Annexon, Inc. — Investor Relations & Filings
Annexon, Inc. is a clinical-stage biopharmaceutical company developing a new class of complement medicines. The company's therapeutic approach is centered on inhibiting C1q, the initiating molecule of the classical complement pathway. By blocking C1q at the start of this immune cascade, Annexon aims to prevent the inflammation and tissue damage that drive a range of diseases. Its pipeline is focused on developing treatments for classical complement-mediated disorders affecting the body, brain, and eye, which include autoimmune, neurodegenerative, and ophthalmic conditions.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| SCHEDULE 13G/A - Annexon, Inc. (0001528115) (Subject) | 2026-03-26 | English | |
| 4 - ANNEXON, INC. (0001528115) (Filer) | 2026-03-04 | English | |
| 4 - ANNEXON, INC. (0001528115) (Filer) | 2026-03-04 | English | |
| 4 - ANNEXON, INC. (0001528115) (Filer) | 2026-03-04 | English | |
| 4 - ANNEXON, INC. (0001528115) (Filer) | 2026-03-04 | English | |
| 4 - ANNEXON, INC. (0001528115) (Filer) | 2026-03-04 | English |
Browse filings by year
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Peer group · Manufacture of pharmaceuticals, medicinal chemical and botanical products
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Annexon, 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/33181/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=33181 | 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=33181 | All ISINs registered to this company |
| GET | /api/filing-types/ | Reference: every filing-type code + category |
cURL
$ curl https://api.financialreports.eu/api/filings/?company=33181 \ -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": 33181}, 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 Annexon, Inc. (id: 33181)"
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