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Thomas Peterffy
Status
Born in 1944 (age –). Living in Florida.
Criminal status: No personal convictions; Interactive Brokers has settled dozens of regulatory enforcement actions across the SEC, CFTC, FINRA, Nasdaq, OFAC, and New Jersey's Bureau of Securities, including a $55M SEC/CFTC recordkeeping settlement and an $11.8M OFAC sanctions settlement
Summary
Thomas Peterffy is the founder and chairman of Interactive Brokers, a discount brokerage he built after arriving in the United States from Hungary in 1965. He pioneered electronic options trading in the 1970s and 1980s, creating automated market-making systems that transformed the industry and grew Interactive Brokers into one of the world's largest online brokerages serving retail and institutional clients worldwide.
Peterffy stepped down as CEO in 2019 while remaining chairman of the board. His net worth has grown to an estimated $101B in 2026 as Interactive Brokers stock has surged, making him one of the world's twenty richest people.
His tenure has been marked by a sustained pattern of regulatory compliance failures spanning six different regulators dating back to a $100,000 New Jersey supervision settlement in 2019: an $38M anti-money-laundering settlement with the SEC, FINRA, and CFTC in 2020, a $55M off-channel communications settlement with the SEC and CFTC in 2023, an $11.8M OFAC sanctions settlement in 2025 covering 12,367 violations across sanctioned countries, and a string of further FINRA and Nasdaq enforcement actions running into December 2025.
He is also a major Republican political donor who has channeled $13M+ to Republican super PACs across multiple election cycles, funding candidates and organizations that consistently oppose the financial regulation Interactive Brokers has repeatedly violated.
Business Relationships
Ken Griffin and Peterffy are two of the most prominent figures in electronic market-making and options trading, operating competing automated trading systems that both helped define the modern brokerage industry. Jeff Yass of Susquehanna International Group emerged from the same Philadelphia options trading ecosystem in the same era — and shares a comparable pattern of large-scale Republican political donations aimed at limiting financial regulation.
Ownership
Peterffy and his affiliates own approximately 91.6% of IBG Holdings LLC, which in turn holds roughly 73.7% of the combined voting power of Interactive Brokers Group through its Class B common stock. This layered structure gives Peterffy effective control over the company's stockholder votes despite holding no direct long-term incentive compensation, which the board attributes to his ownership stake already aligning his interests with shareholders. He serves as chairman of the board following his operational step-down as CEO in 2019.
Family & Heirs
Peterffy's three children — Alexandra, Catherine, and William — serve as trustees of the Peterffy Foundation, an environmental and indigenous-causes grantmaker. Thomas funded the foundation with a $78 million contribution in 2020, growing its endowment to roughly $178 million by 2024 through investment gains, but does not serve on its board. A separate foundation under Thomas's own control, Balance for Freedom, made no grants in five of the last six years. His children's grantmaking focuses on indigenous sovereignty, climate protection, and environmental justice — areas directly at odds with their father's personal political giving.
Evidence
2021-01-01 - 😇 - Peterffy Foundation grants $1.38M to Land is Life and $700K to Bioneers for indigenous Amazon and environmental programs
2021-01-28 - 😈 - Interactive Brokers blocked retail stock purchases during GameStop surge while allowing sales, cutting off millions of retail traders
2023-09-29 - 😈 - SEC and CFTC fined Interactive Brokers $55M combined for 4+ years of widespread WhatsApp and personal text use for business communications
2023-12-11 - 😈 - Peterffy donated $2M to Glenn Youngkin super PAC as part of pattern of Republican political mega-donations totaling $13M+ across 2020-2023
2024-10-24 - 😈 - FINRA fined Interactive Brokers $475K for securities-lending program failures that caused over 800 improper share-return transactions in 2021
2025-01-03 - 😈 - FINRA fined Interactive Brokers $2.25M for allowing 4.2 million free-riding violations across more than 7 years
2025-05-01 - 😈 - FINRA fined Interactive Brokers $400K for failing to accurately report at least 300 customer complaints and 91 regulatory actions over a decade
2025-07-15 - 😈 - Interactive Brokers settled with OFAC for $11.8M for 12,367 sanctions violations including transactions with Iran, Cuba, Syria, and Russia
2025-08-22 - 😈 - FINRA fined Interactive Brokers $650K for failing to properly vet customers for options trading over a 5-year period
2025-09-17 - 😈 - Interactive Brokers agreed to pay $1.825M to settle a wage-and-hour lawsuit for misclassifying customer support employees as exempt from overtime pay
2025-09-30 - 😈 - FINRA fined Interactive Brokers $125K for failing to disclose municipal bond market discounts to 130 customers across 1,918 transactions
Analysis
Peterffy's record reflects a sustained pattern of regulatory non-compliance at Interactive Brokers spanning six different regulators and more than a decade. It began with a $100,000 failure-to-supervise settlement with New Jersey's Bureau of Securities in February 2019, after the firm failed to run a basic background check that would have caught a three-time convicted financial felon opening 16 linked accounts to defraud investors.
The $38M anti-money-laundering settlement in August 2020 found the firm failed to file at least 150 Suspicious Activity Reports tied to potential microcap securities manipulation and treated hundreds of millions of dollars in wire transfers as first-party transfers despite missing remitter information. The $55M SEC/CFTC settlement in September 2023 covered years of employees — including senior staff — using WhatsApp and personal texts for business communications in defiance of internal policy, with the violations so widespread that the firm "generally would not have been able to provide" required records to regulators on request.
Beyond these headline cases, Interactive Brokers accumulated a dense run of further enforcement actions: a $1.75M penalty and $82.57M customer restitution for failing to prepare its trading system for the negative crude oil prices of April 2020, a $1.01M CFTC penalty for supervision failures that let the firm overcharge customers on exchange fees from 2015 to 2021, a $475K FINRA fine for securities-lending miscalculations, a $2.25M free-riding fine covering 4.2 million violations because the firm's surveillance system excluded options trading entirely, a $400K reporting-failures fine, an $11.8M OFAC sanctions settlement, a $650K options-approval fine, a $125K municipal-bonds disclosure fine, a $150K market-data fine for failing to give customers complete price information for over four years, and a $900K Nasdaq fine for a supervisory system that failed to catch potentially manipulative trading through foreign omnibus accounts — a run of penalties spanning six different regulators across seven consecutive years.
The firm also settled a wage-and-hour lawsuit for $1.825M after customer-support employees alleged they were misclassified as exempt from overtime pay and routinely worked 43-50 hour weeks without proper compensation. The GameStop trading restriction in January 2021 — where Peterffy blocked retail purchasing during a market surge while allowing selling — adds a direct harm dimension: millions of retail traders lost access to the brokerage's core service at a critical moment.
Peterffy's sustained pattern of Republican political mega-donations reinforces a profile of someone who uses financial power to resist the regulatory oversight his firm's record suggests is warranted. In April 2026, Peterffy publicly argued for eliminating insider-trading enforcement entirely, telling Bloomberg's Odd Lots podcast that market information "eventually always filters out" and that trying to stop insider trading is futile.
Two more recent developments complicate this pattern in different directions. Interactive Brokers voluntarily self-disclosed its OFAC sanctions violations and cooperated substantially with a multi-year investigation, reducing its exposure from a potential $5B liability to $11.8M — the same underlying episode that also produced one of the firm's largest recent fines. Separately, in July 2025 the firm launched IBKR InvestMentor, a free mobile app offering financial-education content to beginner investors, extending the firm's earlier record of endowing academic finance research.
Questions
Should the pattern of regulatory violations at Interactive Brokers — now spanning six different regulators across more than a decade — be attributed to Thomas Peterffy personally? He served as CEO until 2019 and remains chairman with effective majority control through IBG Holdings. Does stepping down operationally shift culpability to management, or does majority ownership and board control mean the buck still stops with him?
Thomas Peterffy funded the Peterffy Foundation with $78M but transferred governance entirely to his children, who fund environmental and indigenous causes, while his own separately controlled foundation, Balance for Freedom, made no grants in five of the last six years. Should the Peterffy Foundation's philanthropic credit accrue to Thomas personally, given that he exerts no governance authority over its grants?
Interactive Brokers voluntarily self-disclosed its OFAC violations and cooperated with regulators, substantially reducing its penalty. Should proactive disclosure that follows years of the underlying violations occurring meaningfully offset a company's overall compliance record, or does it only mitigate the specific episode disclosed?
The GameStop trading restriction remains genuinely contested: did Interactive Brokers have a legitimate obligation to manage clearing risk during unprecedented market conditions, or did the restriction benefit short sellers at retail investors' expense? How should the project weigh actions that regulators declined to charge but critics consider market manipulation?
Redemption Arc
The Peterffy Foundation's expanding environmental and indigenous grantmaking — including $1.38M to Land is Life in 2021 and over $7M to 75+ organizations in 2023 — represents a positive trajectory, though this giving is governed by his children rather than by Thomas himself. Interactive Brokers' July 2025 launch of a free financial-education app and its voluntary self-disclosure of that same year's OFAC violations are further positive signals. His own political donations, however, have continued to fund candidates and organizations that oppose the financial regulation his firm's compliance record suggests is necessary, and the company's overall regulatory trajectory shows no meaningful improvement: new settlements arrived in every year from 2019 through 2025, spanning six different regulators and widening rather than narrowing in scope.