Interactive Brokers Group, Inc.

We report non-GAAP financial measures, which exclude certain items that may not be indicative of our core operating results and business outlook and are useful in evaluating the operating performance of our business. See the “Non-GAAP Financial Measures” section below in this Item 7 for additional details.

Diluted earnings per share were $2.22 for the year ended December 31, 2025 (“current year”), compared to $1.73 for the year ended December 31, 2024 (“prior year”). Adjusted diluted earnings per share were $2.19 for the current year, compared to $1.76 for the prior year. The calculation of diluted earnings per share is detailed in Note 4 – “Equity and Earnings Per Share” to the audited consolidated financial statements, in Part II, Item 8 of this Annual Report on Form 10-K.

For the current year, our net revenues were $6,205 million and income before income taxes was $4,771 million, compared to net revenues of $5,185 million and income before income taxes of $3,695 million in the prior year. Adjusted net revenues were $6,156 million and adjusted income before income taxes was $4,722 million, compared to adjusted net revenues of $5,257 million and adjusted income before income taxes of $3,767 million in the prior year.

The financial highlights for the current year were:

•

Net interest income increased 13% from the prior year to $3,563 million, driven by higher average customer margin loans and customer credit balances, and by stronger securities lending activity.

•

Commission revenue increased 27% from the prior year to $2,149 million on higher stocks, options and futures volumes.

•

Other fees and services increased 4% from the prior year to $291 million on higher Insured Bank Deposit Sweep Program fees (“FDIC sweep fees”), market data fees and payments for order flow from exchange-mandated programs, partially offset by lower risk exposure fees.

•

Other income increased $142 million from the prior year to $202 million.

•

Execution, clearing and distribution fees expenses decreased 6% to $420 million, driven by greater capture of liquidity rebates from certain exchanges due to higher trading volumes in stocks and options, and by the elimination of SEC fees beginning in May 2025.

•

Pretax profit margin was 77%, up from 71% in the prior year. Adjusted pretax profit margin was 77%, up from 72% in the prior year.

In connection with our currency diversification strategy as of December 31, 2025, approximately 25% of our equity was denominated in currencies other than the U.S. dollar. In the current year, our currency diversification strategy increased our comprehensive earnings by $387 million (compared to a decrease of $222 million in the prior year), as the U.S. dollar value of the GLOBAL increased by approximately 2.05%, compared to its value as of December 31, 2024. The effects of our currency diversification strategy are reported as (1) a component of “Other Income” (loss of $4 million) in the consolidated statements of comprehensive income and (2) other comprehensive income (“OCI”) (gain of $391 million) in the consolidated statements of financial condition and the consolidated statements of comprehensive income. The full effect of the GLOBAL is captured in comprehensive income.