| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Retzloff Steven F. | Executive Chairman, Director | 9 GREENWAY PLAZA, SUITE 110, HOUSTON | /s/ Justin M. Long, attorney-in-fact | 17 Mar 2026 | 0001183121 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STEL | Common Stock | Tax liability | -1,181 | -0.86% | $35.51* | 136,446 | 15 Mar 2026 | Direct | F1 | |
| holding | STEL | Common Stock | 25,531 | 15 Mar 2026 | By Retzloff Industries, Inc. | ||||||
| holding | STEL | Common Stock | 378,240 | 15 Mar 2026 | By Retzloff Holdings, LTD. | ||||||
| holding | STEL | Common Stock | 12,598 | 15 Mar 2026 | By SF Retzloff Family Limited Partnership, LTD. |
| Id | Content |
|---|---|
| F1 | Represents shares withheld to satisfy tax liability for vesting of restricted shares of Common Stock previously reported. |