IBKR
Interactive Brokers Gro-cl A
7 of the 83 super-investors we track hold IBKR, worth a combined $1.11B per their latest 13F filings. The largest position: Bryan Lawrence at 33.4% of their portfolio. This quarter the cohort logged 1 buy and 3 sells on the name. Conviction score: 67 of 100 (how strongly the cohort backs it) — ranked #9 of 742 stocks. The stock is up 11.2x since a tracked investor first held it at conviction size (Q1 2017 or earlier). Conviction rising: 1 more super-investor hold it than in 2026Q1.
Held through it: Bryan Lawrence (37q straight), William Von Mueffling (36q straight), Robert Vinall (13q straight) and 1 more. All multibaggers the cohort held →
Why super-investors own IBKR
IBKR is held by 7 super-investors in our cohort, with a combined position value of $1.1B. The highest-conviction owner is Bryan Lawrence at 33.4% of their portfolio. Cohort ownership has grown from 5 to 7 over the last four quarters — net interest is rising. This quarter the cohort registered 1 new positions, 3 trimmed.
AI-synthesized from 13F filings. Not investment advice.
In the news
all news →- Interactive Brokers (IBKR) Stock Looks Above Fair Value Despite Strong Returnssimplywall.st ·
- Robinhood and Interactive Brokers Both Ride Retail Volume. Only One Earns on Idle Cash.The Motley Fool ·
- Interactive Brokers Profits When Trading Is Hot. What Happens When It Cools?Yahoo Finance ·
- Interactive Brokers Group (IBKR) vs. Paysafe Limited (PSFE): Which Fintech Stock has the Stronger Growth Story?Yahoo Finance ·
- IBKR Gains 50.1% So Far in 2026: Should You Buy the Stock Now?The Globe and Mail ·
- Interactive Brokers highlighted as Zacks Bull and La-Z-Boy Bear of the DayTradingView ·
Headlines via Google News. Links open in a new tab.
Cohort owners over time
2016Q3 → 2026Q2How many of the cohort members held this stock each quarter.
Owners (7) · click any column to sort
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | Viking Global Investors | 1.2% | 2q | $420M | 4,830,748 |
| 2 | John Armitage | 3.5% | 10q | $359M | 4,129,416 |
| 3 | Joel Greenblatt | 0.1% | 36q | $94M | 1,081,743 |
| 4 | Bryan Lawrence | 33.4% | 38q | $90M | 1,030,740 |
| 5 | Stephen Mandel | 0.3% | — 1q | $50M | 577,666 |
| 6 | Robert Vinall | 12.8% | 14q | $49M | 561,086 |
| 7 | William Von Mueffling | 6.8% | 37q | $45M | 517,833 |
- 1Viking Global Investorsport1.2%val$420M4,830,748 sh·2q held
- 2John Armitageport3.5%val$359M4,129,416 sh·10q held
- 3Joel Greenblattport0.1%val$94M1,081,743 sh·36q held
- 4Bryan Lawrenceport33.4%val$90M1,030,740 sh·38q held
- 5Stephen Mandelport0.3%val$50M577,666 sh·—1q held
- 6Robert Vinallport12.8%val$49M561,086 sh·14q held
- 7William Von Muefflingport6.8%val$45M517,833 sh·37q held
Owners of IBKR also hold
Congress is trading IBKR
Congress tracker →- Lisa McClainsold$1,001 - $15,000 · 2025-10-14
- Lisa McClainbought$1,001 - $15,000 · 2025-08-13
- Lisa McClainsold$1,001 - $15,000 · 2025-06-24 · late
- Lisa McClainbought$1,001 - $15,000 · 2025-06-17 · late
- Morgan McGarveysold$1,001 - $15,000 · 2024-11-13
- Morgan McGarveybought$1,001 - $15,000 · 2024-06-06
STOCK Act periodic transaction reports; amounts are disclosed ranges. Who files late →
Recent activity (4)
| Manager | Move | % Port. | Δ Shares | Value | Filed |
|---|---|---|---|---|---|
| Robert Vinall | TRIM | 12.8% | -26% | $49M | Aug 14, 2026 |
| Stephen Mandel | NEW | 0.3% | +100% | $50M | Aug 14, 2026 |
| William Von Mueffling | TRIM | 6.8% | -95% | $45M | Jul 29, 2026 |
| John Armitage | TRIM | 3.5% | -34% | $359M | Jul 21, 2026 |
Long US equity 13F-HR filings only. CUSIP 45841N107. Not investment advice.