| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Robertson Fred S. | Director | 9 GREENWAY PLAZA, SUITE 110, HOUSTON | /s/ Justin M. Long, attorney-in-fact | 10 Jun 2025 | 0001654248 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STEL | Common Stock | Gift | $0 | -2,660 | -13% | $0.000000 | 18,084 | 21 May 2025 | Direct | F1 |
| transaction | STEL | Common Stock | Gift | $0 | +2,660 | +3.4% | $0.000000 | 80,147 | 21 May 2025 | By Robertson Family Trust | F1, F2 |
| transaction | STEL | Common Stock | Award | $0 | +2,230 | +12% | $0.000000 | 20,314 | 06 Jun 2025 | Direct | F3 |
| Id | Content |
|---|---|
| F1 | Shares transferred to the Robertson Family Trust of which the reporting person serves as trustee. |
| F2 | The reporting person serves as trustee of the Robertson Family Trust. |
| F3 | Represents restricted shares of Common Stock that will vest on May 1, 2026, subject to continued service as a director of the issuer on such date. |