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AMSC Insider Trading

Insider Ownership Percentage: 4.80%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $10,948,635.23

American Superconductor Insider Trading History Chart

This chart shows the insider buying and selling history at American Superconductor by year and by quarter.

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American Superconductor Share Price & Price History

Current Price: $51.84
Price Change: +0.30 (1.20%)
As of 05/22/2026 04:00 PM ET

This chart shows the closing price history over time for AMSC up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

American Superconductor Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
2/24/2026David R. Oliver, Jr.DirectorSell200$34.10$6,820.0060,707View SEC Filing Icon  
8/8/2025Arthur H HouseDirectorSell9,703$50.92$494,076.7648,663View SEC Filing Icon  
8/4/2025Daniel P McgahnCEOSell100,848$54.49$5,495,207.521,183,134View SEC Filing Icon  
6/6/2025Daniel P McgahnCEOSell7,689$31.82$244,663.981,296,797View SEC Filing Icon  
6/6/2025John W. Kosiba, Jr.CFOSell4,744$31.83$151,001.52409,532View SEC Filing Icon  
5/27/2025Daniel P McgahnCEOSell122,655$26.39$3,236,865.451,304,486View SEC Filing Icon  
5/27/2025John W. Kosiba, Jr.CFOSell50,000$26.40$1,320,000.00414,276View SEC Filing Icon  
6/11/2024Daniel P McgahnCEOSell37,165$21.69$806,108.851,019,956View SEC Filing Icon  
6/11/2024John W. Kosiba, Jr.CFOSell32,000$21.68$693,760.00316,136View SEC Filing Icon  
5/21/2024Daniel P McgahnCEOSell20,559$14.82$304,684.381,057,121View SEC Filing Icon  
5/21/2024John W. Kosiba, Jr.CFOSell29,000$14.82$429,780.00348,136View SEC Filing Icon  
6/22/2023Daniel P McgahnCEOSell36,902$5.95$219,566.901,077,680View SEC Filing Icon  
6/21/2023John W. Kosiba, Jr.CFOSell50,132$6.15$308,311.80407,014View SEC Filing Icon  
8/4/2022Margaret D KleinDirectorBuy500$5.57$2,785.0016,376View SEC Filing Icon  
6/18/2019David R. Oliver, Jr.DirectorBuy200$8.33$1,666.0060,907View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for American Superconductor (NASDAQ:AMSC)

52.28% of American Superconductor stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at AMSC by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

American Superconductor Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/19/2026Bank of America Corp DE209,451$7.09M0.0%+26.5%0.440%Search for SEC Filing on Google Icon
5/18/2026Amundi58,169$1.97M0.0%+25.6%0.122%Search for SEC Filing on Google Icon
5/18/2026California State Teachers Retirement System57,016$1.93M0.0%+12.0%0.120%Search for SEC Filing on Google Icon
5/18/2026ROI Financial Advisors LLC10,731$0.36M0.2%+5.9%0.023%Search for SEC Filing on Google Icon
5/18/2026Royal Bank of Canada31,336$1.06M0.0%-30.6%0.066%Search for SEC Filing on Google Icon
5/16/2026The Manufacturers Life Insurance Company 20,828$0.71M0.0%+2.0%0.044%Search for SEC Filing on Google Icon
5/16/2026Lazard Asset Management LLC56,452$1.91M0.0%N/A0.119%Search for SEC Filing on Google Icon
5/14/2026Arrowstreet Capital Limited Partnership446,752$15.12M0.0%-34.6%0.938%Search for SEC Filing on Google Icon
5/14/2026Sei Investments Co.224,436$7.60M0.0%+184.8%0.471%Search for SEC Filing on Google Icon
5/14/2026State of Wyoming4,624$0.16M0.0%+53.1%0.010%Search for SEC Filing on Google Icon
5/13/2026Cetera Investment Advisers10,023$0.34M0.0%-12.3%0.021%Search for SEC Filing on Google Icon
5/13/2026First Trust Advisors LP778,268$26.34M0.0%+14.0%1.635%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP658,297$22.28M0.0%+21.8%1.383%Search for SEC Filing on Google Icon
5/7/2026Morgan Dempsey Capital Management LLC8,510$0.29M0.1%N/A0.018%Search for SEC Filing on Google Icon
5/6/2026Allspring Global Investments Holdings LLC149,601$4.88M0.0%-26.9%0.314%Search for SEC Filing on Google Icon
5/5/2026D.A. Davidson & CO.6,794$0.23M0.0%-3.1%0.014%Search for SEC Filing on Google Icon
5/5/2026Bank of New York Mellon Corp134,790$4.56M0.0%-1.6%0.283%Search for SEC Filing on Google Icon
5/4/2026Emerald Mutual Fund Advisers Trust438,875$14.86M0.7%+0.8%0.922%Search for SEC Filing on Google Icon
5/1/2026Kornitzer Capital Management Inc. KS34,973$1.18M0.0%-3.3%0.073%Search for SEC Filing on Google Icon
4/28/2026Stephens Investment Management Group LLC308,515$10.44M0.1%+77.1%0.648%Search for SEC Filing on Google Icon
4/27/2026PFG Investments LLC15,830$0.54M0.0%N/A0.033%Search for SEC Filing on Google Icon
4/25/2026Strs Ohio17,700$0.60M0.0%-16.5%0.037%Search for SEC Filing on Google Icon
4/24/2026Acorn Financial Advisory Services Inc. ADV6,004$0.20M0.0%N/A0.013%Search for SEC Filing on Google Icon
4/22/2026Janney Montgomery Scott LLC56,946$1.93M0.0%+22.8%0.120%Search for SEC Filing on Google Icon
4/22/2026Pictet Asset Management Holding SA7,413$0.25M0.0%N/A0.016%Search for SEC Filing on Google Icon
4/20/2026Assenagon Asset Management S.A.18,679$0.63M0.0%+110.1%0.039%Search for SEC Filing on Google Icon
4/17/2026Campbell Newman Asset Management Inc.64,337$2.18M0.2%+1.9%0.135%Search for SEC Filing on Google Icon
4/16/2026SG Americas Securities LLC35,385$1.20M0.0%-50.2%0.074%Search for SEC Filing on Google Icon
4/16/2026Diversified Trust Co13,936$0.47M0.0%+13.2%0.029%Search for SEC Filing on Google Icon
3/20/2026Hsbc Holdings PLC11,582$0.33M0.0%+29.3%0.024%Search for SEC Filing on Google Icon
3/17/2026Rockefeller Capital Management L.P.1,563$45K0.0%+45.9%0.003%Search for SEC Filing on Google Icon
3/13/2026Fund Advisors of America Inc FL11,053$0.32M0.3%N/A0.023%Search for SEC Filing on Google Icon
3/3/2026Caitong International Asset Management Co. Ltd2,092$60K0.0%N/A0.004%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.386,152$11.11M0.0%+35.3%0.811%Search for SEC Filing on Google Icon
2/18/2026Alpine Woods Capital Investors LLC23,026$0.66M0.2%N/A0.048%Search for SEC Filing on Google Icon
2/18/2026Skyview Financial Group LLC23,038$0.66M0.7%N/A0.048%Search for SEC Filing on Google Icon
2/18/2026Mackenzie Financial Corp40,245$1.16M0.0%+17.4%0.085%Search for SEC Filing on Google Icon
2/18/2026XTX Topco Ltd10,551$0.30M0.0%N/A0.022%Search for SEC Filing on Google Icon
2/18/2026Voloridge Investment Management LLC26,695$0.77M0.0%-84.4%0.056%Search for SEC Filing on Google Icon
2/18/2026Twinbeech Capital LP52,221$1.50M0.1%N/A0.110%Search for SEC Filing on Google Icon
2/18/2026Oxford Asset Management LLP21,186$0.61M0.2%+271.5%0.044%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC78,088$2.25M0.0%-36.3%0.164%Search for SEC Filing on Google Icon
2/18/2026Man Group plc36,094$1.04M0.0%+124.0%0.076%Search for SEC Filing on Google Icon
2/18/2026Janus Henderson Group PLC20,134$0.58M0.0%-48.8%0.042%Search for SEC Filing on Google Icon
2/18/2026Engineers Gate Manager LP36,587$1.05M0.0%-62.5%0.077%Search for SEC Filing on Google Icon
2/18/2026Atreides Management LP1,044,193$30.05M0.4%+35.3%2.193%Search for SEC Filing on Google Icon
2/18/2026Balyasny Asset Management L.P.152,795$4.40M0.0%N/A0.321%Search for SEC Filing on Google Icon
2/18/2026Boothbay Fund Management LLC13,990$0.40M0.0%N/A0.029%Search for SEC Filing on Google Icon
2/17/2026Freestone Grove Partners LP46,128$1.33M0.0%N/A0.097%Search for SEC Filing on Google Icon
2/17/2026Schonfeld Strategic Advisors LLC31,166$0.90M0.0%+93.5%0.065%Search for SEC Filing on Google Icon
2/17/2026PDT Partners LLC9,732$0.28M0.0%N/A0.020%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC145,965$4.20M0.0%-13.5%0.307%Search for SEC Filing on Google Icon
2/17/2026Cetera Investment Advisers11,425$0.33M0.0%-83.8%0.024%Search for SEC Filing on Google Icon
2/17/2026Amundi46,316$1.33M0.0%+11.0%0.097%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD274,844$7.91M0.0%-30.7%0.577%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.35,065$1.01M0.0%+56.6%0.074%Search for SEC Filing on Google Icon
2/17/2026State of Wisconsin Investment Board11,227$0.32M0.0%+75.3%0.024%Search for SEC Filing on Google Icon
2/17/2026ExodusPoint Capital Management LP70,751$2.04M0.0%N/A0.149%Search for SEC Filing on Google Icon
2/17/2026Royal Bank of Canada45,133$1.30M0.0%+4.1%0.095%Search for SEC Filing on Google Icon
2/17/2026Graham Capital Management L.P.10,066$0.29M0.0%N/A0.021%Search for SEC Filing on Google Icon
2/17/2026Rice Hall James & Associates LLC47,114$1.36M0.1%-22.4%0.099%Search for SEC Filing on Google Icon
2/16/2026Truvestments Capital LLC15,450$0.45M0.1%+14.2%0.032%Search for SEC Filing on Google Icon
2/16/2026Verition Fund Management LLC37,200$1.07M0.0%-47.7%0.078%Search for SEC Filing on Google Icon
2/16/2026Panagora Asset Management Inc.254,785$7.33M0.0%+25.8%0.535%Search for SEC Filing on Google Icon
2/16/2026Mariner LLC20,563$0.59M0.0%+55.5%0.043%Search for SEC Filing on Google Icon
2/16/2026Entropy Technologies LP13,457$0.39M0.0%+29.4%0.028%Search for SEC Filing on Google Icon
2/16/2026Barclays PLC73,805$2.12M0.0%+18.0%0.155%Search for SEC Filing on Google Icon
2/13/2026Kestra Advisory Services LLC6,923$0.20M0.0%-30.2%0.015%Search for SEC Filing on Google Icon
2/13/2026The Manufacturers Life Insurance Company 20,424$0.59M0.0%-9.7%0.043%Search for SEC Filing on Google Icon
2/13/2026AWM Investment Company Inc.754,220$21.71M2.1%+1.2%1.584%Search for SEC Filing on Google Icon
2/13/2026Essex Investment Management Co. LLC215,154$6.19M0.9%-12.4%0.452%Search for SEC Filing on Google Icon
2/13/2026First Trust Advisors LP682,967$19.66M0.0%+49.0%1.435%Search for SEC Filing on Google Icon
2/13/2026Headlands Technologies LLC34,308$0.99M0.1%N/A0.072%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.387,507$11.15M0.0%-0.2%0.814%Search for SEC Filing on Google Icon
2/13/2026Police & Firemen s Retirement System of New Jersey11,442$0.33M0.0%-5.2%0.024%Search for SEC Filing on Google Icon
2/13/2026State Street Corp1,192,093$34.31M0.0%+4.9%2.504%Search for SEC Filing on Google Icon
2/13/2026Dynamic Technology Lab Private Ltd69,225$1.99M0.5%N/A0.145%Search for SEC Filing on Google Icon
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC77,207$2.22M0.0%-6.6%0.162%Search for SEC Filing on Google Icon
2/13/2026ROI Financial Advisors LLC10,133$0.29M0.2%+7.6%0.021%Search for SEC Filing on Google Icon
2/12/2026Federation des caisses Desjardins du Quebec2,625$76K0.0%+275.0%0.006%Search for SEC Filing on Google Icon
2/12/2026HRT Financial LP69,724$2.01M0.0%+1,025.7%0.146%Search for SEC Filing on Google Icon
2/12/2026Brooklyn Investment Group13,863$0.41M0.0%N/A0.029%Search for SEC Filing on Google Icon
2/12/2026Commonwealth Equity Services LLC10,097$0.29M0.0%-27.4%0.021%Search for SEC Filing on Google Icon
2/12/2026Renaissance Technologies LLC139,989$4.03M0.0%-56.8%0.294%Search for SEC Filing on Google Icon
2/12/2026Dimensional Fund Advisors LP540,253$15.55M0.0%+14.6%1.135%Search for SEC Filing on Google Icon
2/12/2026Ensign Peak Advisors Inc4,550$0.13M0.0%-48.6%0.010%Search for SEC Filing on Google Icon
2/12/2026Steward Partners Investment Advisory LLC5,625$0.16M0.0%+114.3%0.012%Search for SEC Filing on Google Icon
2/12/2026New York State Common Retirement Fund70,400$2.03M0.0%+2.5%0.148%Search for SEC Filing on Google Icon
2/12/2026Campbell & CO Investment Adviser LLC59,952$1.73M0.1%N/A0.126%Search for SEC Filing on Google Icon
2/12/2026Alps Advisors Inc.62,242$1.79M0.0%-6.2%0.131%Search for SEC Filing on Google Icon
2/12/2026Swiss National Bank89,100$2.56M0.0%+5.3%0.187%Search for SEC Filing on Google Icon
2/12/2026Principal Securities Inc.8,636$0.25M0.0%+8.7%0.018%Search for SEC Filing on Google Icon
2/12/2026Polen Capital Management LLC23,565$0.68M0.0%-50.2%0.049%Search for SEC Filing on Google Icon
2/12/2026Nuveen LLC960,968$27.66M0.0%+16.3%2.018%Search for SEC Filing on Google Icon
2/11/2026Janney Montgomery Scott LLC46,381$1.34M0.0%+1.4%0.097%Search for SEC Filing on Google Icon
2/11/2026Deutsche Bank AG38,723$1.11M0.0%+7.2%0.081%Search for SEC Filing on Google Icon
2/11/2026Axiom Investors LLC DE134,076$3.86M0.0%-49.3%0.282%Search for SEC Filing on Google Icon
2/11/2026Fox Run Management L.L.C.14,944$0.43M0.1%-20.8%0.031%Search for SEC Filing on Google Icon
2/11/2026LPL Financial LLC40,074$1.15M0.0%-17.7%0.084%Search for SEC Filing on Google Icon
2/11/2026Franklin Resources Inc.35,072$1.01M0.0%+13,085.0%0.074%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
American Superconductor logo
American Superconductor Corporation, together with its subsidiaries, provides megawatt-scale power resiliency solutions worldwide. The company operates through Grid and Wind segments. The Grid segment offers products and services that enable electric utilities, industrial facilities, and renewable energy project developers to connect, transmit, and distribute power under the Gridtec Solutions brand. It provides transmission planning services, which identify power grid congestion, poor power quality, and other risks; grid interconnection solutions for wind farms and solar power plants, power quality systems, and transmission and distribution cable systems; D-VAR systems used for controlling power flow and voltage in the AC transmission system; actiVAR system, a fast-switching medium-voltage reactive compensation solution; armorVAR system installed for reactive compensation, power factor correction, loss reduction, utility bill savings, and mitigation of common power quality concerns related to power converter-based generation and load devices; and D-VAR volt var optimization (VVO) that serves the distribution power grid market. This segment also offers ship protection systems, which reduce a naval ship's magnetic signature; and ON board power delivery systems, power generation systems, and propulsion systems; and transformers and rectifiers systems. The Wind segment designs wind turbine systems and licenses these designs to third parties under the Windtec Solutions brand. It also supplies power electronics and software-based control systems, engineered designs, and support services; and provides customer support services to wind turbine manufacturers. This segment's design portfolio comprises a range of drivetrains and power ratings of 2 megawatts and higher. American Superconductor Corporation was incorporated in 1987 and is headquartered in Ayer, Massachusetts.
Read More on American Superconductor

Today's Range

Now: $51.84
Low: $48.86
High: $52.48

50 Day Range

MA: $41.91
Low: $28.73
High: $58.72

52 Week Range

Now: $51.84
Low: $24.00
High: $70.49

Volume

745,064 shs

Average Volume

1,351,539 shs

Market Capitalization

$2.47 billion

P/E Ratio

17.69

Dividend Yield

N/A

Beta

3.28

Who are the company insiders with the largest holdings of American Superconductor?

American Superconductor's top insider investors include:
  1. Daniel P Mcgahn (CEO)
  2. John W Kosiba Jr (CFO)
  3. David A Henry (CFO)
  4. David R Oliver Jr (Director)
  5. Arthur H House (Director)
  6. James F Maguire (EVP)
  7. Margaret D Klein (Director)
  8. Daniel P Mcgahn (Insider)
  9. David A Henry (CFO)
  10. David R Oliver, Jr (Director)
Learn More about top insider investors at American Superconductor.

Who are the major institutional investors of American Superconductor?

American Superconductor's top institutional investors include:
  1. First Trust Advisors LP — 1.63%
  2. Dimensional Fund Advisors LP — 1.38%
  3. Arrowstreet Capital Limited Partnership — 0.94%
  4. Emerald Mutual Fund Advisers Trust — 0.92%
  5. Stephens Investment Management Group LLC — 0.65%
  6. Sei Investments Co. — 0.47%
Learn More about top institutional investors of American Superconductor stock.

Which institutional investors are selling American Superconductor stock?

In the previous quarter, AMSC stock was sold by these institutional investors:
  1. Arrowstreet Capital Limited Partnership
  2. Allspring Global Investments Holdings LLC
  3. SG Americas Securities LLC
  4. Royal Bank of Canada
  5. Strs Ohio
  6. Bank of New York Mellon Corp
  7. Cetera Investment Advisers
  8. Kornitzer Capital Management Inc. KS
In the last year, company insiders that have sold American Superconductor company stock include:
  1. Daniel P Mcgahn (CEO)
  2. John W Kosiba Jr (CFO)
  3. David R Oliver Jr (Director)
  4. Arthur H House (Director)
Learn More investors selling American Superconductor stock.

Which institutional investors are buying American Superconductor stock?

Within the previous quarter, AMSC stock was acquired by institutional investors including:
  1. Sei Investments Co.
  2. Stephens Investment Management Group LLC
  3. Dimensional Fund Advisors LP
  4. First Trust Advisors LP
  5. Lazard Asset Management LLC
  6. Bank of America Corp DE
  7. PFG Investments LLC
  8. Amundi

American Superconductor Active Insiders

Daniel P Mcgahn
Daniel P Mcgahn
CEO
John W Kosiba Jr (Age 53)
CFO
Vikram S Budhraja
Director
Arthur H House
Arthur H House
Director
David R Oliver Jr
Director
1 recent trades