| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| MOOK JOSHUA T. | Chief Technology Officer | C/O HYLIION HOLDING CORP., 1202 BMC DRIVE, SUITE 100, CEDAR PARK | /s/ Joshua T. Mook | 29 Aug 2025 | 0002011297 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | HYLN | Common Stock | Tax liability | $2,300 | -1,361 | -0.26% | $1.69 | 519,688 | 27 Aug 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Shares withheld for the payment of a tax liability related to the vesting and distribution of restricted stock units. |