American Superconductor Corporation (AMSC)
Nasdaq: AMSC · Motors & Generators · Devens, MA · filing with the SEC since 1996
Grade6.5
◀ Past 6.1● Present 6.3▶ Future 7.3
Filings
267 filings since 2017 beside 189 insider forms · Large accelerated filer · read from EDGAR on Nov 13, 2026Due nextLarge accelerated filer
10-Q
Quarterly report for the quarter ending Dec 31, 2026Large accelerated filers have 40 days after the quarter ends; quarter ends are taken to the month end.
by Feb 9, 2027
10-K
Annual report for the fiscal year ending Mar 31, 2027Large accelerated filers have 60 days after the fiscal year ends.
by May 30, 2027
A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 35 days after the quarter ended. The proxy statement was last filed Jun 18, 2026.
Filings a yearinsider forms included
4042414532565543
2026 counts to Nov 13, 2026.
Officer or director change (8-K item 5.02): 5 times in the last 36 months, the newest Sep 21, 2026.SEC letters: 4 in the last 36 months, the newest Mar 13, 2024.
Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.
FiledFormWhat it is, in plain wordsPeriodAsk
Aug 5, 2026
8-K items 2.02, 5.07, 9.01
Results released; Shareholder vote · Current report
Jul 31, 2026
Feb 17, 2026
8-K/A item 9.01
Financial statements and exhibits · Current report, amended
Dec 5, 2025
Dec 10, 2025
8-K items 1.01, 2.01, 3.02, 8.01, 9.01
Major agreement signed; Purchase or sale of a business completed; Shares sold without registration; Other event · Current report
Dec 5, 2025
May 21, 2025
8-K items 2.02, 5.02, 9.01
Results released; Officer or director change · Current report
May 15, 2025
Feb 5, 2025
8-K items 2.02, 5.03, 9.01
Results released; Charter, bylaw or fiscal-year change · Current report
Jan 30, 2025
40 of 267 shown
Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.