Interactive Brokers Group, Inc. (IBKR) has 15 known insider and institutional holders on record. The largest holder is Galik Milan with 3,470,428 shares. Other notable holders include Brody Paul Jonathan and Peterffy Thomas.
Over the last 12 months, insiders have made 69 transactions in IBKR stock — 25 buys (valued at $383.71K) and 36 sells (valued at $53.01M). Insider selling has exceeded buying during this period.
IBKR Insider Ownership
Top Holder
Galik Milan
3,470,428 shares
Buys (12 mo)
25
$383.71K value
Sells (12 mo)
36
$53.01M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Galik Milan |
Chief Executive Officer |
3,470,428 |
2026-01-26 |
|
| 2 |
Brody Paul Jonathan |
Chief Financial Officer |
2,939,726 |
2026-01-26 |
|
| 3 |
Peterffy Thomas |
Chairman |
1,516,182 |
2025-02-24 |
|
| 4 |
Frank Thomas Aj |
Executive Vice President |
283,248 |
2026-01-07 |
|
| 5 |
Harris Lawrence E |
Director |
199,482 |
2026-01-26 |
|
| 6 |
Mendonca Denis |
Chief Accounting Officer |
156,228 |
2026-01-07 |
|
| 7 |
Nemser Earl H |
Vice Chairman |
60,200 |
2026-01-28 |
|
| 8 |
Bright Jill |
Director |
11,082 |
2026-01-26 |
|
| 9 |
Yuen Nicole |
Director |
10,126 |
2026-01-26 |
|
| 10 |
Peterffy William |
Director |
10,126 |
2026-01-26 |
|
| 11 |
Repetto Richard H |
Director |
3,046 |
2026-01-26 |
|
| 12 |
Uhde Philip |
Director |
2,572 |
2024-01-09 |
|
| 13 |
Conkling Lori A |
Director |
2,434 |
2026-04-02 |
|
| 14 |
Damgard John M. |
Director |
2,188 |
2022-01-06 |
|
| 15 |
Katz Gary |
Director |
1,928 |
2023-01-06 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-01 |
Conkling Lori A |
Director |
Informative Buy |
25 |
$68.38 |
$1.71K |
| 2026-03-02 |
Conkling Lori A |
Director |
Informative Buy |
25 |
$69.21 |
$1.73K |
| 2026-02-25 |
Conkling Lori A |
Director |
Informative Buy |
50 |
$73.21 |
$3.66K |
| 2026-01-27 |
Nemser Earl H |
Vice Chairman |
Informative Sell |
20,469 |
$75.75 |
$1.55M |
| 2026-01-26 |
Nemser Earl H |
Vice Chairman |
Informative Sell |
3,101 |
$77.98 |
$241.82K |
| 2026-01-01 |
Conkling Lori A |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2025-12-31 |
Conkling Lori A |
Director |
RSU Award |
389 |
- |
- |
| 2026-01-01 |
Repetto Richard H |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2026-01-01 |
Yuen Nicole |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2026-01-01 |
Peterffy William |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2026-01-01 |
Bright Jill |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2026-01-01 |
Harris Lawrence E |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2026-01-01 |
Galik Milan |
Chief Executive Officer |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2026-01-01 |
Brody Paul Jonathan |
Chief Financial Officer |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2026-01-23 |
Nemser Earl H |
Vice Chairman |
Informative Sell |
60,065 |
$78.14 |
$4.69M |
| 2026-01-22 |
Nemser Earl H |
Vice Chairman |
Informative Sell |
100,000 |
$76.81 |
$7.68M |
| 2026-01-01 |
Nemser Earl H |
Vice Chairman |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2025-12-31 |
Conkling Lori A |
Director |
RSU Award |
1,167 |
- |
- |
| 2025-12-31 |
Repetto Richard H |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2025-12-31 |
Yuen Nicole |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2025-12-31 |
Peterffy William |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2025-12-31 |
Bright Jill |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2025-12-31 |
Mendonca Denis |
Chief Accounting Officer |
RSU Award |
11,156 |
- |
- |
| 2025-12-31 |
Harris Lawrence E |
Director |
RSU Award |
389 |
$64.31 |
$25.02K |
| 2025-12-31 |
Galik Milan |
Chief Executive Officer |
RSU Award |
224,650 |
- |
- |
