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

Rhea-AI Filing Summary

Interactive Brokers Group, Inc. (IBKR) Form 4: Paul J. Brody, who serves as Chief Financial Officer and a director, reported multiple sales of Class A common stock on September 17-18, 2025. The filing lists five sale transactions totaling 223,382 shares sold at weighted-average prices ranging from about $61.28 to $65.54. The Form discloses that certain Class A shares are held indirectly through PJB Holdings LLC. The filing also reports a total beneficial ownership figure of 2,885,496 shares, which the footnote says includes both vested and unvested restricted stock units awarded under the company’s 2007 Stock Incentive Plan.

Positive

• Full disclosure of multiple transactions with weighted-average price ranges provided and footnotes offering willingness to supply detailed execution breakdowns
• Beneficial ownership remains substantial: Form reports 2,885,496 shares including vested and unvested RSUs, indicating continued alignment with shareholders

Negative

• Large insider sales: 223,382 Class A shares disposed over two days, which may be perceived negatively by some investors
• Indirect ownership and redemptions noted, including transfers involving IBG Holdings LLC and PJB Holdings LLC, which could complicate transparency for some stakeholders

Insights

Financial Analyst

Insider sales are sizable but consistent with liquidity events; net impact depends on context of holdings and schedule.

The filing shows five discrete sales over two days totaling 223,382 Class A shares at weighted-average prices between the low-$60s and mid-$60s. Brody’s holdings include a materially larger position reported as 2,885,496 shares including vested and unvested RSUs, and much of the beneficial ownership is held indirectly via PJB Holdings LLC. From an analyst perspective, such clustered sales are notable for size but not necessarily signal a change in company fundamentals absent additional context; they may reflect personal liquidity needs or tax planning tied to redemption and unit conversions described in the footnotes.

Corporate Governance Expert

Significant insider selling merits monitoring for governance transparency and timing relative to company events.

The Form 4 documents concentrated sales by the CFO and director across two days, with disclosures of indirect holdings and transfers from IBG Holdings LLC and partial redemptions. While the report includes explanatory footnotes and an authorized signature, investors and governance monitors should note the size of disposals relative to reported beneficial ownership and that the shares tied to the 2007 Stock Incentive Plan are partly unvested. The filing itself is compliant, but the transactions raise oversight questions about disclosure timing and rationale that stakeholders may request.

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

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Brody Paul Jonathan

(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)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/17/2025

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	09/17/2025		S		61,794	D	$62.06(2)	320,542(1)	I	by PJB Holdings LLC
Class A common stock	09/17/2025		S		44,727	D	$62.48(3)	275,815(1)	I	by PJB Holdings LLC
Class A common stock	09/18/2025		S		7,937	D	$63.43(4)	267,878(1)	I	by PJB Holdings LLC
Class A common stock	09/18/2025		S		37,905	D	$64.4(5)	229,973(1)	I	by PJB Holdings LLC
Class A common stock	09/18/2025		S		71,019	D	$65.05(6)	158,954(1)	I	by PJB Holdings LLC
Class A common stock								2,885,496(7)	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 acquired by a limited liability company, owned indirectly by the Reporting Person, in a partial redemption of its interest in IBG Holdings LLC. Such securities were acquired by IBG Holdings LLC from Interactive Brokers Group, Inc. immediately prior to the redemption in exchange for membership interest in IBG LLC.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.28 to $62.27. 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) - (6) 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 $62.28 to $63.09.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.78 to $63.77.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.78 to $64.77.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.78 to $65.54.

7. 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 Paul J. Brody	09/19/2025
	** 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).
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FAQ

What did IBKR CFO Paul J. Brody report on Form 4?

The filing discloses multiple sales of Class A common stock by Paul J. Brody on September 17-18, 2025, totaling 223,382 shares at weighted-average prices between roughly $61.28 and $65.54.

How many IBKR shares does Paul J. Brody beneficially own after the transactions?

The Form reports a total beneficial ownership figure of 2,885,496 shares, which the footnote states includes both vested and unvested restricted stock units awarded under the 2007 Stock Incentive Plan.

Are Brody’s holdings direct or indirect according to the Form 4?

The filing indicates much of the Class A stock is held indirectly via PJB Holdings LLC and includes shares acquired through partial redemption mechanics involving IBG Holdings LLC.

What price ranges were the shares sold at in the reported transactions?

Footnotes disclose that the sales occurred in multiple transactions at prices ranging from approximately $61.28 to $65.54, with weighted-average prices reported for each sale line.

Does the Form 4 include explanatory footnotes or offer further details?

Yes; the filer provides footnotes explaining the redemption and acquisition mechanics and states the Reporting Person will provide detailed execution breakdowns to the Company, shareholders, or the SEC upon request.