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American Superconductor Corp

AMSC
Exchange
Nasdaq
Industry
Motors & Generators
SEC CIK
0000880807

No open-market purchases or sales by American Superconductor Corp insiders were filed in the last 90 days; 277 institutions reported holding it in 13F filings for Q2 2026, worth $1.47B in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by American Superconductor Corp insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for American Superconductor Corp, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for American Superconductor Corp
NameTitleLast reported holdingLast filingFilings, past year
Littlefield Barbara G.Director37,034Sep 21, 20262
Dambier Laura A.Director14,992Jun 12, 20262
McGahn Daniel PChairman, President and CEO1,131,929Jun 11, 20263
Kosiba John W JRSVP, CFO & Treasurer334,377Jun 11, 20263
Oliver David R JrDirector63,823Apr 7, 20263
House Arthur HDirector51,779Apr 7, 20261
Klein Margaret D.Director19,492Apr 7, 20261
Donnelly Terence RobertDirector2,665Apr 7, 20261
Budhraja Vikram SDirector59,299Jun 13, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jul 6, 2021 (view filing)Jul 15 daysKosiba John W JRSVP, CFO & TreasurerSSale−6.41K$17.66−$113.2K−2.7%232.4K after
Jul 6, 2021 (view filing)Jul 15 daysMcGahn Daniel PChairman, President and CEOSSale−14.7K$17.66−$259.0K−2.1%694.1K after
Nov 2, 2021 (view filing)Nov 1-21 dayKosiba John W JRSVP, CFO & TreasurerSSale−11.0K$18.84−$207.4K−4.5%233.3K after3 lots
Nov 2, 2021 (view filing)Nov 11 dayMcGahn Daniel PChairman, President and CEOSSale−7.24K$18.96−$137.3K−1.0%722.5K after
Dec 9, 2021 (view filing)Dec 81 dayBudhraja Vikram SDirectorSSale−3.00K$11.98−$35.9K−5.5%51.7K after
Dec 13, 2021 (view filing)Dec 103 daysKosiba John W JRSVP, CFO & TreasurerSSale−22.8K$11.31−$257.3K−9.8%210.6K after
Jun 2, 2022 (view filing)May 312 daysKosiba John W JRSVP, CFO & TreasurerSSale−13.3K$5.45−$72.6K−6.3%197.2K after
Jun 2, 2022 (view filing)May 312 daysMcGahn Daniel PChairman, President and CEOSSale−21.7K$5.45−$118.4K−3.0%700.8K after
Jun 13, 2022 (view filing)Jun 103 daysKosiba John W JRSVP, CFO & TreasurerSSale−8.47K$5.97−$50.6K−4.3%188.8K after
Jun 13, 2022 (view filing)Jun 103 daysMcGahn Daniel PChairman, President and CEOSSale−32.6K$5.98−$194.9K−4.6%668.2K after
Dec 13, 2022 (view filing)Dec 121 dayKosiba John W JRSVP, CFO & TreasurerPPurchase+25.0K$3.34+$83.5K+8.0%338.8K after
Dec 19, 2022 (view filing)Dec 163 daysKosiba John W JRSVP, CFO & TreasurerPPurchase+15.0K$3.50+$52.5K+4.4%353.8K after
Dec 19, 2022 (view filing)Dec 163 daysMcGahn Daniel PChairman, President and CEOPPurchase+25.0K$3.49+$87.3K+2.7%943.2K after
Jun 23, 2023 (view filing)Jun 21-222 daysKosiba John W JRSVP, CFO & TreasurerSSale−80.0K$6.08−$486.1K−17.5%377.1K after2 lots10b5-1
Jun 23, 2023 (view filing)Jun 21-222 daysMcGahn Daniel PChairman, President and CEOSSale−110.7K$6.08−$672.7K−9.3%1.08M after2 lots10b5-1
May 23, 2024 (view filing)May 212 daysMcGahn Daniel PChairman, President and CEOSSale−20.6K$14.82−$304.7K−1.9%1.06M after2 lots10b5-1
May 23, 2024 (view filing)May 212 daysKosiba John W JRSVP, CFO & TreasurerSSale−29.0K$14.82−$429.7K−7.7%348.1K after2 lots10b5-1
Jun 12, 2024 (view filing)Jun 111 dayKosiba John W JRSVP, CFO & TreasurerSSale−32.0K$21.68−$693.8K−9.2%316.1K after10b5-1
Jun 12, 2024 (view filing)Jun 111 dayMcGahn Daniel PChairman, President and CEOSSale−37.2K$21.69−$806.1K−3.5%1.02M after10b5-1
Nov 6, 2024 (view filing)Nov 42 daysKosiba John W JRSVP, CFO & TreasurerSSale−50.0K$28.28−$1.41M−12.3%356.1K after
May 22, 2025 (view filing)May 202 daysMcGahn Daniel PChairman, President and CEOSSale−12.8K$24.49−$313.8K−0.9%1.43M after10b5-1
May 22, 2025 (view filing)May 202 daysKosiba John W JRSVP, CFO & TreasurerSSale−11.9K$24.50−$290.6K−2.5%464.3K after10b5-1
May 29, 2025 (view filing)May 272 daysKosiba John W JRSVP, CFO & TreasurerSSale−50.0K$26.40−$1.32M−10.8%414.3K after2 lots10b5-1
May 29, 2025 (view filing)May 272 daysMcGahn Daniel PChairman, President and CEOSSale−122.7K$26.39−$3.24M−8.6%1.30M after2 lots10b5-1
Jun 9, 2025 (view filing)Jun 63 daysMcGahn Daniel PChairman, President and CEOSSale−7.69K$31.82−$244.7K−0.6%1.30M after10b5-1
Jun 9, 2025 (view filing)Jun 63 daysKosiba John W JRSVP, CFO & TreasurerSSale−4.74K$31.83−$151.0K−1.1%409.5K after10b5-1
Jun 12, 2025 (view filing)Jun 111 dayKosiba John W JRSVP, CFO & TreasurerSSale−6.64K$28.57−$189.8K−1.6%402.9K after2 lots10b5-1
Jun 12, 2025 (view filing)Jun 111 dayMcGahn Daniel PChairman, President and CEOSSale−12.8K$28.58−$366.3K−1.0%1.28M after2 lots10b5-1
Aug 6, 2025 (view filing)Aug 42 daysKosiba John W JRSVP, CFO & TreasurerSSale−50.0K$54.59−$2.73M−12.4%352.9K after2 lots
Aug 6, 2025 (view filing)Aug 42 daysKosiba John W JRSVP, CFO & TreasurerSSale−9.84K$55.26−$543.9K−100.0%0 after
Aug 6, 2025 (view filing)Aug 42 daysMcGahn Daniel PChairman, President and CEOSSale−100.8K$54.49−$5.50M−7.9%1.18M after2 lots
Aug 6, 2025 (view filing)Aug 4, 20221,098 daysLateKlein Margaret D.DirectorPPurchase+500$5.57+$2.79K+3.1%16.4K after
Aug 8, 2025 (view filing)Aug 8Same dayHouse Arthur HDirectorSSale−9.70K$50.92−$494.1K−16.6%48.7K after
Nov 13, 2025 (view filing)Jun 18, 20192,340 daysLateOliver David R JrDirectorPPurchase+200$8.33+$1.67K+0.3%60.9K after
Feb 26, 2026 (view filing)Feb 242 daysOliver David R JrDirectorSSale−200$34.10−$6.82K−0.3%60.7K after
Jun 3, 2026 (view filing)Jun 2-31 dayMcGahn Daniel PChairman, President and CEOSSale−85.4K$50.49−$4.31M−6.9%1.16M after8 lots10b5-1
Jun 3, 2026 (view filing)Jun 2-31 dayKosiba John W JRSVP, CFO & TreasurerSSale−36.9K$50.45−$1.86M−9.6%346.0K after7 lots10b5-1
Jun 10, 2026 (view filing)Jun 82 daysMcGahn Daniel PChairman, President and CEOSSale−9.67K$41.78−$404.0K−0.8%1.15M after2 lots10b5-1
Jun 10, 2026 (view filing)Jun 82 daysKosiba John W JRSVP, CFO & TreasurerSSale−4.83K$41.77−$202.0K−1.4%341.1K after2 lots10b5-1
Jun 11, 2026 (view filing)Jun 11Same dayMcGahn Daniel PChairman, President and CEOSSale−16.1K$37.44−$603.5K−1.4%1.13M after2 lots10b5-1
Jun 11, 2026 (view filing)Jun 11Same dayKosiba John W JRSVP, CFO & TreasurerSSale−6.77K$37.46−$253.6K−2.0%334.4K after2 lots10b5-1
Jun 12, 2026 (view filing)Jun 111 dayDambier Laura A.DirectorSSale−4.00K$37.63−$150.5K−21.1%15.0K after