| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Yuen Maggie | Chief Financial Officer | ONE PENUMBRA PLACE, ALAMEDA | /s/ Johanna Roberts, as attorney-in-fact for Maggie Yuen | 17 Dec 2025 | 0001796057 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | PEN | Common Stock | Tax liability | $174,670 | -565 | -3.4% | $309.15 | 16,006 | 15 Dec 2025 | Direct | F1, F2, F3 |
| Id | Content |
|---|---|
| F1 | Shares were withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person. |
| F2 | A portion of these shares is subject to vesting. |
| F3 | Includes 15 shares purchased by the Reporting Person under the Issuer's Employee Stock Purchase Plan on November 19, 2025. |