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

Rhea-AI Filing Summary

Paul Jonathan Brody, who is listed as Chief Financial Officer and a director of Interactive Brokers Group, Inc. (IBKR), reported multiple open-market sales of Class A common stock on September 29–30, 2025. The Form 4 shows sales of 7,414; 8,792; 2,021; 1,979; and 1,155 shares at weighted-average prices ranging from about $66.64 to $70.26. The filing lists changing beneficial ownership totals after each reported sale and notes that certain Class A shares (listed as 2,885,496) are attributable to vested and unvested restricted stock units under the company plan. The form is signed by an authorized signatory on behalf of Mr. Brody and provides footnotes disclosing price ranges and the indirect ownership via PJB Holdings LLC.

Positive

• Timely and detailed disclosure of multiple open-market sales with weighted-average price ranges provided in footnotes
• Clarification of indirect ownership via PJB Holdings LLC and attribution of shares to vested and unvested restricted stock units

Negative

• Insider sales reported (total of 21,361 shares sold across reported transactions) which may be viewed negatively by some investors
• Form does not state whether sales were made under a pre-arranged trading plan (no explicit mention of a 10b5-1 plan)

Insights

Securities Analyst

TL;DR: Insider executed multiple small open-market sales over two days; Form 4 provides weighted-average prices and post-sale holdings.

The reported transactions are open-market sales executed on September 29–30, 2025, with each sale disclosed at weighted-average prices and the resulting beneficial ownership reported after each trade. The filing clarifies that some holdings are held indirectly through PJB Holdings LLC and that a large amount of shares reflects vested and unvested restricted stock units. From a trading-disclosure perspective the filing is clear and provides the price ranges in footnotes for auditability. There is no additional financial or forward-looking information in this filing.

Corporate Governance Expert

TL;DR: The filing documents director/officer sales and appropriate disclosure of indirect ownership and equity awards.

The Form 4 meets Section 16 reporting requirements by identifying the reporting person, relationship to the issuer, dates and amounts of transactions, and post-transaction beneficial ownership. It also explains the mechanics behind certain share movements (partial redemption of membership interest and RSU attribution). The disclosure of indirect ownership through PJB Holdings LLC and the RSU footnote supports governance transparency. The filing does not state motives or whether any trading plans were in place.

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).

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)
09/29/2025

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	09/29/2025		S		7,414	D	$67.16(2)	20,875(1)	I	by PJB Holdings LLC
Class A common stock	09/29/2025		S		8,792	D	$68.27(3)	12,083(1)	I	by PJB Holdings LLC
Class A common stock	09/29/2025		S		2,021	D	$68.7(4)	10,062(1)	I	by PJB Holdings LLC
Class A common stock	09/30/2025		S		1,979	D	$69.3(5)	8,083(1)	I	by PJB Holdings LLC
Class A common stock	09/30/2025		S		1,155	D	$70(6)	6,928(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 $66.64 to $67.63. 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 $67.64 to $68.63.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.64 to $68.82.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.75 to $69.74.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.75 to $70.26.

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	10/01/2025
	** 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

Who filed this Form 4 for Interactive Brokers Group (IBKR)?

The filing reports transactions by Paul Jonathan Brody, identified as Chief Financial Officer and a director of Interactive Brokers Group.

What securities were transacted and when?

All reported transactions were in Class A common stock, executed on September 29 and 30, 2025.

How many shares were sold and at what prices?

The Form 4 shows sales of 7,414; 8,792; 2,021; 1,979; and 1,155 shares with weighted-average prices and footnote ranges from about $66.64 to $70.26.

What is the reporter's ownership after the transactions?

The filing lists successive post-transaction beneficial ownership totals (for example 20,875; 12,083; 10,062; 8,083; 6,928) and also lists 2,885,496 shares attributable to vested and unvested restricted stock units.

Are the reported holdings direct or indirect?

The Form 4 discloses that holdings are indirect through PJB Holdings LLC for the reported lines.