GAAP Diluted EPS of $0.59, Adjusted¹ EPS of $0.57

GAAP Net Revenues of $1,655 Million, Adjusted Net Revenues of $1,610 Million

Interactive Brokers Group, Inc. (Nasdaq: IBKR), an automated global electronic broker, announced results for the quarter ended September 30, 2025.

Reported diluted earnings per share were $0.59 for the current quarter and $0.57 as adjusted. For the year-ago quarter, reported diluted earnings per share² were $0.42 and $0.40 as adjusted.

Reported net revenues were $1,655 million for the current quarter and $1,610 million as adjusted. For the year-ago quarter, reported net revenues were $1,365 million and $1,327 million as adjusted.

Reported income before income taxes was $1,312 million for the current quarter and $1,267 million as adjusted. For the year-ago quarter, reported income before income taxes was $909 million and $871 million as adjusted.

Financial Highlights

(All comparisons are to the year-ago quarter.)

• Commission revenue increased 23% to $537 million on higher customer trading volumes. Customer trading volume in stocks and options increased 67% and 27%, respectively, while futures decreased 7%.

• Net interest income increased 21% to $967 million on stronger securities lending activity and higher average customer margin loans and customer credit balances.

• Other fees and services decreased 8% to $66 million, led by a decrease of $12 million in risk exposure fees, which was partially offset by a $3 million increase in FDIC sweep fees.

• Execution, clearing and distribution fees decreased 21% to $92 million, driven by lower regulatory fees, as the SEC Section 31 transaction fee rate was reduced to zero on May 14, 2025, and greater capture of liquidity rebates from certain exchanges due to higher trading volumes in stocks and options.

• General and administrative expenses decreased 59% to $62 million, driven primarily by the non-recurrences of $88 million related to legal and regulatory matters and of $12 million related to the consolidation of our European subsidiaries; partially offset by an increase of $10 million in advertising expenses.

• Pretax profit margin for the current quarter was 79% both as reported and as adjusted. For the year-ago quarter, pretax margin was 67% as reported and 66% as adjusted.

• Total equity of $19.5 billion.

The Interactive Brokers Group, Inc. Board of Directors declared a quarterly cash dividend of $0.08 per share. This dividend is payable on December 12, 2025, to shareholders of record as of December 1, 2025.

Business Highlights

(All comparisons are to the year-ago quarter.)

• Customer accounts increased 32% to 4.13 million.
• Customer equity increased 40% to $757.5 billion.
• Total DARTs³ increased 34% to 3.62 million.
• Customer credits increased 33% to $154.8 billion.
• Customer margin loans increased 39% to $77.3 billion.

Other Items

Other income increased 52% to $85 million. This increase is comprised mainly of $42 million related to our investing activities, partially offset by a $21 million lower gain related to our currency diversification.

In connection with our currency diversification strategy, we base our net worth in GLOBALs, a basket of 10 major currencies in which we hold our equity. In this quarter, our currency diversification strategy decreased our comprehensive earnings by $33 million, as the U.S. dollar value of the GLOBAL decreased by approximately 0.25%. The effects of the currency diversification strategy are reported as components of (1) Other Income (gain of $4 million) and (2) Other Comprehensive Income (loss of $37 million).

Conference Call Information:

Interactive Brokers Group, Inc. will hold a conference call with investors today, October 16, 2025, at 4:30 p.m. ET to discuss its quarterly results. Members of the public who would like to listen to the conference call should register at https://register-conf.media-server.com/register/BIac68f27184924c038fe4a9b3e32b300f to obtain the dial-in details. The number should be dialed approximately ten minutes prior to the start of the conference call. The conference call will also be accessible simultaneously, and through replays, as an audio webcast through the Investor Relations section of the Interactive Brokers web site, www.interactivebrokers.com/ir.

About Interactive Brokers Group, Inc.:

Interactive Brokers Group, Inc. (NASDAQ: IBKR) is a member of the S&P 500. Its affiliates provide automated trade execution and custody of securities, commodities, foreign exchange, and forecast contracts around the clock on over 160 markets in numerous countries and currencies from a single unified platform to clients worldwide. We serve individual investors, hedge funds, proprietary trading groups, financial advisors and introducing brokers. Our four decades of focus on technology and automation have enabled us to equip our clients with a uniquely sophisticated platform to manage their investment portfolios. We strive to provide our clients with advantageous execution prices and trading, risk and portfolio management tools, research facilities and investment products, all at low or no cost, positioning them to achieve superior returns on investments. Interactive Brokers has consistently earned recognition as a top broker, garnering multiple awards and accolades from respected industry sources such as Barron's, Investopedia, Stockbrokers.com, and many others.

Cautionary Note Regarding Forward-Looking Statements:

The foregoing information contains certain forward-looking statements that reflect the Company’s current views with respect to certain current and future events and financial performance. These forward-looking statements are and will be, as the case may be, subject to many risks, uncertainties and factors relating to the Company’s operations and business environment which may cause the Company’s actual results to be materially different from any future results, expressed or implied, in these forward-looking statements. Any forward-looking statements in this release are based upon information available to the Company on the date of this release. The Company does not undertake to publicly update or revise its forward-looking statements even if experience or future changes make it clear that any statements expressed or implied therein will not be realized. Additional information on risk factors that could potentially affect the Company’s financial results may be found in the Company’s filings with the Securities and Exchange Commission.

Note: The term “GAAP” in the following explanation refers to generally accepted accounting principles in the United States.

¹ Adjusted net revenues, adjusted income before income taxes, adjusted net income available for common stockholders and adjusted diluted earnings per share (“EPS”) are non-GAAP financial measures.

• We define adjusted net revenues as net revenues adjusted to remove the effect of our currency diversification strategy and our net mark-to-market gains (losses) on investments².
• We define adjusted income before income taxes as income before income taxes adjusted to remove the effect of our currency diversification strategy and our net mark-to-market gains (losses) on investments.
• We define adjusted net income available to common stockholders as net income available for common stockholders adjusted to remove the after-tax effects attributable to IBG, Inc. of our currency diversification strategy and our net mark-to-market gains (losses) on investments.
• We define adjusted diluted EPS as adjusted net income available for common stockholders divided by the diluted weighted average number of shares outstanding for the period.

Management believes these non-GAAP items are important measures of our financial performance because they exclude certain items that may not be indicative of our core operating results and business outlook and may be useful to investors and analysts in evaluating the operating performance of the business and facilitating a meaningful comparison of our results in the current period to those in prior and future periods. Our currency diversification strategy and our mark-to-market on investments are excluded because management does not believe they are indicative of our underlying core business performance. Adjusted net revenues, adjusted income before income taxes, adjusted net income available to common stockholders and adjusted diluted EPS should be considered in addition to, rather than as a substitute for, GAAP net revenues, income before income taxes, net income attributable to common stockholders and diluted EPS.

² Mark-to-market on investments represents the net mark-to-market gains (losses) on investments in equity securities that do not qualify for equity method accounting, which are measured at fair value; on our U.S. government and municipal securities portfolios, which are typically held to maturity; and on certain other investments.

³ The income tax effect is estimated using the statutory income tax rates applicable to the Company.

⁴ Prior period share and per share amounts have been retroactively adjusted to reflect the four-for-one forward stock split, effected in the form of a stock dividend, on June 17, 2025.

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