Interactive Brokers 10-Qquarter ended 2026-03-31

Executive Summary

Interactive Brokers delivered 17% Q1 revenue growth and a wider pretax margin as more customers, trading and margin lending outweighed lower interest rates. Automation helped keep non-interest expense growth well below revenue growth, while the larger customer balance sheet increased exposure to abrupt market moves. Regulatory capital provides a substantial buffer, but most reported cash is segregated for customers rather than available for corporate use. For investors, the question is whether account and balance growth can continue to offset pressure on net interest margin without increasing credit losses.

Key Financial Highlights

• Revenue mix: Net interest income and commissions supplied most revenue; net interest margin nevertheless narrowed to 1.88% from 2.10%. Average margin loans rose to $89.2B from $64.4B, explaining how interest income grew despite lower yields.
• Operating leverage: Non-interest expenses rose just 2% to $381M, or 23% of revenue vs 26% a year earlier. Lower regulatory fees and greater liquidity-rebate capture reduced execution, clearing and distribution costs.
• Cash conversion: OCF was $3.61B vs total net income of $1.17B; FCF was $3.59B after $26M of capital expenditures. Customer payables added $8.62B to operating cash flow, while additional regulatory-segregated securities used $15.4B; broker-related balance movements therefore heavily influence cash conversion.
• Liquidity and capital: Cash, cash equivalents and restricted cash totaled $58.5B, including $53.4B of regulatory-segregated cash. Aggregate excess regulatory capital was $13.9B, a more useful measure of the operating subsidiaries’ capital buffer than headline cash.
• Market effects: An Up Fintech investment loss of $16M replaced an $11M gain a year earlier. The GLOBAL currency strategy reduced comprehensive earnings by $53M, including a $79M loss in other comprehensive income.

Business Developments

Customer accounts reached 4.75M, up 31% Y/Y, and customer equity rose 38% to $789B. Daily average revenue trades increased 24% to 4.4M; stock, options and futures volumes all rose. Average commission per cleared commissionable order fell 3% to $2.69, so volume—not higher unit pricing—drove commission growth.

Management continues to invest in automated execution, global market access and adjacent services, including securities lending, overnight trading and ForecastEx prediction-market contracts. Expanded securities-borrowing and lending activity added interest income and diversified activity beyond commissions. Planned spending targets technology capacity, cybersecurity and regulatory requirements; strategic stakes and potential acquisitions offer additional avenues for growth, although no material acquisition agreement existed at quarter-end.

Risk Assessment

• Customer margin and liquidation: $86.5B of customer margin loans and indemnities to clearing houses expose IBKR to losses if fast, illiquid market moves defeat automated collateral monitoring and liquidation.
• Interest rates: Based on quarter-end balances, a 25-bp U.S.-dollar rate move would change annualized net interest income by $82M in either direction; falling rates threaten earnings if balance growth cannot compensate.
• Customer-asset liquidity: Segregated balances are substantial but restricted, while $32.0B of securities loaned were overnight or open; customer and collateral movements can quickly reshape cash flows.
• Currency and investment valuations: ≈25% of equity was denominated in non-U.S.-dollar currencies, and GLOBAL is generally not hedged against the dollar, creating swings in earnings and other comprehensive income.
• Model and market stress: Historical risk models and automated market-making controls may understate losses in extreme or illiquid conditions, although current proprietary market-making positions are low.
• Legal and regulatory exposure: A preliminarily approved customer-liquidation settlement calls for up to $5M in payment and ≈$1.8M of debt forgiveness; other litigation, cybersecurity and tax-rule changes could add costs.

This 10-Q lists no risk factors of its own and refers to the annual report. The risks above come from the rest of this filing. Full list: FY2025 10-K.

Strategic Outlook and Investor Actionables

The near-term thesis rests on customer and trading growth sustaining operating leverage while balance growth cushions lower yields. Regulatory capital supports expansion, but the growing margin and securities-lending books make risk performance as important as account growth.

• Customer activity: Track account growth, daily average revenue trades and commission per order; sustained volume growth without sharper unit-price erosion would support commission revenue.
• Interest economics: Track average margin loans, customer credit balances and net interest margin; a continuing margin decline that overwhelms balance growth would weaken the earnings thesis.
• Credit and capital: Track margin-loan growth, credit losses and excess regulatory capital; rising losses or a shrinking capital buffer would signal that expansion is adding disproportionate risk.