AMERICAN SUPERCONDUCTOR CORP /DE/ — Investor Relations & Filings
American Superconductor Corporation (AMSC) is an energy technology company that provides megawatt-scale power resiliency solutions. The company's offerings are organized into two primary segments: Gridtec and Windtec. The Gridtec segment delivers advanced grid systems that enhance the performance, reliability, and capacity of power networks. Key products include D-VAR® dynamic reactive compensation and PQ-IVR® voltage restoration systems, which manage voltage, improve power quality, and facilitate the integration of renewable energy. The Windtec segment provides electronic controls, systems, and engineering services for the wind energy market, including proprietary wind turbine designs, power electronics, and control software. AMSC also designs and manufactures high-temperature superconductor (HTS) wires and related power systems.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| Major Shareholding Notification 2026 | 2026-04-29 | English | |
| Major Shareholding Notification 2026 | 2026-03-26 | English | |
| 4 - AMERICAN SUPERCONDUCTOR CORP /DE/ (0000880807) (Filer) | 2026-02-26 | English | |
| FORM 8-K/A | 2026-02-17 | English | |
| 10-Q - AMERICAN SUPERCONDUCTOR CORP /DE/ (0000880807) (Filer) | 2026-02-04 | English | |
| 8-K Filing | 2026-02-04 | English |
Browse filings by year
20 years- 2026 7 filings
- 2025 55 filings
- 2024 56 filings
- 2023 32 filings
- 2022 45 filings
- 2021 41 filings
- 2020 42 filings
- 2019 40 filings
- 2018 51 filings
- 2017 51 filings
- 2016 42 filings
- 2015 51 filings
- 2014 52 filings
- 2013 46 filings
- 2012 68 filings
- 2011 73 filings
- 2010 76 filings
- 2009 68 filings
- 2008 76 filings
- 2007 38 filings
| ID | Filing | Released | Lang | Actions | |
|---|---|---|---|---|---|
|
2026
7 filings
| |||||
| 46151154 | Major Shareholding Notification 2026 | 2026-04-29 | English | ||
| 46151151 | Major Shareholding Notification 2026 | 2026-03-26 | English | ||
| 32882906 | 4 - AMERICAN SUPERCONDUCTOR CORP /DE/ (0000880807) (Filer) | 2026-02-26 | English | ||
| 46151167 | FORM 8-K/A | 2026-02-17 | English | ||
| 32882907 | 10-Q - AMERICAN SUPERCONDUCTOR CORP /DE/ (0000880807) (Filer) | 2026-02-04 | English | ||
| 24705898 | 8-K Filing | 2026-02-04 | English | ||
| 24705885 | SCHEDULE 13G/A Filing | 2026-01-30 | English | ||
|
2025
8 filings
| |||||
| 24705911 | 424B7 Filing | 2025-12-23 | English | ||
| 24705883 | 8-K Filing | 2025-12-23 | English | ||
| 9869085 | 8-K | 2025-12-10 | English | ||
| 9869086 | 4 | 2025-11-13 | English | ||
| 9869092 | FORM 10-Q | 2025-11-05 | English | ||
| 9869087 | FORM 8-K | 2025-11-05 | English | ||
| 9869088 | Regulatory Filings 2025 | 2025-08-08 | English | ||
| 9869093 | 4 | 2025-08-08 | English | ||
Market data
Market data not available
Price history
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AMERICAN SUPERCONDUCTOR CORP /DE/ 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/31453/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=31453 | 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=31453 | 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=31453 \ -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": 31453}, 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 AMERICAN SUPERCONDUCTOR CORP /DE/ (id: 31453)"
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