Interactive Brokers
IBKR
1,108 hedge funds and large institutions have $33.7B invested in Interactive Brokers in 2026 Q2 according to their latest regulatory filings, with 196 funds opening new positions, 396 increasing their positions, 378 reducing their positions, and 67 closing their positions.
193% more first-time investments, than exits
New positions opened: 196 | Existing positions closed: 67
34% more call options, than puts
Call options by funds: $473M | Put options by funds: $352M
33% more capital invested
Capital invested by funds: $25.4B → $33.7B (+$8.29B)
11% more funds holding
Funds holding: 998 → 1,108 (+110)
3% more funds holding in top 10
Funds holding in top 10: 35 → 36 (+1)
1.76% more ownership
Funds ownership: 85.13% → 86.89% (+1.8%)
5% more repeat investments, than reductions
Existing positions increased: 396 | Existing positions reduced: 378
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Ninety One (UK)
London,
United Kingdom
|
+$438M |
| 2 |
Viking Global Investors
Stamford,
Connecticut
|
+$286M |
| 3 |
BlackRock
New York
|
+$146M |
| 4 |
Jane Street
New York
|
+$132M |
| 5 |
AM
AGF Management
Toronto,
Ontario, Canada
|
+$121M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CCM
Cantillon Capital Management
New York
|
-$893M |
| 2 |
Vanguard Portfolio Management
Malvern,
Pennsylvania
|
-$521M |
| 3 |
Kayne Anderson Rudnick Investment Management
Los Angeles,
California
|
-$304M |
| 4 |
Wellington Management Group
Boston,
Massachusetts
|
-$199M |
| 5 |
ECU
Egerton Capital (UK)
London,
United Kingdom
|
-$179M |
IBKR Hedge Fund Activity: Q2 2026 in Review
1,108 of the 8,279 institutional investors tracked by Wall St. Rank reported a position in Interactive Brokers (IBKR) for Q2 2026, worth a combined $33.7B — up 33% from $25.4B a quarter earlier.
Buyers outnumbered sellers: 196 funds opened new IBKR positions and 67 closed out — a net gain of 129 holders — while 396 added to existing stakes and 378 trimmed.
The largest buyer was Ninety One (UK), opening a new position worth an estimated $438M. The largest seller was Cantillon Capital Management, cutting an estimated $893M.
- 1,108 institutional investors held Interactive Brokers (IBKR) as of Q2 2026, up from 998 in Q1 2026.
- Funds reported $33.7B of Interactive Brokers stock for Q2 2026, up 33% quarter-over-quarter.
- 196 funds opened new Interactive Brokers positions in Q2 2026 and 67 closed out, a net change of +129 holders.
- The largest Interactive Brokers buyer in Q2 2026 was Ninety One (UK), an estimated $438M added.
- The largest Interactive Brokers seller in Q2 2026 was Cantillon Capital Management, an estimated $893M sold.
Based on aggregated 13F filings for Q2 2026.