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AMERICAN SUPERCONDUCTOR CORP /DE/ — Investor Relations & Filings

Ticker · AMSC ISIN · US0301112076 LEI · 549300S9YT8Z8LOK4452 US Manufacturing
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Filings indexed 1,014 across all filing types
Latest filing 2017-05-09 Director's Dealing
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
FORM 4 SUBMISSION
Director's Dealing
2017-05-09 English
424B5
Capital/Financing Update Classification · 100% confidence The document is a prospectus supplement filed pursuant to Rule 424(b)(5) related to a public offering of common stock. It includes detailed information about the offering terms, underwriting, risk factors, use of proceeds, and incorporation by reference of other SEC filings such as Annual Reports on Form 10-K and Quarterly Reports on Form 10-Q. The document is a registration and offering prospectus supplement, which is a type of capital raising disclosure. It is not an annual report, earnings release, or other financial report, but rather a detailed disclosure document for a stock offering. Therefore, it fits the category of Capital/Financing Update (CAP).
2017-05-08 English
SCHEDULE 13G
Major Shareholding Notification
2017-05-08 English
424B5
Capital/Financing Update Classification · 95% confidence The document is a prospectus supplement filed pursuant to Rule 424(b)(5) related to a common stock offering. It includes detailed information about the offering, underwriting, risk factors, and incorporation by reference of prior SEC filings such as 10-K, 10-Q, and proxy statements. The document is a registration and offering prospectus supplement, not a financial report, earnings release, or management discussion. It is a capital markets document related to fundraising and issuance of shares. Therefore, it fits the category of Capital/Financing Update (CAP). The document length is substantial (15,000 characters), and it contains detailed offering terms, not just an announcement or a brief notice, so it is not an RPA or RNS. Hence, the classification is CAP with high confidence.
2017-05-04 English
8-K
Regulatory Filings Classification · 100% confidence The document is a Form 8-K filed with the SEC, which is a Current Report used to announce unscheduled material events or corporate changes of importance to shareholders. The text includes details about the termination of a material definitive agreement (a sales agreement for shares), updates on business developments, market information, and risk factors. It does not contain comprehensive financial statements or detailed financial performance data typical of Annual Reports (10-K) or Interim Reports (IR). It is not a transcript, proxy statement, or other specialized filing. The presence of the SEC Form 8-K header and the nature of the content clearly identify this as a Regulatory Filing (RNS) under the given classification scheme, which is the fallback category for miscellaneous filings that do not fit other specific categories. The document length (15,000 characters) and content confirm it is a full filing, not just a brief announcement or certification.
2017-05-04 English
FORM 8-K
Earnings Release Classification · 95% confidence The document is a Form 8-K filed with the SEC, which is a current report used to announce major events. The text specifically mentions that the company announced preliminary financial results for the fourth quarter and full fiscal year ended March 31, 2017, and that the full text of the press release is attached as an exhibit. The document itself is short (3675 characters) and primarily serves to announce the earnings release rather than containing detailed financial statements or analysis. According to the rules, initial announcements of quarterly or periodical financial results (key highlights only) are classified as Earnings Release (ER). The document is not the full annual or quarterly report but an announcement of preliminary results, fitting the ER category.
2017-04-26 English

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