Interactive Brokers Group, Inc.
IBKRLast close · Oct 16, 202682.69−3.34 (−3.88%)
Market cap$145.3B
Between Dec 31, 2025 and Oct 1, 2026, Interactive Brokers (IBKR) insiders filed 40 Form 4 transactions: 9 sales worth $32.7M in total and 9 open-market purchases worth $20,119. The largest seller was Nemser Earl H, $7.7M. 22 other filings were grants, exercises or gifts, which say nothing about buying or selling.
40
9
9
9
Form 4 transactions
| Date | Insider | Title | Code | Plan | Shares | Price | Value |
|---|---|---|---|---|---|---|---|
| 2026-10-01 | Conkling Lori A | Director | P | 10b5-1 | 25 | 85.42 | $2,135.5 |
| 2026-09-01 | Conkling Lori A | Director | P | 10b5-1 | 25 | 94.53 | $2,363.3 |
| 2026-07-31 | Nemser Earl H | Vice Chairman | A | 803,568 | 87.99 | $70.7M | |
| 2026-08-03 | Conkling Lori A | Director | P | 10b5-1 | 25 | 87.03 | $2,175.8 |
| 2026-07-01 | Conkling Lori A | Director | P | 10b5-1 | 25 | 88.03 | $2,200.8 |
| 2026-06-01 | Conkling Lori A | Director | P | 10b5-1 | 25 | 86.10 | $2,152.5 |
| 2026-05-08 | Brody Paul Jonathan | Chief Financial Officer | F | 82,920 | 84.42 | $7.0M | |
| 2026-05-08 | Mendonca Denis | Chief Accounting Officer | F | 11,157 | 84.42 | $941,873.9 | |
| 2026-05-08 | Galik Milan | Chief Executive Officer | F | 255,039 | 84.42 | $21.5M | |
| 2026-05-08 | Frank Thomas AJ | Executive Vice President | F | 31,730 | 84.42 | $2.7M | |
| 2026-05-08 | Nemser Earl H | Vice Chairman | F | 22,486 | 84.42 | $1.9M | |
| 2026-05-01 | Conkling Lori A | Director | P | 10b5-1 | 25 | 79.64 | $1,991 |
| 2026-04-28 | Harris Lawrence E | Director | S | 26,000 | 76.93 | $2.0M | |
| 2026-04-01 | Conkling Lori A | Director | P | 10b5-1 | 25 | 68.38 | $1,709.5 |
| 2026-02-25 | Conkling Lori A | Director | P | 10b5-1 | 50 | 73.21 | $3,660.5 |
| 2026-03-02 | Conkling Lori A | Director | P | 10b5-1 | 25 | 69.21 | $1,730.2 |
| 2026-01-26 | Nemser Earl H | Vice Chairman | S | 60,882 | 75.83 | $4.6M | |
| 2026-01-26 | Nemser Earl H | Vice Chairman | S | 30,817 | 76.72 | $2.4M | |
| 2026-01-26 | Nemser Earl H | Vice Chairman | S | 3,101 | 77.98 | $241,816 | |
| 2026-01-27 | Nemser Earl H | Vice Chairman | S | 39,731 | 75.07 | $3.0M | |
| 2026-01-27 | Nemser Earl H | Vice Chairman | S | 20,469 | 75.75 | $1.6M | |
| 2026-01-22 | Nemser Earl H | Vice Chairman | S | 100,000 | 76.81 | $7.7M | |
| 2026-01-23 | Nemser Earl H | Vice Chairman | S | 84,935 | 77.65 | $6.6M | |
| 2026-01-23 | Nemser Earl H | Vice Chairman | S | 60,065 | 78.14 | $4.7M | |
| 2026-01-01 | Peterffy William | Director | A | 389 | 64.31 | $25,016.6 | |
| 2026-01-01 | Nemser Earl H | Vice Chairman | A | 389 | 64.31 | $25,016.6 | |
| 2026-01-01 | Brody Paul Jonathan | Chief Financial Officer | A | 389 | 64.31 | $25,016.6 | |
| 2026-01-01 | Galik Milan | Chief Executive Officer | A | 389 | 64.31 | $25,016.6 | |
| 2026-01-01 | Harris Lawrence E | Director | A | 389 | 64.31 | $25,016.6 | |
| 2025-12-31 | Conkling Lori A | Director | A | 389 | 0.00 | $0 | |
| 2026-01-01 | Conkling Lori A | Director | A | 389 | 64.31 | $25,016.6 | |
| 2026-01-01 | Bright Jill | Director | A | 389 | 64.31 | $25,016.6 | |
| 2026-01-01 | Yuen Nicole | Director | A | 389 | 64.31 | $25,016.6 | |
| 2026-01-01 | Repetto Richard H | Director | A | 389 | 64.31 | $25,016.6 | |
| 2025-12-31 | Brody Paul Jonathan | Chief Financial Officer | A | 53,452 | 0.00 | $0 | |
| 2025-12-31 | Brody Paul Jonathan | Chief Financial Officer | A | 389 | 64.31 | $25,016.6 | |
| 2025-12-31 | Harris Lawrence E | Director | A | 389 | 64.31 | $25,016.6 | |
| 2025-12-31 | Bright Jill | Director | A | 389 | 64.31 | $25,016.6 | |
| 2025-12-31 | Repetto Richard H | Director | A | 389 | 64.31 | $25,016.6 | |
| 2025-12-31 | Galik Milan | Chief Executive Officer | A | 224,650 | 0.00 | $0 |
Codes are the SEC's: P open-market purchase, S open-market sale; M exercise, F tax withholding, A grant and G gift are routine. A 10b5-1 flag means the trade ran under a plan adopted in advance. Method notes in where the numbers come from.