The Filings Report

Interactive Brokers Group, Inc. Class A Common Stock insider trading

IBKRfinancial statementsForm 4 filings on EDGAR151 transactions since Nov 1, 2024

From August 4, 2026 to November 1, 2026, 1 insider at Interactive Brokers Group, Inc. Class A Common Stock bought $4K of stock in the open market, and 1 sold $2M. Officers and directors accounted for $4K of purchases and $2M of sales. The last reported transaction was an open-market sale by Harris Lawrence E on October 28, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through October 29, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

IBKR daily priceSplit-adjusted prices in US dollars

Bought $4KSold $2MAug 4, 2026 – Nov 1, 2026

Oct 30, 2026O $78.89 · H $78.90 · L $75.42 · C $76.90Bought $0 (0)Sold $0 (0)
$74$81$87$94$1002026-08-04: open $88.69, high $89.48, low $86.92, close $88.632026-08-05: open $89.59, high $90.92, low $88.67, close $88.742026-08-06: open $88.14, high $89.14, low $85.69, close $86.022026-08-07: open $86.57, high $87.97, low $85.37, close $87.832026-08-10: open $88.00, high $91.78, low $88.00, close $90.662026-08-11: open $91.12, high $91.65, low $89.52, close $89.782026-08-12: open $91.15, high $92.76, low $90.84, close $91.662026-08-13: open $92.00, high $92.72, low $91.34, close $91.422026-08-14: open $91.41, high $92.42, low $90.12, close $92.062026-08-17: open $92.23, high $94.60, low $91.59, close $94.332026-08-18: open $93.00, high $93.23, low $90.42, close $90.562026-08-19: open $90.99, high $91.43, low $88.92, close $90.542026-08-20: open $91.41, high $91.65, low $89.67, close $89.852026-08-21: open $90.80, high $94.22, low $90.31, close $93.872026-08-24: open $93.86, high $94.78, low $92.58, close $93.052026-08-25: open $93.55, high $98.75, low $92.80, close $98.192026-08-26: open $97.63, high $97.78, low $94.81, close $97.022026-08-27: open $96.88, high $97.34, low $95.76, close $96.552026-08-28: open $96.61, high $97.72, low $95.46, close $95.842026-08-31: open $95.50, high $97.89, low $94.43, close $97.292026-09-01: open $94.63, high $94.90, low $90.03, close $90.392026-09-02: open $90.00, high $91.35, low $88.53, close $89.122026-09-03: open $89.83, high $93.27, low $89.77, close $92.952026-09-04: open $91.55, high $92.85, low $91.14, close $92.622026-09-08: open $91.76, high $93.29, low $90.87, close $90.972026-09-09: open $90.99, high $91.86, low $90.25, close $90.282026-09-10: open $89.06, high $90.24, low $88.74, close $89.422026-09-11: open $90.71, high $92.31, low $89.45, close $91.372026-09-14: open $90.00, high $90.94, low $89.08, close $90.752026-09-15: open $90.20, high $90.48, low $87.50, close $88.802026-09-16: open $88.99, high $89.09, low $84.96, close $86.742026-09-17: open $88.72, high $89.09, low $87.63, close $88.382026-09-18: open $89.91, high $91.06, low $88.75, close $90.692026-09-21: open $92.50, high $93.94, low $91.58, close $93.212026-09-22: open $92.85, high $93.20, low $89.71, close $91.882026-09-23: open $91.36, high $93.53, low $90.92, close $91.562026-09-24: open $90.53, high $91.19, low $89.10, close $89.822026-09-25: open $90.00, high $90.57, low $88.53, close $89.242026-09-28: open $87.80, high $88.50, low $86.81, close $87.082026-09-29: open $87.86, high $87.86, low $85.89, close $86.182026-09-30: open $86.63, high $86.93, low $85.39, close $85.422026-10-01: open $85.42, high $87.25, low $83.60, close $85.812026-10-02: open $86.55, high $88.92, low $86.55, close $88.302026-10-05: open $88.87, high $89.56, low $88.09, close $89.052026-10-06: open $89.38, high $91.85, low $89.06, close $90.582026-10-07: open $88.70, high $89.11, low $85.97, close $87.742026-10-08: open $87.11, high $87.79, low $86.28, close $86.472026-10-09: open $87.05, high $88.28, low $86.47, close $87.872026-10-12: open $88.22, high $89.11, low $87.72, close $87.892026-10-13: open $87.70, high $88.02, low $86.09, close $87.492026-10-14: open $86.02, high $86.84, low $83.62, close $84.142026-10-15: open $82.75, high $86.22, low $81.04, close $86.032026-10-16: open $86.26, high $86.95, low $82.25, close $82.692026-10-19: open $82.83, high $83.36, low $80.82, close $81.352026-10-20: open $80.50, high $83.28, low $80.50, close $82.912026-10-21: open $84.43, high $86.18, low $83.30, close $85.332026-10-22: open $83.24, high $85.08, low $81.71, close $82.282026-10-23: open $81.56, high $82.14, low $80.14, close $80.282026-10-26: open $80.35, high $81.92, low $79.30, close $80.592026-10-27: open $81.60, high $82.93, low $81.40, close $82.252026-10-28: open $82.60, high $83.70, low $81.68, close $83.542026-10-29: open $83.53, high $83.78, low $80.96, close $81.772026-10-30: open $78.89, high $78.90, low $75.42, close $76.90Insider purchases / sales · USD$5M$0−$5M2026-09-01: 1 purchases ($2K), 0 sales ($0)2026-10-01: 1 purchases ($2K), 0 sales ($0)2026-10-28: 0 purchases ($0), 1 sales ($2M)Aug 4Aug 26Sep 17Oct 9Oct 30

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Oct 30, 2026. Insider data through Nov 1, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

151 transactions from November 1, 2024 to November 1, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Oct 28, 2026Harris Lawrence EDirectoropen-market sale25,000$82.61$2M148,482Oct 29, 2026
Oct 1, 2026Conkling Lori ADirectoropen-market buy10b5-125$85.42$2K2,584Oct 5, 2026
Sep 1, 2026Conkling Lori ADirectoropen-market buy10b5-125$94.53$2K2,559Sep 2, 2026
Aug 3, 2026Conkling Lori ADirectoropen-market buy10b5-125$87.03$2K2,534Aug 4, 2026
Jul 31, 2026Nemser Earl HVice Chairman, Directorawardindirect803,568$87.99$71M803,568Aug 4, 2026
Jul 1, 2026Conkling Lori ADirectoropen-market buy10b5-125$88.03$2K2,509Jul 1, 2026
Jun 1, 2026Conkling Lori ADirectoropen-market buy10b5-125$86.10$2K2,484Jun 2, 2026
May 8, 2026Brody Paul JonathanChief Financial Officer, Directortax withholding82,920$84.42$7M3MMay 28, 2026
May 8, 2026Mendonca DenisChief Accounting Officertax withholding11,157$84.42$942K145,071May 28, 2026
May 8, 2026Galik MilanChief Executive Officer, Directortax withholding255,039$84.42$22M3MMay 28, 2026
May 8, 2026Frank Thomas AJExecutive Vice Presidenttax withholding31,730$84.42$3M251,518May 28, 2026
May 8, 2026Nemser Earl HVice Chairman, Directortax withholding22,486$84.42$2M429,344May 28, 2026
May 1, 2026Conkling Lori ADirectoropen-market buy10b5-125$79.64$2K2,459May 4, 2026
Apr 28, 2026Harris Lawrence EDirectoropen-market sale26,000$76.93$2M173,482Apr 29, 2026
Apr 1, 2026Conkling Lori ADirectoropen-market buy10b5-125$68.38$2K2,434Apr 2, 2026
Mar 2, 2026Conkling Lori ADirectoropen-market buy10b5-125$69.21$2K2,409Mar 26, 2026
Feb 25, 2026Conkling Lori ADirectoropen-market buy10b5-150$73.21$4K2,384Mar 26, 2026
Jan 27, 2026Nemser Earl HVice Chairman, Directoropen-market saleindirect39,731$75.07$3M20,469Jan 28, 2026
Jan 27, 2026Nemser Earl HVice Chairman, Directoropen-market saleindirect20,469$75.75$2M0Jan 28, 2026
Jan 26, 2026Nemser Earl HVice Chairman, Directoropen-market saleindirect60,882$75.83$5M94,118Jan 28, 2026
Jan 26, 2026Nemser Earl HVice Chairman, Directoropen-market saleindirect30,817$76.72$2M63,301Jan 28, 2026
Jan 26, 2026Nemser Earl HVice Chairman, Directoropen-market saleindirect3,101$77.98$242K60,200Jan 28, 2026
Jan 23, 2026Nemser Earl HVice Chairman, Directoropen-market saleindirect60,065$78.14$5M155,000Jan 26, 2026
Jan 23, 2026Nemser Earl HVice Chairman, Directoropen-market saleindirect84,935$77.65$7M215,065Jan 26, 2026
Jan 22, 2026Nemser Earl HVice Chairman, Directoropen-market saleindirect100,000$76.81$8M300,000Jan 26, 2026
Jan 1, 2026Peterffy WilliamDirectoraward389$64.31$25K10,126Jan 26, 2026
Jan 1, 2026Nemser Earl HVice Chairman, Directoraward389$64.31$25K451,830Jan 26, 2026
Jan 1, 2026Brody Paul JonathanChief Financial Officer, Directoraward389$64.31$25K3MJan 26, 2026
Jan 1, 2026Galik MilanChief Executive Officer, Directoraward389$64.31$25K3MJan 26, 2026
Jan 1, 2026Harris Lawrence EDirectoraward389$64.31$25K199,482Jan 26, 2026
Jan 1, 2026Conkling Lori ADirectoraward389$64.31$25K2,334Jan 26, 2026
Jan 1, 2026Bright JillDirectoraward389$64.31$25K11,082Jan 26, 2026
Jan 1, 2026Yuen NicoleDirectoraward389$64.31$25K10,126Jan 26, 2026
Jan 1, 2026Repetto Richard HDirectoraward389$64.31$25K3,046Jan 26, 2026
Dec 31, 2025Conkling Lori ADirectoraward389$0.00—1,945Jan 26, 2026
Dec 31, 2025Brody Paul JonathanChief Financial Officer, Directoraward53,452$0.00—3MJan 7, 2026
Dec 31, 2025Brody Paul JonathanChief Financial Officer, Directoraward389$64.31$25K3MJan 7, 2026
Dec 31, 2025Repetto Richard HDirectoraward389$64.31$25K2,657Jan 7, 2026
Dec 31, 2025Nemser Earl HVice Chairman, Directoraward389$64.31$25K451,441Jan 7, 2026
Dec 31, 2025Nemser Earl HVice Chairman, Directoraward23,240$0.00—451,052Jan 7, 2026
Dec 31, 2025Mendonca DenisChief Accounting Officeraward11,156$0.00—156,228Jan 7, 2026
Dec 31, 2025Yuen NicoleDirectoraward389$64.31$25K9,737Jan 7, 2026
Dec 31, 2025Harris Lawrence EDirectoraward389$64.31$25K199,093Jan 7, 2026
Dec 31, 2025Bright JillDirectoraward389$64.31$25K10,693Jan 7, 2026
Dec 31, 2025Galik MilanChief Executive Officer, Directoraward389$64.31$25K3MJan 7, 2026
Dec 31, 2025Galik MilanChief Executive Officer, Directoraward224,650$0.00—3MJan 7, 2026
Dec 31, 2025Conkling Lori ADirectoraward389$64.31$25K1,556Jan 7, 2026
Dec 31, 2025Conkling Lori ADirectoraward1,167$0.00—1,167Jan 7, 2026
Dec 31, 2025Frank Thomas AJExecutive Vice Presidentaward13,944$0.00—283,248Jan 7, 2026
Dec 31, 2025Peterffy WilliamDirectoraward389$64.31$25K9,737Jan 7, 2026

Who the insiders are

Everyone who reported a transaction since November 1, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Nemser Earl HVice Chairman, DirectorJul 31, 2026award429,344—$31M (8)0 of 8
Harris Lawrence EDirectorOct 28, 2026open-market sale148,482—$4M (2)0 of 2
Conkling Lori ADirectorOct 1, 2026open-market buy2,584$20K (9)——
Brody Paul JonathanChief Financial Officer, DirectorMay 8, 2026tax withholding3M———
Galik MilanChief Executive Officer, DirectorMay 8, 2026tax withholding3M———
Bright JillDirectorJan 1, 2026award11,082———
Mendonca DenisChief Accounting OfficerMay 8, 2026tax withholding145,071———
Frank Thomas AJExecutive Vice PresidentMay 8, 2026tax withholding251,518———
Repetto Richard HDirectorJan 1, 2026award3,046———
Peterffy WilliamDirectorJan 1, 2026award10,126———
Yuen NicoleDirectorJan 1, 2026award10,126———
Peterffy ThomasChairman, DirectorFeb 20, 2025gift2M———

Questions

Are Interactive Brokers Group, Inc. Class A Common Stock insiders buying or selling?

Over the twelve months to November 1, 2026, 2 insiders at Interactive Brokers Group, Inc. Class A Common Stock sold $35M of stock in the open market, all by officers and directors, and 1 insider bought $20K, all by officers and directors. Net, insiders sold $35M. Only open-market purchases and sales are counted.

Who sold the most Interactive Brokers Group, Inc. Class A Common Stock stock in the last year?

Nemser Earl H (Vice Chairman, Director) sold $31M in 8 open-market sales over the twelve months to November 1, 2026.

Do Interactive Brokers Group, Inc. Class A Common Stock executives sell under 10b5-1 plans?

0 of the 10 open-market sales in the last twelve months (0%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on Interactive Brokers Group, Inc. Class A Common Stock

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.