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

Rhea-AI Filing Summary

Form 4 filed 08/06/2025 reports insider sales by Earl H. Nemser (Vice Chairman and Director) of Interactive Brokers Group, Inc. (IBKR).

Nemser, through EN Holdings LLC, sold 12,841 Class A shares on 08/04/2025 at a weighted-average price of $64.54 and sold 11,041 and 1,800 Class A shares on 08/05/2025 at weighted-average prices of $63.64 and $64.84, respectively, for a total of 25,682 shares sold. Following these transactions, the filing shows EN Holdings LLC beneficially owning 706,950 Class A shares (down from 719,791). The filing also discloses direct ownership of 427,812 Class A shares attributable to vested and unvested restricted stock units under the amended 2007 Stock Incentive Plan. Footnotes provide transaction price ranges and offer to supply detailed breakdowns on request.

Positive

• Timely, detailed disclosure including weighted-average prices and footnotes offering per-price breakdowns upon request
• Clear distinction between indirect holdings via EN Holdings LLC and direct holdings tied to vested/unvested RSUs

Negative

• Insider sold a total of 25,682 Class A shares across 08/04/2025 and 08/05/2025
• EN Holdings LLC indirect beneficial ownership decreased from 719,791 to 706,950 Class A shares after the reported sales

Insights

Financial Analyst

TL;DR: Insider sales of 25,682 Class A shares were disclosed; holdings remain substantial but were reduced via multiple transactions.

The Form 4 shows sequential sales on 08/04/2025 and 08/05/2025 totaling 25,682 Class A shares by Earl H. Nemser, reported through EN Holdings LLC. Reported weighted-average prices are $64.54, $63.64 and $64.84, with footnotes providing price ranges per transaction batch. After the transactions EN Holdings LLC is reported to beneficially own 706,950 Class A shares while Nemser directly holds 427,812 shares tied to RSUs under the 2007 Plan. This is a transparent disclosure of insider selling; without additional context on timing, motives or company-level developments, the market implication is ambiguous.

Corporate Governance Expert

TL;DR: Filing is procedurally complete and transparent; sales are documented via EN Holdings LLC and RSU details are disclosed.

The submission includes detailed footnotes noting weighted-average prices and an undertaking to provide per-price breakdowns on request, which aligns with good disclosure practice. It specifies the reporting person’s roles (Vice Chairman and Director), the use of EN Holdings LLC for indirect holdings, and the composition of direct holdings as vested and unvested restricted stock units. From a governance perspective, the Form 4 fulfills reporting obligations; the transactions themselves are routine insider dispositions as reported.

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
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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).

X

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)
08/04/2025

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	08/04/2025		S		12,841	D	$64.54(2)	719,791(1)	I	by EN Holdings LLC
Class A common stock	08/05/2025		S		11,041	D	$63.64(3)	708,750(1)	I	by EN Holdings LLC
Class A common stock	08/05/2025		S		1,800	D	$64.84(4)	706,950(1)	I	by EN Holdings LLC
Class A common stock								427,812(5)	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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.87 to $64.75. The Reporting Person undertakes to provide Interactive Brokers Group, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the ranges set forth in footnotes (2) - (4) to this Form 4.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.32 to $64.31.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.32 to $65.05.

5. 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	08/06/2025
	** 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.

FAQ

What transactions does the IBKR Form 4 filed 08/06/2025 report?

The Form 4 reports sales of Class A common stock by Earl H. Nemser: 12,841 shares on 08/04/2025 and 11,041 plus 1,800 shares on 08/05/2025, totaling 25,682 shares.

What prices were reported for the IBKR insider sales?

Weighted-average prices reported are $64.54 (08/04/2025), $63.64 and $64.84 (08/05/2025); footnotes list price ranges for the multiple transactions comprising these averages.

How many IBKR shares does Earl H. Nemser beneficially own after these trades?

The filing shows EN Holdings LLC beneficially owning 706,950 Class A shares after the reported transactions and Nemser directly holding 427,812 Class A shares attributable to vested and unvested RSUs.

What relationship does the reporting person have to Interactive Brokers (IBKR)?

Earl H. Nemser is reported as Vice Chairman and a Director of Interactive Brokers Group, Inc.

Does the Form 4 provide further detail on the sale prices?

Yes. Footnotes state the reported prices are weighted averages across multiple transactions and offer to provide the number of shares sold at each price on request to the Company or the SEC staff.