Whale Analyzer
IBKR Institutional Holders and 13F Ownership
Compare 9 tracked holders of IBKR, their reported positions and disclosed changes. Coverage is limited to the investors tracked by Whale Analyzer; these records do not establish all shareholders or current trades. Available original SEC filings for tracked 13F holders are linked below. Top tracked holders include Viking Global Investors, Egerton Capital, Oakcliff Capital, and National Pension Service.
Continue to the live IBKR dashboardTop holders
| Investor | Reported value | Shares | Change | Report date |
|---|---|---|---|---|
| Viking Global Investors 13F holdings | $420.5M | 4.8M | Increased | 2026-06-30 |
| Egerton Capital 13F holdings | $270.0M | 3.2M | Reduced | 2026-09-30 |
| Oakcliff Capital 13F holdings | $89.7M | 1.0M | Held | 2026-06-30 |
| National Pension Service 13F holdings | $77.9M | 895.1K | Reduced | 2026-06-30 |
| Lone Pine Capital 13F holdings | $50.3M | 577.7K | New | 2026-06-30 |
| RV Capital GmbH 13F holdings | $48.8M | 561.1K | Reduced | 2026-06-30 |
| Cantillon Capital Management 13F holdings | $45.1M | 517.8K | Reduced | 2026-06-30 |
| Soros Fund Management 13F holdings | $13.2M | 151.5K | Reduced | 2026-06-30 |
| Bridgewater Associates 13F holdings | $3.7M | 42.1K | Reduced | 2026-06-30 |
Original SEC filing sources
These recorded filings support the tracked 13F rows included in the aggregate reported values on this page. See each holder profile for source coverage and context for other disclosure types.
- Viking Global Investors SEC filing (0001103804-26-000006) · report date 2026-06-30
- Egerton Capital SEC filing (0001581811-26-000009) · report date 2026-09-30
- Oakcliff Capital SEC filing (0001172661-26-003363) · report date 2026-06-30
- National Pension Service SEC filing (0001193125-26-347818) · report date 2026-06-30
- Lone Pine Capital SEC filing (0000919574-26-005485) · report date 2026-06-30
- RV Capital GmbH SEC filing (0001766596-26-000007) · report date 2026-06-30
- Cantillon Capital Management SEC filing (0001279936-26-000005) · report date 2026-06-30
- Soros Fund Management SEC filing (0000902664-26-003507) · report date 2026-06-30
- Bridgewater Associates SEC filing (0001350694-26-000003) · report date 2026-06-30
Tracked-sample concentration
Reported position value for IBKR is highly concentrated within this tracked-holder sample. These percentages are not market-wide ownership shares.
- Largest tracked holder: 41.3% of aggregate reported value in this sample
- Top 5 tracked holders: 89.1% of aggregate reported value in this sample
- Top 10 tracked holders: 100.0% of aggregate reported value in this sample
Whale activity this quarter
Across 9 tracked holders, 6 reduced, 2 increased, 1 held. Net positioning is net selling.
- Viking Global Investors ($420.5M) (▲ 246.5% qoq shares) · modeled avg cost estimate $73.35
- Egerton Capital ($270.0M) (▼ 23.5% qoq shares)
- Oakcliff Capital ($89.7M) (→ 0.0% qoq shares)
- National Pension Service ($77.9M) (▼ 1.5% qoq shares) · modeled avg cost estimate $47.57
- Lone Pine Capital ($50.3M) · modeled avg cost estimate $75.90
- RV Capital GmbH ($48.8M) (▼ 26.0% qoq shares)
- Cantillon Capital Management ($45.1M) (▼ 95.4% qoq shares)
- Soros Fund Management ($13.2M) (▼ 76.5% qoq shares)
Modeled cost estimate vs current price
The share-weighted modeled cost estimate across 3 covered tracked holders is $69.92 versus a current price of $75.82, so IBKR trades above that estimate (+8.4%). This model does not establish any filer's actual purchase price, unrealized gain, or investment return.
Sector positioning — Financials
IBKR sits within the Financials sector alongside 139 other tracked names. Compare reported positions across tracked peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time or market-wide ownership totals. Open the live IBKR dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
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Learn more in Whale Analyzer Academy
Deepen your read on IBKR with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns IBKR stock?
Whale Analyzer tracks 9 public-disclosure holders of IBKR with a combined reported value of $1.02B. See the holder table above for the largest tracked positions.
Which top funds are buying IBKR?
Tracked holders were net selling last quarter — 6 reduced, 2 increased, 1 held. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is the tracked IBKR sample?
The top five tracked holders account for 89.1% of aggregate reported value in this tracked sample. This is not a market-wide ownership percentage.
How does IBKR compare with the modeled cost estimate?
The share-weighted modeled cost estimate across 3 covered tracked holders is $69.92 versus a current price of $75.82 (+8.4%). It is not an actual purchase price, unrealized gain, or investment return.
What does 13F ownership mean for IBKR?
These are historical reported positions from tracked filers, not real-time ownership or a complete shareholder register. Use the interactive IBKR dashboard to explore them, or read our 13F Alpha Signals Guide.