| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Hahnfeld Jeffrey D | EVP-CONTROLLER & CHIEF ACC OFF | 9700 WEST HIGGINS ROAD, 8TH FLOOR, ROSEMONT | /s/Kathleen M. Boege, Attorney-in-fact | 06 Mar 2026 | 0001977046 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WTFC | Common Stock | Sale | $77,194 | -530 | -31% | $145.65 | 1,195 | 04 Mar 2026 | Direct |