News Summary
PositiveInteractive Brokers delivered strong Q2 2026 results with 28% YoY revenue growth and 35% account growth by September, demonstrating robust business momentum. However, Citi's downgrade to Neutral on valuation concerns (24x 2026 normalized EPS) reflects stretched valuations despite operational strength, and Q3 results scheduled for October 15 remain pending.
Funds Buying (3)
| Fund | Manager | Shares Held | ∆ Shares | Position Value | % of Fund | QoQ | Status |
|---|---|---|---|---|---|---|---|
| Viking Global | Andreas Halvorsen | 4.8M | +3.4M | $420M | 1.2% | +246% | Existing |
| Point72 | Steve Cohen | 867K | +805K | $75M | 0.1% | >+999% | Existing |
| Lone Pine Capital | Steve Mandel | 578K | +578K | $50M | 0.3% | — | NEW |
Shares Held and Position Value reflect total quarter-end holdings. ∆ Shares is the change from the prior quarter. % of Fund is the position's share of the fund's reported equity portfolio — it drives the size weighting in the conviction score.
Portfolio Context
Where IBKR ranks in each buying fund's book, and the positions immediately around it. What a holding sits next to often says more about the thesis than the position size does.
position #29 of this fund's book
- 26ALPHABET INC$77M
- 27KODIAK GAS SVCS INC$63M
- 28VISA INC$57M
- 29INTERACTIVE BROKERS GROUP IN$50M
- 30TAIWAN SEMICONDUCTOR MANUFAC$48M
- 31SEA LTD$47M
- 32MCKESSON CORP$44M
position #30 of this fund's book
- 27CAMDEN PPTY TR$517M
- 28REGAL REXNORD CORPORATION$501M
- 29BIOMARIN PHARMACEUTICAL INC$436M
- 30INTERACTIVE BROKERS GROUP IN$420M
- 31DIGITAL RLTY TR INC$415M
- 32CARNIVAL CORP LTD$409M
- 33GENERAL MTRS CO$386M
Values are quarter-end position sizes. Shown only for funds where IBKR ranks inside their 40 largest equity positions — below that, neighbouring names carry no signal. Adjacency is an inference about a fund's reasoning, not a disclosure of it.
Insider Activity
Beneficial Ownership (13D/13G)
| Filer | Form | Shares | % of Class | Filed | Src |
|---|---|---|---|---|---|
| Vanguard Capital Management | SC 13G | 32.5M | 7.3% | 2026-04-30 | ↗ |
SC 13D = active intent to influence control (10-day filing deadline after crossing 5%). SC 13G = passive accumulation, no intent to influence control.