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Interactive Brokers Group, Inc.

IBKR
Exchange
Nasdaq
Industry
Security Brokers, Dealers & Flotation Companies
SEC CIK
0001381197

In the last 90 days, Interactive Brokers Group, Inc. insiders filed 2 open-market purchases and 0 sales; 1,119 institutions reported holding it in 13F filings for Q2 2026, worth $33.7B in total; 3 superinvestors hold it, including Viking Global Investors and Lone Pine Capital.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Interactive Brokers Group, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
2 filings
1 insider, $4.54K in total
Open-market sells
0 filings
Insiders trading
1
Net value
+$4.54K
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Interactive Brokers Group, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Interactive Brokers Group, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Conkling Lori ADirector2,559Sep 2, 20269
Nemser Earl HVice Chairman803,568IndirectAug 4, 20266
Frank Thomas AJExecutive Vice President251,518May 28, 20262
Brody Paul JonathanChief Financial Officer2,856,806May 28, 20265
Galik MilanChief Executive Officer3,215,389May 28, 20264
Mendonca DenisChief Accounting Officer145,071May 28, 20262
Harris Lawrence EDirector173,482Apr 29, 20266
Bright JillDirector11,082Jan 26, 20263
Peterffy WilliamDirector10,126Jan 26, 20262
Yuen NicoleDirector10,126Jan 26, 20262
Repetto Richard HDirector3,046Jan 26, 20262
Peterffy ThomasChairman1,516,182Feb 24, 20250
Uhde PhilipDirector2,572Jan 9, 20240
Katz GaryDirector1,928Jan 6, 20230
Damgard John M.Director2,188Jan 6, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Oct 4, 2023 (view filing)Oct 2-32 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−26.3K$86.60−$2.28M−8.6%281.2K after4 lots10b5-1
Oct 6, 2023 (view filing)Oct 4-52 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−26.3K$86.80−$2.28M−3.5%735.1K after5 lots10b5-1
Oct 6, 2023 (view filing)Oct 4-52 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−26.3K$86.78−$2.28M−9.4%254.9K after5 lots10b5-1
Oct 10, 2023 (view filing)Oct 6-94 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−26.3K$89.10−$2.34M−10.3%228.6K after5 lots10b5-1
Oct 10, 2023 (view filing)Oct 6-94 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−28.2K$89.18−$2.52M−3.8%706.9K after5 lots10b5-1
Oct 12, 2023 (view filing)Oct 10-112 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−26.0K$88.04−$2.29M−3.7%680.9K after4 lots10b5-1
Oct 12, 2023 (view filing)Oct 10-112 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−26.2K$88.03−$2.31M−11.5%202.4K after4 lots10b5-1
Oct 16, 2023 (view filing)Oct 12-134 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−26.2K$85.70−$2.24M−12.9%176.2K after5 lots10b5-1
Oct 16, 2023 (view filing)Oct 12-134 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−26.4K$85.71−$2.26M−3.9%654.5K after4 lots10b5-1
Oct 18, 2023 (view filing)Oct 16-172 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−26.4K$86.42−$2.28M−4.0%628.1K after4 lots10b5-1
Oct 18, 2023 (view filing)Oct 16-172 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−26.3K$86.43−$2.27M−14.9%149.9K after4 lots10b5-1
Oct 20, 2023 (view filing)Oct 18-192 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−26.3K$82.19−$2.16M−17.5%123.6K after5 lots10b5-1
Oct 24, 2023 (view filing)Oct 20-234 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−26.3K$80.51−$2.12M−21.3%97.3K after4 lots10b5-1
Oct 26, 2023 (view filing)Oct 24-252 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−20.6K$80.25−$1.65M−21.2%76.7K after4 lots10b5-1
Oct 30, 2023 (view filing)Oct 26-274 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−17.3K$80.18−$1.39M−22.6%59.4K after4 lots10b5-1
Nov 1, 2023 (view filing)Oct 30-312 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−25.1K$80.01−$2.01M−42.3%34.3K after2 lots10b5-1
Nov 3, 2023 (view filing)Nov 1-22 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−21.8K$80.04−$1.75M−63.6%12.5K after5 lots10b5-1
Nov 7, 2023 (view filing)Nov 3-64 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−10.3K$80.19−$824.6K−82.4%2.20K after3 lots10b5-1
Nov 9, 2023 (view filing)Nov 72 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−2.20K$80.89−$178.0K−100.0%0 after2 lots10b5-1
Jan 5, 2024 (view filing)Jan 3-42 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−26.4K$86.73−$2.29M−4.1%616.8K after6 lots10b5-1
Jan 9, 2024 (view filing)Jan 5-84 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−26.0K$87.40−$2.27M−4.2%590.8K after6 lots10b5-1
Jan 11, 2024 (view filing)Jan 9-102 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−26.0K$87.19−$2.27M−4.4%564.8K after3 lots10b5-1
Jan 16, 2024 (view filing)Jan 11-125 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−26.2K$88.01−$2.31M−4.6%538.6K after3 lots10b5-1
Jan 18, 2024 (view filing)Jan 16-172 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−28.3K$88.53−$2.51M−5.3%510.3K after8 lots10b5-1
Jan 22, 2024 (view filing)Jan 18-194 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−14.6K$88.73−$1.30M−2.9%495.7K after3 lots10b5-1
Jan 24, 2024 (view filing)Jan 22-232 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−96.9K$91.09−$8.83M−19.6%398.7K after4 lots10b5-1
Jan 26, 2024 (view filing)Jan 24-252 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−93.0K$91.19−$8.48M−23.3%305.8K after4 lots10b5-1
Jan 30, 2024 (view filing)Jan 26-294 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−95.8K$90.95−$8.71M−31.3%210.0K after4 lots10b5-1
Feb 1, 2024 (view filing)Jan 302 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−8.61K$90.18−$776.3K−4.1%201.4K after2 lots10b5-1
Feb 5, 2024 (view filing)Feb 1-24 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−84.5K$93.77−$7.92M−42.0%116.9K after7 lots10b5-1
Feb 6, 2024 (view filing)Feb 2-54 daysNemser Earl HVice ChairmanSSaleClass A common stock−100.0K$96.14−$9.61M−32.4%208.8K after3 lots10b5-1
Feb 7, 2024 (view filing)Feb 5-62 daysFrank Thomas AJChief Information OfficerSSaleClass A common stock−39.9K$95.52−$3.81M−34.2%77.0K after4 lots10b5-1
Feb 15, 2024 (view filing)Feb 13-142 daysNemser Earl HVice ChairmanSSaleClass A common stock−75.0K$101.29−$7.60M−35.9%133.8K after4 lots10b5-1
Feb 20, 2024 (view filing)Feb 15-165 daysNemser Earl HVice ChairmanSSaleClass A common stock−15.0K$104.23−$1.56M−11.2%118.8K after6 lots10b5-1
Feb 23, 2024 (view filing)Feb 21-222 daysNemser Earl HVice ChairmanSSaleClass A common stock−10.0K$105.94−$1.06M−8.4%108.8K after2 lots10b5-1
Feb 4, 2025 (view filing)Jan 314 daysBright JillDirectorPPurchaseClass A common stock+135$219.51+$29.6K+5.8%2.48K after
Jul 30, 2025 (view filing)Jul 282 daysNemser Earl HVice ChairmanSSaleClass A common stock−100$65.90−$6.59K0.0%399.9K after
Aug 1, 2025 (view filing)Jul 302 daysNemser Earl HVice ChairmanSSaleClass A common stock−39.8K$66.38−$2.64M−9.9%360.1K after2 lots10b5-1
Aug 4, 2025 (view filing)Jul 31-Aug 14 daysNemser Earl HVice ChairmanSSaleClass A common stock−27.5K$65.28−$1.79M−3.6%732.6K after6 lots10b5-1
Aug 6, 2025 (view filing)Aug 4-52 daysNemser Earl HVice ChairmanSSaleClass A common stock−25.7K$64.17−$1.65M−3.5%707.0K after3 lots10b5-1
Aug 8, 2025 (view filing)Aug 6-72 daysNemser Earl HVice ChairmanSSaleClass A common stock−25.7K$63.72−$1.64M−3.6%681.3K after4 lots10b5-1
Aug 12, 2025 (view filing)Aug 8-114 daysNemser Earl HVice ChairmanSSaleClass A common stock−25.7K$65.88−$1.69M−3.8%655.6K after3 lots10b5-1
Aug 14, 2025 (view filing)Aug 12-132 daysNemser Earl HVice ChairmanSSaleClass A common stock−201.7K$67.39−$13.6M−30.8%453.9K after7 lots10b5-1
Aug 15, 2025 (view filing)Aug 141 dayNemser Earl HVice ChairmanSSaleClass A common stock−53.9K$64.00−$3.45M−11.9%400.0K after2 lots10b5-1
Sep 11, 2025 (view filing)Sep 9-102 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−212.4K$62.19−$13.2M−21.2%787.6K after3 lots10b5-1
Sep 15, 2025 (view filing)Sep 11-124 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−209.8K$63.62−$13.3M−26.6%577.8K after4 lots10b5-1
Sep 17, 2025 (view filing)Sep 15-162 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−195.5K$62.68−$12.3M−33.8%382.3K after5 lots10b5-1
Sep 19, 2025 (view filing)Sep 17-182 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−223.4K$63.54−$14.2M−58.4%159.0K after5 lots10b5-1
Sep 23, 2025 (view filing)Sep 19-224 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−15.3K$63.98−$981.5K−14.2%93.1K afterFrom original3 lots10b5-1
Sep 25, 2025 (view filing)Sep 23-242 daysBrody Paul JonathanChief Financial OfficerSSaleClass A common stock−33.4K$65.09−$2.17M−35.9%59.6K after4 lots10b5-1