Interactive Brokers Group, Inc. (IBKR) Insider Ownership

Historic Insider Ownership Trends

Interactive Brokers's top three insider shareholders as of April 22, 2026 are Milan Galik (Chief Executive Officer, 3.47Mn shares), Paul Jonathan Brody (Chief Financial Officer, 2.94Mn shares), Thomas Peterffy (Chairman, 1.69Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Milan Galik Chief Executive Officer 3,470,428 0 26 Jan, 2026
Paul Jonathan Brody Chief Financial Officer 2,939,726 0 26 Jan, 2026
Thomas Peterffy Chairman 1,692,901 0 25 Apr, 2024
Thomas Peterffy Chairman 1,516,182 0 24 Feb, 2025
Earl H Nemser Vice Chairman 451,830 0 26 Jan, 2026
Thomas Aj Frank Executive Vice President 283,248 0 07 Jan, 2026
Lawrence E Harris - 199,482 0 26 Jan, 2026
Denis Mendonca Chief Accounting Officer 156,228 0 07 Jan, 2026
Earl H Nemser Vice Chairman 0 100,000 29 Jul, 2024
Jill Bright - 11,082 0 26 Jan, 2026
William Peterffy - 10,126 0 26 Jan, 2026
Nicole Yuen - 10,126 0 26 Jan, 2026
Paul Jonathan Brody Chief Financial Officer 0 6,928 01 Oct, 2025
Philip Uhde - 2,572 0 09 Jan, 2024
Lori A Conkling - 2,434 0 02 Apr, 2026
John M. Damgard - 2,188 0 06 Jan, 2022
Gary Katz - 1,928 0 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
01 Apr, 2026 Lori A Conkling Class A common stock A 25 $68.38 2,434 D P
25 Feb, 2026 Lori A Conkling Class A common stock A 50 $73.21 2,384 D P
02 Mar, 2026 Lori A Conkling Class A common stock A 25 $69.21 2,409 D P
26 Jan, 2026 Earl H Nemser Class A common stock D 60,882 $75.83 94,118 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 3,101 $77.98 60,200 I S
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
01 Jan, 2026 Earl H Nemser Class A common stock A 389 $64.31 451,830 D A
22 Jan, 2026 Earl H Nemser Class A common stock D 100,000 $76.81 300,000 I S
01 Jan, 2026 Lawrence E Harris Class A common stock A 389 $64.31 199,482 D A
01 Jan, 2026 Nicole Yuen Class A common stock A 389 $64.31 10,126 D A
01 Jan, 2026 Paul Jonathan Brody Class A common stock A 389 $64.31 2,939,726 D A
01 Jan, 2026 Jill Bright Class A common stock A 389 $64.31 11,082 D A
01 Jan, 2026 Milan Galik Class A common stock A 389 $64.31 3,470,428 D A
01 Jan, 2026 William Peterffy Class A common stock A 389 $64.31 10,126 D A
31 Dec, 2025 Lori A Conkling Class A common stock A 389 $0.00 1,945 D A
23 Jan, 2026 Earl H Nemser Class A common stock D 84,935 $77.65 215,065 I S
01 Jan, 2026 Lori A Conkling Class A common stock A 389 $64.31 2,334 D A
23 Jan, 2026 Earl H Nemser Class A common stock D 60,065 $78.14 155,000 I S