Trading & Options · Profile from Trading and Options Research Companion
Interactive Brokers
The broker that began as an options market maker. Thomas Peterffy, a Hungarian-born programmer, bought an American Stock Exchange seat in 1977 and priced options with computer models when the trading floor still ran on intuition; his firm, Timber Hill (formed 1982), carried model-generated price sheets and then handheld computers onto the floor (reported, verify date) and became one of the first electronic options market makers on the new screen exchanges of Europe. In 1993 he turned the same technology outward as Interactive Brokers, a direct-access broker for professional traders; the group listed in a Dutch-auction IPO at $30.01 on 3 May 2007, quit options market making in 2017, and became the low-cost, automated broker of choice for active options, futures and international traders. For this knowledge base IBKR matters for three things: it is the clearest case of a trading edge (model pricing and automation) turned into a brokerage edge; its real-time, automatic liquidation margin is the industry's purest survival system for customers' leverage; and its two gap losses — the Swiss franc floor removal (15 Jan 2015; ~$121m Q1 charge) and negative WTI (20 Apr 2020; an aggregate loss of ~$104m, mostly $103m paid to compensate affected customers — Q2 2020 earnings release) — show what happens to a broker when prices jump past where its software assumed they could go. The business as a whole (interest income, accounts, S&P 500 entry) is told in Finance: Interactive Brokers; this profile takes the trading angle and keeps every shared figure equal.
At a glance
- Founded
- 1977–78 (Peterffy's AMEX options seat and trading business, reported); Timber Hill formed 1982; Interactive Brokers brokerage launched 1993 (Finance KB)
- Headquarters
- Greenwich, Connecticut; large operations in Chicago, Hong Kong, Budapest, Zug, Mumbai and elsewhere (Finance KB)
- Ownership / structure
- Interactive Brokers Group, Inc. (Nasdaq: IBKR) since the 3 May 2007 IPO; an Up-C holding company owning part of IBG LLC; Peterffy and employees own most of IBG LLC through IBG Holdings LLC (Finance KB)
- Leadership (2026)
- Thomas Peterffy, founder and chairman (CEO until Oct 2019); Milan Galik, CEO since Oct 2019; Paul Brody, CFO (Finance KB)
- Type
- Global electronic broker-dealer and futures commission merchant (stocks, options, futures, FX, bonds, funds, crypto, forecast contracts); owner of ForecastEx, a CFTC-registered exchange and clearing house for event contracts; formerly an options and equity market maker (Timber Hill, to 2017)
- Scale (dated)
- Q2 2020: 876,000 accounts; 1.75m daily average revenue trades (DARTs); 151.7m options contracts in the quarter (140.8m customer, 10.9m principal) (8-K, 21 Jul 2020). Q3 2026: ~5.58m accounts; customer equity ~$964.7bn; margin loans ~$105.2bn; customer credit balances ~$186.2bn (company, 15 Oct 2026, via Finance KB)
- Revenue and profit
- 2025 net revenues just over $6bn (~$6.2bn reported), commissions ~$2.1bn, net interest income ~$3.6bn, pre-tax margin ~77% (company, Jan 2026, via Finance KB). Q2 2020: net revenues $539m, income before tax $222m (8-K)
- Regulators
- SEC and FINRA (broker-dealer); CFTC and NFA (FCM; ForecastEx as a designated contract market and derivatives clearing organisation); OCC and CME clearing memberships; FCA, Central Bank of Ireland, SFC Hong Kong, MAS and others abroad (verify entity list)
- Signature moves (incl. failures)
- AMEX seat and model-priced options market making (1977–83); Interactive Brokers launch (1993); Dutch-auction IPO (2007); Swiss franc gap loss and margin overhaul (2015); exit from options market making (2017); IBKR Lite and PFOF for one tier (2019); AML penalties (2020); negative-oil customer compensation (2020); GameStop options restrictions (2021); ForecastEx event contracts (2024)
9 strategic moves analysed
Each one gets a full strategy file in the companion: context, the decision, the financing, what happened, and the lesson.
1977
AMEX Seat and Model Priced Options Market Making
Founding / technology bet
1993
Interactive Brokers Launch Direct Access
New product / strategy pivot
2007
Dutch Auction IPO of a Market Maker and Broker
IPO
2015
Swiss Franc Gap and Margin Overhaul
Loss and risk-limit response (failure)
2017
Exit from Options Market Making
Closing a strategy
2020
AML Penalties and Microcap Surveillance
Regulatory and enforcement action
2020
Negative Oil and Customer Compensation
Loss / control failure, then customer compensation
2021
GameStop Options Restrictions and Margin
Risk-limit change / controversy
2024
ForecastEx Event Contracts
New exchange and product