Mailing Address SIXTY FOUR JACKSON ROAD DEVENS MA 01434
Business Address SIXTY FOUR JACKSON ROAD DEVENS MA 01434 9788423000
AMERICAN SUPERCONDUCTOR CORP /DE/ CIK#: 0000880807 (see all company filings)

SIC: 3621 - MOTORS & GENERATORS
State location: MA | State of Inc.: DE | Fiscal Year End: 0331
(CF Office: 04 Manufacturing)
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Items 1 - 100  0000880807 Filings RSS Feed
Filings Format Description Filed/Effective File/Film Number
SCHEDULE 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001576419-25-000693 (34 Act)  Size: 10 KB
2025-04-17 005-41994
25844654
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-25-051189 Size: 4 KB
2025-04-04
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-25-051187 Size: 4 KB
2025-04-04
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-25-051186 Size: 4 KB
2025-04-04
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-25-051183 Size: 4 KB
2025-04-04
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-25-051168 Size: 4 KB
2025-04-04
SCHEDULE 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001088875-25-000024 (34 Act)  Size: 6 KB
2025-02-12 005-41994
25612934
SCHEDULE 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0002012383-25-001507 (34 Act)  Size: 11 KB
2025-02-05 005-41994
25594548
8-K  Documents   Interactive Data Current report, items 2.02, 5.03, and 9.01
Acc-no: 0001437749-25-002901 (34 Act)  Size: 791 KB
2025-02-05 000-19672
25593337
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001437749-25-002900 (34 Act)  Size: 9 MB
2025-02-05 000-19672
25593293
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000932471-24-000909 (34 Act)  Size: 6 KB
2024-11-12 005-41994
241446605
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0002012383-24-003644 (34 Act)  Size: 13 KB
2024-11-08 005-41994
241439786
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-122413 Size: 5 KB
2024-11-06
144  Documents Report of proposed sale of securities
Acc-no: 0001972362-24-001482 (33 Act)  Size: 6 KB
2024-11-05 000-19672
241428398
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000932471-24-000274 (34 Act)  Size: 5 KB
2024-11-04 005-41994
241421386
SCHEDULE 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001088875-24-000106 (34 Act)  Size: 7 KB
2024-11-04 005-41994
241421164
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001437749-24-032618 (34 Act)  Size: 8 MB
2024-10-30 000-19672
241410487
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001437749-24-032617 (34 Act)  Size: 521 KB
2024-10-30 000-19672
241410441
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0002012383-24-001660 (34 Act)  Size: 13 KB
2024-10-22 005-41994
241387386
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-110883 Size: 5 KB
2024-10-01
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-110427 Size: 5 KB
2024-09-30
S-8  Documents Securities to be offered to employees in employee benefit plans
Acc-no: 0001193125-24-208843 (33 Act)  Size: 79 KB
2024-08-28 333-281826
241255955
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0001193125-24-199141 (34 Act)  Size: 168 KB
2024-08-13 000-19672
241198456
424B7  Documents Prospectus [Rule 424(b)(7)]
Acc-no: 0001193125-24-199010 (33 Act)  Size: 501 KB
2024-08-12 333-281496
241198014
S-3ASR  Documents Automatic shelf registration statement of securities of well-known seasoned issuers
Acc-no: 0001193125-24-198982 (33 Act)  Size: 652 KB
2024-08-12 333-281496
241197873
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001535264-24-000048 (34 Act)  Size: 9 KB
2024-08-09 005-41994
241193277
8-K/A  Documents   Interactive Data [Amend] Current report, item 9.01
Acc-no: 0001437749-24-024924 (34 Act)  Size: 1 MB
2024-08-06 000-19672
241179981
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001437749-24-024886 (34 Act)  Size: 7 MB
2024-08-06 000-19672
241179322
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001437749-24-024881 (34 Act)  Size: 453 KB
2024-08-06 000-19672
241179240
8-K  Documents   Interactive Data Current report, items 5.02, 5.07, and 9.01
Acc-no: 0001193125-24-193965 (34 Act)  Size: 293 KB
2024-08-05 000-19672
241175238
8-K  Documents   Interactive Data Current report, items 1.01, 2.01, 8.01, and 9.01
Acc-no: 0001193125-24-193425 (34 Act)  Size: 783 KB
2024-08-05 000-19672
241173259
ARS  Documents Annual Report to Security Holders
Acc-no: 0001193125-24-164457 (34 Act)  Size: 1 MB
2024-06-20 000-19672
241056379
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001193125-24-164450 (34 Act)  Size: 131 KB
2024-06-20 000-19672
241056271
DEF 14A  Documents Other definitive proxy statements
Acc-no: 0001193125-24-164444 (34 Act)  Size: 1 MB
2024-06-20 000-19672
241056215
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-072273 Size: 6 KB
2024-06-12
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-072272 Size: 6 KB
2024-06-12
144  Documents Report of proposed sale of securities
Acc-no: 0001950047-24-004598 (33 Act)  Size: 6 KB
2024-06-11 000-19672
241035999
144  Documents Report of proposed sale of securities
Acc-no: 0001950047-24-004595 (33 Act)  Size: 6 KB
2024-06-11 000-19672
241035908
PRE 14A  Documents Other preliminary proxy statements
Acc-no: 0001193125-24-158370 (34 Act)  Size: 1 MB
2024-06-10 000-19672
241033179
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0001437749-24-018602 (34 Act)  Size: 9 MB
2024-05-29 000-19672
24999060
8-K  Documents   Interactive Data Current report, items 2.02, 5.02, and 9.01
Acc-no: 0001437749-24-018599 (34 Act)  Size: 524 KB
2024-05-29 000-19672
24998990
SD  Documents Specialized disclosure report
Acc-no: 0001437749-24-018462 (34 Act)  Size: 633 KB
2024-05-28 000-19672
24991971
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-063992 Size: 8 KB
2024-05-23
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-063979 Size: 8 KB
2024-05-23
144  Documents Report of proposed sale of securities
Acc-no: 0001950047-24-003982 (33 Act)  Size: 5 KB
2024-05-21 000-19672
24969597
144  Documents Report of proposed sale of securities
Acc-no: 0001950047-24-003981 (33 Act)  Size: 5 KB
2024-05-21 000-19672
24969576
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-041906 Size: 4 KB
2024-04-04
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-041905 Size: 4 KB
2024-04-04
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-041903 Size: 4 KB
2024-04-04
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-041901 Size: 4 KB
2024-04-04
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0000950170-24-041899 Size: 4 KB
2024-04-04
EFFECT  Documents Notice of Effectiveness
Acc-no: 9999999995-24-000669 (33 Act)  Size: 1 KB
2024-03-15 16:30:00 333-276766
24756797
CORRESP  Documents [Cover]Correspondence
Acc-no: 0001193125-24-066810 Size: 7 KB
2024-03-13
S-3/A  Documents [Amend] Registration statement under Securities Act of 1933
Acc-no: 0001193125-24-063702 (33 Act)  Size: 68 KB
2024-03-08 333-276766
24734990
CORRESP  Documents [Cover]Correspondence
Acc-no: 0001193125-24-060045 Size: 7 KB
2024-03-06
CORRESP  Documents [Cover]Correspondence
Acc-no: 0001193125-24-058784 Size: 7 KB
2024-03-05
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001535264-24-000022 (34 Act)  Size: 9 KB
2024-02-14 005-41994
24636314
UPLOAD  Documents [Cover]SEC-generated letter
Acc-no: 0000000000-24-001366 Size: 40 KB
2024-02-05 333-276766
424B5  Documents Prospectus [Rule 424(b)(5)]
Acc-no: 0001193125-24-021029 (33 Act)  Size: 444 KB
2024-01-31 333-253611
24583668
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0001193125-24-020938 (34 Act)  Size: 433 KB
2024-01-31 000-19672
24583179
424B5  Documents Prospectus [Rule 424(b)(5)]
Acc-no: 0001193125-24-019438 (33 Act)  Size: 443 KB
2024-01-30 333-253611
24578492
S-3  Documents Registration statement under Securities Act of 1933
Acc-no: 0001193125-24-019425 (33 Act)  Size: 686 KB
2024-01-30 333-276766
24578376
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000906304-24-000048 (34 Act)  Size: 10 KB
2024-01-30 005-41994
24577050
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001088875-24-000058 (34 Act)  Size: 11 KB
2024-01-30 005-41994
24575806
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001437749-24-002041 (34 Act)  Size: 7 MB
2024-01-24 000-19672
24556487
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001437749-24-002040 (34 Act)  Size: 471 KB
2024-01-24 000-19672
24556466
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001437749-23-029753 (34 Act)  Size: 7 MB
2023-11-01 000-19672
231368346
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001437749-23-029749 (34 Act)  Size: 469 KB
2023-11-01 000-19672
231368268
8-K  Documents   Interactive Data Current report, item 5.07
Acc-no: 0001437749-23-023329 (34 Act)  Size: 174 KB
2023-08-11 000-19672
231164222
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001437749-23-022793 (34 Act)  Size: 6 MB
2023-08-09 000-19672
231155234
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001437749-23-022786 (34 Act)  Size: 419 KB
2023-08-09 000-19672
231155164
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001088875-23-000092 (34 Act)  Size: 10 KB
2023-07-05 005-41994
231066770
ARS  Documents Annual Report to Security Holders
Acc-no: 0001193125-23-177521 (34 Act)  Size: 1 MB
2023-06-28 000-19672
231052312
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0001193125-23-177515 (34 Act)  Size: 134 KB
2023-06-28 000-19672
231052293
DEF 14A  Documents Other definitive proxy statements
Acc-no: 0001193125-23-177510 (34 Act)  Size: 1 MB
2023-06-28 000-19672
231052274
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-039376 Size: 8 KB
2023-06-23
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-039350 Size: 8 KB
2023-06-23
144  Documents Report of proposed sale of securities
Acc-no: 0001950047-23-001870 (33 Act)  Size: 5 KB
2023-06-22 000-19672
231034104
144  Documents Report of proposed sale of securities
Acc-no: 0001950047-23-001869 (33 Act)  Size: 6 KB
2023-06-22 000-19672
231034092
144  Documents Report of proposed sale of securities
Acc-no: 0001950047-23-001855 (33 Act)  Size: 5 KB
2023-06-21 000-19672
231030721
144  Documents Report of proposed sale of securities
Acc-no: 0001950047-23-001852 (33 Act)  Size: 5 KB
2023-06-21 000-19672
231030612
8-K  Documents   Interactive Data Current report, items 5.02 and 9.01
Acc-no: 0001193125-23-171201 (34 Act)  Size: 160 KB
2023-06-21 000-19672
231030293
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-038394 Size: 8 KB
2023-06-20
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-038383 Size: 8 KB
2023-06-20
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0001437749-23-016265 (34 Act)  Size: 10 MB
2023-05-31 000-19672
23981121
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001437749-23-016264 (34 Act)  Size: 494 KB
2023-05-31 000-19672
23981110
SD  Documents Specialized disclosure report
Acc-no: 0001437749-23-016150 (34 Act)  Size: 4 MB
2023-05-31 000-19672
23978183
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-023781 Size: 4 KB
2023-04-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-023776 Size: 4 KB
2023-04-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-023769 Size: 4 KB
2023-04-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-023766 Size: 4 KB
2023-04-07
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-23-023763 Size: 4 KB
2023-04-07
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001535264-23-000010 (34 Act)  Size: 9 KB
2023-02-14 005-41994
23624365
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000914208-23-000148 (34 Act)  Size: 17 KB
2023-02-08 005-41994
23596545
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0001437749-23-002270 (34 Act)  Size: 8 MB
2023-02-01 000-19672
23577658
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0001437749-23-002268 (34 Act)  Size: 476 KB
2023-02-01 000-19672
23577643
SC 13G  Documents Statement of Beneficial Ownership by Certain Investors
Acc-no: 0000906304-23-000063 (34 Act)  Size: 10 KB
2023-01-31 005-41994
23570750
SC 13G/A  Documents [Amend] Statement of Beneficial Ownership by Certain Investors
Acc-no: 0001088875-23-000021 (34 Act)  Size: 11 KB
2023-01-19 005-41994
23536606
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-22-061904 Size: 6 KB
2022-12-19
4  Documents Statement of changes in beneficial ownership of securities
Acc-no: 0001209191-22-061893 Size: 6 KB
2022-12-19