Interactive Brokers Group, Inc.
An automated electronic brokerage serving individual investors, advisors, and hedge funds, Interactive Brokers lets clients trade stocks, options, futures, forex, bonds, and crypto from one platform through tiers like IBKR Pro and commission-free IBKR Lite. It traces back to Hungarian immigrant Thomas Peterffy, who started as a market maker in 1977 and later turned his Timber Hill trading systems into an outside brokerage in 1993. A technology pioneer, Peterffy built what is considered the first handheld computer for trading floors.
Granted 4.2K
Bought 390.7K
Sold 210.7K
Granted 2.94M · Bought 2.1K · Sold 1.04M
Granted 3.62M · Sold 2.43M
Granted 11.25M · Sold 9.37M
Bought 165.5K
Sold 89.3K
Granted 2.82M · Sold 2.74M
Granted 7.01M · Sold 6.86M
Granted 2.3K · Bought 60.0K · Sold 81.0K
Granted 65.5K · Sold 9.7K
Sold 1.7K
Granted 10.5K · Bought 5.0K
Granted 2.5K · Bought 535
Granted 3.1K
Granted 3.1K
Bought 5.0K
Granted 4.2K
Granted 4.2K
Granted 1.3K
Granted 2.6K
Granted 2.6K · Sold 108.8K
Granted 2.3K · Bought 150
Granted 1.7K
Granted 1.9K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Drew John +6 co-filersMay be part of a 13(d) group, Director · 1 transaction | — | 5.00Mas of Jan 2010 | 4.2K | — | — |
| Marshall Christopher P +5 co-filersMay be part of a 13(d) group · 15 transactions | — | 3.51Mas of Aug 2009 | — | 390.7K | — |
| Marshall Christopher P +8 co-filersMay be part of a 13(d) group · 6 transactions | — | 3.30Mas of Dec 2012 | — | — | 210.7K |
| Galik MilanChief Executive Officer, Director · 1006 transactions | — | 3.22M | 2.94M | 2.1K | 1.04M |
| Brody Paul JonathanChief Financial Officer, Director · 685 transactions | — | 2.86M | 3.62M | — | 2.43M |
| Peterffy ThomasChairman, Director · 1028 transactions | — | 1.52Mas of Feb 2025 | 11.25M | — | 9.37M |
| Drew John +7 co-filersMay be part of a 13(d) group · 5 transactions | — | 1.49Mas of Aug 2009 | — | 165.5K | — |
| Drew John +6 co-filersMay be part of a 13(d) group · 2 transactions | — | 1.40Mas of Dec 2012 | — | — | 89.3K |
| Nemser Earl HVice Chairman, Director · 448 transactions | — | 429.3K | 2.82M | — | 2.74M |
| Frank Thomas AJExecutive Vice President · 814 transactions | — | 251.5K | 7.01M | — | 6.86M |
| Harris Lawrence EDirector · 35 transactions | — | 173.5K | 2.3K | 60.0K | 81.0K |
| Mendonca DenisChief Accounting Officer · 24 transactions | — | 145.1K | 65.5K | — | 9.7K |
| Uhde Philip +1 co-filerReporting owner · 2 transactions | — | 110.5Kas of Apr 2020 | — | — | 1.7K |
| Gates Richard J.Director · 4 transactions | — | 15.5Kas of Jan 2013 | 10.5K | 5.0K | — |
| Bright JillDirector · 8 transactions | — | 11.1K | 2.5K | 535 | — |
| Peterffy WilliamDirector · 7 transactions | — | 10.1K | 3.1K | — | — |
| Yuen NicoleDirector · 7 transactions | — | 10.1K | 3.1K | — | — |
| DeFeo Philip DDirector · 1 transaction | — | 5.0Kas of Jul 2007 | — | 5.0K | — |
| Riley Ivers WDirector · 1 transaction | — | 4.2Kas of Dec 2008 | 4.2K | — | — |
| Stoll Hans R.Director · 1 transaction | — | 4.2Kas of Dec 2008 | 4.2K | — | — |
| Repetto Richard HDirector · 4 transactions | — | 3.0K | 1.3K | — | — |
| Wagner Wayne HilbertDirector · 1 transaction | — | 2.6Kas of Dec 2014 | 2.6K | — | — |
| Uhde PhilipDirector · 8 transactions | — | 2.6Kas of Dec 2023 | 2.6K | — | 108.8K |
| Conkling Lori ADirector · 9 transactions | — | 2.5K | 2.3K | 150 | — |
| Damgard John M.Director · 2 transactions | — | 2.2Kas of Dec 2021 | 1.7K | — | — |
| Katz GaryDirector · 3 transactions | — | 1.9Kas of Dec 2022 | 1.9K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -22.30M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.