Interactive Brokers Group, Inc.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The summary of the Company’s stock repurchase activity for the three months ended June 30, 2026, is as follows:

All shares were repurchased from employees who elected to have shares withheld to satisfy their tax withholding obligations related to the May 8, 2026 vesting of the Company's Stock Incentive Plan. The Company sold these shares in open market transactions. See Note 10 – “Employee Incentive Plans” to the unaudited condensed consolidated financial statements in Item 1, Part 1 of this Quarterly Report on Form 10-Q for more information regarding the Company's Stock Incentive Plan.

The Company provides employees with two options to pay for their withholding tax obligations which become due when restricted stock units vest: either (1) reimburse the Company via cash payment, or (2) elect to have IBG LLC withhold a portion of the vesting shares. In the case of employees who elect to have IBG LLC withhold shares to cover their tax obligations, those shares are transferred to IBG LLC, which in turn, sells those shares in open market transactions to recover the amount paid to the tax authorities on the employees’ behalf. During the three months ended June 30, 2026, the Company sold 1,729,969 shares of its Class A common stock (with a fair value of $150 million) in open market transactions. The proceeds were used to reimburse the Company for withholding taxes paid by the Company on the employees’ behalf.

On October 13, 2015, the Company filed a Post-Effective Amendment to multiple Registration Statements filed under the Securities Act of 1933, as amended on Form S-8 that registered shares of the Company’s Class A common stock, $0.01 par value, for issuance under the Company’s amended Stock Incentive Plan. As per General Instruction C of Form S-8, the sale of the shares described above constitutes a resale or reoffer of the Company’s Class A common stock. The Post-Effective Amendment contains a reoffer prospectus that registers 25,600,000 shares of the Company’s Class A common stock. The reoffer prospectus allows for future sales by IBG LLC, on a continuous or delayed basis, to the public without restriction.