| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Boege Kathleen M | EVP, CHIEF LEGAL OFC, AND SEC | 9700 WEST HIGGINS ROAD, 8TH FLOOR, ROSEMONT | /s/David A. Dykstra, Attorney-in-fact | 27 Feb 2026 | 0001567078 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WTFC | Common Stock | Tax liability | $287,074 | -1,916 | -11% | $149.83 | 14,967 | 25 Feb 2026 | Direct | |
| holding | WTFC | Common Stock | 3 | 25 Feb 2026 | by ESPP |