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 |
|---|---|---|---|
| S-8 | Employee stock plan registration | Jun 16, 2026 | — |
| S-3ASR | Automatic shelf registration | Mar 20, 2026 | — |
| 424B5 | Prospectus supplement | Oct 27, 2025 | — |
| S-3 | Shelf registration | Oct 10, 2025 | — |
| S-8 | Employee stock plan registration | Aug 12, 2025 | — |
| 424B5 | Prospectus supplement | Jan 29, 2025 | — |
| 424B5 | Prospectus supplement | Aug 1, 2024 | — |
| S-3/A | Filing | Apr 29, 2024 | — |
| S-3 | Shelf registration | Mar 28, 2024 | — |
| S-3 | Shelf registration | Mar 28, 2024 | — |
| 424B5 | Prospectus supplement | Mar 18, 2024 | — |
| S-8 | Employee stock plan registration | Jan 19, 2024 | — |
| 424B5 | Prospectus supplement | Jan 5, 2024 | — |
| 424B5 | Prospectus supplement | Jan 4, 2024 | — |
| 424B5 | Prospectus supplement | Nov 1, 2023 | — |
| S-8 | Employee stock plan registration | Mar 16, 2023 | — |
| 424B5 | Prospectus supplement | Feb 24, 2023 | — |
| 424B5 | Prospectus supplement | Feb 23, 2023 | — |
| S-8 | Employee stock plan registration | May 12, 2022 | — |
| 424B5 | Prospectus supplement | Apr 1, 2022 | — |
| 424B5 | Prospectus supplement | Mar 31, 2022 | — |
| S-8 | Employee stock plan registration | Aug 13, 2021 | — |
| S-3 | Shelf registration | Apr 16, 2021 | — |
| 424B5 | Prospectus supplement | Dec 14, 2020 | — |
| S-3 | Shelf registration | Aug 14, 2020 | — |
| 424B3 | Prospectus | Jun 11, 2020 | — |
| S-1 | Registration statement | May 29, 2020 | — |
| S-8 | Employee stock plan registration | Mar 13, 2020 | — |
| 424B5 | Prospectus supplement | Jan 10, 2020 | — |
| 424B5 | Prospectus supplement | Oct 30, 2019 | — |
| S-3/A | Filing | Oct 4, 2019 | — |
| S-3 | Shelf registration | Sep 20, 2019 | — |
| 424B4 | Prospectus | Jun 18, 2019 | — |
| S-1/A | Amended registration statement | Jun 13, 2019 | — |
| S-1/A | Amended registration statement | Jun 6, 2019 | — |
| S-1 | Registration statement | May 23, 2019 | — |
| S-8 | Employee stock plan registration | Apr 5, 2019 | — |
| 424B3 | Prospectus | Jul 26, 2018 | — |
| 424B3 | Prospectus | Jul 26, 2018 | — |
| S-3 | Shelf registration | Jul 19, 2018 | — |
| 424B4 | Prospectus | Jul 13, 2018 | — |
| S-1MEF | Form s-1mef | Jul 11, 2018 | — |
| S-1/A | Amended registration statement | Jul 11, 2018 | — |
| S-1/A | Amended registration statement | Jun 26, 2018 | — |
| S-1 | Registration statement | May 23, 2018 | — |
| 424B3 | Prospectus | May 21, 2018 | — |
| S-3 | Shelf registration | May 10, 2018 | — |
| 424B3 | Prospectus | Dec 15, 2017 | — |
| 424B3 | Prospectus | Nov 30, 2017 | — |
| 424B3 | Prospectus | Nov 8, 2017 | — |
| S-4/A | Filing | Nov 6, 2017 | — |
| S-4/A | Filing | Nov 6, 2017 | — |
| S-4/A | Filing | Oct 30, 2017 | — |
| S-4 | Registration for a merger or exchange | Sep 22, 2017 | — |
| POS AM | Filing | Jul 12, 2017 | — |
| 424B5 | Prospectus supplement | Feb 9, 2017 | — |
| 424B2 | Prospectus | Feb 7, 2017 | — |
| 424B3 | Prospectus | Oct 20, 2016 | — |
| S-3/A | Filing | Oct 14, 2016 | — |
| 424B3 | Prospectus | Oct 12, 2016 | — |
| S-3/A | Filing | Oct 11, 2016 | — |
| S-3 | Shelf registration | Sep 30, 2016 | — |
| S-3/A | Filing | Sep 28, 2016 | — |
| S-3 | Shelf registration | Sep 2, 2016 | — |
| S-8 | Employee stock plan registration | Aug 22, 2016 | — |
| S-3 | Shelf registration | Jul 25, 2016 | — |
| 424B5 | Prospectus supplement | Jul 8, 2016 | — |
| S-8 | Employee stock plan registration | Apr 19, 2016 | — |
| 424B5 | Prospectus supplement | Jan 7, 2016 | — |
| 424B2 | Prospectus | Jan 7, 2016 | — |
| 424B3 | Prospectus | Dec 23, 2015 | — |
| 424B3 | Prospectus | Dec 23, 2015 | — |
| 424B3 | Prospectus | Dec 23, 2015 | — |
| 424B3 | Prospectus | Dec 23, 2015 | — |
| S-3 | Shelf registration | Dec 4, 2015 | — |
| S-3 | Shelf registration | Dec 4, 2015 | — |
| 424B5 | Prospectus supplement | Mar 13, 2015 | — |
| 424B2 | Prospectus | Mar 12, 2015 | — |
| 424B5 | Prospectus supplement | Nov 21, 2014 | — |
| 424B5 | Prospectus supplement | Nov 20, 2014 | — |
| S-3/A | Filing | Oct 31, 2014 | — |
| S-3 | Shelf registration | Oct 22, 2014 | — |
| 424B3 | Prospectus | May 21, 2014 | — |
| S-3 | Shelf registration | Apr 14, 2014 | — |
| 424B5 | Prospectus supplement | Sep 13, 2013 | — |
| 424B5 | Prospectus supplement | Sep 12, 2013 | — |
| 424B3 | Prospectus | Aug 16, 2013 | — |
| S-3/A | Amendment no. 1 to form s-3 | Aug 9, 2013 | — |
| S-8 | Employee stock plan registration | Aug 9, 2013 | — |
| S-3 | Shelf registration | May 24, 2013 | — |
| S-3 | Shelf registration | May 24, 2013 | — |
| 424B5 | Prospectus supplement | Dec 18, 2012 | — |
| FWP | Free writing prospectus | Dec 18, 2012 | — |
| 424B5 | Prospectus supplement | Dec 17, 2012 | — |
| S-3MEF | Form s-3 | Dec 17, 2012 | — |
| S-8 | Employee stock plan registration | Aug 14, 2012 | — |
| 424B3 | Prospectus | Jul 17, 2012 | — |
| S-8 | Employee stock plan registration | Jul 9, 2012 | — |
| S-3 | Shelf registration | Jul 2, 2012 | — |
| POS AM | Form s-3 | May 31, 2012 | — |
| 424B3 | Prospectus | May 25, 2012 | — |
| S-3 | Shelf registration | May 22, 2012 | — |
| 424B5 | Prospectus supplement | May 16, 2012 | — |
| 424B5 | Prospectus supplement | Apr 20, 2012 | — |
| S-3 | Shelf registration | Apr 12, 2012 | — |
| 424B5 | Prospectus supplement | Apr 5, 2012 | — |
| 424B5 | Prospectus supplement | Apr 4, 2012 | — |
| 424B5 | Prospectus supplement | Feb 17, 2012 | — |
| 424B5 | Prospectus supplement | Sep 28, 2011 | — |
| S-8 | Employee stock plan registration | Jul 25, 2011 | — |
| 424B3 | Prospectus | Jun 16, 2011 | — |
| S-3/A | Form s-3/a | Jun 13, 2011 | — |
| S-8 | Employee stock plan registration | Jun 10, 2011 | — |
| S-3 | Shelf registration | May 9, 2011 | — |
Showing 114 filings. 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.
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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.