Transaction Details

Footnotes

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. | The per share price provided represents the closing price of the issuer's Class A common stock on 7/30/2025, the date when the exchange described in footnote (1) took place. | This amount includes (a) Class A common stock attributable to vested restricted stock units that were awarded under the amended 2007 Stock Incentive Plan and (b) unvested restricted stock units that were awarded under the Plan. | On June 17, 2025, the Issuer effected a four-for-one split of its common stock, resulting in the reporting person's ownership of 2,164,122 additional shares of common stock.