AMERICAN SUPERCONDUCTOR CORP /DE/ — All Filings
1,000 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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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 |
|---|---|---|---|---|
| SCHEDULE 13G/A | — | 0000102909-26-000605 | Mar 26, 2026 | — |
| 4 | 4 | 0001193125-26-077349 | Feb 26, 2026 | Feb 24, 2026 |
| 8-K/A | FORM 8-K/A | 0001437749-26-004349 | Feb 17, 2026 | Dec 5, 2025 |
| 10-Q | FORM 10-Q | 0001437749-26-002978 | Feb 4, 2026 | Dec 31, 2025 |
| 8-K | FORM 8-K | 0001437749-26-002977 | Feb 4, 2026 | — |
| SCHEDULE 13G/A | — | 0000102909-26-000102 | Jan 30, 2026 | — |
| 8-K | 8-K | 0001193125-25-330930 | Dec 23, 2025 | — |
| 424B7 | 424B7 | 0001193125-25-330851 | Dec 23, 2025 | — |
| 8-K | 8-K | 0001193125-25-314153 | Dec 10, 2025 | Dec 5, 2025 |
| 4 | 4 | 0001193125-25-280371 | Nov 13, 2025 | Jun 18, 2019 |
| 10-Q | FORM 10-Q | 0001437749-25-033351 | Nov 5, 2025 | Sep 30, 2025 |
| 8-K | FORM 8-K | 0001437749-25-033344 | Nov 5, 2025 | — |
| 144 | — | 0001969223-25-000589 | Aug 8, 2025 | — |
| 4 | 4 | 0000950170-25-105858 | Aug 8, 2025 | Aug 6, 2025 |
| 4 | 4 | 0000950170-25-104155 | Aug 6, 2025 | Aug 4, 2022 |
| 4 | 4 | 0000950170-25-104149 | Aug 6, 2025 | Aug 4, 2025 |
| 4 | 4 | 0000950170-25-104131 | Aug 6, 2025 | Aug 4, 2025 |
| 144 | — | 0001950047-25-005417 | Aug 4, 2025 | — |
| 144 | — | 0001950047-25-005392 | Aug 4, 2025 | — |
| 10-Q | FORM 10-Q | 0001437749-25-023968 | Jul 30, 2025 | Jun 30, 2025 |
| 8-K | FORM 8-K | 0001437749-25-023965 | Jul 30, 2025 | — |
| 8-K | FORM 8-K | 0001437749-25-023783 | Jul 29, 2025 | Jul 25, 2025 |
| ARS | ARS | 0001193125-25-140753 | Jun 13, 2025 | Mar 31, 2025 |
| DEFA14A | DEFA14A | 0001193125-25-140738 | Jun 13, 2025 | — |
| DEF 14A | DEF 14A | 0001193125-25-140726 | Jun 13, 2025 | Jul 25, 2025 |
| 4 | 4 | 0000950170-25-085421 | Jun 12, 2025 | Jun 11, 2025 |
| 4 | 4 | 0000950170-25-085408 | Jun 12, 2025 | Jun 11, 2025 |
| 8-K | FORM 8-K | 0001193125-25-139243 | Jun 11, 2025 | Jun 10, 2025 |
| 424B5 | 424B5 | 0001193125-25-139239 | Jun 11, 2025 | — |
| 144 | — | 0001950047-25-004129 | Jun 11, 2025 | — |
| 144 | — | 0001950047-25-004127 | Jun 11, 2025 | — |
| 424B5 | 424B5 | 0001193125-25-138450 | Jun 10, 2025 | — |
| 4 | 4 | 0000950170-25-083826 | Jun 9, 2025 | Jun 6, 2025 |
| 4 | 4 | 0000950170-25-083818 | Jun 9, 2025 | Jun 6, 2025 |
| 144 | — | 0001950047-25-003943 | Jun 6, 2025 | — |
| 144 | — | 0001950047-25-003942 | Jun 6, 2025 | — |
| 4 | 4 | 0000950170-25-079169 | May 29, 2025 | May 27, 2025 |
| 4 | 4 | 0000950170-25-079157 | May 29, 2025 | May 27, 2025 |
| 4 | 4 | 0000950170-25-079138 | May 29, 2025 | May 27, 2025 |
| 3 | 3 | 0000950170-25-079129 | May 29, 2025 | May 27, 2025 |
| 144 | — | 0001950047-25-003445 | May 27, 2025 | — |
| 144 | — | 0001950047-25-003441 | May 27, 2025 | — |
| 4 | 4 | 0000950170-25-076416 | May 22, 2025 | May 20, 2025 |
| 4 | 4 | 0000950170-25-076404 | May 22, 2025 | May 20, 2025 |
| SD | FORM SD | 0001437749-25-018002 | May 21, 2025 | — |
| 10-K | FORM 10-K | 0001437749-25-017986 | May 21, 2025 | Mar 31, 2025 |
| 8-K | FORM 8-K | 0001437749-25-017983 | May 21, 2025 | May 15, 2025 |
| 144 | — | 0001950047-25-003240 | May 20, 2025 | — |
| 144 | — | 0001950047-25-003239 | May 20, 2025 | — |
| 4 | 4 | 0000950170-25-074461 | May 19, 2025 | May 15, 2025 |