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[Form 4] Interactive Brokers Group, Inc. Insider Trading Activity

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
4
Rhea-AI Filing Summary

Insider: Earl H. Nemser, Vice Chairman & Director of Interactive Brokers Group (IBKR).

Transaction: On 07/28/2025 Nemser executed an open-market sale (Code S) of 100 Class A shares at $65.90 per share through his affiliate EN Holdings LLC.

Post-transaction holdings: 399,900 Class A shares held indirectly via EN Holdings LLC and 427,812 shares held directly (vested & unvested RSUs), totaling roughly 827,712 shares.

The sale represents <0.01 % of both IBKR鈥檚 outstanding shares and Nemser鈥檚 reported stake, signalling no meaningful change in ownership or control. No derivative security activity was disclosed.

Informazione interna: Earl H. Nemser, Vicepresidente e Direttore di Interactive Brokers Group (IBKR).

Transazione: Il 28/07/2025 Nemser ha effettuato una vendita sul mercato aperto (Codice S) di 100 azioni di Classe A a $65,90 per azione tramite la sua affiliata EN Holdings LLC.

Detenzioni post-transazione: 399.900 azioni di Classe A detenute indirettamente tramite EN Holdings LLC e 427.812 azioni detenute direttamente (RSU maturate e non maturate), per un totale di circa 827.712 azioni.

La vendita rappresenta meno dello 0,01 % sia delle azioni in circolazione di IBKR sia della partecipazione dichiarata di Nemser, indicando nessun cambiamento significativo nel controllo o nella propriet脿. Non sono state divulgate attivit脿 su strumenti derivati.

Informaci贸n privilegiada: Earl H. Nemser, Vicepresidente y Director de Interactive Brokers Group (IBKR).

罢谤补苍蝉补肠肠颈贸苍: El 28/07/2025 Nemser realiz贸 una venta en el mercado abierto (C贸digo S) de 100 acciones Clase A a $65,90 por acci贸n a trav茅s de su afiliada EN Holdings LLC.

Participaciones despu茅s de la transacci贸n: 399.900 acciones Clase A mantenidas indirectamente a trav茅s de EN Holdings LLC y 427.812 acciones mantenidas directamente (RSU adquiridas y no adquiridas), sumando un total aproximado de 827.712 acciones.

La venta representa menos del 0,01 % tanto de las acciones en circulaci贸n de IBKR como de la participaci贸n reportada de Nemser, indicando que no hay un cambio significativo en la propiedad o control. No se inform贸 actividad con valores derivados.

雮措秬鞛�: 鞏� H. 雱挫劀, 鞚疙劙霝欗嫲敫� 敫岆旎れ姢 攴鸽９(IBKR) 攵�須岇灔 瓴� 鞚挫偓.

瓯半灅 雮挫棴: 2025雲� 7鞗� 28鞚� 雱挫劀電� 攴胳潣 瓿勳棿靷� EN Holdings LLC毳� 韱淀暣 100欤� 韥措灅鞀� A 欤检嫕鞚� 欤茧嫻 $65.90鞐� 瓿店皽鞁滌灔 韺愲Г(Code S)頄堨姷雼堧嫟.

瓯半灅 頉� 氤挫湢 欤检嫕: EN Holdings LLC毳� 韱淀暣 臧勋为鞝侅溂搿� 氤挫湢頃� 399,900欤� 韥措灅鞀� A 欤检嫕瓿� 歆侅为鞝侅溂搿� 氤挫湢頃� 427,812欤�(氩犾姢韺呺悳 氚� 氩犾姢韺呺悩歆� 鞎婌潃 RSU 韽暔), 齑� 鞎� 827,712欤检瀰雼堧嫟.

鞚措矆 毵る弰電� IBKR鞚� 氚滍枆 欤检嫕瓿� 雱挫劀臧� 氤搓碃頃� 歆�攵� 氇憪鞚� 0.01% 氙鸽鞐� 頃措嫻頃橂┌, 靻岇湢甓岇澊雮� 歆�氚瓣秾鞐� 鞚橂 鞛堧姅 氤�頇旉皜 鞐嗢潓鞚� 雮橅儉雰呺媹雼�. 韺岇儩靸來拡 甏�霠� 頇滊彊鞚� 瓿店皽霅橃 鞎婌晿鞀惦媹雼�.

Initi茅 : Earl H. Nemser, Vice-pr茅sident et Directeur du groupe Interactive Brokers (IBKR).

Transaction : Le 28/07/2025, Nemser a effectu茅 une vente sur le march茅 libre (Code S) de 100 actions de Classe A au prix de 65,90 $ par action via sa filiale EN Holdings LLC.

Positions apr猫s la transaction : 399 900 actions de Classe A d茅tenues indirectement via EN Holdings LLC et 427 812 actions d茅tenues directement (RSU acquises et non acquises), soit un total d'environ 827 712 actions.

Cette vente repr茅sente moins de 0,01 % des actions en circulation d鈥橧BKR et de la participation d茅clar茅e de Nemser, indiquant qu鈥檌l n鈥檡 a pas de changement significatif dans la propri茅t茅 ou le contr么le. Aucune activit茅 sur titres d茅riv茅s n鈥檃 茅t茅 divulgu茅e.

Insider: Earl H. Nemser, Vizevorsitzender und Direktor der Interactive Brokers Group (IBKR).

Transaktion: Am 28.07.2025 f眉hrte Nemser 眉ber seine Tochtergesellschaft EN Holdings LLC einen Verkauf von 100 Class A Aktien zum Preis von 65,90 $ pro Aktie am offenen Markt (Code S) durch.

Best盲nde nach der Transaktion: 399.900 Class A Aktien, die indirekt 眉ber EN Holdings LLC gehalten werden, und 427.812 Aktien, die direkt gehalten werden (unmittelbar und unverfallbare RSUs), insgesamt etwa 827.712 Aktien.

Der Verkauf entspricht weniger als 0,01 % sowohl der ausstehenden IBKR-Aktien als auch von Nemsers gemeldetem Anteil und signalisiert keine wesentliche 脛nderung der Eigentums- oder Kontrollverh盲ltnisse. Es wurden keine Aktivit盲ten mit Derivaten gemeldet.

Positive
  • None.
Negative
  • None.

Insights

TL;DR: De minimis insider sale; immaterial to ownership structure or market sentiment.

The 100-share sale at $65.90 reduces Nemser鈥檚 indirect stake by only 0.025 %. With ~827k shares remaining, governance alignment stays intact. No derivatives indicate straightforward liquidity management rather than hedging or signal of concern. Market impact expected to be neutral.

TL;DR: Ownership oversight unchanged; transaction raises no governance red flags.

Nemser retains substantial equity, preserving incentive alignment with shareholders. Transaction complies with Section 16 reporting and does not trigger any control thresholds. Lack of 10b5-1 plan disclosure suggests discretionary timing but scale is too small for concern.

Informazione interna: Earl H. Nemser, Vicepresidente e Direttore di Interactive Brokers Group (IBKR).

Transazione: Il 28/07/2025 Nemser ha effettuato una vendita sul mercato aperto (Codice S) di 100 azioni di Classe A a $65,90 per azione tramite la sua affiliata EN Holdings LLC.

Detenzioni post-transazione: 399.900 azioni di Classe A detenute indirettamente tramite EN Holdings LLC e 427.812 azioni detenute direttamente (RSU maturate e non maturate), per un totale di circa 827.712 azioni.

La vendita rappresenta meno dello 0,01 % sia delle azioni in circolazione di IBKR sia della partecipazione dichiarata di Nemser, indicando nessun cambiamento significativo nel controllo o nella propriet脿. Non sono state divulgate attivit脿 su strumenti derivati.

Informaci贸n privilegiada: Earl H. Nemser, Vicepresidente y Director de Interactive Brokers Group (IBKR).

罢谤补苍蝉补肠肠颈贸苍: El 28/07/2025 Nemser realiz贸 una venta en el mercado abierto (C贸digo S) de 100 acciones Clase A a $65,90 por acci贸n a trav茅s de su afiliada EN Holdings LLC.

Participaciones despu茅s de la transacci贸n: 399.900 acciones Clase A mantenidas indirectamente a trav茅s de EN Holdings LLC y 427.812 acciones mantenidas directamente (RSU adquiridas y no adquiridas), sumando un total aproximado de 827.712 acciones.

La venta representa menos del 0,01 % tanto de las acciones en circulaci贸n de IBKR como de la participaci贸n reportada de Nemser, indicando que no hay un cambio significativo en la propiedad o control. No se inform贸 actividad con valores derivados.

雮措秬鞛�: 鞏� H. 雱挫劀, 鞚疙劙霝欗嫲敫� 敫岆旎れ姢 攴鸽９(IBKR) 攵�須岇灔 瓴� 鞚挫偓.

瓯半灅 雮挫棴: 2025雲� 7鞗� 28鞚� 雱挫劀電� 攴胳潣 瓿勳棿靷� EN Holdings LLC毳� 韱淀暣 100欤� 韥措灅鞀� A 欤检嫕鞚� 欤茧嫻 $65.90鞐� 瓿店皽鞁滌灔 韺愲Г(Code S)頄堨姷雼堧嫟.

瓯半灅 頉� 氤挫湢 欤检嫕: EN Holdings LLC毳� 韱淀暣 臧勋为鞝侅溂搿� 氤挫湢頃� 399,900欤� 韥措灅鞀� A 欤检嫕瓿� 歆侅为鞝侅溂搿� 氤挫湢頃� 427,812欤�(氩犾姢韺呺悳 氚� 氩犾姢韺呺悩歆� 鞎婌潃 RSU 韽暔), 齑� 鞎� 827,712欤检瀰雼堧嫟.

鞚措矆 毵る弰電� IBKR鞚� 氚滍枆 欤检嫕瓿� 雱挫劀臧� 氤搓碃頃� 歆�攵� 氇憪鞚� 0.01% 氙鸽鞐� 頃措嫻頃橂┌, 靻岇湢甓岇澊雮� 歆�氚瓣秾鞐� 鞚橂 鞛堧姅 氤�頇旉皜 鞐嗢潓鞚� 雮橅儉雰呺媹雼�. 韺岇儩靸來拡 甏�霠� 頇滊彊鞚� 瓿店皽霅橃 鞎婌晿鞀惦媹雼�.

Initi茅 : Earl H. Nemser, Vice-pr茅sident et Directeur du groupe Interactive Brokers (IBKR).

Transaction : Le 28/07/2025, Nemser a effectu茅 une vente sur le march茅 libre (Code S) de 100 actions de Classe A au prix de 65,90 $ par action via sa filiale EN Holdings LLC.

Positions apr猫s la transaction : 399 900 actions de Classe A d茅tenues indirectement via EN Holdings LLC et 427 812 actions d茅tenues directement (RSU acquises et non acquises), soit un total d'environ 827 712 actions.

Cette vente repr茅sente moins de 0,01 % des actions en circulation d鈥橧BKR et de la participation d茅clar茅e de Nemser, indiquant qu鈥檌l n鈥檡 a pas de changement significatif dans la propri茅t茅 ou le contr么le. Aucune activit茅 sur titres d茅riv茅s n鈥檃 茅t茅 divulgu茅e.

Insider: Earl H. Nemser, Vizevorsitzender und Direktor der Interactive Brokers Group (IBKR).

Transaktion: Am 28.07.2025 f眉hrte Nemser 眉ber seine Tochtergesellschaft EN Holdings LLC einen Verkauf von 100 Class A Aktien zum Preis von 65,90 $ pro Aktie am offenen Markt (Code S) durch.

Best盲nde nach der Transaktion: 399.900 Class A Aktien, die indirekt 眉ber EN Holdings LLC gehalten werden, und 427.812 Aktien, die direkt gehalten werden (unmittelbar und unverfallbare RSUs), insgesamt etwa 827.712 Aktien.

Der Verkauf entspricht weniger als 0,01 % sowohl der ausstehenden IBKR-Aktien als auch von Nemsers gemeldetem Anteil und signalisiert keine wesentliche 脛nderung der Eigentums- oder Kontrollverh盲ltnisse. Es wurden keine Aktivit盲ten mit Derivaten gemeldet.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Nemser Earl H
(Last) (First) (Middle)
ONE PICKWICK PLAZA
(Street)
GREENWICH CT 06830
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Interactive Brokers Group, Inc. [ IBKR ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
X Officer (give title below) Other (specify below)
Vice Chairman
3. Date of Earliest Transaction (Month/Day/Year)
07/28/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Class A common stock 07/28/2025 S 100 D $65.9 399,900(1) I by EN Holdings LLC
Class A common stock 427,812(2) D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. Represents number of securities owned by EN Holdings LLC, which is owned by the reporting person and his affiliates.
2. This amount includes (a) Class A common stock attributable to vested restricted stock units that were awarded under the amended 2007 Stock Incentive Plan ("Plan") and (b) unvested restricted stock units that were awarded under the Plan.
/s/ Raymond Bussiere as authorized signatory for Earl H. Nemser 07/30/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Source:

FAQ

How many Interactive Brokers (IBKR) shares did Earl H. Nemser sell?

He sold 100 Class A common shares on 07/28/2025.

At what price were the IBKR shares sold?

The shares were sold at $65.90 per share.

How many IBKR shares does Nemser own after the sale?

He owns 399,900 shares indirectly via EN Holdings LLC and 427,812 shares directly, totaling roughly 827,712 shares.

What does transaction code "S" signify in a Form 4?

Code S denotes an open-market sale of the issuer鈥檚 securities.

Were any derivative securities involved in this filing?

No. The filing reports only non-derivative Class A common stock activity.

Is the sale considered material to IBKR investors?

Given its tiny scale (<0.01 % of shares outstanding), the sale is generally not material to investors.
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Interactive Brokers Group Inc

NASDAQ:IBKR

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