SELLAS Life Sciences Group, Inc. — Investor Relations & Filings
Filings indexed
1,068
across all filing types
Latest filing
2026-03-27
Major Shareholding Noti…
Country
US
United States of America
Listing
US
SLS
SELLAS Life Sciences Group, Inc. is a late-stage clinical biopharmaceutical company focused on the development of novel therapeutics for a broad range of cancer indications. The company's core activity involves advancing its pipeline of cancer immunotherapies, which are designed to utilize the patient's immune system to combat various malignancies. Its development programs aim to address significant unmet medical needs in oncology by creating new treatment options for cancer patients.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| SCHEDULE 13G/A - SELLAS Life Sciences Group, Inc. (0001390478) (Subject) | 2026-03-27 | English | |
| S-3ASR - SELLAS Life Sciences Group, Inc. (0001390478) (Filer) | 2026-03-20 | English | |
| SCHEDULE 13G/A Filing | 2026-01-30 | English | |
| 4 Filing | 2026-01-09 | English | |
| 4 Filing | 2026-01-09 | English | |
| 4 Filing | 2026-01-09 | English |
Browse filings by year
17 years| ID | Filing | Released | Lang | Actions | |
|---|---|---|---|---|---|
|
2026
11 filings
| |||||
| 33063606 | SCHEDULE 13G/A - SELLAS Life Sciences Group, Inc. (0001390478) (Subject) | 2026-03-27 | English | ||
| 33002560 | S-3ASR - SELLAS Life Sciences Group, Inc. (0001390478) (Filer) | 2026-03-20 | English | ||
| 29310016 | SCHEDULE 13G/A Filing | 2026-01-30 | English | ||
| 29310101 | 4 Filing | 2026-01-09 | English | ||
| 29310097 | 4 Filing | 2026-01-09 | English | ||
| 29310058 | 4 Filing | 2026-01-09 | English | ||
| 29310033 | 4 Filing | 2026-01-09 | English | ||
| 29309973 | 4 Filing | 2026-01-09 | English | ||
| 29309972 | 4 Filing | 2026-01-09 | English | ||
| 29309957 | 4 Filing | 2026-01-09 | English | ||
| 29309997 | 8-K Filing | 2026-01-08 | English | ||
|
2025
4 filings
| |||||
| 12109617 | OWNERSHIP DOCUMENT | 2025-12-05 | English | ||
| 12109618 | OWNERSHIP DOCUMENT | 2025-12-05 | English | ||
| 12109619 | OWNERSHIP DOCUMENT | 2025-12-05 | English | ||
| 12109620 | Regulatory Filings 2025 | 2025-11-26 | English | ||
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SELLAS Life Sciences Group, Inc. via the API
Pull this company's filings, identifiers, and metadata as JSON or Markdown. Authenticate with your API key, then query by company ID, ISIN, or LEI. Full schema documented in the OpenAPI spec.
Endpoints
| GET | /api/companies/33651/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=33651 | Paginated list of all filings (filterable by type, date, language) |
| GET | /api/filings/{id}/ | Single filing — metadata, document URL, processing status |
| GET | /api/filings/{id}/markdown/ | Filing content as Markdown (PDF → text/tables/figures) |
| GET | /api/isins/?company=33651 | All ISINs registered to this company |
| GET | /api/filing-types/ | Reference: every filing-type code + category |
Full reference: API reference · OpenAPI schema
cURL
$ curl https://api.financialreports.eu/api/filings/?company=33651 \ -H "x-api-key: $FR_API_KEY" \ -H "Accept: application/json"
Python
import requests r = requests.get( "https://api.financialreports.eu/api/filings/", params={"company": 33651}, headers={"x-api-key": API_KEY}, ) filings = r.json()["results"]
MCP server
// MCP server URL https://mcp.financialfilings.com/mcp // Once connected, the LLM can query this company directly: "Pull the latest 5 filings for SELLAS Life Sciences Group, Inc. (id: 33651)"
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