# SELLAS Life Sciences Group, Inc. — DEFA14A

SELLAS Life Sciences Group, Inc. of NEW YORK, NY filed a DEFA14A with the SEC on 2025-04-23. Industry: Pharmaceutical Preparations.

## Filing

- Filed: 2025-04-23
- Form: DEFA14A
- Accession: 0001104659-25-038045
- Registrant: SELLAS Life Sciences Group, Inc.
- CIK: 0001390478
- Industry (SIC): Pharmaceutical Preparations (2834)
- State of incorporation: DE
- Location: NEW YORK, NY

## Documents (3)

| Seq | Type | Description |
| --- | --- | --- |
| 1 | DEFA14A | DEFA14A |
| 2 | GRAPHIC | GRAPHIC |
| 3 | GRAPHIC | GRAPHIC |

## Filing timeline for this registrant (60)

_Showing 12 of 60 filings._

| Filed | Form |
| --- | --- |
| [2026-04-23](https://search.stillhousedata.com/proxy/0001104659-26-047697) | DEFA14A |
| [2026-04-23](https://search.stillhousedata.com/proxy/0001104659-26-047693) | DEF 14A |
| [2025-06-10](https://search.stillhousedata.com/proxy/0001104659-25-058140) | DEFA14A |
| 2025-04-23 | DEFA14A |
| [2025-04-23](https://search.stillhousedata.com/proxy/0001104659-25-038039) | DEF 14A |
| [2024-04-29](https://search.stillhousedata.com/proxy/0001104659-24-054027) | DEFA14A |
| [2024-04-29](https://search.stillhousedata.com/proxy/0001104659-24-054004) | DEF 14A |
| [2023-04-28](https://search.stillhousedata.com/proxy/0001104659-23-052964) | DEFA14A |
| [2023-04-28](https://search.stillhousedata.com/proxy/0001104659-23-052954) | DEF 14A |
| [2023-04-17](https://search.stillhousedata.com/proxy/0001104659-23-046176) | PRE 14A |
| [2022-04-25](https://search.stillhousedata.com/proxy/0001104659-22-049657) | DEFA14A |
| [2022-04-25](https://search.stillhousedata.com/proxy/0001104659-22-049655) | DEF 14A |

## More

- [CIK 1390478 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1390478&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0001104659-25-038045.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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