| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| West Joe F | Senior Executive VP, CCO | 9 GREENWAY PLAZA, SUITE 110, HOUSTON | /s/ Justin M. Long, attorney-in-fact | 05 Jan 2026 | 0001720452 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STEL | Common Stock | Tax liability | $9,746 | -315 | -0.32% | $30.94 | 96,829 | 31 Dec 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Represents shares withheld to satisfy tax liability for vesting of restricted shares of Common Stock previously reported. |