| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| VAN NOSTRAND ROBERT L | Director | C/O SELLAS LIFE SCIENCES GROUP, INC.,, 7 TIMES SQUARE, SUITE 2503, NEW YORK | /s/ Daniel Bagliebter, Power of Attorney For: Robert L. Van Nostrand | 13 Jun 2025 | 0001225198 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SLS | Common Stock | Purchase | $14,800 | +10,000 | +96% | $1.48 | 20,400 | 12 Jun 2025 | Direct |