Interactive Brokers Group, Inc. (IBKR) Insider Ownership

Historic Insider Ownership Trends

Through the 90-day period concluding February 07, 2026, Interactive Brokers's top three insider stakeholders include Chairman Thomas Peterffy (6.06Mn shares), Chief Executive Officer Milan Galik (3.47Mn shares), Chief Financial Officer Paul Jonathan Brody (2.95Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Milan Galik Chief Executive Officer 3,470,428 26 Jan, 2026
Paul Jonathan Brody Chief Financial Officer 2,946,654 26 Jan, 2026
Thomas Peterffy Chairman 6,064,728 24 Feb, 2025
Earl H Nemser Vice Chairman 451,830 26 Jan, 2026
Thomas Aj Frank Executive Vice President 283,248 07 Jan, 2026
Lawrence E Harris 199,482 26 Jan, 2026
Denis Mendonca Chief Accounting Officer 156,228 07 Jan, 2026
Jill Bright 11,082 26 Jan, 2026
William Peterffy 10,126 26 Jan, 2026
Nicole Yuen 10,126 26 Jan, 2026
Richard H Repetto 3,046 26 Jan, 2026
Philip Uhde 10,288 09 Jan, 2024
Lori A Conkling 2,334 26 Jan, 2026
John M. Damgard 8,752 06 Jan, 2022
Gary Katz 7,712 06 Jan, 2023

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
27 Jan, 2026 Earl H Nemser Class A common stock D 39,731 $75.07 20,469 I S
27 Jan, 2026 Earl H Nemser Class A common stock D 20,469 $75.75 0 I S
26 Jan, 2026 Earl H Nemser Class A common stock D 3,101 $77.98 60,200 I S
26 Jan, 2026 Earl H Nemser Class A common stock D 30,817 $76.72 63,301 I S
26 Jan, 2026 Earl H Nemser Class A common stock D 60,882 $75.83 94,118 I S
23 Jan, 2026 Earl H Nemser Class A common stock D 60,065 $78.14 155,000 I S
23 Jan, 2026 Earl H Nemser Class A common stock D 84,935 $77.65 215,065 I S
22 Jan, 2026 Earl H Nemser Class A common stock D 100,000 $76.81 300,000 I S
01 Jan, 2026 Earl H Nemser Class A common stock A 389 $64.31 451,830 D A
01 Jan, 2026 Paul Jonathan Brody Class A common stock A 389 $64.31 2,939,726 D A
01 Jan, 2026 Milan Galik Class A common stock A 389 $64.31 3,470,428 D A
01 Jan, 2026 Lawrence E Harris Class A common stock A 389 $64.31 199,482 D A
01 Jan, 2026 Jill Bright Class A common stock A 389 $64.31 11,082 D A
01 Jan, 2026 William Peterffy Class A common stock A 389 $64.31 10,126 D A
01 Jan, 2026 Nicole Yuen Class A common stock A 389 $64.31 10,126 D A
01 Jan, 2026 Richard H Repetto Class A common stock A 389 $64.31 3,046 D A
01 Jan, 2026 Lori A Conkling - - 2,334 D
01 Jan, 2026 Lori A Conkling Class A common stock A 389 $64.31 2,334 D A
31 Dec, 2025 Earl H Nemser Class A common stock A 389 $64.31 451,441 D A
31 Dec, 2025 Earl H Nemser Class A common stock A 23,240 $0.00 451,052 D A