Who Owns IBKR?
INTERACTIVE BROKERS GROUP IN — institutional ownership across 7 tracked superinvestors.
Last updated · Full stock page →
7
Institutional Holders
$1.73B
Total Value Held
1000.00T
Total Shares
INTERACTIVE BROKERS GROUP IN (IBKR) is held by 7 tracked superinvestors with a combined position of $1.73B across 1000.00T shares. The largest holder is William Von Mueffling (Cantillon Capital Management) with $754.3M (5.01% of portfolio).
| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|---|---|---|---|---|---|---|
| 1 | William Von Mueffling | Cantillon Capital Management | 11245881 | $754.3M | 5.01% | 2026-03-31 |
| 2 | Andreas Halvorsen | Viking Global Investors | 4830748 | $420.5M | 1.20% | 2026-06-30 |
| 3 | John Armitage | Egerton Capital | 4129416 | $359.4M | 3.47% | 2026-06-30 |
| 4 | Bryan Lawrence | Oakcliff Capital Partners | 1030740 | $89.7M | 33.42% | 2026-06-30 |
| 5 | Stephen Mandel | Lone Pine Capital | 577666 | $50.3M | 0.31% | 2026-06-30 |
| 6 | Robert Vinall | RV Capital GmbH | 561086 | $48.8M | 12.75% | 2026-06-30 |
| 7 | Ray Dalio | Bridgewater Associates | 42076 | $3.7M | 0.02% | 2026-06-30 |
Ownership history
| Period | Holders | Total Value | Total Shares |
|---|---|---|---|
| 2024-03-31 | 2 | $349.2M | 2.82T |
| 2024-06-30 | 3 | $423.8M | 1000.00T |
| 2024-09-30 | 4 | $561.4M | 1000.00T |
| 2024-12-31 | 3 | $419.6M | 1000.00T |
| 2025-03-31 | 5 | $934.6M | 1000.00T |
| 2025-06-30 | 4 | $1.26B | 1000.00T |
| 2025-09-30 | 5 | $1.47B | 1000.00T |
| 2025-12-31 | 5 | $1.41B | 1000.00T |
| 2026-03-31 | 6 | $1.39B | 1000.00T |
| 2026-06-30 | 6 | $972.4M | 1000.00T |