# SELLAS Life Sciences Group, Inc.: filings

SLS · Nasdaq · CIK 1390478 · [Healthcare](/sectors/healthcare.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/sls.md) · [Financials](/companies/sls/financials.md) · [Filings](/companies/sls/filings.md) · [Insiders](/companies/sls/insiders.md)

## Reports and events: 417 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 367, 8-K 290, 10-Q 53, CORRESP 45, 3 36, 424B5 36, UPLOAD 31, SC 13G/A 30, EFFECT 28, DEFA14A 26, S-3 24, DEF 14A 22, 424B3 21, SC 13G 20, 10-K 18, S-8 15, 8-K/A 14, 425 13, CT ORDER 12, 4/A 10, PRE 14A 10, S-3/A 8, 10-K/A 6, ARS 6, D 5, POS EX 5, SCHEDULE 13G/A 5, S-1/A 4, SCHEDULE 13G 4, 424B2 3, S-1 3, S-4/A 3, SC 13D/A 3, 10-Q/A 2, 424B4 2, FWP 2, NT 10-K 2, POS AM 2, RW 2, S-3MEF 2, SC 13D 2, 5 1, DEFR14A 1, DEL AM 1, NO ACT 1, NT 10-Q 1, PRER14A 1, S-1MEF 1, S-3ASR 1, S-4 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-08-11 | 16:07 ET | [8-K](/filings/0001390478-26-000013.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-26-000013 |
| 2026-08-11 | 16:01 ET | [10-Q](/filings/0001390478-26-000012.md) | Quarterly report, period 2026-06-30 | 0001390478-26-000012 |
| 2026-07-27 | 16:35 ET | [8-K](/filings/0001104659-26-087110.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-087110 |
| 2026-06-25 | 08:30 ET | [8-K](/filings/0001104659-26-077556.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001104659-26-077556 |
| 2026-06-18 | 16:30 ET | [8-K](/filings/0001104659-26-075775.md) | 5.07 Shareholder vote results | 0001104659-26-075775 |
| 2026-06-02 | 08:30 ET | [8-K](/filings/0001104659-26-069251.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-069251 |
| 2026-05-12 | 16:07 ET | [8-K](/filings/0001390478-26-000009.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-26-000009 |
| 2026-05-12 | 16:01 ET | [10-Q](/filings/0001390478-26-000008.md) | Quarterly report, period 2026-03-31 | 0001390478-26-000008 |
| 2026-04-23 | 16:09 ET | [DEF 14A](/filings/0001104659-26-047693.md) | Proxy statement, period 2026-06-16 | 0001104659-26-047693 |
| 2026-03-19 | 16:08 ET | [8-K](/filings/0001390478-26-000004.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-26-000004 |
| 2026-03-19 | 16:00 ET | [10-K](/filings/0001390478-26-000003.md) | Annual report, period 2025-12-31 | 0001390478-26-000003 |
| 2026-03-11 | 16:06 ET | [8-K](/filings/0001104659-26-026384.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-026384 |
| 2026-01-08 | 08:30 ET | [8-K](/filings/0001104659-26-001957.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-001957 |
| 2025-11-12 | 16:08 ET | [8-K](/filings/0001390478-25-000021.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-25-000021 |
| 2025-11-12 | 16:01 ET | [10-Q](/filings/0001390478-25-000020.md) | Quarterly report, period 2025-09-30 | 0001390478-25-000020 |
| 2025-10-27 | 08:35 ET | [8-K](/filings/0001104659-25-102345.md) | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-25-102345 |
| 2025-10-03 | 16:05 ET | [8-K](/filings/0001104659-25-096643.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001104659-25-096643 |
| 2025-09-11 | 08:40 ET | [8-K](/filings/0001104659-25-089272.md) | 1.01 Entry into a material agreement; 3.02 Unregistered sale of equity; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-25-089272 |
| 2025-08-12 | 16:07 ET | [8-K](/filings/0001390478-25-000017.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-25-000017 |
| 2025-08-12 | 16:00 ET | [10-Q](/filings/0001390478-25-000016.md) | Quarterly report, period 2025-06-30 | 0001390478-25-000016 |
| 2025-06-18 | 17:11 ET | [8-K](/filings/0001104659-25-060704.md) | 5.07 Shareholder vote results | 0001104659-25-060704 |
| 2025-06-06 | 16:05 ET | [8-K](/filings/0001104659-25-057308.md) | 4.01 Change of auditor; 9.01 Financial statements and exhibits | 0001104659-25-057308 |
| 2025-05-13 | 16:07 ET | [8-K](/filings/0001390478-25-000009.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-25-000009 |
| 2025-05-13 | 16:01 ET | [10-Q](/filings/0001390478-25-000008.md) | Quarterly report, period 2025-03-31 | 0001390478-25-000008 |
| 2025-04-23 | 16:30 ET | [DEF 14A](/filings/0001104659-25-038039.md) | Proxy statement, period 2025-06-17 | 0001104659-25-038039 |
| 2025-03-20 | 16:07 ET | [8-K](/filings/0001390478-25-000004.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-25-000004 |
| 2025-03-20 | 16:01 ET | [10-K](/filings/0001390478-25-000003.md) | Annual report, period 2024-12-31 | 0001390478-25-000003 |
| 2025-01-29 | 09:14 ET | [8-K](/filings/0001104659-25-007049.md) | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-25-007049 |
| 2025-01-23 | 16:42 ET | [8-K](/filings/0001104659-25-005648.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-25-005648 |
| 2025-01-16 | 16:11 ET | [8-K](/filings/0001104659-25-004107.md) | 5.02 Departure or appointment of officers or directors | 0001104659-25-004107 |
| 2024-12-10 | 16:45 ET | [8-K](/filings/0001104659-24-127231.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-24-127231 |
| 2024-11-13 | 16:17 ET | [8-K](/filings/0001390478-24-000022.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-24-000022 |
| 2024-11-13 | 16:01 ET | [10-Q](/filings/0001390478-24-000021.md) | Quarterly report, period 2024-09-30 | 0001390478-24-000021 |
| 2024-10-04 | 16:06 ET | [8-K](/filings/0001104659-24-106261.md) | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001104659-24-106261 |
| 2024-08-13 | 16:12 ET | [8-K](/filings/0001390478-24-000016.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-24-000016 |
| 2024-08-13 | 16:01 ET | [10-Q](/filings/0001390478-24-000015.md) | Quarterly report, period 2024-06-30 | 0001390478-24-000015 |
| 2024-08-01 | 16:42 ET | [8-K](/filings/0001104659-24-084952.md) | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-24-084952 |
| 2024-06-21 | 16:26 ET | [8-K](/filings/0001104659-24-073957.md) | 5.07 Shareholder vote results | 0001104659-24-073957 |
| 2024-05-14 | 16:06 ET | [8-K](/filings/0001390478-24-000011.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-24-000011 |
| 2024-05-14 | 16:01 ET | [10-Q](/filings/0001390478-24-000010.md) | Quarterly report, period 2024-03-31 | 0001390478-24-000010 |
| 2024-04-29 | 16:05 ET | [DEF 14A](/filings/0001104659-24-054004.md) | Proxy statement, period 2024-06-20 | 0001104659-24-054004 |
| 2024-03-28 | 16:08 ET | [8-K](/filings/0001390478-24-000005.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001390478-24-000005 |
| 2024-03-28 | 16:01 ET | [10-K](/filings/0001390478-24-000004.md) | Annual report, period 2023-12-31 | 0001390478-24-000004 |
| 2024-03-28 | 08:45 ET | [8-K](/filings/0001104659-24-040176.md) | 8.01 Other events | 0001104659-24-040176 |
| 2024-03-15 | 16:29 ET | [8-K](/filings/0001104659-24-035028.md) | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-24-035028 |
| 2024-03-11 | 16:05 ET | [8-K](/filings/0001104659-24-032964.md) | 8.01 Other events | 0001104659-24-032964 |
| 2024-03-08 | 16:05 ET | [8-K](/filings/0001104659-24-032384.md) | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-24-032384 |
| 2024-03-05 | 16:01 ET | [8-K](/filings/0001104659-24-030997.md) | 8.01 Other events | 0001104659-24-030997 |
| 2024-02-16 | 16:05 ET | [8-K](/filings/0001104659-24-024898.md) | 3.01 Delisting notice | 0001104659-24-024898 |
| 2024-01-08 | 17:07 ET | [8-K](/filings/0001104659-24-002295.md) | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-24-002295 |

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Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 27, 2026, 17:29 ET. No prices; not investment advice.