ADTRAN Holdings, Inc. — Investor Relations & Filings
ADTRAN Holdings, Inc. is a global provider of open, disaggregated networking and communications solutions. The company's portfolio includes hardware, software, and services designed for telecommunication service providers and other network operators. Its offerings encompass fiber broadband access, access and aggregation technologies, and open optical networking systems. These solutions enable the delivery of voice, data, video, and high-speed internet services to residential and business customers. ADTRAN also develops AI-powered software platforms, such as Mosaic One, to simplify network operations and management, providing end-to-end visibility and control from the network core to the subscriber premises.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| Regulatory Filings 2026 | 2026-05-02 | English | |
| Release according to Article 41 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution | 2026-04-30 | English | |
| Major Shareholding Notification 2026 | 2026-04-29 | English | |
| Major Shareholding Notification 2026 | 2026-04-28 | English | |
| Major Shareholding Notification 2026 | 2026-04-23 | English | |
| Major Shareholding Notification 2026 | 2026-04-22 | English |
Market data
Market data not available
Price history
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ADTRAN Holdings, 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/6211/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=6211 | 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=6211 | 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=6211 \ -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": 6211}, 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 ADTRAN Holdings, Inc. (id: 6211)"
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