Thomas Peterffy
American businessman
Source: Wikidata — retrieved 10/11/2026 (wikidata)Dispute
Profile Summary
A net worth stated in this summary may be out of date.
Thomas Peterffy is an American businessman in Florida associated with the finance industry. His estimated net worth is ~$17.1B. Wikidata
Business & SEC Activity
SEC records list Peterffy in connection with Interactive Brokers Group (IBKR), Newsmax (NMAX), UP Fintech Holding (TIGR), IBG Holdings LLC, and TradeStation Group Inc. He has 257 insider filings; recent filings include Forms 3 and 4 involving Interactive Brokers. A Form 3 reports an insider's initial ownership, while a Form 4 reports subsequent changes in an insider's holdings. SEC EDGAR
Philanthropy
The Peterffy Foundation, based in Fort Lauderdale, reported $111.0M in assets, $13.8M in revenue, and $8.4M in expenses for tax year 2023. It reported paying $8.1M in grants that year. ProPublica 990
Political Activity
The most recent 100 federal contribution records on file show at least $2.33M in contributions from January 27, 2025 through May 4, 2026; these figures cover only the sampled records, not his full history. The sample includes $1.23M designated Republican and $1.10M with an unknown party designation. Top recipients in the sample were Emmer Majority Builders ($899,200), the NRCC ($487,300), the Republican National Committee ($458,000), V-PAC: Victors, Not Victims ($100,000), and Team Sununu ($50,000). 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.
In the News
A June 2026 article reported that Peterffy, identified as Interactive Brokers' chair, said prediction markets would be the next major development in trading. NewsAPI
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 712 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 $2,332,200.
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. View on Wikidata