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AMERICAN SUPERCONDUCTOR (AMSC)

Name: AMERICAN SUPERCONDUCTOR (AMSC) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Industry · SEC CIK 0000880807 · EDGAR filings · Updated 2026-06-18

AMERICAN SUPERCONDUCTOR (AMSC) has reported institutional ownership of 69.5%, with 241 institutional managers holding positions valued at $1.12B per the latest 13F reporting period.

Institutional ownership

69.5%

Institutional managers

241

Reported 13F value

$1.12B

Insider activity

29 trans.

−$15.4M net selling

Latest updates

2026-06-18 — ARS filed
2026-06-18 — DEFA14A filed
2026-06-18 — Proxy statement (DEF 14A) filed
2026-06-12 — Insider transaction reported (Form 4)
2026-06-11 — Notice of proposed sale filed (Form 144)
2026-06-11 — Insider transaction reported (Form 4)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, AMERICAN SUPERCONDUCTOR has 241 institutional holders and institutional ownership of 69.5%.

Insider activity

Insiders reported 29 transactions (2 buys, 19 sells) across 7 reporting insiders, with a net reported value of −$15.4M.

Related companies

INNOVEX INTERNATIONAL INC (INVX) · TORM PLC (TRMD) · TENNANT CO (TNC) · ICF INTERNATIONAL INCORPORATED (ICFI) · ENERGIZER HLDGS INC (ENR) · REDWIRE CORPORATION (RDW)

See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-06-18.