{"cik":"0001390478","ticker":"SLS","name":"SELLAS Life Sciences Group, Inc.","sic_code":"2834","sic_description":"Pharmaceutical Preparations","exchange":"Nasdaq","state_of_incorporation":"DE","fiscal_year_end":"1231","first_filing_date":"2026-05-12","last_filing_date":"2026-08-11","url":"/sec/cik-0001390478","insider_summary":{"total_transactions":1,"unique_insiders":1,"latest_transaction":"2026-06-16"},"recent_filings":[{"accession_number":"0001390478-26-000013","form_type":"8-K","form_type_family":"current","doc_date":"2026-08-11","title":"8-K — SELLAS Life Sciences Group, Inc. — 2026-08-11","url_slug":"/sec/cik-0001390478/8-k/0001390478-26-000013","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001390478-26-000013-index.html"},{"accession_number":"0001390478-26-000012","form_type":"10-Q","form_type_family":"quarterly","doc_date":"2026-08-11","title":"10-Q — SELLAS Life Sciences Group, Inc. — 2026-08-11","url_slug":"/sec/cik-0001390478/10-q/0001390478-26-000012","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001390478-26-000012-index.html"},{"accession_number":"0000093751-26-000539","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-08-07","title":"SCHEDULE 13G — SELLAS Life Sciences Group, Inc. — 2026-08-07","url_slug":"/sec/cik-0001390478/schedule-13g/0000093751-26-000539","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0000093751-26-000539-index.html"},{"accession_number":"0002100119-26-001315","form_type":"SCHEDULE 13G","form_type_family":"other","doc_date":"2026-07-31","title":"SCHEDULE 13G — SELLAS Life Sciences Group, Inc. — 2026-07-31","url_slug":"/sec/cik-0001390478/schedule-13g/0002100119-26-001315","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0002100119-26-001315-index.html"},{"accession_number":"0001104659-26-087110","form_type":"8-K","form_type_family":"current","doc_date":"2026-07-27","title":"8-K — SELLAS Life Sciences Group, Inc. — 2026-07-27","url_slug":"/sec/cik-0001390478/8-k/0001104659-26-087110","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001104659-26-087110-index.html"},{"accession_number":"0001104659-26-077556","form_type":"8-K","form_type_family":"current","doc_date":"2026-06-25","title":"8-K — SELLAS Life Sciences Group, Inc. — 2026-06-25","url_slug":"/sec/cik-0001390478/8-k/0001104659-26-077556","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001104659-26-077556-index.html"},{"accession_number":"0001104659-26-075775","form_type":"8-K","form_type_family":"current","doc_date":"2026-06-18","title":"8-K — SELLAS Life Sciences Group, Inc. — 2026-06-18","url_slug":"/sec/cik-0001390478/8-k/0001104659-26-075775","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001104659-26-075775-index.html"},{"accession_number":"0001104659-26-075773","form_type":"4","form_type_family":"insider","doc_date":"2026-06-18","title":"4 — SELLAS Life Sciences Group, Inc. — 2026-06-18","url_slug":"/sec/cik-0001390478/4/0001104659-26-075773","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001104659-26-075773-index.html"},{"accession_number":"0001104659-26-074599","form_type":"S-8","form_type_family":"other","doc_date":"2026-06-16","title":"S-8 — SELLAS Life Sciences Group, Inc. — 2026-06-16","url_slug":"/sec/cik-0001390478/s-8/0001104659-26-074599","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001104659-26-074599-index.html"},{"accession_number":"0001104659-26-069251","form_type":"8-K","form_type_family":"current","doc_date":"2026-06-02","title":"8-K — SELLAS Life Sciences Group, Inc. — 2026-06-02","url_slug":"/sec/cik-0001390478/8-k/0001104659-26-069251","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001104659-26-069251-index.html"},{"accession_number":"0001390478-26-000009","form_type":"8-K","form_type_family":"current","doc_date":"2026-05-12","title":"8-K — SELLAS Life Sciences Group, Inc. — 2026-05-12","url_slug":"/sec/cik-0001390478/8-k/0001390478-26-000009","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001390478-26-000009-index.html"},{"accession_number":"0001390478-26-000008","form_type":"10-Q","form_type_family":"quarterly","doc_date":"2026-05-12","title":"10-Q — SELLAS Life Sciences Group, Inc. — 2026-05-12","url_slug":"/sec/cik-0001390478/10-q/0001390478-26-000008","edgar_url":"https://www.sec.gov/Archives/edgar/data/1390478/0001390478-26-000008-index.html"}],"related_endpoints":{"profile":"/sec/SLS/profile","timeline":"/sec/SLS/timeline","peers":"/sec/SLS/peers","insider_pulse":"/sec/SLS/insider-pulse","insider_summary":"/sec/SLS/insider-summary","insider_transactions":"/sec/SLS/insider-transactions","form144":"/sec/SLS/form144","holdings_as_filer":"/sec/SLS/holdings","financial_facts":"/sec/SLS/financial-facts","derivatives":"/sec/SLS/derivatives","officers":"/sec/SLS/officers","insider_network":"/sec/SLS/insider-network","risk_flags":"/sec/SLS/risk-flags","filings":"/sec/SLS/filings","cross_topic_dossier":"/api/v1/dossier?ticker=SLS"}}