Interactive Brokers Gro-cl A (IBKR) Held by Superinvestors
INTERACTIVE BROKERS GRO-CL A (IBKR) is currently held by 10 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $1.18B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Viking Global Investors is currently the largest disclosed institutional shareholder of IBKR tracked by InsiderSet, reporting ownership valued at approximately $420.47M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $387.81M, representing an estimated loss of -7.77% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed IBKR value among the investors covered in this analysis. Major shareholders include Viking Global Investors, Egerton Capital UK, Bares Capital Management, and several other long-term asset managers with concentrated positions in INTERACTIVE BROKERS GRO-CL A (IBKR).
This page ranks the largest institutional IBKR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Viking Global Investors | Ole Andreas Halvorsen | 1.20% | 4,830,748 | $420,468,306 | $387,812,449 | -$32,655,857 | -7.77% |
| Egerton Capital UK | John Armitage | 2.75% | 3,160,704 | $269,987,336 | $253,741,317 | -$16,246,019 | -6.02% |
| Bares Capital Management | Brian Bares | 13.08% | 2,060,589 | $141,789,129 | $165,424,085 | +$23,634,956 | +16.67% |
| Ancient Art (Teton Capital) | Quincy Lee | 22.86% | 1,285,193 | $111,863,199 | $103,175,294 | -$8,687,905 | -7.77% |
| Oakcliff Capital Partners | Bryan R. Lawrence | 33.42% | 1,030,740 | $89,715,610 | $82,747,807 | -$6,967,803 | -7.77% |
| Lone Pine Capital | Stephen Mandel | 0.31% | 577,666 | $50,280,049 | $46,375,026 | -$3,905,023 | -7.77% |
| RV Capital | Rob Vinall | 12.75% | 561,086 | $48,836,925 | $45,043,984 | -$3,792,941 | -7.77% |
| Cantillon Capital Management | William Von Mueffling | 6.78% | 517,833 | $45,072,184 | $41,571,633 | -$3,500,551 | -7.77% |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 63,900 | $5,561,856 | $5,129,892 | -$431,964 | -7.77% |
| Sequoia Financial Advisors | 0.01% | 14,304 | $1,245,052 | $1,148,325 | -$96,727 | -7.77% |
Frequently asked questions about IBKR
Who are the largest superinvestors holding IBKR?
The largest superinvestors holding IBKR in the latest SEC Form 13F filings include Viking Global Investors, Egerton Capital UK, Bares Capital Management, Ancient Art (Teton Capital), and Oakcliff Capital Partners. InsiderSet ranks these superinvestors by their latest reported IBKR position.
What does the IBKR superinvestors page include?
This page tracks IBKR positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. INTERACTIVE BROKERS GRO-CL A (IBKR) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold IBKR?
InsiderSet currently tracks 10 superinvestors reporting IBKR holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own IBKR.
How much IBKR stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $1.18B in IBKR holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were IBKR superinvestor holdings last updated?
The latest IBKR superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor IBKR holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its IBKR position after the reporting date.
Are superinvestors buying or selling IBKR?
Buying and selling can be analyzed by comparing IBKR positions across consecutive 13F reporting periods. InsiderSet's IBKR Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View IBKR ownership changes.
How have superinvestor IBKR holdings changed over time?
InsiderSet tracks IBKR holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.