| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Akin Okan I. | Senior Executive VP, CRO | 9 GREENWAY PLAZA, SUITE 110, HOUSTON | /s/ Justin M. Long, attorney-in-fact | 03 Oct 2025 | 0001764485 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STEL | Common Stock | Tax liability | $43,890 | -1,463 | -1.8% | $30.00 | 81,500 | 01 Oct 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Represents shares withheld to satisfy tax liability for 10/01/2025 vesting of restricted shares of Common Stock previously reported. |