| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| ZIDAR THOMAS P | EXECUTIVE VICE PRESIDENT | 9700 WEST HIGGINS ROAD, 8TH FLOOR, ROSEMONT | /s/Kathleen M. Boege, Attorney-in-fact | 28 Nov 2025 | 0001365691 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WTFC | Common Stock | Gift | $0 | -1,000 | -2% | $0.000000 | 48,261 | 26 Nov 2025 | Direct | |
| holding | WTFC | Common Stock | 9,156 | 26 Nov 2025 | By ESPP |