Interactive Brokers
IBKR
909 hedge funds and large institutions have $26.1B invested in Interactive Brokers in 2025 Q3 according to their latest regulatory filings, with 191 funds opening new positions, 312 increasing their positions, 301 reducing their positions, and 78 closing their positions.
145% more first-time investments, than exits
New positions opened: 191 | Existing positions closed: 78
25% more capital invested
Capital invested by funds: $20.9B → $26.1B (+$5.2B)
17% more funds holding in top 10
Funds holding in top 10: 30 → 35 (+5)
13% more funds holding
Funds holding: 802 → 909 (+107)
4% more repeat investments, than reductions
Existing positions increased: 312 | Existing positions reduced: 301
1% more call options, than puts
Call options by funds: $601M | Put options by funds: $597M
261.49% less ownership
Funds ownership: 346.75% → 85.26% (-261%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
+$695M |
| 2 |
Geode Capital Management
Boston,
Massachusetts
|
+$230M |
| 3 |
State Street
Boston,
Massachusetts
|
+$221M |
| 4 |
TD Asset Management
Toronto,
Ontario, Canada
|
+$138M |
| 5 |
Wellington Management Group
Boston,
Massachusetts
|
+$103M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$583M |
| 2 |
Marshall Wace
London,
United Kingdom
|
-$121M |
| 3 |
AM
AGF Management
Toronto,
Ontario, Canada
|
-$114M |
| 4 |
ECU
Egerton Capital (UK)
London,
United Kingdom
|
-$113M |
| 5 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$95.5M |
IBKR Hedge Fund Activity: Q3 2025 in Review
909 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Interactive Brokers (IBKR) for Q3 2025, worth a combined $26.1B — up 25% from $20.9B a quarter earlier.
Buyers outnumbered sellers: 191 funds opened new IBKR positions and 78 closed out — a net gain of 113 holders — while 312 added to existing stakes and 301 trimmed.
The largest buyer was Vanguard Group, adding an estimated $695M. The largest seller was BlackRock, cutting an estimated $583M.
- 909 institutional investors held Interactive Brokers (IBKR) as of Q3 2025, up from 802 in Q2 2025.
- Funds reported $26.1B of Interactive Brokers stock for Q3 2025, up 25% quarter-over-quarter.
- 191 funds opened new Interactive Brokers positions in Q3 2025 and 78 closed out, a net change of +113 holders.
- The largest Interactive Brokers buyer in Q3 2025 was Vanguard Group, an estimated $695M added.
- The largest Interactive Brokers seller in Q3 2025 was BlackRock, an estimated $583M sold.
Based on aggregated 13F filings for Q3 2025.