Interactive Brokers Group, Inc (Class A)
Held by 18 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 45841N107 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns IBKR?
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Who owns IBKR? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
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| # | Manager | Fund | Shares | Value ↑ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 18 | Ken Fisher | Fisher Asset Management | 7.39K | $643.05K | 0.0% | Reduced | -42 | -0.6% | -$3.66K |
| 17 | Mario Gabelli | GAMCO Investors | 16.48K | $1.43M | 0.0% | Reduced | -1.0K | -5.7% | -$87.04K |
| 16 | Bridgeway | Bridgeway Capital Management | 19.60K | $1.71M | 0.0% | Reduced | -7.3K | -27.1% | -$635.39K |
| 15 | Jeremy Grantham | GMO | 21.05K | $1.83M | 0.0% | New | +21.0K | — | +$1.83M |
| 14 | Ray Dalio | Bridgewater Associates | 42.08K | $3.66M | 0.0% | Reduced | -30.3K | -41.8% | -$2.63M |
| 13 | Jim Simons | Renaissance Technologies | 63.90K | $5.56M | 0.0% | Reduced | -397.8K | -86.2% | -$34.62M |
| 12 | George Soros | Soros Fund Management | 151.47K | $13.18M | 0.2% | Reduced | -493.9K | -76.5% | -$42.99M |
| 11 | Mawer | Mawer Investment Management | 223.26K | $19.43M | 0.1% | Reduced | -146.2K | -39.6% | -$12.73M |
| 10 | Stephen Mandel | Lone Pine Capital | 577.67K | $50.28M | 0.3% | New | +577.7K | — | +$50.28M |
| 9 | Israel Englander | Millennium Management | 772.06K | $67.20M | 0.0% | Added | +186.3K | +31.8% | +$16.21M |
| 8 | Steve Cohen | Point72 Asset Management | 867.08K | $75.47M | 0.1% | Added | +805.4K | +1305.5% | +$70.10M |
| 7 | Ken Griffin | Citadel Advisors | 1.08M | $94.15M | 0.1% | Added | +345.5K | +46.9% | +$30.07M |
| 6 | David Shaw | D.E. Shaw & Co. | 1.60M | $139.48M | 0.1% | Added | +1.1M | +226.0% | +$96.70M |
| 5 | John Armitage | Egerton Capital (UK) | 4.13M | $359.42M | 3.5% | Reduced | -2.1M | -34.2% | -$186.77M |
| 4 | Ron Baron | Baron Capital (BAMCO) | 4.81M | $418.42M | 0.6% | Added | +759.8K | +18.8% | +$66.14M |
| 3 | Andreas Halvorsen | Viking Global Investors | 4.83M | $420.47M | 1.2% | Added | +3.4M | +246.5% | +$299.11M |
| 2 | Norges Bank | Norges Bank Investment Management | 6.33M | $551.33M | 0.1% | — | — | — | — |
| 1 | Two Sigma | Two Sigma Investments | 8.34M | $725.95M | 0.5% | Added | +27.4K | +0.3% | +$2.39M |
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No tracked manager sold out of this stock this quarter.
Politician trades
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No politician trades match these filters.