Net worth
$104.1B
Forbes Real-Time · as of Sep 24, 2026
Latest moves
No moves from Thomas Peterffy in the digest yet. The archive grows every morning.
Recent SEC filings
No SEC filings in the last 90 days.
Form 4 insider trades post within 2 business days. 13F fund holdings can arrive 45 days after quarter end. New to filings? Read Filings 101.
Footprint
Companies
Interactive Brokers GroupIBKR · Nasdaq · Founder and Chairman · Peterffy and affiliates own… · as of Feb 2026 · $89.82 ▼ 1.90%
source ↗More
- Ticker
- IBKR
- Exchange
- Nasdaq
- Role
- Founder and Chairman (CEO until Dec 2019; Milan Galik CEO since)
- Stake
- Peterffy and affiliates own ~91.6% of IBG Holdings LLC, which owns ~73.7% of IBG LLC and holds ~73.7% of votes via Class B stock
- Stake as of
- 2026-02-24
IBG Holdings LLCControlling holding company of… · ~91.6% · as of Feb 2026
source ↗More
- Role
- Controlling holding company of Interactive Brokers (sole holder of Class B common)
- Stake
- ~91.6% (Peterffy and affiliates)
- Stake as of
- 2026-02-24
Stakes
Newsmax Inc. Class B common (via Conyers Investments LLC); Peterffy is a director and 10% ownerNMAX · 25.9% · as of Mar 2025 · $10.98 ▲ 0.73%
source ↗More
- Ticker
- NMAX
- Stake
- 25.9% of Class B (23,045,352 shares)
- Stake as of
- 2025-03-31
Investment vehicles
IBG Holdings LLCholding co · CIK 0001399812
source ↗More
- Type
- holding co
- Notes
- Holds IBKR Class B stock / ~73.7% of IBG LLC; historically filed SC 13D/A on IBKR (2007-2022).
Conyers Investments LLC (Connecticut)holding co
source ↗More
- Type
- holding co
- Notes
- Peterffy is manager; holds his Newsmax Class B shares.
Private deals
Became Newsmax director and 10% owner (Form 3) around Newsmax's 2025 public listing; 23.0M Class B shares via Conyers…Mar 2025
source ↗More
- In full
- Became Newsmax director and 10% owner (Form 3) around Newsmax's 2025 public listing; 23.0M Class B shares via Conyers Investments
- Date
- 2025-03-28
Real estate
Palm Beach, FloridaPrimary residence · current
source ↗Florida (mostly)Land holdings of over 560,000 acres · current (Forbes)
source ↗Greenwich, Connecticut80-acre estate (sold) · $21M · 2020 (sale; first listed at $65M in 2015)
source ↗Aspen, ColoradoHome · reported
source ↗Trophies
Media outlet: ~25.9% of Newsmax Class B stock and board seat
source ↗Legal & regulatory
OFAC $11,832,136 settlement with Interactive Brokers LLC over apparent sanctions violations (Iran, Cuba, Syria…
source ↗More
- In full
- OFAC $11,832,136 settlement with Interactive Brokers LLC over apparent sanctions violations (Iran, Cuba, Syria, Crimea, Chinese military companies, Russia); deemed non-egregious and voluntarily self-disclosed
Past IBKR regulatory settlements: 2020 $38M AML settlement (SEC/FINRA/CFTC); 2023 SEC $35M and CFTC $20M recordkeeping…
source ↗More
- In full
- Past IBKR regulatory settlements: 2020 $38M AML settlement (SEC/FINRA/CFTC); 2023 SEC $35M and CFTC $20M recordkeeping penalties; FINRA $2.25M (Dec 2024)
IBKR runs ForecastEx prediction-market exchange (launched Aug 2024; political contracts from Oct 2024)…
source ↗More
- In full
- IBKR runs ForecastEx prediction-market exchange (launched Aug 2024; political contracts from Oct 2024) - CFTC-regulated business line
Dual-class control: Holdings expected to cast ~73.7% of votes at the 2026 annual meeting
source ↗Research gaps: Session WebSearch budget exhausted; profile built from SEC EDGAR, OFAC, Forbes and Wikipedia. Not verified: Peterffy's Palm Beach purchase prices/dates (2021-2025 reports), Florida land entities, any private foundation/EIN, aircraft, current Newsmax stake after March 2025, 2025-2026 IBKR regulatory matters beyond OFAC. Peterffy Form 4 (Feb 2025) could not be retrieved (EDGAR 503). Political donations intentionally excluded.
Prices via Finnhub · as of Sep 24, 2026 4:00 PM ET. For information only.
What to watch
Interactive Brokers Q3 2026 earnings (typically mid/late October) and monthly brokerage metrics
source ↗Any IBG Holdings exchanges of IBG LLC interests into Class A stock (reduces Peterffy's economic stake)
source ↗Newsmax (NMAX) insider filings by Peterffy/Conyers
source ↗IBKR stablecoin funding (USDC from Jan 2026) and crypto/prediction market expansion
source ↗