| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Sackett Brian Roy | Director | 6402 80TH AVENUE, MECOSTA | /s/ Jennifer L. Gill, By Power of Attorney | 23 Jan 2026 | 0002038303 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ISBA | common | Purchase | $20,000 | +403 | +11% | $49.58 | 4,159 | 20 Jan 2026 | Direct | F1, F2 |
| 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. |