Q2 FY26 · Ended Jun 30, 2026 · View SEC filing
Customer balances, not trades, earn most of the revenue
Net interest income rose 22.9% even as its margin narrowed: customers held and borrowed more, so balances, not rates, carried the growth.
For investorsWhat keeps net interest income growing if rates fall further?
For foundersGrowing revenue faster than headcount: the automation playbook
Commissions rose 30.4% on more trades at a steady price, so growth rests on how actively customers trade.
Revenue grew 28.1% while staff pay grew 11.7%, so most of each new revenue dollar reached pretax profit.
Founder-controlled Holdings owns most of the operating company, so 76.7% of net income goes to it, not to listed shares.
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Business Lens describes Interactive Brokers from its own filings with the SEC. It is not a view on its shares, a target, or advice to buy, sell or hold anything; figures are as filed and may be restated by the company later. The filing is linked above.
