Skip to main content
AMERICAN SUPERCONDUCTOR CORP /DE/ logo

AMERICAN SUPERCONDUCTOR CORP /DE/ — Investor Relations & Filings

Ticker · AMSC ISIN · US0301112076 LEI · 549300S9YT8Z8LOK4452 US Manufacturing
Open in API
Filings indexed 1,014 across all filing types
Latest filing 2017-10-24 Regulatory Filings
Country US United States of America
Listing US AMSC

About AMERICAN SUPERCONDUCTOR CORP /DE/

https://www.amsc.com/

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
Regulatory Filings 2017
Regulatory Filings
2017-10-24 English
Regulatory Filings 2017
Regulatory Filings Classification · 95% confidence The document is a letter addressed to the SEC requesting acceleration of the effective date for a Registration Statement on Form S-3. It is a correspondence related to a regulatory filing process, specifically about the registration statement effectiveness, not the registration statement itself or any financial report. The document is short (1384 characters) and serves as a formal request rather than a report or announcement of results. Therefore, it fits best under Regulatory Filings (RNS), which covers general regulatory announcements and compliance documents that do not fit other categories.
2017-10-17 English
Regulatory Filings 2017
Regulatory Filings Classification · 90% confidence The provided document text appears to be an encoded or corrupted file content rather than readable text. There are no discernible keywords, regulatory references, form names, fiscal period dates, or document titles that can be used to identify the filing type. The document length is 15,000 characters, which is substantial, but the content is not interpretable as a financial or regulatory report. Given the lack of meaningful content and the fallback rule, the appropriate classification is Regulatory Filings (RNS), which serves as a catch-all for miscellaneous or unclassifiable filings.
2017-10-11 English
S-3
Capital/Financing Update Classification · 100% confidence The document is a Form S-3 Registration Statement filed with the SEC, which is used for registering securities for sale to the public. It includes details about the offering, selling stockholders, use of proceeds, and other related information. This type of filing is related to capital raising activities and financing. It is not an annual report, earnings release, or any other financial report but a capital/financing update. Therefore, the appropriate classification is Capital/Financing Update (CAP). The document length and content confirm it is the registration statement itself, not just an announcement or a certification.
2017-10-03 English
8-K
Capital/Financing Update Classification · 95% confidence The document is a Form 8-K Current Report filed with the SEC, dated September 25, 2017, by American Superconductor Corporation. The content describes the acquisition of Infinia Technology Corporation shares, including details of the stock purchase agreement, payment terms, and registration obligations. This type of filing is used to report major corporate events such as acquisitions and other significant transactions. It is not an annual or quarterly report, audit report, earnings release, or management discussion. The document is a regulatory announcement of a material event, specifically a capital transaction (acquisition) involving stock issuance and related agreements. Therefore, it fits best under the category of Capital/Financing Update (CAP). The document length is over 6,000 characters and contains substantive details about the transaction, not merely an announcement of a report publication or certification. Hence, the classification is CAP with high confidence.
2017-09-26 English
Regulatory Filings 2017
Regulatory Filings
2017-09-11 English

Browse filings by year

20 years

Report missing filing

Can't find a specific document? Let us know and we'll add it within 24 hours.

We will notify you once the filing is added.
Report sent
Thank you. We will check the data and update it shortly.