Interactive Brokers Group, Inc. (IBKR) Stock

Interactive Brokers Group, Inc. (IBKR) is a Financials stock trading at $89.84 (as of 2026-08-20), with a market capitalization of $40.28B and a trailing P/E of 8.8. Figures are sourced from first-party U.S. SEC EDGAR filings and market data.

Interactive Brokers Group, Inc. provides automated electronic brokerage services that execute, clear, and settle trades across multiple asset classes, including equities, options, futures, foreign exchange, bonds, mutual funds, ETFs, precious metals, and cryptocurrencies. It also offers custody, prime brokerage, securities and margin lending, and related accounts for institutional and individual customers via electronic trading.

Understand Interactive Brokers Group, Inc.: how it makes money

Interactive Brokers Group operates an automated electronic brokerage that executes, clears, and settles trades across multiple asset classes, and it makes money through commission revenue plus other fees and services tied to customer trading activity.

IBKR’s operating model converts customer trading activity into fee revenue, so changes in trading volume (as shown by Daily Average Revenue Trades) and customer growth (as shown by Net new accounts) tend to drive the revenue engine.

Revenue by segment (latest quarter)
Commissions	$0.6B
Other fees	$0.1B

Business quality (Strong): Fee-based brokerage economics show up directly in Commission revenue and Other fees and services revenue, with trading activity and account growth providing the most direct operating signals to track.

Valuation: At 110× earnings, IBKR trades 229% above the Trading average (34×). Note: one-time items can distort reported P/E.

Bull case

Trading volume is directly linked to fee revenue: Commission revenue is the largest segment shown (0.61B), and Daily Average Revenue Trades provides an operating read-through on how much trading activity is generating commissions.
Customer growth supports the long-run revenue base: Net new accounts of 250000 and Customer accounts of 4750000 suggest IBKR is adding clients, which can support future transaction volumes.

Bear case

Revenue can be sensitive to market activity: Because commissions and related fees are tied to trading activity, periods with weaker trading volumes (pressure on Daily Average Revenue Trades) can reduce fee revenue.
Fee mix and other services contribution can shift: Other fees and services revenue is smaller (0.07B) than commission revenue, so changes in how much customers generate through non-commission services may affect total net revenues.

Valuation — source: SEC EDGAR (first-party)
Price	$89.84
Market Cap	$40.28B
P/E Ratio	8.8
EV / EBITDA	-3.6
Price / Book	1.89
Price / Sales	15.82
DCF Value (model)	$170.65
DCF Upside vs Price	89.9%

Profitability & Growth — source: SEC EDGAR
Revenue (TTM)	$2.44B
Net Margin	178.6%
Revenue Growth (YoY)	18.1%
EPS Growth (YoY)	-69.2%

Valuation vs Sector & Industry
Stock P/E	8.8
Sector P/E (Financials)	15.1
Industry P/E (Trading)	34.6
vs Sector	-41.7%
vs Industry	-74.5%

Smart-Money Activity — SEC Form 4 / 13F / Congressional disclosures
Top Institutional Holder	VANGUARD GROUP INC ($3.36B)
Institutional Holders Tracked	10
Congressional Trades (recent)	6

Company
Sector	Financials
Industry	Trading
CEO	Milan Galik
Employees	3,027
Country	US
IPO Date	2007-05-04

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Data as of 2026-08-20.

Figures sourced from U.S. Securities and Exchange Commission (SEC EDGAR) filings and market data. Not personalized investment advice.