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AMSC Insider Trading

Insider Ownership Percentage: 4.80%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $10,941,815.23

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: $33.71
Price Change: ▲ Price Increase of +1.2 (3.69%)
As of 02/24/2026 05:00 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
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 JrDirectorBuy200$8.33$1,666.0060,907View SEC Filing Icon  
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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
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
2/11/2026JPMorgan Chase & Co.123,103$3.54M0.0%+7.2%0.259%Search for SEC Filing on Google Icon
2/11/2026Telemark Asset Management LLC619,900$17.84M1.8%-10.2%1.302%Search for SEC Filing on Google Icon
2/11/2026WINTON GROUP Ltd9,385$0.27M0.0%N/A0.020%Search for SEC Filing on Google Icon
2/11/2026Globeflex Capital L P21,633$0.62M0.1%N/A0.045%Search for SEC Filing on Google Icon
2/11/2026State of Wyoming3,021$87K0.0%N/A0.006%Search for SEC Filing on Google Icon
2/10/2026Goldman Sachs Group Inc.782,287$22.51M0.0%-33.4%1.643%Search for SEC Filing on Google Icon
2/10/2026AXQ Capital LP18,931$0.55M0.1%+146.9%0.040%Search for SEC Filing on Google Icon
2/10/2026Intech Investment Management LLC26,096$0.75M0.0%+30.4%0.055%Search for SEC Filing on Google Icon
2/9/2026Kingsview Wealth Management LLC6,995$0.20M0.0%+23.4%0.015%Search for SEC Filing on Google Icon
2/9/2026Geode Capital Management LLC1,090,710$31.40M0.0%+1.9%2.291%Search for SEC Filing on Google Icon
2/9/2026Royce & Associates LP387,069$11.14M0.1%+8.2%0.813%Search for SEC Filing on Google Icon
2/9/2026Legal & General Group Plc278,026$8M0.0%+7.1%0.584%Search for SEC Filing on Google Icon
2/6/2026GPS Wealth Strategies Group LLC2,275$65K0.1%-80.1%0.005%Search for SEC Filing on Google Icon
2/6/2026Legato Capital Management LLC40,687$1.17M0.1%-30.9%0.090%Search for SEC Filing on Google Icon
2/6/2026Global Retirement Partners LLC1,978$57K0.0%-38.4%0.004%Search for SEC Filing on Google Icon
2/6/2026Handelsbanken Fonder AB8,600$0.25M0.0%N/A0.019%Search for SEC Filing on Google Icon
2/6/2026ProShare Advisors LLC11,654$0.34M0.0%+35.0%0.026%Search for SEC Filing on Google Icon
2/6/2026HighTower Advisors LLC10,479$0.30M0.0%+79.7%0.023%Search for SEC Filing on Google Icon
2/5/2026Stephens Investment Management Group LLC174,228$5.01M0.1%+156.6%0.386%Search for SEC Filing on Google Icon
2/4/2026VIRGINIA RETIREMENT SYSTEMS ET Al16,500$0.48M0.0%N/A0.037%Search for SEC Filing on Google Icon
2/3/2026F m Investments LLC13,470$0.39M0.0%N/A0.030%Search for SEC Filing on Google Icon
2/3/2026Lumbard & Kellner LLC71,161$2.05M0.7%-1.8%0.157%Search for SEC Filing on Google Icon
2/3/2026Mitsubishi UFJ Asset Management Co. Ltd.13,277$0.42M0.0%+12.4%0.029%Search for SEC Filing on Google Icon
2/3/2026SBI Securities Co. Ltd.2,693$78K0.0%-21.0%0.006%Search for SEC Filing on Google Icon
2/2/2026Truist Financial Corp32,700$0.94M0.0%+28.2%0.072%Search for SEC Filing on Google Icon
2/2/2026Strs Ohio21,200$0.61M0.0%+29.3%0.047%Search for SEC Filing on Google Icon
2/2/2026Kornitzer Capital Management Inc. KS36,154$1.04M0.0%+9.6%0.080%Search for SEC Filing on Google Icon
1/30/2026Precision Wealth Strategies LLC8,137$0.23M0.1%N/A0.018%Search for SEC Filing on Google Icon
1/29/2026D.A. Davidson & CO.7,008$0.20M0.0%+11.6%0.016%Search for SEC Filing on Google Icon
1/29/2026UBS Group AG744,563$21.43M0.0%+284.3%1.648%Search for SEC Filing on Google Icon
1/29/2026Vanguard Group Inc.3,526,632$101.50M0.0%+19.6%7.804%Search for SEC Filing on Google Icon
1/28/2026Arizona State Retirement System12,524$0.36M0.0%-2.8%0.028%Search for SEC Filing on Google Icon
1/28/2026Universal Beteiligungs und Servicegesellschaft mbH14,181$0.41M0.0%-82.1%0.031%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: $33.71
Low: $32.05
High: $34.24

50 Day Range

MA: $31.32
Low: $25.95
High: $36.66

52 Week Range

Now: $33.71
Low: $13.98
High: $70.49

Volume

820,594 shs

Average Volume

1,201,503 shs

Market Capitalization

$1.60 billion

P/E Ratio

11.51

Dividend Yield

N/A

Beta

2.98

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. Arthur H House (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. Vanguard Group Inc. — 7.80%
  2. Baillie Gifford & Co. — 3.33%
  3. State Street Corp — 2.50%
  4. Geode Capital Management LLC — 2.29%
  5. Atreides Management LP — 2.19%
  6. Nuveen LLC — 2.02%
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. Goldman Sachs Group Inc.
  2. Renaissance Technologies LLC
  3. Voloridge Investment Management LLC
  4. Axiom Investors LLC DE
  5. Price T Rowe Associates Inc. MD
  6. IMC Chicago LLC
  7. Telemark Asset Management LLC
  8. Universal Beteiligungs und Servicegesellschaft mbH
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. 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. Vanguard Group Inc.
  2. UBS Group AG
  3. Atreides Management LP
  4. First Trust Advisors LP
  5. Balyasny Asset Management L.P.
  6. Nuveen LLC
  7. Stephens Investment Management Group LLC
  8. Invesco Ltd.