Who owns IBKR? 13F holders and whale ownership
IBKR is tracked across public portfolios in Whale Analyzer. This page answers who owns IBKR, which top funds are buying IBKR, aggregate disclosed value, and recent position changes based on public data. Thomas Peterffy is the largest reported holder at $37.90B; the top five funds control 100.0% of reported ownership; institutions were net selling last quarter (1 increased, 1 reduced); the stock trades above the aggregate whale cost basis of $67.07. Top tracked holders include Thomas Peterffy, Andreas Halvorsen, and George Soros.
Continue to the live IBKR dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Thomas Peterffy insider transaction profile Interactive Brokers Group holdings | $37.90B | 189.5M | Held |
| Andreas Halvorsen 13F portfolio Viking Global Investors holdings | $93.5M | 1.4M | New |
| George Soros 13F portfolio Soros Fund Management holdings | $43.3M | 645.3K | Reduced |
Ownership concentration
Reported ownership of IBKR is highly concentrated across tracked institutions.
- Single largest holder: 99.6% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 3 tracked institutions, 1 held, 1 increased, 1 reduced. Net positioning is net selling.
- Andreas Halvorsen — Viking Global Investors ($93.5M) · avg cost $67.07
- George Soros — Soros Fund Management ($43.3M) (▼ 16.3% qoq shares)
Whale cost basis vs current price
The aggregate tracked cost basis is $67.07 versus a current price of $89.82, so IBKR trades above its cost basis (+33.9%). Average unrealized P&L across tracked holders: 24%.
Sector positioning — Financials
IBKR sits within the Financials sector alongside 84 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time 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 3 public institutional holders of IBKR with a combined reported value of $38.04B. See the holder table above for the largest tracked positions.
Which top funds are buying IBKR?
Tracked institutions were net selling last quarter — 1 held, 1 increased, 1 reduced. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is IBKR ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is IBKR above or below the whale cost basis?
The aggregate tracked cost basis is $67.07 versus a current price of $89.82 (+33.9%).
What does 13F ownership mean for IBKR?
Use the interactive IBKR dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.