SELLAS Life Sciences Group, Inc. SEC filings SLS
SELLAS Life Sciences Group, Inc. has 1,002 filings in SEC EDGAR's recent list, going back to Apr 21, 2011. Its latest annual report, Form ARS, was filed on Apr 23, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 11, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Aug 11, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 27, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jun 18, 2026 | Jun 16, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 24, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2026 | — |
| 4 | Insider transaction | Jan 9, 2026 | Jan 7, 2026 |
| 4 | Insider transaction | Jan 9, 2026 | Jan 7, 2026 |
| 4 | Insider transaction | Jan 9, 2026 | Jan 7, 2026 |
| 4 | Insider transaction | Jan 9, 2026 | Jan 7, 2026 |
| 4 | Insider transaction | Jan 9, 2026 | Jan 7, 2026 |
| 4 | Insider transaction | Jan 9, 2026 | Jan 7, 2026 |
| 4 | Insider transaction | Jan 9, 2026 | Jan 7, 2026 |
| 4 | Insider transaction | Dec 5, 2025 | Dec 3, 2025 |
| 4 | Insider transaction | Dec 5, 2025 | Dec 3, 2025 |
| 4 | Insider transaction | Dec 5, 2025 | Dec 3, 2025 |
| 4 | Insider transaction | Nov 21, 2025 | Nov 19, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 17, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 29, 2025 | — |
| 4 | Insider transaction | Jun 13, 2025 | Jun 12, 2025 |
| 4 | Insider transaction | Jun 2, 2025 | May 30, 2025 |
| 4 | Insider transaction | May 22, 2025 | May 22, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 15, 2025 | — |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 4 | Insider transaction | Dec 5, 2024 | Dec 4, 2024 |
| 4 | Insider transaction | Dec 5, 2024 | Dec 4, 2024 |
| 4 | Insider transaction | Dec 5, 2024 | Dec 4, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 8, 2024 | — |
| 3 | Initial insider ownership | Jun 27, 2024 | Jun 20, 2024 |
| SC 13G | Ownership over 5% (passive) | Feb 7, 2024 | — |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Jan 25, 2024 | Jan 22, 2024 |
| 4 | Insider transaction | Dec 8, 2023 | Dec 6, 2023 |
| 4 | Insider transaction | Dec 8, 2023 | Dec 6, 2023 |
| 4 | Insider transaction | Dec 8, 2023 | Dec 6, 2023 |
| 4 | Insider transaction | Dec 8, 2023 | Dec 6, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Feb 3, 2023 | Feb 2, 2023 |
| 4 | Insider transaction | Dec 5, 2022 | Dec 5, 2022 |
| 4 | Insider transaction | Dec 5, 2022 | Dec 5, 2022 |
| 4 | Insider transaction | Dec 5, 2022 | Dec 5, 2022 |
| 4 | Insider transaction | Aug 16, 2022 | Aug 13, 2022 |
| 3 | Initial insider ownership | Aug 16, 2022 | Aug 13, 2022 |
| 4 | Insider transaction | Mar 15, 2022 | Mar 14, 2022 |
| 3 | Initial insider ownership | Mar 14, 2022 | Mar 14, 2022 |
| 4 | Insider transaction | Feb 1, 2022 | Jan 31, 2022 |
| 4 | Insider transaction | Feb 1, 2022 | Jan 31, 2022 |
| 4 | Insider transaction | Feb 1, 2022 | Jan 31, 2022 |
| 4 | Insider transaction | Feb 1, 2022 | Jan 31, 2022 |
| 4 | Insider transaction | Feb 1, 2022 | Jan 31, 2022 |
| 4 | Insider transaction | Feb 1, 2022 | Jan 31, 2022 |
| 4 | Insider transaction | Feb 1, 2022 | Jan 31, 2022 |
| 4 | Insider transaction | Dec 3, 2021 | Dec 2, 2021 |
| 4 | Insider transaction | Dec 3, 2021 | Dec 2, 2021 |
| 4 | Insider transaction | Dec 3, 2021 | Dec 2, 2021 |
| 4/A | Ownership document | Dec 3, 2021 | Mar 12, 2020 |
| 4/A | Ownership document | Dec 3, 2021 | Mar 4, 2021 |
| 4/A | Ownership document | Dec 3, 2021 | Mar 4, 2021 |
| 4 | Insider transaction | Mar 8, 2021 | Mar 4, 2021 |
| 4 | Insider transaction | Mar 8, 2021 | Mar 4, 2021 |
| 4 | Insider transaction | Mar 8, 2021 | Mar 4, 2021 |
| 4 | Insider transaction | Mar 8, 2021 | Mar 4, 2021 |
| 4 | Insider transaction | Mar 8, 2021 | Mar 4, 2021 |
| 4 | Insider transaction | Mar 8, 2021 | Mar 4, 2021 |
| 4 | Insider transaction | Mar 8, 2021 | Mar 4, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Dec 14, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Sep 21, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Aug 25, 2020 | — |
| 4 | Insider transaction | Mar 16, 2020 | Mar 12, 2020 |
| 4 | Insider transaction | Mar 16, 2020 | Mar 12, 2020 |
| 4 | Insider transaction | Mar 16, 2020 | Mar 12, 2020 |
| 4 | Insider transaction | Mar 16, 2020 | Mar 12, 2020 |
| 4 | Insider transaction | Mar 16, 2020 | Mar 12, 2020 |
| 4 | Insider transaction | Mar 16, 2020 | Mar 12, 2020 |
| 4 | Insider transaction | Mar 16, 2020 | Mar 12, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Jan 17, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Jun 24, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jun 24, 2019 | — |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| 4 | Insider transaction | Mar 18, 2019 | Mar 14, 2019 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Feb 12, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 17, 2019 | — |
| 4 | Insider transaction | Jan 3, 2019 | Dec 31, 2018 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 3, 2019 | — |
| 3 | Initial insider ownership | Dec 19, 2018 | Dec 17, 2018 |
| SC 13D/A | Amended ownership over 5% (active) | Oct 10, 2018 | — |
| 4 | Insider transaction | Sep 26, 2018 | Sep 24, 2018 |
| SC 13G | Ownership over 5% (passive) | Jul 23, 2018 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jul 23, 2018 | — |
| SC 13G | Ownership over 5% (passive) | Jul 23, 2018 | — |
| SC 13G | Ownership over 5% (passive) | Jul 18, 2018 | — |
| 4 | Insider transaction | Jun 13, 2018 | Jun 12, 2018 |
| 4 | Insider transaction | Jun 13, 2018 | Jun 12, 2018 |
| 4 | Insider transaction | Jun 13, 2018 | Jun 12, 2018 |
| 4 | Insider transaction | Jun 13, 2018 | Jun 12, 2018 |
| 4 | Insider transaction | Jun 13, 2018 | Jun 12, 2018 |
| 4 | Insider transaction | Jun 13, 2018 | Jun 12, 2018 |
| 4 | Insider transaction | Apr 24, 2018 | Apr 20, 2018 |
| 3 | Initial insider ownership | Apr 24, 2018 | Apr 20, 2018 |
| 4/A | Form 4/a submission | Mar 16, 2018 | Dec 29, 2017 |
| 4 | Insider transaction | Mar 16, 2018 | Mar 14, 2018 |
| 3 | Initial insider ownership | Mar 16, 2018 | Mar 14, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 13, 2018 |
| SC 13D/A | Amended ownership over 5% (active) | Mar 13, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2018 | — |
| SC 13D | Ownership over 5% (active) | Jan 8, 2018 | — |
| SC 13D | Ownership over 5% (active) | Jan 8, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 8, 2018 | — |
| 4 | Insider transaction | Dec 29, 2017 | Dec 29, 2017 |
| 4 | Insider transaction | Dec 29, 2017 | Dec 29, 2017 |
| 4 | Insider transaction | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 3 | Initial insider ownership | Dec 29, 2017 | Dec 29, 2017 |
| 4 | Insider transaction | Oct 10, 2017 | Oct 10, 2017 |
| 4 | Insider transaction | Oct 10, 2017 | Oct 10, 2017 |
| 4 | Insider transaction | Oct 10, 2017 | Oct 10, 2017 |
| 4 | Insider transaction | Oct 10, 2017 | Oct 10, 2017 |
| 4 | Insider transaction | Oct 10, 2017 | Oct 10, 2017 |
| 4 | Insider transaction | Oct 10, 2017 | Oct 10, 2017 |
| 4 | Insider transaction | Oct 10, 2017 | Oct 10, 2017 |
| 4 | Insider transaction | Jul 6, 2017 | Jun 28, 2017 |
| 4 | Insider transaction | Jul 6, 2017 | Jun 28, 2017 |
| 4 | Insider transaction | Jul 6, 2017 | Jun 28, 2017 |
| 4 | Insider transaction | Jul 6, 2017 | Jun 28, 2017 |
| 4 | Insider transaction | Jul 6, 2017 | Jun 28, 2017 |
| 4 | Insider transaction | Jul 6, 2017 | Jun 28, 2017 |
| 4 | Insider transaction | Jul 6, 2017 | Jun 28, 2017 |
| 4 | Insider transaction | Jun 22, 2017 | Jun 20, 2017 |
| 4 | Insider transaction | Apr 12, 2017 | Apr 10, 2017 |
| 4 | Insider transaction | Apr 12, 2017 | Apr 10, 2017 |
| 4 | Insider transaction | Apr 12, 2017 | Apr 10, 2017 |
| 4 | Insider transaction | Apr 12, 2017 | Apr 10, 2017 |
| 4 | Insider transaction | Apr 12, 2017 | Apr 10, 2017 |
| 4 | Insider transaction | Apr 12, 2017 | Apr 10, 2017 |
| 4 | Insider transaction | Apr 12, 2017 | Apr 10, 2017 |
| SC 13G/A | Amended ownership over 5% (passive) | Mar 9, 2017 | — |
| SC 13G | Ownership over 5% (passive) | Feb 17, 2017 | — |
| SC 13G | Ownership over 5% (passive) | Feb 17, 2017 | — |
| SC 13G | Ownership over 5% (passive) | Feb 15, 2017 | — |
| 4 | Insider transaction | Feb 10, 2017 | Feb 8, 2017 |
| 3 | Initial insider ownership | Feb 10, 2017 | Feb 8, 2017 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2017 | — |
| 4 | Insider transaction | Feb 7, 2017 | Feb 6, 2017 |
| SC 13G | Ownership over 5% (passive) | Jan 30, 2017 | — |
| 4 | Insider transaction | Jan 24, 2017 | Jan 20, 2017 |
| 4 | Insider transaction | Jan 24, 2017 | Jan 20, 2017 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- SLS (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- New York, NY
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1390478
- Former names
- GALENA BIOPHARMA, INC. (until Dec 15, 2017); Galena Biopharma, Inc. (until Dec 15, 2017); RXI PHARMACEUTICALS CORP (until Sep 21, 2011)
Other Pharmaceutical Preparations companies
- ELI LILLY & Co LLY
- Johnson & Johnson JNJ
- AbbVie Inc. ABBV
- Merck & Co., Inc. MRK
- Novartis AG NVS
- Astrazeneca PLC AZN
- Abbott Laboratories ABT
- Novo Nordisk A S NVO
Source: SEC EDGAR filings. This is company-reported data, not investment advice.