Interactive Brokers Group, Inc. — Director's Dealing 2025

Dec 30, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Interactive Brokers Group, Inc. (IBKR)
CIK: 0001381197
Period of Report: 2025-12-29

Reporting Person: Galik Milan (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-29	Class A common stock	J	895688	—	Disposed	0	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A common stock	3245000	Direct

Footnotes

F1: On June 17, 2025, the Issuer effected a four-for-one split of its common stock, resulting in the Reporting Person's indirect ownership of 671,766 additional shares of common stock.

F2: On December 29, 2025, an immediate family member of the Reporting Person transferred 895,688 shares of the Issuer's Class A common stock to an annuity trust of which the Reporting Person is not a beneficiary. The Reporting Person has no investment control over the securities in the trust and no longer has a pecuniary interest in those shares.

F3: On June 17, 2025, the Issuer effected a four-for-one split of its common stock, resulting in the Reporting Person's ownership of 2,433,750 additional shares of common stock.

F4: 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.