| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| NANGOLO CHARLOTTE NANGULOSHI | Director | 6608 N. WESTERN AVE, SUITE 466, NICHOLS HILLS | /s/ Udaychandra Devasper, as attorney in fact for Charlotte Nanguloshi Nangolo | 17 Dec 2025 | 0002027948 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SDST | Common Stock | Sale | $20,691 | -6,020 | -13% | $3.44 | 40,002 | 16 Dec 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at a range of $3.40 - $3.46, inclusive. The undersigned undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. |