Interactive Brokers Group Inc (IBKR)
Financial Services
Capital Markets
88.00 $
-2.8%
vs. previous close
Closing price · As of: 31. Jul 2026
Who owns Interactive Brokers Group Inc (IBKR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 97.6% of the shares are freely tradable; institutional investors hold 89.9%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
89.9%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
2.7%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
97.6%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
2.4%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
446Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.04 | 31,375,037 | -1.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.33 | 28,180,361 | +0.0 | 03/31/2026 |
| State Street Corp | 4.29 | 19,092,105 | +1.4 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 3.36 | 14,984,545 | +0.0 | 03/31/2026 |
| FMR Inc | 2.81 | 12,501,284 | +159.9 | 03/31/2026 |
| Cantillon Capital Management LLC | 2.52 | 11,245,881 | -11.9 | 03/31/2026 |
| Geode Capital Management, LLC | 2.34 | 10,443,607 | +2.4 | 03/31/2026 |
| Kayne Anderson Rudnick Investment Management LLC | 2.25 | 10,016,215 | -10.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Morn Total Stk Mkt Idx Investor | 3.02 | 13,436,862 | -0.2 | 06/30/2026 |
| Vanguard 500 Index Investor | 2.60 | 11,572,519 | -0.8 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.