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 |
|---|---|---|---|
| EFFECT | Filing | Nov 25, 2025 | — |
| CORRESP | Letter to the SEC | Nov 21, 2025 | — |
| EFFECT | Filing | May 1, 2024 | — |
| EFFECT | Filing | May 1, 2024 | — |
| CORRESP | Letter to the SEC | Apr 29, 2024 | — |
| CORRESP | Letter to the SEC | Apr 29, 2024 | — |
| UPLOAD | Letter from the SEC | Apr 2, 2024 | — |
| UPLOAD | Letter from the SEC | Apr 2, 2024 | — |
| D | Filing | Mar 29, 2024 | — |
| EFFECT | Filing | Apr 29, 2021 | — |
| CORRESP | Letter to the SEC | Apr 27, 2021 | — |
| UPLOAD | Letter from the SEC | Apr 21, 2021 | — |
| D | Filing | Aug 31, 2020 | — |
| EFFECT | Filing | Aug 24, 2020 | — |
| UPLOAD | Letter from the SEC | Aug 21, 2020 | — |
| CORRESP | Letter to the SEC | Aug 21, 2020 | — |
| EFFECT | Filing | Jun 11, 2020 | — |
| CORRESP | Letter to the SEC | Jun 9, 2020 | — |
| UPLOAD | Letter from the SEC | Jun 5, 2020 | — |
| EFFECT | Filing | Oct 11, 2019 | — |
| CORRESP | Letter to the SEC | Oct 9, 2019 | — |
| CORRESP | Letter to the SEC | Oct 4, 2019 | — |
| UPLOAD | Letter from the SEC | Oct 1, 2019 | — |
| EFFECT | Filing | Jun 13, 2019 | — |
| CORRESP | Letter to the SEC | Jun 13, 2019 | — |
| CORRESP | Letter to the SEC | Jun 13, 2019 | — |
| UPLOAD | Letter from the SEC | May 29, 2019 | — |
| EFFECT | Filing | Jul 26, 2018 | — |
| UPLOAD | Letter from the SEC | Jul 26, 2018 | — |
| CORRESP | Letter to the SEC | Jul 25, 2018 | — |
| POS EX | Post-effective amendment no. 1 to form s-1 | Jul 12, 2018 | — |
| EFFECT | Filing | Jul 11, 2018 | — |
| CORRESP | Letter to the SEC | Jul 11, 2018 | — |
| CORRESP | Letter to the SEC | Jul 11, 2018 | — |
| CORRESP | Letter to the SEC | Jun 28, 2018 | — |
| CORRESP | Letter to the SEC | Jun 26, 2018 | — |
| CORRESP | Letter to the SEC | Jun 26, 2018 | — |
| UPLOAD | Letter from the SEC | Jun 1, 2018 | — |
| DEL AM | Filing | May 24, 2018 | — |
| EFFECT | Filing | May 21, 2018 | — |
| UPLOAD | Letter from the SEC | May 17, 2018 | — |
| CORRESP | Letter to the SEC | May 17, 2018 | — |
| NT 10-K | Filing | Apr 2, 2018 | Dec 31, 2017 |
| 425 | Form 8-k | Dec 14, 2017 | — |
| 425 | Filing | Dec 11, 2017 | — |
| 425 | Filing | Dec 8, 2017 | — |
| 425 | Filing | Dec 6, 2017 | — |
| 425 | Filing | Nov 30, 2017 | — |
| 425 | Filing | Nov 9, 2017 | — |
| CT ORDER | Filing | Nov 8, 2017 | — |
| EFFECT | Filing | Nov 6, 2017 | — |
| CORRESP | Letter to the SEC | Nov 6, 2017 | — |
| UPLOAD | Letter from the SEC | Nov 6, 2017 | — |
| CORRESP | Letter to the SEC | Nov 6, 2017 | — |
| CORRESP | Letter to the SEC | Nov 6, 2017 | — |
| UPLOAD | Letter from the SEC | Nov 3, 2017 | — |
| CORRESP | Letter to the SEC | Oct 27, 2017 | — |
| UPLOAD | Letter from the SEC | Oct 23, 2017 | — |
| 425 | Form 8-k | Oct 2, 2017 | — |
| 425 | Form 8-k | Sep 29, 2017 | — |
| 425 | 8-k | Sep 14, 2017 | — |
| 425 | Filing | Sep 11, 2017 | — |
| 425 | Filing | Aug 14, 2017 | — |
| NT 10-Q | Filing | Aug 9, 2017 | Jun 30, 2017 |
| 425 | Filing | Aug 8, 2017 | — |
| 425 | 8-k | Aug 8, 2017 | — |
| EFFECT | Filing | Jul 18, 2017 | — |
| EFFECT | Filing | Oct 19, 2016 | — |
| CORRESP | Letter to the SEC | Oct 17, 2016 | — |
| CORRESP | Letter to the SEC | Oct 14, 2016 | — |
| UPLOAD | Letter from the SEC | Oct 14, 2016 | — |
| EFFECT | Filing | Oct 11, 2016 | — |
| CORRESP | Letter to the SEC | Oct 6, 2016 | — |
| CORRESP | Letter to the SEC | Sep 28, 2016 | — |
| UPLOAD | Letter from the SEC | Sep 21, 2016 | — |
| UPLOAD | Letter from the SEC | Sep 20, 2016 | — |
| PRER14A | Filing | Sep 19, 2016 | — |
| CORRESP | Letter to the SEC | Sep 19, 2016 | — |
| UPLOAD | Letter from the SEC | Sep 19, 2016 | — |
| EFFECT | Filing | Aug 5, 2016 | — |
| UPLOAD | Letter from the SEC | Aug 4, 2016 | — |
| CORRESP | Letter to the SEC | Aug 4, 2016 | — |
| D | Filing | Jul 26, 2016 | — |
| NO ACT | Auto-generated paper document | Jun 6, 2016 | May 18, 2016 |
| D | Filing | May 24, 2016 | — |
| CT ORDER | Filing | Apr 29, 2016 | — |
| POS EX | Filing | Jan 5, 2016 | — |
| POS EX | Filing | Jan 5, 2016 | — |
| POS EX | Filing | Dec 31, 2015 | — |
| POS EX | Filing | Dec 31, 2015 | — |
| CORRESP | Letter to the SEC | Dec 30, 2015 | — |
| CORRESP | Letter to the SEC | Dec 30, 2015 | — |
| EFFECT | Filing | Dec 22, 2015 | — |
| EFFECT | Filing | Dec 22, 2015 | — |
| CORRESP | Letter to the SEC | Dec 18, 2015 | — |
| CORRESP | Letter to the SEC | Dec 18, 2015 | — |
| CT ORDER | Filing | Dec 17, 2015 | — |
| UPLOAD | Letter from the SEC | Dec 16, 2015 | — |
| UPLOAD | Letter from the SEC | Dec 16, 2015 | — |
| EFFECT | Filing | Nov 20, 2014 | — |
| CORRESP | Letter to the SEC | Nov 19, 2014 | — |
| CORRESP | Letter to the SEC | Oct 31, 2014 | — |
| UPLOAD | Letter from the SEC | Oct 31, 2014 | — |
| CT ORDER | Filing | Oct 10, 2014 | — |
| EFFECT | Filing | May 15, 2014 | — |
| CORRESP | Letter to the SEC | May 13, 2014 | — |
| CT ORDER | Filing | May 12, 2014 | — |
| CORRESP | Letter to the SEC | May 2, 2014 | — |
| DEFR14A | Filing | May 1, 2014 | — |
| UPLOAD | Letter from the SEC | Apr 23, 2014 | — |
| UPLOAD | Letter from the SEC | Apr 18, 2014 | — |
| CORRESP | Letter to the SEC | Mar 13, 2014 | — |
| UPLOAD | Letter from the SEC | Mar 11, 2014 | — |
| CORRESP | Letter to the SEC | Jan 29, 2014 | — |
| D | Filing | Jan 22, 2014 | — |
| UPLOAD | Letter from the SEC | Jan 15, 2014 | — |
| CORRESP | Letter to the SEC | Dec 26, 2013 | — |
| UPLOAD | Letter from the SEC | Dec 13, 2013 | — |
| EFFECT | Filing | Aug 15, 2013 | — |
| CORRESP | Letter to the SEC | Aug 13, 2013 | — |
| EFFECT | Filing | Jun 12, 2013 | — |
| CORRESP | Letter to the SEC | Jun 10, 2013 | — |
| CT ORDER | Filing | Jun 6, 2013 | — |
| CT ORDER | Filing | Jun 6, 2013 | — |
| UPLOAD | Letter from the SEC | Jun 3, 2013 | — |
| UPLOAD | Letter from the SEC | Jun 3, 2013 | — |
| EFFECT | Filing | Jul 13, 2012 | — |
| EFFECT | Filing | May 29, 2012 | — |
| RW | Form rw | May 23, 2012 | — |
| RW | Filing | May 14, 2012 | — |
| CT ORDER | Filing | Apr 6, 2012 | — |
| CT ORDER | Filing | Nov 4, 2011 | — |
| CT ORDER | Filing | Aug 31, 2011 | — |
| EFFECT | Filing | Jun 15, 2011 | — |
Showing 134 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.
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.