11 insiders reported 127 Form 4 transactions for Interactive Brokers Group, Inc. (IBKR) over the past 18 months (most recent 2026-08-04). Recent activity: Conkling Lori A (Director) Buy 25 shares, Nemser Earl H (Vice Chairman) Buy 803,568 shares, Conkling Lori A (Director) Buy 25 shares, Conkling Lori A (Director) Buy 25 shares, Nemser Earl H (Vice Chairman) Sell 22,486 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-04 | Conkling Lori A | Director | Buy | 25 | $2,176 |
| 2026-08-04 | Nemser Earl H | Vice Chairman | Buy | 803,568 | $70.7M |
| 2026-07-01 | Conkling Lori A | Director | Buy | 25 | $2,201 |
| 2026-06-02 | Conkling Lori A | Director | Buy | 25 | $2,152 |
| 2026-05-28 | Nemser Earl H | Vice Chairman | Sell | 22,486 | $1.9M |
| 2026-05-28 | Frank Thomas AJ | Executive Vice President | Sell | 31,730 | $2.7M |
| 2026-05-28 | Brody Paul Jonathan | Chief Financial Officer | Sell | 82,920 | $7.0M |
| 2026-05-28 | Galik Milan | Chief Executive Officer | Sell | 255,039 | $21.5M |
| 2026-05-28 | Mendonca Denis | Chief Accounting Officer | Sell | 11,157 | $941,874 |
| 2026-05-04 | Conkling Lori A | Director | Buy | 25 | $1,991 |
| 2026-04-29 | Harris Lawrence E | Director | Sell | 26,000 | $2.0M |
| 2026-04-02 | Conkling Lori A | Director | Buy | 25 | $1,710 |
| 2026-03-26 | Conkling Lori A | Director | Buy | 50 | $3,660 |
| 2026-03-26 | Conkling Lori A | Director | Buy | 25 | $1,730 |
| 2026-01-28 | Nemser Earl H | Vice Chairman | Sell | 60,882 | $4.6M |
| 2026-01-28 | Nemser Earl H | Vice Chairman | Sell | 30,817 | $2.4M |
| 2026-01-28 | Nemser Earl H | Vice Chairman | Sell | 3,101 | $241,816 |
| 2026-01-28 | Nemser Earl H | Vice Chairman | Sell | 39,731 | $3.0M |
| 2026-01-28 | Nemser Earl H | Vice Chairman | Sell | 20,469 | $1.6M |
| 2026-01-26 | Nemser Earl H | Vice Chairman | Sell | 100,000 | $7.7M |
| 2026-01-26 | Conkling Lori A | Director | Buy | 389 | $0 |
| 2026-01-26 | Nemser Earl H | Vice Chairman | Sell | 60,065 | $4.7M |
| 2026-01-26 | Galik Milan | Chief Executive Officer | Buy | 389 | $25,017 |
| 2026-01-26 | Yuen Nicole | Director | Buy | 389 | $25,017 |
| 2026-01-26 | Nemser Earl H | Vice Chairman | Sell | 84,935 | $6.6M |
Source: SEC Form 4 filings · as of 2026-08-04