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

Rhea-AI Filing Summary

Interactive Brokers Group director William Peterffy received an equity award of 389 shares of Class A common stock on December 31, 2025. The award was an annual grant of restricted stock units under the company’s amended 2007 Stock Incentive Plan for serving on the Board of Directors and vested immediately on that date. The grant value was based on a price of $64.31, which was the closing price of the Class A common stock on December 31, 2025. Following this grant, Peterffy directly beneficially owned 9,737 shares of Class A common stock. The company had previously effected a four-for-one stock split of its Class A common stock on June 17, 2025, which resulted in his ownership increasing by 7,011 additional shares at that time.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Peterffy William

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Class A common stock	389	$64.31	$25K

Holdings After Transaction: Class A common stock — 9,737 shares (Direct)

Footnotes (1)

1. This represents an annual grant of restricted stock units under the amended 2007 Stock Incentive Plan ("Plan") for being a member of the issuer's Board of Directors, which vested immediately on 12/31/2025. The price represents the closing price of the issuer's Class A common stock on December 31, 2025. On June 17, 2025, the issuer effected a four-for-one split of its Class A common stock, resulting in the Reporting Person's ownership of 7,011 additional shares of Class A common stock.

Form 4 Insider Transactions: What Each Field Means →

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^*

Peterffy William

(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)
12/31/2025

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	12/31/2025	01/05/2026	A		389(1)	A	$64.31(2)	9,737(3)	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. This represents an annual grant of restricted stock units under the amended 2007 Stock Incentive Plan ("Plan") for being a member of the issuer's Board of Directors, which vested immediately on 12/31/2025.

2. The price represents the closing price of the issuer's Class A common stock on December 31, 2025.

3. On June 17, 2025, the issuer effected a four-for-one split of its Class A common stock, resulting in the Reporting Person's ownership of 7,011 additional shares of Class A common stock.

	/s/ William Peterffy	01/07/2026
	** 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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