A business in context

AMSC research notebook

Read the disclosures. Follow the relationships. Keep the dates in view.

Research JSON

Filing timeline

Download filings CSV

SEC submissions · retrieved 2026-10-20 · 8029 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 8-K · Current report

    Report date 2026-09-17 · 0001437749-26-030822 · Items 5.02

  2. 4 · Ownership change

    Report date 2026-09-18 · 0001193125-26-396831

  3. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001437749-26-025922

  4. 8-K · Current report

    Report date 2026-07-31 · 0001437749-26-025921 · Items 2.02,5.07,9.01

  5. DEF 14A · Proxy statement

    Report date 2026-07-31 · 0001193125-26-275809

  6. 4 · Ownership change

    Report date 2026-06-11 · 0001193125-26-269433

  7. 4 · Ownership change

    Report date 2026-06-11 · 0001193125-26-267677

  8. 4 · Ownership change

    Report date 2026-06-11 · 0001193125-26-267642

  9. 4 · Ownership change

    Report date 2026-06-08 · 0001193125-26-265996

  10. 4 · Ownership change

    Report date 2026-06-08 · 0001193125-26-265990

  11. 4 · Ownership change

    Report date 2026-06-01 · 0001193125-26-255471

  12. 4 · Ownership change

    Report date 2026-06-01 · 0001193125-26-255450

  13. 8-K · Current report

    Report date 2026-06-01 · 0001437749-26-019163 · Items 5.02,9.01

  14. 10-K · Annual report

    Report date 2026-03-31 · 0001437749-26-018542

  15. 8-K · Current report

    Report date 2026-05-27 · 0001437749-26-018539 · Items 2.02,9.01

  16. 8-K/A · Current report

    Report date 2025-12-05 · 0001437749-26-004349 · Items 9.01

  17. 10-Q · Quarterly report

    Report date 2025-12-31 · 0001437749-26-002978

  18. 8-K · Current report

    Report date 2026-02-04 · 0001437749-26-002977 · Items 2.02,9.01

  19. 8-K · Current report

    Report date 2025-12-23 · 0001193125-25-330930 · Items 8.01,9.01

  20. 8-K · Current report

    Report date 2025-12-05 · 0001193125-25-314153 · Items 1.01,2.01,3.02,8.01,9.01

  21. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001437749-25-033351

  22. 8-K · Current report

    Report date 2025-11-05 · 0001437749-25-033344 · Items 2.02,9.01

  23. 10-Q · Quarterly report

    Report date 2025-06-30 · 0001437749-25-023968

  24. 8-K · Current report

    Report date 2025-07-30 · 0001437749-25-023965 · Items 2.02,9.01

  25. 8-K · Current report

    Report date 2025-07-25 · 0001437749-25-023783 · Items 5.07,9.01

  26. DEF 14A · Proxy statement

    Report date 2025-07-25 · 0001193125-25-140726

  27. 8-K · Current report

    Report date 2025-06-10 · 0001193125-25-139243 · Items 8.01,9.01

  28. 10-K · Annual report

    Report date 2025-03-31 · 0001437749-25-017986

  29. 8-K · Current report

    Report date 2025-05-15 · 0001437749-25-017983 · Items 2.02,5.02,9.01

  30. 8-K · Current report

    Report date 2025-01-30 · 0001437749-25-002901 · Items 2.02,5.03,9.01

  31. 10-Q · Quarterly report

    Report date 2024-12-31 · 0001437749-25-002900

  32. SC 13G/A · Ownership disclosure

    0000932471-24-000909

  33. SC 13G · Ownership disclosure

    0002012383-24-003644

  34. SC 13G · Ownership disclosure

    0000932471-24-000274

  35. 10-Q · Quarterly report

    Report date 2024-09-30 · 0001437749-24-032618

  36. 8-K · Current report

    Report date 2024-10-30 · 0001437749-24-032617 · Items 2.02,9.01

  37. SC 13G · Ownership disclosure

    0002012383-24-001660

  38. 8-K · Current report

    Report date 2024-08-12 · 0001193125-24-199141 · Items 8.01,9.01

  39. SC 13G/A · Ownership disclosure

    0001535264-24-000048

  40. 8-K/A · Current report

    Report date 2024-08-01 · 0001437749-24-024924 · Items 9.01

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-10-15 · 2026 Q3: filings in this completed quarter; not a live transaction feed

Purchases and sales include open-market or private transactions. Grants, exercises and tax withholding are shown separately. Amendments and joint reports can overlap; rows are not a net-buying score. Prices retain the filing's units; consult its footnotes.

Transaction rows by code · counts, not monetary totals
Purchase: 0 transaction rows0PSale: 0 transaction rows0SGrant / award: 1 transaction rows1AExercise / conversion: 0 transaction rows0MTax / exercise payment: 0 transaction rows0FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

1 matching transaction rows.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-09-18
2026-09-21
Littlefield Barbara G.A · Grant / award
Acquired
Common Stock1607.00.0

Identity & relationships

Wikidata structured data · retrieved 2026-10-15 · 1663 unambiguous CIK-linked entities; coverage is incomplete

These are sourced identity and relationship claims, with incomplete coverage. Headquarters locations do not describe sales, assets or operating exposure.

SEC issuer · 0000880807AMERICAN SUPERCONDUCTOR CORP /DE/

No parent relationship is available in this import; this is not proof of independence.

No verified LEI join available.

GLEIF legal entity reference data · retrieved 2026-10-15 · 1199 checked identities; 0 unavailable records

Search names and former names

    Revenue in constant purchasing power

    USD revenue expressed in 2026-09 consumer-price dollars. Each annual period uses a CPI-U average weighted by the days in its actual reporting interval. This is a purchasing-power comparison, not a company-specific price or volume measure.

    Year endedReported USD revenueCPI-adjusted USD revenue
    2025-03-31$222.82M$237.74M
    2024-03-31$145.64M$159.77M
    2023-03-31$105.98M$120.33M
    2022-03-31$108.44M$132.29M
    2021-03-31$87.12M$112.90M
    2020-03-31$63.84M$83.70M
    2019-03-31$56.21M$75.11M
    2018-03-31$48.40M$66.17M

    Bureau of Labor Statistics · retrieved 2026-10-20 · 9 selected series; gaps remain missing

    Explore the CPI history ↗