Interactive Brokers Group, Inc.
IBKR- Exchange
- Nasdaq
- Industry
- Security Brokers, Dealers & Flotation Companies
- SEC CIK
- 0001381197
In the last 90 days, Interactive Brokers Group, Inc. insiders filed 2 open-market purchases and 0 sales; 1,119 institutions reported holding it in 13F filings for Q2 2026, worth $33.7B in total; 3 superinvestors hold it, including Viking Global Investors and Lone Pine Capital.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Interactive Brokers Group, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 2 filings
- 1 insider, $4.54K in total
- Open-market sells
- 0 filings
- Insiders trading
- 1
- Net value
- +$4.54K
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Interactive Brokers Group, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Conkling Lori A | Director | 2,559 | Sep 2, 2026 | 9 |
| Nemser Earl H | Vice Chairman | 803,568Indirect | Aug 4, 2026 | 6 |
| Frank Thomas AJ | Executive Vice President | 251,518 | May 28, 2026 | 2 |
| Brody Paul Jonathan | Chief Financial Officer | 2,856,806 | May 28, 2026 | 4 |
| Galik Milan | Chief Executive Officer | 3,215,389 | May 28, 2026 | 4 |
| Mendonca Denis | Chief Accounting Officer | 145,071 | May 28, 2026 | 2 |
| Harris Lawrence E | Director | 173,482 | Apr 29, 2026 | 6 |
| Bright Jill | Director | 11,082 | Jan 26, 2026 | 3 |
| Peterffy William | Director | 10,126 | Jan 26, 2026 | 2 |
| Yuen Nicole | Director | 10,126 | Jan 26, 2026 | 2 |
| Repetto Richard H | Director | 3,046 | Jan 26, 2026 | 2 |
| Peterffy Thomas | Chairman | 1,516,182 | Feb 24, 2025 | 0 |
| Uhde Philip | Director | 2,572 | Jan 9, 2024 | 0 |
| Katz Gary | Director | 1,928 | Jan 6, 2023 | 0 |
| Damgard John M. | Director | 2,188 | Jan 6, 2022 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 29, 2025 (view filing) | Sep 25-26 | 4 days | Brody Paul JonathanChief Financial Officer | SSaleClass A common stock | −31.4K | $65.34 | −$2.05M | −52.6%28.3K after | 5 lots10b5-1 |
| Oct 1, 2025 (view filing) | Sep 29-30 | 2 days | Brody Paul JonathanChief Financial Officer | SSaleClass A common stock | −21.4K | $68.11 | −$1.45M | −75.5%6.93K after | 5 lots10b5-1 |
| Oct 3, 2025 (view filing) | Sep 19 | 14 days | Brody Paul JonathanChief Financial Officer | SSaleClass A common stock | −6.93K | $64.66 | −$448.0K | −6.4%101.5K after | Amended10b5-1 |
| Oct 27, 2025 (view filing) | Oct 23-24 | 4 days | Harris Lawrence EDirector | SSaleClass A common stock | −30.0K | $67.86 | −$2.04M | −11.8%223.7K after | 2 lots |
| Oct 27, 2025 (view filing) | Oct 23 | 4 days | Bright JillDirector | PPurchaseClass A common stock | +400 | $65.95 | +$26.4K | +4.0%10.3K after | |
| Oct 29, 2025 (view filing) | Oct 27-28 | 2 days | Harris Lawrence EDirector | SSaleClass A common stock | −14.4K | $69.45 | −$997.0K | −6.4%209.3K after | 2 lots |
| Oct 31, 2025 (view filing) | Oct 29 | 2 days | Harris Lawrence EDirector | SSaleClass A common stock | −10.6K | $69.00 | −$734.5K | −5.1%198.7K after | |
| Jan 26, 2026 (view filing) | Jan 22-23 | 4 days | Nemser Earl HVice Chairman | SSaleClass A common stock | −245.0K | $77.43 | −$19.0M | −61.3%155.0K after | 3 lots |
| Jan 28, 2026 (view filing) | Jan 26-27 | 2 days | Nemser Earl HVice Chairman | SSaleClass A common stock | −155.0K | $75.84 | −$11.8M | −100.0%0 after | 5 lots |
| Mar 26, 2026 (view filing) | Feb 25-Mar 2 | 29 daysLate | Conkling Lori ADirector | PPurchaseClass A common stock | +75 | $71.88 | +$5.39K | +3.2%2.41K after | 2 lots10b5-1 |
| Apr 2, 2026 (view filing) | Apr 1 | 1 day | Conkling Lori ADirector | PPurchaseClass A common stock | +25 | $68.38 | +$1.71K | +1.0%2.43K after | 10b5-1 |
| Apr 29, 2026 (view filing) | Apr 28 | 1 day | Harris Lawrence EDirector | SSaleClass A common stock | −26.0K | $76.93 | −$2.00M | −13.0%173.5K after | |
| May 4, 2026 (view filing) | May 1 | 3 days | Conkling Lori ADirector | PPurchaseClass A common stock | +25 | $79.64 | +$1.99K | +1.0%2.46K after | 10b5-1 |
| Jun 2, 2026 (view filing) | Jun 1 | 1 day | Conkling Lori ADirector | PPurchaseClass A common stock | +25 | $86.10 | +$2.15K | +1.0%2.48K after | 10b5-1 |
| Jul 1, 2026 (view filing)4:01 PM ET | Jul 1 | Same day | Conkling Lori ADirector | PPurchaseClass A common stock | +25 | $88.03 | +$2.20K | +1.0%2.51K after | 10b5-1 |
| Aug 4, 2026 (view filing)4:01 PM ET | Aug 3 | 1 day | Conkling Lori ADirector | PPurchaseClass A common stock | +25 | $87.03 | +$2.18K | +1.0%2.53K after | 10b5-1 |
| Sep 2, 2026 (view filing)4:01 PM ET | Sep 1 | 1 day | Conkling Lori ADirector | PPurchaseClass A common stock | +25 | $94.53 | +$2.36K | +1.0%2.56K after | 10b5-1 |