Business Context and Reporting Period
Company: Interactive Brokers Group, Inc. (IBKR)
Filing Type: Form 10-K (Annual Report)
Reporting Period: Year ended December 31, 2025
Business Overview: IBKR is an automated global broker providing execution, clearing, and settlement services for stocks, options, futures, forex, bonds, and cryptocurrencies across 170+ exchanges in 40 countries. The company operates as a holding company owning approximately 26.3% of IBG LLC, with the remaining 73.7% held by IBG Holdings LLC (controlled by founder Thomas Peterffy).
Key Milestones: In August 2025, the company joined the S&P 500 Index. A four-for-one stock split was executed in June 2025.
Key Financial Metrics
| Metric | 2025 | 2024 | Change |
|---|---|---|---|
| Total Net Revenues | $6,205 million | $5,185 million | +20% |
| Net Interest Income | $3,563 million | $3,148 million | +13% |
| Commission Revenue | $2,149 million | $1,697 million | +27% |
| Income Before Taxes | $4,771 million | $3,695 million | +29% |
| Net Income (GAAP) | $4,357 million | $3,407 million | +28% |
| Net Income Available to Common Stockholders | $984 million | $755 million | +30% |
| Diluted EPS | $2.22 | $1.73 | +28% |
| Pretax Profit Margin | 77% | 71% | +6 pts |
| Customer Equity | $779.9 billion | $568.2 billion | +37% |
| Total Assets | $203.2 billion | $150.1 billion | +35% |
| Excess Regulatory Capital | $14.1 billion | N/A | N/A |
Material Changes vs. Prior Period
- Revenue Growth: Driven by a 38% increase in customer stock volumes, 26% in options, and 12% in futures. Net interest income rose due to higher average margin loan balances ($69.9 billion vs. $53.5 billion) and credit balances, despite a decline in the average federal funds rate to 4.21%.
- Expense Management: Total non-interest expenses decreased 4% to $1.434 billion. This was primarily due to a $67 million reduction in general and administrative expenses (excluding a prior-year legal settlement) and lower execution fees due to increased liquidity rebates and the elimination of SEC fees in May 2025.
- Customer Base: Total accounts grew 32% to 4.4 million. Daily Average Revenue Trades (DARTs) increased 40% to 3.7 million.
- Dividend Increase: The quarterly dividend was increased to $0.08 per share in April 2025, up from $0.0625 in 2024.
Guidance, Outlook, and Risks
Management Commentary: Management attributes strong performance to record trading volumes, higher volatility (VIX average of 18.9 vs. 15.6 in 2024), and the expansion of the customer base. The company continues to focus on automation to maintain low costs and high efficiency.
Outlook: The company expects capital expenditures to remain focused on technology infrastructure and cybersecurity. It anticipates continued growth in trading volumes but notes sensitivity to interest rate fluctuations and geopolitical uncertainties.
Risks and Contingencies:
- Regulatory: The company faces ongoing regulatory scrutiny. In July 2025, IB LLC settled a sanctions compliance matter with OFAC, paying a penalty of $11.8 million. A class action settlement regarding liquidation practices was reached in principle in August 2025, with a fairness hearing scheduled for June 2026.
- Market Risk: Revenues are sensitive to trading volumes and interest rates. A 0.25% decrease in U.S. interest rates would decrease net interest income by approximately $77 million annually.
- Technology & Cybersecurity: Reliance on proprietary technology creates operational risk. The company faces evolving cybersecurity threats and data privacy regulations globally.
- Cryptocurrency: The company relies on third-party service providers for crypto custody and execution, exposing it to risks associated with those providers' security and solvency.
Key Facts for Investor Verification
- Ownership Structure: Verify the impact of the 26.3% ownership stake in IBG LLC on net income attributable to common stockholders versus the 73.7% noncontrolling interest held by Holdings.
- Interest Rate Sensitivity: Confirm the company's exposure to falling interest rates, which reduced the net interest margin to 2.08% from 2.35% in the prior year.
- Regulatory Capital: Note the $14.1 billion in excess regulatory capital across all subsidiaries, indicating strong liquidity and compliance buffers.
- Legal Settlements: Monitor the finalization of the class action settlement regarding liquidation practices and any future regulatory fines related to sanctions compliance.
- Stock Split Impact: Ensure all per-share metrics are adjusted for the four-for-one stock split executed in June 2025.