
What happened
Interactive Brokers Group, Inc. (Nasdaq: IBKR) reported third-quarter 2026 results on October 15. GAAP diluted EPS was $0.69 and adjusted EPS was $0.67. GAAP net revenues were $1.91 billion and adjusted net revenues were $1.87 billion. Income before income taxes was $1.50 billion, or $1.45 billion adjusted.
A year earlier, diluted EPS was $0.59 and adjusted EPS was $0.57. Net revenues were $1.66 billion and adjusted net revenues were $1.61 billion. Income before income taxes was $1.31 billion, or $1.27 billion adjusted.
Commission revenue rose 12% to $602 million. That came on 18% higher DARTs and higher regulatory fees. Other fees and services rose 33% to $88 million. Execution, clearing and distribution fees rose 46% to $134 million. The board raised the quarterly cash dividend 71.4% from $0.0875 to $0.15 per share.
Key numbers
| Metric | Latest | Change | Source |
|---|---|---|---|
| GAAP diluted EPS | $0.69 | from $0.59, +$0.10 | SEC 8-K press release |
| GAAP net revenues | $1.91 billion | from $1.66 billion, +15.7% | SEC 8-K press release |
| Commission revenue | $602 million | from $537 million, +12% | SEC 8-K press release |
| Customer accounts | 5.58 million | from 4.13 million, +35% | SEC 8-K press release |
| Net interest income | $1.15 billion | from $967 million, +19% | SEC 8-K press release |
Read more: Interactive Brokers Group (IBKR) stock analysis and investment case
Why it matters
OptimistFi's case is that IBKR is still adding customers and activity at scale. Customer accounts increased 35% to 5.58 million. Total DARTs increased 18% to 4.27 million. Customer equity rose 27% to $964.7 billion. Customer margin loans increased 36% to $105.2 billion. Customer credits increased 20% to $186.2 billion.
Net interest income increased 19% to $1.15 billion, mainly on higher average customer margin loans and customer credit balances. Customer trading volume in futures increased 13%, while stocks and options volumes decreased 24% and 1%. Total equity was $23.3 billion. Receivables from customers, net of allowance for credit losses, rose to $105.59 billion from $90.47 billion.
The filing says pretax margin slipped to 78% from 79%, and net interest margin fell to 1.99% from 2.16%. Cleared customers' commission per cleared commissionable order also fell 4% to $2.59.
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What's next
Interactive Brokers will hold a conference call today, October 15, 2026, at 4:30 p.m. ET to discuss the quarter. The higher dividend is payable on December 14, 2026, to shareholders of record as of December 1, 2026.
The call will be the next check on account growth, trading activity and net interest margin.
Stronger account growth and DARTs would support the case, while more margin pressure would weaken it.
More from OptimistFi
- IBKR stock: the Interactive Brokers Group thesis, its status and the next test to watch
- Stock research on every company OptimistFi covers
- Latest stock research and investment-case updates
- OptimistFi: evidence-first equity research
Sources
- SEC 8-K press release — Exhibit 99.1, results for the quarter ended September 30, 2026
- Form 8-K — Current report dated October 15, 2026
Read the full OptimistFi thesis on Interactive Brokers Group, Inc.: https://optimistfi.com/stocks/IBKR
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Originally published on OptimistFi, evidence-first equity research. More at optimistfi.com.
