One name, Interactive Brokers Group Inc (IBKR), is 12.75% of what Rob Vinall's RV Capital reports for 2026 Q2, according to the 13F-HR filed with the SEC on August 14, 2026. The stake is 561K shares worth about $48.8M, the 4th largest of 13 stock positions. Rob Vinall trimmed the share count by 26% in 2026 Q2.
What did the 2026 Q2 filing report for IBKR?
As of June 30, 2026, from the 13F-HR filed August 14, 2026.
| Value | |
|---|---|
| Portfolio weight | 12.75% |
| Shares | 561K |
| Reported value | $48.8M |
| Rank in portfolio | 4th of 13 |
| Largest holding | CVNA at 30.31% |
| Top three holdings | 68.77% of the book |
| Change this quarter | -26% shares |
How concentrated is Rob Vinall in IBKR?
IBKR at 12.75% is 1.7 times the average stock position in the Rob Vinall portfolio, which is 8%. The largest holding is CVNA at 30.31%. The three largest stocks together are 68.77% of the reported book. A quarter earlier IBKR was 13.36% of the book.
Where does IBKR sit in the Rob Vinall portfolio?
IBKR ranks 4th of 13 stock positions in the Rob Vinall portfolio at 12.75%, above the fund's average stock position of 8%. The IBKR cut was the 2nd largest of the quarter's 7 position changes by percent change to portfolio. Across the 2026 Q2 portfolio, Rob Vinall reported 13 stock positions, with no position opened or closed. The total portfolio value is about $382.9M, little changed from the prior quarter.
How long has Rob Vinall held IBKR?
Rob Vinall first reported IBKR in the quarter ended March 31, 2023. The weight peaked at 13.36% in 2026 Q1. The share count was unchanged the quarter before. Every reported trade is on the Rob Vinall IBKR trade history page.
Did other funds buy or sell IBKR in 2026 Q2?
Among the other tracked funds that had filed for 2026 Q2 as of August 14, 2026, 6 hold IBKR. Of those, one opened it this quarter. The largest buyers of IBKR this quarter were Ole Andreas Halvorsen and Stephen Mandel. The largest sellers were William Von Mueffling and John Armitage. Every tracked holder of IBKR is on the IBKR ownership page.
FAQ
What share of the Rob Vinall portfolio is IBKR?
IBKR is 12.75% of the Rob Vinall portfolio as of 2026 Q2, the 4th largest of 13 stock positions.
What is the IBKR stake of Rob Vinall worth?
Rob Vinall holds 561K shares of IBKR, worth about $48.8M at June 30, 2026 prices, 12.75% of the reported portfolio.
What are the largest holdings of Rob Vinall?
The largest stock positions of Rob Vinall as of 2026 Q2 are CVNA (30.31%), META (20.45%) and CACC (18.01%), together 68.77% of the book.
Did Rob Vinall's RV Capital change its IBKR position in 2026 Q2?
Rob Vinall trimmed the share count by 26% in 2026 Q2.