Interactive Brokers Group, Inc. (IBKR) Ownership
IBKR ownership summary
as of October 18, 2026- Institutions
- 88.5% of shares outstanding
- Insiders
- 2.67% of shares outstanding
- Shares outstanding
- 453.1M
- Float
- 438.4M shares available to trade
- Short interest
- 3.51% 13.7M shares short
- Days to cover
- 3.61 short interest up 10.6% vs prior month
- Institutions 88.55%
- Insiders 2.67%
- Other investors 8.78%
IBKR top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.31% | 33.1M | $2.74B | +1.8M (+5.6%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 6.26% | 28.3M | $2.34B | +169,559 (+0.6%) | June 30, 2026 |
| 3 | State Street Corp | 4.29% | 19.4M | $1.61B | +345,662 (+1.8%) | June 30, 2026 |
| 4 | FMR Inc | 2.61% | 11.8M | $978.1M | −673,133 (−5.4%) | June 30, 2026 |
| 5 | Geode Capital Management, LLC | 2.35% | 10.6M | $880.0M | +198,299 (+1.9%) | June 30, 2026 |
| 6 | Greenwich Wealth Management LLC | 2.19% | 9.9M | $820.4M | −2,288 (−0.0%) | June 30, 2026 |
| 7 | Amvescap Plc. | 2.14% | 9.7M | $802.8M | +61,812 (+0.6%) | June 30, 2026 |
| 8 | Vanguard Portfolio Management, LLC | 1.93% | 8.7M | $721.4M | −6.3M (−41.8%) | June 30, 2026 |
| 9 | Two Sigma Investments LLC | 1.84% | 8.3M | $689.7M | +27,429 (+0.3%) | June 30, 2026 |
| 10 | Wellington Management Company LLP | 1.63% | 7.4M | $610.4M | −2.4M (−24.5%) | June 30, 2026 |
| 11 | Kayne Anderson Rudnick Investment Management LLC | 1.41% | 6.4M | $526.4M | −3.7M (−36.4%) | June 30, 2026 |
| 12 | NORGES BANK | 1.40% | 6.3M | $523.8M | −712,106 (−10.1%) | June 30, 2026 |
| 13 | Orbis Allan Gray Ltd | 1.34% | 6.1M | $501.9M | −48,775 (−0.8%) | June 30, 2026 |
| 14 | London & Capital Asset Management Ltd | 1.32% | 6.0M | $494.1M | +59,833 (+1.0%) | June 30, 2026 |
| 15 | Bank of America Corp | 1.31% | 6.0M | $492.3M | −276,081 (−4.4%) | June 30, 2026 |
| 16 | American Century Companies Inc | 1.23% | 5.6M | $461.7M | −161,380 (−2.8%) | June 30, 2026 |
| 17 | Ninety One UK Limited | 1.16% | 5.3M | $434.8M | +5.3M (0.0%) | June 30, 2026 |
| 18 | JPMorgan Chase & Co | 1.15% | 5.2M | $429.0M | −1.5M (−22.8%) | June 30, 2026 |
| 19 | Morgan Stanley - Brokerage Accounts | 1.14% | 5.1M | $425.5M | +380,670 (+8.0%) | June 30, 2026 |
| 20 | Viking Global Investors LP | 1.07% | 4.8M | $399.5M | +3.4M (+246.5%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 11.7M shares and 10 cut 15.7M.
IBKR top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.97% | 13.4M | $1.11B | −30,554 (−0.2%) | August 31, 2026 |
| 2 | Vanguard 500 Index Investor | 2.63% | 11.9M | $984.0M | +63,306 (+0.5%) | September 30, 2026 |
| 3 | iShares Core S&P 500 ETF | 1.33% | 6.0M | $499.2M | −9,731 (−0.2%) | September 30, 2026 |
| 4 | Fidelity 500 Index | 1.28% | 5.8M | $478.2M | +22,212 (+0.4%) | August 31, 2026 |
| 5 | State Street® SPDR® S&P 500® ETF | 1.23% | 5.6M | $459.7M | — | September 30, 2026 |
| 6 | Invesco American Franchise Y | 0.89% | 4.1M | $334.9M | — | August 31, 2026 |
| 7 | American Century Ultra® Inv | 0.80% | 3.6M | $298.7M | −128,000 (−3.4%) | September 30, 2026 |
| 8 | Vanguard MStar Growth Index Investor | 0.73% | 3.3M | $274.3M | +440,057 (+15.3%) | September 30, 2026 |
| 9 | American Funds New Economy A | 0.71% | 3.2M | $264.6M | +247,906 (+8.4%) | September 30, 2026 |
| 10 | State Street®FinSelSectSPDR®ETF | 0.68% | 3.1M | $253.6M | −19,481 (−0.6%) | September 30, 2026 |
| 11 | Baron Focused Growth Retail | 0.54% | 2.5M | $203.0M | −6,800 (−0.3%) | September 30, 2026 |
| 12 | Vanguard Institutional Index I | 0.53% | 2.4M | $198.2M | +14,514 (+0.6%) | September 30, 2026 |
| 13 | Neuberger Quality Equity Inv | 0.50% | 2.3M | $186.8M | — | September 30, 2026 |
| 14 | Invesco S&P 500® Equal Weight ETF | 0.48% | 2.2M | $179.2M | −4,465 (−0.2%) | September 30, 2026 |
| 15 | Vanguard MStar Value Index Investor | 0.45% | 2.1M | $169.5M | +29,650 (+1.5%) | September 30, 2026 |
| 16 | Orbis Global Equity Investor | 0.40% | 1.8M | $151.6M | — | June 30, 2026 |
| 17 | TD Tactical Monthly Income F | 0.40% | 1.8M | $149.6M | — | June 30, 2026 |
| 18 | TD North American Dividend - I | 0.37% | 1.7M | $140.3M | — | June 30, 2026 |
| 19 | Waverton Strategic Equity A GBP | 0.36% | 1.6M | $133.1M | — | June 30, 2026 |
| 20 | AGF Global Select | 0.31% | 1.4M | $117.4M | +273 (+0.0%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
IBKR insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-01 | Lori A Conkling | Buy | $68.38 | 25 | $1,710 |
| 2026-02-24 | Ro Khanna | Sell | $71.92 | — | — |
| 2026-02-05 | Ro Khanna | Sell | $69.49 | — | — |
| 2026-01-27 | Earl H Nemser | Sell | $75.30 | 60,200 | $4.5M |
| 2026-01-26 | Earl H Nemser | Sell | $76.19 | 94,800 | $7.2M |
| 2026-01-23 | Earl H Nemser | Sell | $77.85 | 145,000 | $11.3M |
| 2026-01-23 | Ro Khanna | Buy | $77.58 | — | — |
| 2026-01-22 | Earl H Nemser | Sell | $76.81 | 100,000 | $7.7M |
| 2025-10-29 | Lawrence E Harris | Sell | $69.00 | 10,645 | $734,505 |
| 2025-10-28 | Lawrence E Harris | Sell | $69.15 | 6,855 | $474,023 |
| 2025-10-27 | Lawrence E Harris | Sell | $69.73 | 7,500 | $522,975 |
| 2025-10-24 | Lawrence E Harris | Sell | $68.50 | 8,000 | $548,000 |
| 2025-10-23 | Jill Bright | Buy | $65.95 | 400 | $26,380 |
| 2025-10-23 | Lawrence E Harris | Sell | $67.63 | 22,000 | $1.5M |
| 2025-10-14 | Lisa C. McClain | Sell | $69.36 | — | — |
| 2025-09-26 | Paul Jonathan Brody | Sell | $65.78 | 17,058 | $1.1M |
| 2025-09-25 | Paul Jonathan Brody | Sell | $64.81 | 14,296 | $926,524 |
| 2025-09-24 | Paul Jonathan Brody | Sell | $64.81 | 14,391 | $932,681 |
| 2025-09-23 | Paul Jonathan Brody | Sell | $65.30 | 19,025 | $1.2M |
| 2025-09-22 | Paul Jonathan Brody | Sell | $63.96 | 15,202 | $972,320 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
IBKR shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns IBKR
Institutional investors own 88.5% of Interactive Brokers's shares and insiders 2.67%. The largest holder is BlackRock Inc with 7.31% of the shares (33.1M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 10 reduced their stake in the latest filings. Short interest is 3.51% of the float, or 3.61 days of average trading volume. The share count rose 88.9% since 2014.
Related: IBKR analyst forecast, IBKR key metrics, IBKR dividend history. See the IBKR stock overview for the latest quote and news.
IBKR ownership FAQ
Who owns the most Interactive Brokers stock?
The largest shareholders of Interactive Brokers are BlackRock Inc (7.31%), Vanguard Capital Management, LLC (6.26%), State Street Corp (4.29%), FMR Inc (2.61%), Geode Capital Management, LLC (2.35%).
What percentage of Interactive Brokers is owned by institutions?
Institutions hold 88.5% of Interactive Brokers's shares outstanding; insiders hold 2.67%.
Which funds own Interactive Brokers?
The largest fund holders of Interactive Brokers are Vanguard MStar Total Stk Mkt Idx Invest (2.97%), Vanguard 500 Index Investor (2.63%), iShares Core S&P 500 ETF (1.33%), Fidelity 500 Index (1.28%), State Street® SPDR® S&P 500® ETF (1.23%).
What is Interactive Brokers's short interest?
13.7M shares of Interactive Brokers were sold short, 3.51% of the float; at the average daily volume it would take 3.61 days to cover.
Are insiders buying or selling Interactive Brokers?
Of the latest 20 reported insider transactions in Interactive Brokers (since September 22, 2025), 3 were purchases and 17 were sales.
How many shares of Interactive Brokers are outstanding?
Interactive Brokers has 453.1M shares outstanding, of which 438.4M are in the public float.