Interactive Brokers Group Inc. (IBKR) Insider Trading

Last 12 months

Insiders bought $46k and sold $36.5M on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. Vice Chairman Earl H Nemser sold $19M on Jan 23, 29% of their stake, outside a plan.

Net open-market

−$36.4M

9 buys · 6 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

2 / 2

executives and directors

Last open-market buy

Oct 2026

Oct 1, 2026

Get an email when IBKR's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 1	Lori A Conkling Director	Bought	25	$85.42	$2k	1.0%	Form 4
Sep 1	Lori A Conkling Director	Bought	25	$94.53	$2k	1.0%	Form 4
Aug 3	Lori A Conkling Director	Bought	25	$87.03	$2k	1.0%	Form 4
Jul 1	Lori A Conkling Director	Bought	25	$88.03	$2k	1.0%	Form 4
Jun 1	Lori A Conkling Director	Bought	25	$86.10	$2k	1.0%	Form 4
May 1	Lori A Conkling Director	Bought	25	$79.64	$2k	1.0%	Form 4
Apr 28	Lawrence E Harris Director	SoldNo plan	26,000	$76.93	$2M	13%	Form 4
Apr 1	Lori A Conkling Director	Bought	25	$68.38	$2k	1.0%	Form 4
Feb 25 – Mar 2	Lori A Conkling Director	Bought 2 parts	75	$71.88 average	$5k	3.2%	Form 4
Jan 26 – 27	Earl H Nemser Vice Chairman	SoldNo plan 5 parts	155,000	$75.84 average	$11.8M	26%	Form 4
Jan 22 – 23	Earl H Nemser Vice Chairman	SoldNo plan 3 parts	245,000	$77.43 average	$19M	29%	Form 4
Oct 29, 2025	Lawrence E Harris Director	SoldNo plan	10,645	$69.00	$735k	5.1%	Form 4
Oct 27, 2025 – Oct 28, 2025	Lawrence E Harris Director	SoldNo plan 2 parts	14,355	$69.45 average	$997k	6.4%	Form 4
Oct 23, 2025 – Oct 24, 2025	Lawrence E Harris Director	SoldNo plan 2 parts	30,000	$67.86 average	$2.04M	12%	Form 4
Oct 23, 2025	Jill Bright Director	Bought	400	$65.95	$26k	4.0%	Form 4
Sep 29, 2025 – Sep 30, 2025	Paul Jonathan Brody Chief Financial Officer	Sold10b5-1 plan 5 parts	21,361	$68.11 average	$1.45M	0.7%	Form 4
Sep 25, 2025 – Sep 26, 2025	Paul Jonathan Brody Chief Financial Officer	Sold10b5-1 plan 5 parts	31,354	$65.34 average	$2.05M	1.1%	Form 4
Sep 23, 2025 – Sep 24, 2025	Paul Jonathan Brody Chief Financial Officer	Sold10b5-1 plan 4 parts	33,416	$65.09 average	$2.17M	1.1%	Form 4
Sep 19, 2025	Paul Jonathan Brody Chief Financial Officer	Sold10b5-1 plan	6,928	$64.66	$448k	0.2%	Form 4
Sep 17, 2025 – Sep 18, 2025	Paul Jonathan Brody Chief Financial Officer	Sold10b5-1 plan 5 parts	223,382	$63.54 average	$14.2M	6.8%	Form 4
Sep 15, 2025 – Sep 16, 2025	Paul Jonathan Brody Chief Financial Officer	Sold10b5-1 plan 5 parts	195,482	$62.68 average	$12.3M	5.6%	Form 4
Sep 11, 2025 – Sep 12, 2025	Paul Jonathan Brody Chief Financial Officer	Sold10b5-1 plan 4 parts	209,783	$63.62 average	$13.3M	5.7%	Form 4
Sep 9, 2025 – Sep 10, 2025	Paul Jonathan Brody Chief Financial Officer	Sold10b5-1 plan 3 parts	212,399	$62.19 average	$13.2M	5.5%	Form 4
Aug 14, 2025	Earl H Nemser Vice Chairman	Sold10b5-1 plan 2 parts	53,900	$64.00 average	$3.45M	6.1%	Form 4
Aug 12, 2025 – Aug 13, 2025	Earl H Nemser Vice Chairman	Sold10b5-1 plan 7 parts	201,686	$67.39 average	$13.6M	19%	Form 4
Aug 8, 2025 – Aug 11, 2025	Earl H Nemser Vice Chairman	Sold10b5-1 plan 3 parts	25,682	$65.88 average	$1.69M	2.3%	Form 4
Aug 6, 2025 – Aug 7, 2025	Earl H Nemser Vice Chairman	Sold10b5-1 plan 4 parts	25,682	$63.72 average	$1.64M	2.3%	Form 4
Aug 4, 2025 – Aug 5, 2025	Earl H Nemser Vice Chairman	Sold10b5-1 plan 3 parts	25,682	$64.17 average	$1.65M	2.2%	Form 4
Jul 31, 2025 – Aug 1, 2025	Earl H Nemser Vice Chairman	Sold10b5-1 plan 6 parts	27,482	$65.28 average	$1.79M	2.3%	Form 4
Jul 30, 2025	Earl H Nemser Vice Chairman	Sold10b5-1 plan 2 parts	39,786	$66.38 average	$2.64M	4.8%	Form 4
Jul 28, 2025	Earl H Nemser Vice Chairman	SoldNo plan	100	$65.90	$7k	<0.1%	Form 4
Jan 31, 2025	Jill Bright Director	Bought	135	$219.51	$30k	5.8%	Form 4

Oct 1
Lori A Conkling
Director · bought 25 at $85.42
$2k
1.0% of stake
Sep 1
Lori A Conkling
Director · bought 25 at $94.53
$2k
1.0% of stake
Aug 3
Lori A Conkling
Director · bought 25 at $87.03
$2k
1.0% of stake
Jul 1
Lori A Conkling
Director · bought 25 at $88.03
$2k
1.0% of stake
Jun 1
Lori A Conkling
Director · bought 25 at $86.10
$2k
1.0% of stake
May 1
Lori A Conkling
Director · bought 25 at $79.64
$2k
1.0% of stake
Apr 28No plan
Lawrence E Harris
Director · sold 26,000 at $76.93
$2M
13% of stake
Apr 1
Lori A Conkling
Director · bought 25 at $68.38
$2k
1.0% of stake
Feb 25 – Mar 2
Lori A Conkling
Director · bought 75 at avg $71.88
$5k
3.2% of stake
Jan 26 – 27No plan
Earl H Nemser
Vice Chairman · sold 155,000 at avg $75.84
$11.8M
26% of stake
Jan 22 – 23No plan
Earl H Nemser
Vice Chairman · sold 245,000 at avg $77.43
$19M
29% of stake
Oct 29, 2025No plan
Lawrence E Harris
Director · sold 10,645 at $69.00
$735k
5.1% of stake
Oct 27, 2025 – Oct 28, 2025No plan
Lawrence E Harris
Director · sold 14,355 at avg $69.45
$997k
6.4% of stake
Oct 23, 2025 – Oct 24, 2025No plan
Lawrence E Harris
Director · sold 30,000 at avg $67.86
$2.04M
12% of stake
Oct 23, 2025
Jill Bright
Director · bought 400 at $65.95
$26k
4.0% of stake
Sep 29, 2025 – Sep 30, 202510b5-1 plan
Paul Jonathan Brody
Chief Financial Officer · sold 21,361 at avg $68.11
$1.45M
0.7% of stake
Sep 25, 2025 – Sep 26, 202510b5-1 plan
Paul Jonathan Brody
Chief Financial Officer · sold 31,354 at avg $65.34
$2.05M
1.1% of stake
Sep 23, 2025 – Sep 24, 202510b5-1 plan
Paul Jonathan Brody
Chief Financial Officer · sold 33,416 at avg $65.09
$2.17M
1.1% of stake
Sep 19, 202510b5-1 plan
Paul Jonathan Brody
Chief Financial Officer · sold 6,928 at $64.66
$448k
0.2% of stake
Sep 17, 2025 – Sep 18, 202510b5-1 plan
Paul Jonathan Brody
Chief Financial Officer · sold 223,382 at avg $63.54
$14.2M
6.8% of stake
Sep 15, 2025 – Sep 16, 202510b5-1 plan
Paul Jonathan Brody
Chief Financial Officer · sold 195,482 at avg $62.68
$12.3M
5.6% of stake
Sep 11, 2025 – Sep 12, 202510b5-1 plan
Paul Jonathan Brody
Chief Financial Officer · sold 209,783 at avg $63.62
$13.3M
5.7% of stake
Sep 9, 2025 – Sep 10, 202510b5-1 plan
Paul Jonathan Brody
Chief Financial Officer · sold 212,399 at avg $62.19
$13.2M
5.5% of stake
Aug 14, 202510b5-1 plan
Earl H Nemser
Vice Chairman · sold 53,900 at avg $64.00
$3.45M
6.1% of stake
Aug 12, 2025 – Aug 13, 202510b5-1 plan
Earl H Nemser
Vice Chairman · sold 201,686 at avg $67.39
$13.6M
19% of stake
Aug 8, 2025 – Aug 11, 202510b5-1 plan
Earl H Nemser
Vice Chairman · sold 25,682 at avg $65.88
$1.69M
2.3% of stake
Aug 6, 2025 – Aug 7, 202510b5-1 plan
Earl H Nemser
Vice Chairman · sold 25,682 at avg $63.72
$1.64M
2.3% of stake
Aug 4, 2025 – Aug 5, 202510b5-1 plan
Earl H Nemser
Vice Chairman · sold 25,682 at avg $64.17
$1.65M
2.2% of stake
Jul 31, 2025 – Aug 1, 202510b5-1 plan
Earl H Nemser
Vice Chairman · sold 27,482 at avg $65.28
$1.79M
2.3% of stake
Jul 30, 202510b5-1 plan
Earl H Nemser
Vice Chairman · sold 39,786 at avg $66.38
$2.64M
4.8% of stake
Jul 28, 2025No plan
Earl H Nemser
Vice Chairman · sold 100 at $65.90
$7k
<0.1% of stake
Jan 31, 2025
Jill Bright
Director · bought 135 at $219.51
$30k
5.8% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch IBKR, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in IBKR's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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