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

Rhea-AI Filing Summary

Interactive Brokers Group, Inc. (IBKR) Form 4 summary: Paul J. Brody, listed as Chief Financial Officer and a director, reported a series of sales of Class A common stock on September 25–26, 2025. The filing lists five reported dispositions totaling 31,354 shares sold across multiple transactions at weighted-average prices ranging from $63.02 to $66.30. The report notes these sales were effected in multiple trades and the reporting person will provide a detailed breakdown upon request. The filing also discloses ongoing indirect beneficial ownership through PJB Holdings LLC and a reported aggregate amount of 2,885,496 shares attributed to the reporting person, which includes vested and unvested restricted stock units awarded under the companys 2007 Stock Incentive Plan.

Positive

• Clear disclosure of weighted-average sale prices and an undertaking to provide per-trade details on request
• Continued indirect beneficial ownership through PJB Holdings LLC is explicitly stated
• Aggregate beneficial ownership including vested and unvested RSUs (2,885,496 shares) is disclosed

Negative

• Insider dispositions totaling 31,354 Class A shares were reported on 09/25/2025 and 09/26/2025
• Sales executed across multiple price ranges ($63.02 to $66.30), which may be relevant to investors tracking insider activity

Insights

Securities Analyst

TL;DR: Insider CFO sold 31,354 IBKR shares at ~$63–$66; retains substantial indirect ownership including RSUs totaling 2,885,496 shares.

The transactions are disclosed clearly with weighted-average prices and an undertaking to provide per-trade detail on request, which aids transparency. The sales occurred over two days and are reported as indirect holdings via PJB Holdings LLC. From an investor reporting perspective this is a routine Section 16 disclosure documenting insider disposals and existing beneficial ownership; the filing does not state motive or indicate changes to employment or company guidance.

Corporate Governance Expert

TL;DR: Form 4 shows routine insider disposals with full explanatory footnotes and maintained indirect ownership; no governance changes disclosed.

The filing provides detailed explanatory footnotes about the mechanics of the transactions, including a partial redemption from IBG Holdings LLC and the composition of the reported aggregate beneficial ownership (vested and unvested RSUs). There is no indication of resignation, change in role, or other corporate governance events in this filing. The reporting and signature comply with Section 16 disclosure format.

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

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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)
09/25/2025

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	09/25/2025		S		1,182	D	$63.81(2)	58,461(1)	I	by PJB Holdings LLC
Class A common stock	09/25/2025		S		8,866	D	$64.76(3)	49,595(1)	I	by PJB Holdings LLC
Class A common stock	09/25/2025		S		4,248	D	$65.19(4)	45,347(1)	I	by PJB Holdings LLC
Class A common stock	09/26/2025		S		15,477	D	$65.74(5)	29,870(1)	I	by PJB Holdings LLC
Class A common stock	09/26/2025		S		1,581	D	$66.15(6)	28,289(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 $63.02 to $64.01. 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 $64.02 to $65.01.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.02 to $65.49.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.12 to $66.11.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.12 to $66.30.

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	09/29/2025
	** 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 did Paul J. Brody report on the IBKR Form 4?

The filing reports multiple sales of Class A common stock by Paul J. Brody on September 25–26, 2025, totaling 31,354 shares sold and continued indirect beneficial ownership via PJB Holdings LLC.

How many IBKR shares does the reporting person beneficially own after these transactions?

The Form 4 discloses an aggregate amount of 2,885,496 shares attributed to the reporting person, which includes vested and unvested restricted stock units under the 2007 Stock Incentive Plan.

At what prices were the IBKR shares sold?

Sales were reported at weighted-average prices with transactions ranging from $63.02 to $66.30 per share; the filing notes multiple trades within those ranges and offers to provide detailed per-trade counts on request.

Does the Form 4 indicate any change in Brodys role at IBKR?

No. The filing lists Paul J. Brody as Chief Financial Officer and Director and does not disclose any change in role or employment in this Form 4.

Who signed the Form 4 for Paul J. Brody?

The Form 4 was signed by Raymond Bussiere as authorized signatory for Paul J. Brody on 09/29/2025.