American Superconductor Corp /De/
AMSC · NASDAQ · Industrials · Motors & Generators
Motors & Generators company based in Devens, Ma.
Example public filing
Oberweis Asset Management Inc added to its stake +138K shares
Oberweis Asset Management Inc added to its stake in American Superconductor Corp /De/, per its Q2 2026 13F.
- 988K
- Shares reported · +138K vs prior quarter
- 0.85%
- Disclosed portfolio weight
- $41M
- Reported value
- Holdings as of
- Jun 30, 2026
- Filed
- Aug 14, 2026
Data as of Oct 11, 2026. A real record from the official source, chosen as the most recent insider trade or, failing that, the most recent filing of another kind; not a recommendation.
On file for AMSC, last 12 months
- 0
- Insider filings
- 0
- Congress trades
- 11
- Fund positions
- 0
- Federal contracts
Records OQRO holds, counted by their date; a 13F position is counted once per quarter it is reported.
Insider buying and selling since 2006
Insiders of American Superconductor Corp /De/ reported 200 open-market purchases and 986 sales since 2006; purchases in 9 different years, most recently 2022.
| Year | Bought | Sold |
|---|---|---|
| 2025 | — | 18×18 trades |
| 2024 | — | 7×7 trades |
| 2023 | — | 4×4 trades |
| 2022 | 3×3 trades | 4×4 trades |
| 2021 | — | 13×13 trades |
| 2020 | — | 1×1 trade |
| 2019 | — | 1×1 trade |
| 2018 | 2×2 trades | 2×2 trades |
| 2017 | 4×4 trades | — |
| 2016 | — | 7×7 trades |
| 2015 | 4×4 trades | 2×2 trades |
| 2014 | — | 6×6 trades |
| 2013 | 24×24 trades | 2×2 trades |
| 2012 | 36×36 trades | 5×5 trades |
| 2011 | 51×51 trades | 5×5 trades |
| 2010 | 72×72 trades | 33×33 trades |
| 2009 | — | 242×242 trades |
| 2008 | — | 283×283 trades |
| 2007 | 4×4 trades | 327×327 trades |
| 2006 | — | 24×24 trades |
Open-market purchases (code P) and sales (code S) on Forms 4 and 5. Up to Sep 2024 from the SEC's Insider Transactions Data Sets; since Oct 2024 from each filing as it is published. A trade filed twice (an amendment) counts once. The amounts, the people and every filing are in OQRO Pro.
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11 records for American Superconductor Corp /De/ in the last 12 months, each linked to its filing. Full histories, the screener, alerts for the companies you follow and Ask OQRO.
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What this page holds
- Insider trades and planned sales
- Politician trades (House and Senate)
- Fund holdings from 13F filings
- Federal contracts, lobbying and short selling
- Full history and context, with a link to every filing
What OQRO is
OQRO reads the public record for US-listed companies — insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings, and federal contract awards — and puts each one in plain words next to the filing it came from. It describes what was disclosed. It does not give investment advice or tell you what to buy.
Want to see real filings before you pay? The home page shows live ones, free, with the link to each source document.
Questions about American Superconductor Corp /De/ insider trading
Have American Superconductor Corp /De/ insiders bought shares recently?
No open-market purchase by an insider of American Superconductor Corp /De/ was filed in the last 90 days. The latest on record was on Aug 6, 2025.
How often do American Superconductor Corp /De/ insiders buy and sell shares?
Since 2006, American Superconductor Corp /De/ insiders reported 200 open-market purchases and 986 sales on Forms 4 and 5, with purchases in 9 different years, most recently 2022.
Do members of Congress trade AMSC?
No trade in American Superconductor Corp /De/ (AMSC) was disclosed by a member of Congress in the last 12 months.
Where does this data come from?
From official filings only: SEC Forms 4, 5 and 144 for insiders, House and Senate periodic transaction reports for Congress, SEC Form 13F for funds, Form 8-K for company events and USAspending for federal contracts. Every record on OQRO links to its source. It is public data, not investment advice.