| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| McDonnell Neil Michael | President, Director | 401 N MAIN ST, MOUNT PLEASANT | /s/ Jennifer L. Gill, By Power of Attorney | 23 Jan 2026 | 0001666463 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ISBA | common | Purchase | $15,000 | +303 | +3.2% | $49.58 | 9,870 | 20 Jan 2026 | Direct | F1, F2 |
| holding | ISBA | common | 42 | 20 Jan 2026 | By immediate family member |
| Id | Content |
|---|---|
| F1 | Shares acquired with director fees pursuant to the Isabella Bank Corporation And Related Companies Deferred Compensation Plan For Directors. |
| F2 | Includes shares acquired through quarterly dividend reinvestment. |