| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Galik Milan | Chief Executive Officer, Director | ONE PICKWICK PLAZA, GREENWICH | /s/ Raymond Bussiere as authorized signatory for Milan Galik | 2025-06-03 | 0001391404 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IBKR | Class A common stock | Tax liability | -$11.8M | -63.6K | -7.27% | $185.60 | 811K | May 9, 2025 | Direct | F1, F2 |
| holding | IBKR | Class A common stock | 224K | May 9, 2025 | Immediate Family Member | F3 |
| Id | Content |
|---|---|
| F1 | The price represents the closing price of the issuer's Class A common stock as of May 9, 2025, the vesting date. |
| F2 | 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. |
| F3 | Represents the number of shares owned by an immediate family member in which the Reporting Person has a pecuniary interest. |