| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| STOEHR DAVID L | CHIEF FINANCIAL OFFICER | 9700 WEST HIGGINS ROAD, 8TH FLOOR, ROSEMONT | /s/Kathleen M. Boege, Attorney-in-fact | 29 Jan 2026 | 0001244289 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WTFC | Common Stock | Sale | $365,254 | -2,499 | -12% | $146.16 | 18,638 | 29 Jan 2026 | Direct |