SEC Form 4 · Updated Daily

IBKR

— INTERACTIVE BROKERS GROUP, INC. Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

Financials Ownership

Current Reporting Owners

Owner	Role	Shares Owned	As Of	Last Activity
Galik Milan	Director · Officer	3,215,389	2026-05-08	F
Brody Paul Jonathan	Director · Officer	2,856,806	2026-05-08	F
Nemser Earl H	Director · Officer	803,568	2026-07-31	A
Frank Thomas AJ	Officer	251,518	2026-05-08	F
Harris Lawrence E	Director	173,482	2026-04-28	S
Mendonca Denis	Officer	145,071	2026-05-08	F
Bright Jill	Director	11,082	2026-01-01	A
Peterffy William	Director	10,126	2026-01-01	A
Yuen Nicole	Director	10,126	2026-01-01	A
Repetto Richard H	Director	3,046	2026-01-01	A
Conkling Lori A	Director	2,559	2026-09-01	P

Recent Filings

Date	Owner	Activity	Shares	Price	Owned After
2026-09-01	Conkling Lori A	Open-market buy	25	$94.53	2,559
2026-08-03	Conkling Lori A	Open-market buy	25	$87.03	2,534
2026-07-31	Nemser Earl H	Grant / award	803,568	$87.99	803,568
2026-07-01	Conkling Lori A	Open-market buy	25	$88.03	2,509
2026-06-01	Conkling Lori A	Open-market buy	25	$86.10	2,484
2026-05-08	Nemser Earl H	Tax withholding	22,486	$84.42	429,344
2026-05-08	Frank Thomas AJ	Tax withholding	31,730	$84.42	251,518
2026-05-08	Galik Milan	Tax withholding	255,039	$84.42	3,215,389
2026-05-08	Mendonca Denis	Tax withholding	11,157	$84.42	145,071
2026-05-08	Brody Paul Jonathan	Tax withholding	82,920	$84.42	2,856,806
2026-05-01	Conkling Lori A	Open-market buy	25	$79.64	2,459
2026-04-28	Harris Lawrence E	Open-market sale	26,000	$76.93	173,482
2026-04-01	Conkling Lori A	Open-market buy	25	$68.38	2,434
2026-03-02	Conkling Lori A	Open-market buy	25	$69.21	2,409
2026-02-25	Conkling Lori A	Open-market buy	50	$73.21	2,384
2026-01-27	Nemser Earl H	Open-market sale	20,469	$75.75	0
2026-01-27	Nemser Earl H	Open-market sale	39,731	$75.07	20,469
2026-01-26	Nemser Earl H	Open-market sale	3,101	$77.98	60,200
2026-01-26	Nemser Earl H	Open-market sale	30,817	$76.72	63,301
2026-01-26	Nemser Earl H	Open-market sale	60,882	$75.83	94,118
2026-01-23	Nemser Earl H	Open-market sale	60,065	$78.14	155,000
2026-01-23	Nemser Earl H	Open-market sale	84,935	$77.65	215,065
2026-01-22	Nemser Earl H	Open-market sale	100,000	$76.81	300,000
2026-01-01	Repetto Richard H	Grant / award	389	$64.31	3,046
2026-01-01	Yuen Nicole	Grant / award	389	$64.31	10,126
2026-01-01	Bright Jill	Grant / award	389	$64.31	11,082
2026-01-01	Conkling Lori A	Grant / award	389	$64.31	2,334
2026-01-01	Harris Lawrence E	Grant / award	389	$64.31	199,482
2026-01-01	Galik Milan	Grant / award	389	$64.31	3,470,428
2026-01-01	Brody Paul Jonathan	Grant / award	389	$64.31	2,939,726
2026-01-01	Nemser Earl H	Grant / award	389	$64.31	451,830
2026-01-01	Peterffy William	Grant / award	389	$64.31	10,126
2025-12-31	Yuen Nicole	Grant / award	389	$64.31	9,737
2025-12-31	Peterffy William	Grant / award	389	$64.31	9,737
2025-12-31	Mendonca Denis	Grant / award	11,156	$0.00	156,228
2025-12-31	Conkling Lori A	Grant / award	389	$64.31	1,556
2025-12-31	Conkling Lori A	Grant / award	1,167	$0.00	1,167
2025-12-31	Nemser Earl H	Grant / award	389	$64.31	451,441
2025-12-31	Nemser Earl H	Grant / award	23,240	$0.00	451,052
2025-12-31	Frank Thomas AJ	Grant / award	13,944	$0.00	283,248

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.