| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Kalin Katherine Bach | Director | C/O SELLAS LIFE SCIENCES GROUP, INC., 7, TIMES SQUARE, SUITE 2503, NEW YORK | /s/ Kostantinos Skordalos, Power of Attorney For: Katherine Bach Kalin | 22 May 2025 | 0001832671 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SLS | Common Stock | Purchase | $36,000 | +20,000 | +95% | $1.80 | 41,000 | 22 May 2025 | Direct |