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

Rhea-AI Filing Summary

Interactive Brokers Group, Inc. (IBKR) insider Paul J. Brody, who serves as Chief Financial Officer and a director, reported multiple sales of Class A common stock on 09/09/2025 and 09/10/2025 under a written plan intended to satisfy Rule 10b5-1. The Form 4 discloses three sell transactions totaling 212,399 shares at weighted-average prices ranging from about $60.68 to $62.92. The filing shows indirect beneficial ownership amounts after those transactions of 977,463, 892,507, and 787,601 shares in the listed rows, and references an aggregate holding related to restricted stock units. The Form 4 was signed by an authorized signatory on behalf of Mr. Brody.

Positive

• Sales executed under a Rule 10b5-1 plan, indicating the trades were pre-arranged and intended to provide an affirmative defense against insider trading claims
• Filing discloses detailed price ranges and footnotes, improving transparency about how the weighted-average prices were derived
• Reporting person retains significant beneficial ownership through indirect holdings and restricted stock units as disclosed

Negative

• Insider sold a total of 212,399 shares, which is a material disposition that reduces the insiders direct/indirect stake
• Weighted-average sale prices were in a relatively narrow low-$60 range, indicating concentrated selling activity over two days

Insights

Securities Analyst

TL;DR: CFO sold a material block of shares via a 10b5-1 plan; transactions appear routine rather than unexpected.

The reported sales total 212,399 shares executed across 09/09/2025 and 09/10/2025 at weighted-average prices in the low $60s. The disclosure that the transactions were made pursuant to a written plan consistent with Rule 10b5-1 suggests the trades were pre-planned and not based on undisclosed material information. The filing shows substantial remaining indirect holdings reported in successive rows, and references vested and unvested restricted stock units in footnote disclosures, indicating continued alignment with equity ownership in the company.

Corporate Governance Expert

TL;DR: Disclosure aligns with good governance practices; use of an authorized signatory and 10b5-1 notation improves transparency.

The Form 4 includes explicit identification of the reporting persons roles as CFO and director and marks the transaction as executed under a Rule 10b5-1 trading plan, which is a common governance mechanism to mitigate insider-trading concerns. The form is signed by an authorized signatory, and footnotes provide price ranges and detail on restricted stock units. These elements increase transparency for stakeholders reviewing insider activity.

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).

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^*

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)
09/09/2025

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	09/09/2025		S		22,537	D	$61.3(2)	977,463(1)	I	by PJB Holdings LLC
Class A common stock	09/09/2025		S		84,956	D	$62.02(3)	892,507(1)	I	by PJB Holdings LLC
Class A common stock	09/10/2025		S		104,906	D	$62.51(4)	787,601(1)	I	by PJB Holdings LLC
Class A common stock								2,885,496(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 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 $60.68 to $61.67. 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 $61.68 to $62.42.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.01 to $62.92.

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 Paul J. Brody	09/11/2025
	** 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 Interactive Brokers (IBKR) CFO Paul J. Brody report on Form 4?

The Form 4 reports three sell transactions on 09/09/2025 and 09/10/2025 totaling 212,399 Class A shares, with weighted-average prices reported in footnotes.

Were the sales by Paul J. Brody executed under a trading plan?

Yes. The filer checked the box indicating the transactions were made pursuant to a 10b5-1 written plan intended to provide an affirmative defense.

How much beneficial ownership did the filing show after the sales?

The filing lists indirect beneficial ownership amounts in the transaction rows of 977,463, 892,507, and 787,601 shares following the reported transactions.

What price ranges were the shares sold at?

Footnotes state the sales occurred in multiple transactions at prices ranging approximately from $60.68 to $62.92, with weighted-average prices reported for each row.

Does the Form 4 disclose any equity awards?

Yes. Footnote (5) indicates the reported beneficial ownership includes vested and unvested restricted stock units awarded under the amended 2007 Stock Incentive Plan.