| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Mauney William Marshall Jr | Vice President, R&D | 8550 MOSLEY ROAD, HOUSTON | Michael W. Metcalf, Power of Attorney for William Marshall Mauney, Jr. | 22 Dec 2025 | 0002025220 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | POWL | Common Stock | Sale | $995,190 | -3,000 | -40% | $331.73 | 4,451 | 19 Dec 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Includes shares that have a time-based vesting provision. |