AMERICAN SUPERCONDUCTOR CORP /DE/ — DEFA14A Filings
18 DEFA14A filings on record
This page lists all DEFA14A filings submitted to the SEC by AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC), sorted by most recent first. Each row links to the full filing on EdgarLookup. AMERICAN SUPERCONDUCTOR CORP /DE/ has filed 18 DEFA14A documents with the SEC since 2007. To view all SEC filings by AMERICAN SUPERCONDUCTOR CORP /DE/, see the full filings list.
All
10-K
10-K/A
10-Q
10-Q/A
144
3
3/A
4
4/A
424B1
424B2
424B3
424B4
424B5
424B7
5
8-A12G
8-A12G/A
8-K
8-K/A
ARS
CORRESP
CT ORDER
D
DEF 14A
DEFA14A
DEFR14A
EFFECT
FWP
NT 10-K
NT 10-Q
POS AM
POSASR
PRE 14A
S-1
S-3
S-3/A
S-3ASR
S-3MEF
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13G/A
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| DEFA14A | DEFA14A | 0001193125-25-140738 | Jun 13, 2025 | — |
| DEFA14A | DEFA14A | 0001193125-24-164450 | Jun 20, 2024 | — |
| DEFA14A | DEFA14A | 0001193125-23-177515 | Jun 28, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-22-201602 | Jul 26, 2022 | — |
| DEFA14A | DEFA14A | 0001193125-22-180151 | Jun 23, 2022 | — |
| DEFA14A | DEFA14A | 0001193125-21-193240 | Jun 17, 2021 | — |
| DEFA14A | DEFA14A | 0001193125-20-174036 | Jun 19, 2020 | — |
| DEFA14A | DEFA14A | 0001193125-19-177543 | Jun 20, 2019 | — |
| DEFA14A | DEFA14A | 0001193125-18-194405 | Jun 15, 2018 | — |
| DEFA14A | DEFA14A | 0001193125-17-205560 | Jun 16, 2017 | — |
| DEFA14A | DEFA14A | 0001193125-16-625028 | Jun 17, 2016 | — |
| DEFA14A | DEFA14A | 0001193125-15-228728 | Jun 19, 2015 | — |
| DEFA14A | DEFA14A | 0001193125-15-037125 | Feb 6, 2015 | — |
| DEFA14A | DEFA14A | 0001193125-14-241093 | Jun 18, 2014 | — |
| DEFA14A | DEFA14A | 0001193125-13-262798 | Jun 18, 2013 | — |
| DEFA14A | SC DEFA14A | 0000950123-10-059956 | Jun 22, 2010 | — |
| DEFA14A | NOTICE & ACCESS | 0001193125-09-135732 | Jun 23, 2009 | — |
| DEFA14A | DEFA14A | 0001193125-08-139185 | Jun 24, 2008 | — |