| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| WEST ALFRED P JR | Executive Chairman, Director | 1 FREEDOM VALLEY DRIVE, OAKS | /s/ Alfred P. West, Jr., by Diane Gallagher, attorney in fact | 29 Dec 2025 | 0001059374 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SEIC | Common Stock | Tax liability | $89,375 | -1,100 | -0.02% | $81.25 | 6,941,712 | 05 Dec 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Shares withheld to satisfy tax obligations upon vesting of RSUs. This transaction was inadvertently not reported on a timely basis. |