Interactive Brokers Group, Inc.

IBKRCIK 0001381197 · Every Form 4 filed by insiders at this issuer. See financials →

Annual report (10-K)

Latest 10-K/A filed Mar 31, 2026. Sentiment + YoY language diff vs prior year. Read sections →

Signal:Material rewriteFull-doc fallback

Full filing:tone -0.0099Δ-0.000710% similar+12/-1706 ¶

Sentiment via Loughran-McDonald lexicon · YoY diff via Jaccard similarity + paragraph set difference.

Recent 8-K announcements

Per-item disclosure feed. Item 2.02 is the earnings release.

Apr 29, 2026no items parsed Apr 21, 2026no items parsed Jan 20, 2026no items parsed Oct 16, 2025no items parsed Jul 30, 2025no items parsed

YoY shift: Neutral

Year-over-year tone shift - average net-tone change across Risk Factors and MD&A vs the prior 10-K. This filing is -0.07pp more bearish than last year's.

Why YoY instead of absolute: the LM lexicon has ~6.6× more negative words than positive (legal/risk-disclosure language is heavy on hedging), so every 10-K reads bearish on raw tone. Year-over-year change strips that bias and surfaces the actual shift in management's framing.

Per-snippet highlights

Sentence-level sentiment highlighting with category and subcategory filters is coming once the snippet-scoring pipeline lands. For now, dig into the actual section text on the Sections tab.

Top insiders

Most active reporters at Interactive Brokers Group, Inc.

Name	Roles	Filings
Peterffy Thomas	OfficerDirector	73
Brody Paul Jonathan	OfficerDirector	45
Frank Thomas Aj	Officer	45
Nemser Earl H	OfficerDirector	34
Galik Milan	OfficerDirector	15

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Top performers

Insiders ranked by realized 90-day signed return on their open-market trades at Interactive Brokers Group, Inc.. Minimum 3 scored trades. Returns are signed - a sale followed by a rally counts against the insider.

#	Insider	Trades	Win rate	Avg	Median	Best	Worst
1	Peterffy Thomas	319	65%	+4.7%	+7.1%	+28.5%	-28.2%
2	Nemser Earl H	51	4%	-11.1%	-11.5%	+2.2%	-28.4%
3	Harris Lawrence E	5	0%	-10.5%	-9.8%	-8.4%	-12.8%
4	Frank Thomas Aj	134	52%	-6.2%	+0.8%	+17.2%	-32.1%
5	Brody Paul Jonathan	122	47%	-1.1%	-0.4%	+12.4%	-17.6%
6	Uhde Philip	4	0%	-0.1%	-0.1%	-0.1%	-0.1%

All filings

269 Form 4 / 4-A filings, newest first

Filed	Insider	Top transaction	Shares	Price	Value
Jun 2, 2026	Conkling Lori A Director	PPurchase	25	$86.10	$2,153
May 28, 2026	Nemser Earl H Vice Chairman · Director	FTax	22,486	$84.42	$1,898,268
May 28, 2026	Frank Thomas Aj Executive Vice President	FTax	31,730	$84.42	$2,678,647
May 28, 2026	Galik Milan Chief Executive Officer · Director	FTax	255,039	$84.42	$21,530,392
May 28, 2026	Mendonca Denis Chief Accounting Officer	FTax	11,157	$84.42	$941,874

Showing 1-5 of 269

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Real-time Form 4 intelligence. Smarter insider tracking.

Filed		Top transaction	Shares	Price	Value