Interactive Brokers IBKR
$75.82 +$3.09 (+4.25%)
Market closed · Nov 6, 8:10 pm ET · Last extended-hours $76.00 +0.24%
Open$74.18
Prev close$72.73
Day range$73.85 – $76.71
Volume5.77M
Market cap$34.35B
P/E (TTM)28.9
Dividend yield0.44%
Ownership & positioning
Who holds it, who is betting against it, and where the big money is moving
Institutional ownership87.2%-0.61 pts vs. prior quarter
Institutions holding1,367+24 vs. prior quarter
Insider trades (recent)34 buys / 16 sellsNet buying
Short interest2.88% of floatDays to cover 3.5 · as of 15 Oct 2026
Short-sale volume share11.0%5-day average of daily volume
Short-sale volume as % of daily volume
Large-order net flow, last 20 sessions
Net of large-order buying minus selling, in USD. Over this window: −$89.93M (4 inflow days, 16 outflow days).
Net flow by order size, last 20 sessions
Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.
The five largest holders on file together own 23.0% of shares outstanding.
Largest holders
By investor type
Reported short interest has risen from 2.08% to 2.88% of float over the last 6 biweekly reports (31 Jul 2026 to 15 Oct 2026).
Recent institutional activity
| Holder | Type | Period | Share change | New stake |
|---|---|---|---|---|
| Amundi Luxembourg S.A. | Mutual Fund | 2026/Q3 | +888,724 | 0.2% |
| Earl Nemser | Individual/Insider | 2026/Q3 | +803,568 | 0.3% |
| Ninety One UK Limited | Mutual Fund | 2026/Q3 | +5,393,890 | 1.2% |
| Viking Global Investors LP | Hedge Fund | 2026/Q3 | +3,436,419 | 1.1% |
| BlackRock | Mutual Fund | 2026/Q3 | +1,754,626 | 7.3% |
| Jane Street Group, LLC | Private Company | 2026/Q3 | +1,582,338 | 0.7% |
| AGF Management Limited | Mutual Fund | 2026/Q3 | +1,451,924 | 0.3% |
| TD Asset Management | Mutual Fund | 2026/Q3 | +1,389,010 | 0.8% |
| D. E. Shaw & Co., L.P. | Hedge Fund | 2026/Q3 | +1,111,026 | 0.4% |
| Qube Research & Technologies Ltd | Mutual Fund | 2026/Q3 | +1,067,817 | 0.3% |
| UBS Asset Management | Mutual Fund | 2026/Q3 | +955,527 | 1.2% |
| Deutsche Asset & Wealth Management | Mutual Fund | 2026/Q3 | +954,270 | 0.4% |
| The Goldman Sachs Group, Inc. | Public Company | 2026/Q3 | +940,445 | 0.5% |
| Hudson River Trading LLC | Private Company | 2026/Q3 | +869,462 | 0.4% |
| Neuberger Berman Investment Advisers LLC | Mutual Fund | 2026/Q3 | +868,893 | 1.0% |
Institutional buy/sell activity by reporting period, largest moves first.
Insider transactions
| Date | Insider | Title | Transaction | Shares | Price | Held after |
|---|---|---|---|---|---|---|
| 30 Sep 2026 | Lori Conkling | Independent Director | Open Market Acquisition | +25 | $85.42 | 1,028 |
| 31 Aug 2026 | Lori Conkling | Independent Director | Open Market Acquisition | +25 | $94.53 | 1,003 |
| 2 Aug 2026 | Lori Conkling | Independent Director | Open Market Acquisition | +25 | $87.03 | 978 |
| 30 Jul 2026 | Earl Nemser | Vice Chairperson | Other Acquisition | +803,568 | $87.99 | 1,151,501 |
| 30 Jun 2026 | Lori Conkling | Independent Director | Open Market Acquisition | +25 | $88.03 | 953 |
| 31 May 2026 | Lori Conkling | Independent Director | Open Market Acquisition | +25 | $86.10 | 1,317 |
| 7 May 2026 | Paul Brody | CFO, Treasurer, Secretary & Director | Sale to Issuer | -82,920 | $84.42 | 2,647,413 |
| 7 May 2026 | Earl Nemser | Vice Chairperson | Sale to Issuer | -22,486 | $84.42 | 347,933 |
| 7 May 2026 | Milan Galik | Chief Executive Officer | Sale to Issuer | -255,039 | $84.42 | 2,475,491 |
| 7 May 2026 | Thomas A. Frank | Executive Vice President | Sale to Issuer | -31,730 | $84.42 | 177,153 |
| 7 May 2026 | Denis Mendonca | Chief Accounting Officer | Sale to Issuer | -11,157 | $84.42 | 104,453 |
| 30 Apr 2026 | Lori Conkling | Independent Director | Open Market Acquisition | +25 | $79.64 | 903 |
| 27 Apr 2026 | Lawrence Harris | Lead Independent Director | Open Market Disposition | -26,000 | $76.93 | 173,482 |
| 31 Mar 2026 | Lori Conkling | Independent Director | Open Market Acquisition | +25 | $68.38 | 878 |
| 1 Mar 2026 | Lori Conkling | Independent Director | Automatic Acquisition | +75 | $73.21 | 853 |
| 26 Jan 2026 | Earl Nemser | Vice Chairperson | Open Market Disposition | -155,000 | $77.98 | 309,662 |
| 22 Jan 2026 | Earl Nemser | Vice Chairperson | Open Market Disposition | -245,000 | $78.14 | 464,662 |
| 21 Jan 2026 | Earl Nemser | Vice Chairperson | Intent to Sell (Form 144) | -400,000 | $75.80 | – |
| 31 Dec 2025 | Paul Brody | CFO, Treasurer, Secretary & Director | Other Acquisition | +389 | $64.31 | 2,550,087 |
| 31 Dec 2025 | Richard Repetto | Independent Director | Other Acquisition | +389 | $64.31 | 1,686 |
From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.
Short interest, by report
| Report date | Shares short | % of float | Days to cover |
|---|---|---|---|
| 15 Oct 2026 | 13,050,620 | 2.9% | 3.5 |
| 30 Sep 2026 | 13,713,846 | 3.0% | 3.5 |
| 15 Sep 2026 | 12,396,995 | 2.7% | 3.5 |
| 31 Aug 2026 | 10,298,397 | 2.3% | 2.7 |
| 14 Aug 2026 | 8,095,922 | 1.8% | 1.8 |
| 31 Jul 2026 | 9,250,070 | 2.1% | 2.0 |
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