB.
Business & SEC Activity
SEC records identify Thomas Milton Duff in filings connected to Frozen Food Express Industries Inc. His recent filings include a Form 3 filed in 2018, which is an initial statement of a corporate insider’s holdings, and five Schedule 13D or 13D/A filings from 2013, which report and amend disclosures of beneficial ownership in a company’s shares SEC EDGAR.
Philanthropy
Three entities named Duff Family Foundation reported combined assets of $1,128,330 and grants paid of $266,762 in their listed tax filings. The Mississippi foundation reported $917,577 in assets and $4,512 in grants paid for tax year 2023; the Ohio and Florida foundations reported grants paid of $246,250 in 2020 and $16,000 in 2019, respectively ProPublica 990.
Political Activity
FEC data show at least 100 federal contributions in the most recent 100 records on file, totaling $5,748.72 and covering February 28 through July 31, 2026 only. That sampled total included $3,088.46 to Democratic recipients, $1,716.36 with unknown party affiliation, $500 to Independent recipients, $250 to Republican recipients, and $193.90 with no party listed; the largest listed recipients were ActBlue ($1,616.36), Citizens for Brad Smith ($1,500), and Quincy Bareebe for Congress ($1,250) FEC.
These donations are matched to this person by name only, so some may belong to a different person with the same name: FEC filings can include a donor's employer and city, but our matching does not check them against what we know about this person.
U.S. Presence
Philanthropy
Foundations are matched to a person by name, not by trustee records — so a same-surname family foundation can land here in error. Every entity below links to its full IRS filing; if one doesn’t belong, tell us at hello@skylarkcreations.com and we’ll pull it.
Political Contributions
These figures cover the 100 most recent of 4,892 federal contributions on file, not the full record. The total, party split, top recipients and dates below are all computed over that sample, so each is a floor rather than a complete figure.
By Party (in the sample)
Every party in this sample is listed here. The bars are rounded for display; unrounded they total exactly $5,748.72.
Top Recipients (in the sample)
Matched by name only. These donations are matched to this person by name only, so some may belong to a different person with the same name: FEC filings can include a donor's employer and city, but our matching does not check them against what we know about this person.
SEC Filings
Associated Companies
Entities appearing alongside this person in SEC full-text search — an association, not necessarily ownership or control. Follow each link to the primary SEC record to judge for yourself.
Recent Insider Filings
Score Breakdown
The giving score is a weighted average of 2 components. The formula is open and versioned — the weight percentages below show how much each component contributes to the final score.
Evidenced charitable giving — built on what they actually give each year, not parked assets. Dominated by generosity (annual giving relative to net worth — the share of your fortune you give), plus the absolute scale of that giving, plus a small nudge for signing the Giving Pledge (a commitment, not a realized action).
Data: ProPublica 990 charitable disbursements, net worth, The Giving Pledge registry
How much sourced public record we hold about this person — net worth, SEC filings, foundation 990s, news coverage, Wikidata. It measures our coverage, not how open the person is. Each further kind of record scores higher, up to eight. Political donation records matched to a person by name alone are not counted: they may belong to someone else with the same name. From October 7, 2026, our own AI-written summary and the profile photo are not counted either — neither is a public record — so grades that leaned on them moved down that day.
Data: SEC EDGAR, ProPublica 990s, GDELT / NewsAPI, Wikidata
Formula (v2): Giving score = 65% x Philanthropy + 35% x Data coverage
Scored on 10/16/2026 on a 0–100 scale. The score uses only the signals we have populated data for. Goal Impact, Controversy, and Community Approval are deferred until that data exists — Phase 1 goal adoption, controversy detection, and community votes respectively.
All data is sourced from public records. Each section links to its original source.