AMSC Insider Trading

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Insider Trading History
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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

American Superconductor Share Price & Price History

^$33.01

▲ +0.97 (3.03%)

As of 12/4/2025 05:00 PM ET

Days: 30 | 90 | 365

American Superconductor Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
8/8/2025	Arthur H House	Director	Sell	9,703	$50.92	$494,076.76	48,663
8/4/2025	Daniel P Mcgahn	CEO	Sell	100,848	$54.49	$5,495,207.52	1,183,134
6/6/2025	Daniel P Mcgahn	CEO	Sell	7,689	$31.82	$244,663.98	1,296,797
6/6/2025	John W. Kosiba, Jr.	CFO	Sell	4,744	$31.83	$151,001.52	409,532
5/27/2025	Daniel P Mcgahn	CEO	Sell	122,655	$26.39	$3,236,865.45	1,304,486
5/27/2025	John W. Kosiba, Jr.	CFO	Sell	50,000	$26.40	$1,320,000.00	414,276
6/11/2024	Daniel P Mcgahn	CEO	Sell	37,165	$21.69	$806,108.85	1,019,956
6/11/2024	John W. Kosiba, Jr.	CFO	Sell	32,000	$21.68	$693,760.00	316,136
5/21/2024	Daniel P Mcgahn	CEO	Sell	20,559	$14.82	$304,684.38	1,057,121
5/21/2024	John W. Kosiba, Jr.	CFO	Sell	29,000	$14.82	$429,780.00	348,136
6/22/2023	Daniel P Mcgahn	CEO	Sell	36,902	$5.95	$219,566.90	1,077,680
6/21/2023	John W. Kosiba, Jr.	CFO	Sell	50,132	$6.15	$308,311.80	407,014
12/16/2022	Daniel P Mcgahn	CEO	Buy	25,000	$3.49	$87,250.00	943,223
12/12/2022	John W. Kosiba, Jr.	CFO	Buy	25,000	$3.34	$83,500.00	338,759
8/4/2022	Margaret D Klein	Director	Buy	500	$5.57	$2,785.00	16,376
6/18/2019	David R Oliver Jr	Director	Buy	200	$8.33	$1,666.00	60,907

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

American Superconductor Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
11/21/2025	CIBC Bancorp USA Inc.	4,659	$0.28M	0.0%	N/A	0.010%
11/19/2025	Stance Capital LLC	2,606	$0.16M	0.1%	N/A	0.006%
11/17/2025	Oberweis Asset Management Inc.	665,700	$39.54M	1.5%	-0.4%	1.473%
11/17/2025	NewEdge Advisors LLC	9,641	$0.57M	0.0%	+1,695.3%	0.021%
11/17/2025	Castleark Management LLC	135,617	$8.05M	0.2%	+24.2%	0.300%
11/17/2025	Dark Forest Capital Management LP	23,858	$1.42M	0.0%	-31.3%	0.053%
11/17/2025	Virtus Advisers LLC	25,990	$1.54M	1.0%	+1,277.3%	0.058%
11/17/2025	Voloridge Investment Management LLC	171,606	$10.19M	0.0%	N/A	0.380%
11/17/2025	Verition Fund Management LLC	71,186	$4.23M	0.0%	+91.4%	0.158%
11/17/2025	Scientech Research LLC	6,585	$0.39M	0.1%	N/A	0.015%
11/17/2025	Qube Research & Technologies Ltd	257,595	$15.30M	0.0%	+98.0%	0.570%
11/17/2025	Mariner LLC	13,227	$0.79M	0.0%	+7.6%	0.029%
11/17/2025	Millennium Management LLC	122,502	$7.28M	0.0%	-51.4%	0.271%
11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	30,067	$1.79M	0.0%	+21.7%	0.067%
11/17/2025	Focus Partners Wealth	32,919	$1.95M	0.0%	N/A	0.073%
11/17/2025	Cinctive Capital Management LP	5,256	$0.31M	0.0%	N/A	0.012%
11/17/2025	Atreides Management LP	771,495	$45.82M	0.9%	-30.1%	1.707%
11/17/2025	Bank of America Corp DE	198,030	$11.76M	0.0%	+17.1%	0.438%
11/17/2025	Aquatic Capital Management LLC	53,873	$3.20M	0.1%	+63.1%	0.119%
11/17/2025	ArrowMark Colorado Holdings LLC	110,432	$6.56M	0.1%	-29.4%	0.244%
11/17/2025	Algert Global LLC	287,880	$17.10M	0.3%	+39.9%	0.637%
11/17/2025	Alliancebernstein L.P.	39,320	$2.34M	0.0%	+10.1%	0.087%
11/17/2025	Ameriprise Financial Inc.	19,021	$1.13M	0.0%	N/A	0.042%
11/14/2025	Schonfeld Strategic Advisors LLC	16,110	$0.96M	0.0%	N/A	0.036%
11/14/2025	Creative Planning	7,044	$0.42M	0.0%	+24.0%	0.016%
11/14/2025	Credit Agricole S A	21,535	$1.28M	0.0%	N/A	0.048%
11/14/2025	Amundi	41,730	$2.55M	0.0%	-4.9%	0.092%
11/14/2025	Man Group plc	16,114	$0.96M	0.0%	-14.8%	0.036%
11/14/2025	Occudo Quantitative Strategies LP	4,100	$0.24M	0.0%	-62.6%	0.009%
11/14/2025	Zurcher Kantonalbank Zurich Cantonalbank	17,806	$1.06M	0.0%	+19.4%	0.039%
11/14/2025	UBS AM A Distinct Business Unit of UBS Asset Management Americas LLC	82,637	$4.91M	0.0%	-38.4%	0.183%
11/14/2025	Cim LLC	4,632	$0.28M	0.0%	N/A	0.010%
11/14/2025	Two Sigma Investments LP	121,623	$7.22M	0.0%	-1.0%	0.269%
11/14/2025	Ghisallo Capital Management LLC	100,000	$5.94M	0.2%	-50.0%	0.221%
11/14/2025	Wellington Management Group LLP	399,246	$23.71M	0.0%	-7.5%	0.884%
11/14/2025	Comerica Bank	18,808	$1.12M	0.0%	+232.2%	0.042%
11/13/2025	Jump Financial LLC	117,498	$6.98M	0.1%	-8.7%	0.260%
11/13/2025	Entropy Technologies LP	10,401	$0.62M	0.0%	+16.9%	0.023%
11/13/2025	Kennedy Capital Management LLC	64,601	$3.84M	0.1%	-55.8%	0.143%
11/13/2025	Invesco Ltd.	285,406	$16.95M	0.0%	+79.2%	0.632%
11/13/2025	Arrowstreet Capital Limited Partnership	760,457	$45.16M	0.0%	+221.7%	1.683%
11/13/2025	Sei Investments Co.	66,198	$3.93M	0.0%	+57.3%	0.146%
11/13/2025	UBS Group AG	193,734	$11.51M	0.0%	-2.4%	0.429%
11/13/2025	BNP Paribas Financial Markets	63,009	$3.74M	0.0%	+707.7%	0.139%
11/13/2025	Mackenzie Financial Corp	34,289	$2.04M	0.0%	-31.1%	0.076%
11/13/2025	Legal & General Group Plc	259,563	$15.42M	0.0%	-37.8%	0.574%
11/13/2025	Swiss National Bank	84,600	$5.02M	0.0%	+1.6%	0.187%
11/13/2025	Russell Investments Group Ltd.	22,393	$1.33M	0.0%	+189.5%	0.050%
11/13/2025	Private Advisor Group LLC	37,683	$2.24M	0.0%	N/A	0.083%
11/13/2025	First Trust Advisors LP	458,391	$27.22M	0.0%	+35.8%	1.014%
11/13/2025	Neo Ivy Capital Management	13,520	$0.80M	0.2%	N/A	0.030%
11/12/2025	Barclays PLC	62,563	$3.72M	0.0%	-22.1%	0.138%
11/12/2025	Integrated Quantitative Investments LLC	9,333	$0.55M	0.2%	-20.8%	0.021%
11/12/2025	Dimensional Fund Advisors LP	471,484	$28.01M	0.0%	-1.9%	1.043%
11/12/2025	Legato Capital Management LLC	58,848	$3.50M	0.4%	-25.1%	0.130%
11/12/2025	Victory Capital Management Inc.	41,389	$2.46M	0.0%	N/A	0.092%
11/12/2025	Royce & Associates LP	357,580	$21.24M	0.2%	-55.9%	0.791%
11/12/2025	Quantbot Technologies LP	26,831	$1.59M	0.0%	+257.7%	0.059%
11/12/2025	Xponance Inc.	3,379	$0.20M	0.0%	N/A	0.007%
11/12/2025	Mitsubishi UFJ Asset Management Co. Ltd.	11,808	$0.70M	0.0%	-10.1%	0.026%
11/12/2025	Intech Investment Management LLC	20,007	$1.19M	0.0%	-24.1%	0.044%
11/12/2025	Fox Run Management L.L.C.	18,861	$1.12M	0.2%	-49.7%	0.042%
11/10/2025	Counterpoint Mutual Funds LLC	8,206	$0.49M	0.0%	-30.9%	0.018%
11/10/2025	AXQ Capital LP	7,667	$0.46M	0.2%	N/A	0.017%
11/10/2025	ROI Financial Advisors LLC	9,419	$0.56M	0.3%	+32.3%	0.021%
11/10/2025	Quantum Private Wealth LLC	29,223	$1.74M	0.5%	+6.6%	0.065%
11/7/2025	GSA Capital Partners LLP	15,798	$0.94M	0.1%	+111.4%	0.035%
11/7/2025	Merit Financial Group LLC	31,855	$1.89M	0.0%	-36.2%	0.071%
11/7/2025	Vanguard Group Inc.	2,949,801	$175.19M	0.0%	+20.5%	6.532%
11/7/2025	JPMorgan Chase & Co.	114,888	$6.82M	0.0%	+106.5%	0.254%
11/7/2025	PNC Financial Services Group Inc.	4,542	$0.27M	0.0%	+13.6%	0.010%
11/6/2025	Cornerstone Investment Partners LLC	6,102	$0.36M	0.0%	-8.5%	0.014%
11/6/2025	Rhumbline Advisers	70,425	$4.18M	0.0%	+15.1%	0.156%
11/6/2025	Baader Bank Aktiengesellschaft	7,063	$0.42M	0.0%	N/A	0.016%
11/6/2025	Essex Investment Management Co. LLC	245,581	$14.59M	2.2%	-29.0%	0.544%
11/6/2025	ProShare Advisors LLC	8,634	$0.51M	0.0%	-9.8%	0.019%
11/6/2025	Oppenheimer & Co. Inc.	20,100	$1.19M	0.0%	-53.9%	0.045%
11/5/2025	Alps Advisors Inc.	66,325	$3.94M	0.0%	+2.6%	0.147%
11/5/2025	SBI Securities Co. Ltd.	3,408	$0.20M	0.0%	-11.9%	0.008%
11/4/2025	Penserra Capital Management LLC	57,728	$3.43M	0.0%	-15.5%	0.128%
11/4/2025	Jones Financial Companies Lllp	5,839	$0.34M	0.0%	+30.2%	0.013%
11/4/2025	Prostatis Group LLC	6,011	$0.36M	0.1%	-17.4%	0.013%
11/4/2025	Meridian Wealth Management LLC	91,102	$5.41M	0.2%	N/A	0.202%
11/4/2025	Principal Financial Group Inc.	39,403	$2.34M	0.0%	N/A	0.087%
11/4/2025	Lisanti Capital Growth LLC	118,151	$7.02M	1.7%	-34.6%	0.262%
11/3/2025	Arizona State Retirement System	12,883	$0.77M	0.0%	+3.6%	0.029%
11/3/2025	GPS Wealth Strategies Group LLC	11,437	$0.68M	0.1%	+11.0%	0.025%
11/3/2025	New York State Common Retirement Fund	68,700	$4.08M	0.0%	-0.9%	0.152%
11/3/2025	Traynor Capital Management Inc.	16,410	$0.98M	0.1%	N/A	0.036%
11/3/2025	Truist Financial Corp	25,500	$1.51M	0.0%	+14.5%	0.056%
10/31/2025	Kornitzer Capital Management Inc. KS	33,000	$1.96M	0.0%	-10.0%	0.073%
10/31/2025	Vanguard Personalized Indexing Management LLC	3,385	$0.20M	0.0%	N/A	0.007%
10/31/2025	Baillie Gifford & Co.	1,427,332	$84.77M	0.1%	-1.7%	3.161%
10/30/2025	Palisades Investment Partners LLC	141,109	$8.38M	3.3%	+0.4%	0.312%
10/30/2025	Teacher Retirement System of Texas	13,148	$0.78M	0.0%	+119.7%	0.029%
10/30/2025	Strs Ohio	16,400	$0.97M	0.0%	-16.3%	0.036%
10/30/2025	Emerald Mutual Fund Advisers Trust	307,737	$18.28M	0.9%	+43.9%	0.681%
10/30/2025	Emerald Advisers LLC	521,183	$30.95M	1.0%	+4.2%	1.154%
10/30/2025	Universal Beteiligungs und Servicegesellschaft mbH	79,079	$4.70M	0.0%	+697.7%	0.175%
10/29/2025	Wealth Enhancement Advisory Services LLC	5,484	$0.31M	0.0%	N/A	0.012%

Data available starting January 2016

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.

Today's Range

Now: $33.01

$31.70

$33.50

50 Day Range

MA: $48.34

$29.78

$66.68

52 Week Range

Now: $33.01

$13.98

$70.49

Volume

737,416 shs

Average Volume

1,305,813 shs

Market Capitalization

$1.49 billion

P/E Ratio

89.22

Dividend Yield

N/A

Beta

2.97

Who are the company insiders with the largest holdings of American Superconductor?: American Superconductor's top insider investors include:
Daniel P Mcgahn (CEO)
John W Kosiba Jr (CFO)
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:
Vanguard Group Inc. — 6.53%
Baillie Gifford & Co. — 3.16%
Atreides Management LP — 1.71%
Arrowstreet Capital Limited Partnership — 1.68%
Oberweis Asset Management Inc. — 1.47%
Emerald Advisers LLC — 1.15%
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:
Royce & Associates LP
Heights Capital Management Inc.
Atreides Management LP
Legal & General Group Plc
Millennium Management LLC
Essex Investment Management Co. LLC
Ghisallo Capital Management LLC
Kennedy Capital Management LLC
In the last year, company insiders that have sold American Superconductor company stock include:
Daniel P Mcgahn (CEO)
John W Kosiba Jr (CFO)
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:
Arrowstreet Capital Limited Partnership
Vanguard Group Inc.
Voloridge Investment Management LLC
Qube Research & Technologies Ltd
Invesco Ltd.
First Trust Advisors LP
Wolverine Trading LLC
Emerald Mutual Fund Advisers Trust