| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Nemser Earl H | Vice Chairman, Director | ONE PICKWICK PLAZA, GREENWICH | /s/ Raymond Bussiere as authorized signatory for Earl H. Nemser | 01 Aug 2025 | 0001391400 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IBKR | Class A common stock | Award | $26,488,000 | +400,000 | +111% | $66.22 | 760,114 | 30 Jul 2025 | by EN Holdings LLC | F1, F2, F3 |
| holding | IBKR | Class A common stock | 427,812 | 30 Jul 2025 | Direct | F4 |
| Id | Content |
|---|---|
| F1 | Represents number of securities acquired by a limited liability company, owned by the Reporting Person and his affiliates, 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 interests in IBG LLC. |
| F2 | 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 (6) took place. |
| F3 | Represents number of securities owned by EN Holdings LLC, which is owned by the reporting person and his affiliates. |
| 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. |