| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Boege Kathleen M | EVP, CHIEF LEGAL OFC, AND SEC | 9700 WEST HIGGINS ROAD, 8TH FLOOR, ROSEMONT | /s/Kathleen M. Boege | 28 Jan 2026 | 0001567078 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WTFC | Common Stock | Tax liability | $135,966 | -930 | -3.2% | $146.20 | 27,883 | 26 Jan 2026 | Direct | |
| holding | WTFC | Common Stock | 3 | 26 Jan 2026 | by ESPP |