William Peterffy - 31 Dec 2025 Form 4 Insider Report for Interactive Brokers Group, Inc. (IBKR)

Role: Director
Signature: /s/ William Peterffy
Issuer symbol: IBKR
Transactions as of: 31 Dec 2025
Net transactions value: +$25,017
Form type: 4
Filing time: 07 Jan 2026, 16:01:04 UTC
Previous filing: 07 Jan 2025
Next filing: 26 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Peterffy William	Director	ONE PICKWICK PLAZA, GREENWICH	/s/ William Peterffy	07 Jan 2026	0001812281

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	IBKR	Class A common stock	Award	$25,017	+389	+4.2%	$64.31	9,737	31 Dec 2025	Direct	F1, F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.
F2	The price represents the closing price of the issuer's Class A common stock on December 31, 2025.
F3	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.