| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| MULCAHY DAVID S. | Director | 2900 UNIVERSITY BOULEVARD, AMES | /s/ Brandon E. Ziegler as attorney-in-fact for David S. Mulcahy | 12 Dec 2025 | 0001260541 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WK | Class A Common Stock | Sale | $106,323 | -1,162 | -0.48% | $91.50 | 240,373 | 10 Dec 2025 | Direct |