Interactive Brokers (IBKR) director reports Form 4 stock sales

Rhea-AI Filing Summary

Interactive Brokers Group, Inc. (IBKR) director reported open‑market sales of Class A common stock. On 10/27/2025, the reporting person sold 7,500 shares at a weighted average price of $69.73, with individual trades ranging from $69.63 to $69.82. On 10/28/2025, they sold 6,855 shares at a weighted average price of $69.15, with trades between $69.15 and $69.18.

Following these transactions, the reporting person beneficially owns 209,349 shares, held directly.

Insights

Governance and insider activity analyst

Routine insider sale disclosed; neutral impact.

The filing lists two open‑market sales by an IBKR director: 7,500 shares at a weighted average of $69.73 on 10/27/2025, and 6,855 shares at a weighted average of $69.15 on 10/28/2025. Prices were reported as weighted averages with stated intra‑day ranges.

After these sales, direct beneficial ownership stands at 209,349 shares. The disclosure follows standard Form 4 practice and includes the “S” transaction code for sales. Actual market impact depends on overall trading volumes and holder 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
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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).

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^*

Harris Lawrence E

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/27/2025

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	10/27/2025		S		7,500	D	$69.73(1)	216,204	D
Class A common stock	10/28/2025		S		6,855	D	$69.15(2)	209,349	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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.63 to $69.82. 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 (1) - (2) to this Form 4.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.15 to $69.18.

	/s/ Raymond Bussiere as authorized signatory for Lawrence E. Harris	10/29/2025
	** 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 insider activity did IBKR report?

A director reported open‑market sales of Class A common stock on 10/27/2025 and 10/28/2025.

How many IBKR shares were sold and at what prices?

The director sold 7,500 shares at a weighted average of $69.73 and 6,855 shares at a weighted average of $69.15.

What were the price ranges for the IBKR share sales?

On 10/27, trades ranged from $69.63–$69.82; on 10/28, from $69.15–$69.18.

How many IBKR shares does the insider own after the transactions?

The reporting person beneficially owns 209,349 shares directly after the reported sales.

What was the transaction code on the Form 4 for IBKR?

The transactions are coded S, indicating open‑market or private sales of non‑derivative securities.