Interactive Brokers September 2025: Client Equity, DARTs Soar

Interactive Brokers has released its key operating metrics for September 2025, showcasing significant growth across trading activity, client accounts, and overall financial performance.

The brokerage recorded 3.864 million Daily Average Revenue Trades (DARTs) for September, representing a 47% increase compared to September 2024 and an 11% rise from August 2025. This surge underscores the continued strength in client engagement and market activity.

Interactive Brokers September 2025: Client Equity, DARTs Soar

Ending client equity reached $757.5 billion, up 40% year-over-year and 6% month-over-month. Client margin loan balances rose to $77.3 billion, reflecting a 39% increase from the previous year and an 8% gain from the prior month. Additionally, client credit balances totaled $154.8 billion, including $6.2 billion in insured bank deposit sweeps, marking a 33% increase compared to September 2024 and a 6% rise from August 2025.

Interactive Brokers’ client base continued to expand, ending the month with 4.127 million accounts, 32% higher than the prior year and 2% higher than the previous month. Real account growth in September amounted to 111.9 thousand accounts, offset slightly by the withdrawal of one introducing broker with 38.8 thousand accounts and $413.5 million in customer assets from a Futu subsidiary. The firm expects an additional 2.9 thousand account closures to finalize this process.

Financially, Interactive Brokers reported and adjusted diluted earnings per share of $0.51 for the second quarter of 2025. Both reported and adjusted net revenues were $1,480 million, while income before income taxes reached $1,104 million. Commission revenue grew 27% to $516 million, driven by higher customer trading volumes. Specifically, trading volumes increased 31% in stocks, 24% in options, and 18% in futures.

Overall, the September metrics reflect a robust trajectory for Interactive Brokers, emphasizing both growth in trading activity and client assets. The brokerage’s performance continues to highlight its strong position in the competitive online trading and brokerage landscape.

Company Overview

Interactive Brokers caters to diverse requirements, offering competitive fees alongside a wide array of trading options such as stocks, ETFs, options, futures, and other global assets. It distinguishes itself as a top-tier brokerage, particularly appealing to traders and investors seeking a straightforward trading experience. With Interactive Brokers’ user-friendly platform, users can execute trades seamlessly, benefiting from competitive spreads that enhance cost-effectiveness. 

Discover more in our Complete Review.