American Superconductor (AMSC) Institutional Ownership

$27.28 -2.25 (-7.62%)

Closing price 04:00 PM Eastern

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$27.64 +0.36 (+1.30%)

As of 07:59 PM Eastern

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Current Institutional Ownership Percentage: 52.28%
Number of Institutional Buyers (last 12 months): 158
Total Institutional Inflows (last 12 months): $437.27M

Number of Institutional Sellers (last 12 months): 79
Total Institutional Outflows (last 12 months): $172.39M

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AMSC Institutional Buying and Selling by Quarter

American Superconductor Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
9/9/2026	Tidal Investments LLC	101,341	$4.21M	0.0%	+133.7%	0.209%
9/9/2026	Integrated Wealth Concepts LLC	3,839	$159K	0.0%	N/A	0.008%
9/9/2026	Baird Financial Group Inc.	157,203	$6.53M	0.0%	-3.7%	0.325%
9/8/2026	Nykredit A S	1,111	$46K	0.0%	N/A	0.002%
8/27/2026	Corient Private Wealth LP	5,372	$223K	0.0%	N/A	0.011%
8/24/2026	California State Teachers Retirement System	2,112,361	$87.68M	0.0%	+3,604.9%	4.361%
8/21/2026	Round Rock Advisors LLC	26,431	$1.10M	0.1%	+29.9%	0.055%
8/21/2026	Nykredit A S	1,111	$46K	0.0%	N/A	0.002%
8/19/2026	Wellington Management Group LLP	85,244	$3.54M	0.0%	N/A	0.176%
8/15/2026	AWM Investment Company Inc.	951,604	$39.50M	3.4%	N/A	1.965%
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8/13/2026	Ranger Investment Management L.P.	405,266	$16.82M	1.1%	N/A	0.837%
8/13/2026	Globeflex Capital L P	14,510	$602K	0.1%	N/A	0.030%
7/9/2026	Hennion & Walsh Asset Management Inc.	46,020	$1.91M	0.1%	+38.0%	0.095%
7/8/2026	Assenagon Asset Management S.A.	6,224	$258K	0.0%	-66.7%	0.013%
7/7/2026	Central Pacific Bank Trust Division	16,266	$675K	0.1%	+77.3%	0.034%
6/2/2026	Optiver Holding B.V.	1,882	$64K	0.0%	N/A	0.004%
5/19/2026	Bank of America Corp DE	209,451	$7.09M	0.0%	+26.5%	0.440%
5/18/2026	Amundi	58,169	$1.97M	0.0%	+25.6%	0.122%
5/18/2026	California State Teachers Retirement System	57,016	$1.93M	0.0%	+12.0%	0.120%
5/18/2026	ROI Financial Advisors LLC	10,731	$363K	0.2%	+5.9%	0.023%
5/18/2026	Royal Bank of Canada	31,336	$1.06M	0.0%	-30.6%	0.066%
5/16/2026	The Manufacturers Life Insurance Company	20,828	$705K	0.0%	+2.0%	0.044%
5/16/2026	Lazard Asset Management LLC	56,452	$1.91M	0.0%	N/A	0.119%
5/14/2026	Arrowstreet Capital Limited Partnership	446,752	$15.12M	0.0%	-34.6%	0.938%
5/14/2026	Sei Investments Co.	224,436	$7.60M	0.0%	+184.8%	0.471%
5/14/2026	State of Wyoming	4,624	$157K	0.0%	+53.1%	0.010%
5/13/2026	Cetera Investment Advisers	10,023	$339K	0.0%	-12.3%	0.021%
5/13/2026	First Trust Advisors LP	778,268	$26.34M	0.0%	+14.0%	1.635%
5/7/2026	Dimensional Fund Advisors LP	658,297	$22.28M	0.0%	+21.8%	1.383%
5/7/2026	Morgan Dempsey Capital Management LLC	8,510	$288K	0.1%	N/A	0.018%
5/6/2026	Allspring Global Investments Holdings LLC	149,601	$4.88M	0.0%	-26.9%	0.314%
5/5/2026	D.A. Davidson & CO.	6,794	$230K	0.0%	-3.1%	0.014%
5/5/2026	Bank of New York Mellon Corp	134,790	$4.56M	0.0%	-1.6%	0.283%
5/4/2026	Emerald Mutual Fund Advisers Trust	438,875	$14.86M	0.7%	+0.8%	0.922%
5/1/2026	Kornitzer Capital Management Inc. KS	34,973	$1.18M	0.0%	-3.3%	0.073%
4/28/2026	Stephens Investment Management Group LLC	308,515	$10.44M	0.1%	+77.1%	0.648%
4/27/2026	PFG Investments LLC	15,830	$536K	0.0%	N/A	0.033%
4/25/2026	Strs Ohio	17,700	$599K	0.0%	-16.5%	0.037%
4/24/2026	Acorn Financial Advisory Services Inc. ADV	6,004	$203K	0.0%	N/A	0.013%
4/22/2026	Janney Montgomery Scott LLC	56,946	$1.93M	0.0%	+22.8%	0.120%
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4/22/2026	Pictet Asset Management Holding SA	7,413	$251K	0.0%	N/A	0.016%
4/20/2026	Assenagon Asset Management S.A.	18,679	$632K	0.0%	+110.1%	0.039%
4/17/2026	Campbell Newman Asset Management Inc.	64,337	$2.18M	0.2%	+1.9%	0.135%
4/16/2026	SG Americas Securities LLC	35,385	$1.20M	0.0%	-50.2%	0.074%
4/16/2026	Diversified Trust Co	13,936	$472K	0.0%	+13.2%	0.029%
3/20/2026	Hsbc Holdings PLC	11,582	$334K	0.0%	+29.3%	0.024%
3/17/2026	Rockefeller Capital Management L.P.	1,563	$45K	0.0%	+45.9%	0.003%
3/13/2026	Fund Advisors of America Inc FL	11,053	$318K	0.3%	N/A	0.023%
3/3/2026	Caitong International Asset Management Co. Ltd	2,092	$60K	0.0%	N/A	0.004%
2/19/2026	Invesco Ltd.	386,152	$11.11M	0.0%	+35.3%	0.811%
2/18/2026	Alpine Woods Capital Investors LLC	23,026	$663K	0.2%	N/A	0.048%
2/18/2026	Skyview Financial Group LLC	23,038	$663K	0.7%	N/A	0.048%
2/18/2026	Mackenzie Financial Corp	40,245	$1.16M	0.0%	+17.4%	0.085%
2/18/2026	XTX Topco Ltd	10,551	$304K	0.0%	N/A	0.022%
2/18/2026	Voloridge Investment Management LLC	26,695	$768K	0.0%	-84.4%	0.056%
2/18/2026	Twinbeech Capital LP	52,221	$1.50M	0.1%	N/A	0.110%
2/18/2026	Oxford Asset Management LLP	21,186	$610K	0.2%	+271.5%	0.044%
2/18/2026	Millennium Management LLC	78,088	$2.25M	0.0%	-36.3%	0.164%
2/18/2026	Man Group plc	36,094	$1.04M	0.0%	+124.0%	0.076%
2/18/2026	Janus Henderson Group PLC	20,134	$580K	0.0%	-48.8%	0.042%
2/18/2026	Engineers Gate Manager LP	36,587	$1.05M	0.0%	-62.5%	0.077%
2/18/2026	Atreides Management LP	1,044,193	$30.05M	0.4%	+35.3%	2.193%
2/18/2026	Balyasny Asset Management L.P.	152,795	$4.40M	0.0%	N/A	0.321%
2/18/2026	Boothbay Fund Management LLC	13,990	$403K	0.0%	N/A	0.029%
2/17/2026	Freestone Grove Partners LP	46,128	$1.33M	0.0%	N/A	0.097%
2/17/2026	Schonfeld Strategic Advisors LLC	31,166	$897K	0.0%	+93.5%	0.065%
2/17/2026	PDT Partners LLC	9,732	$280K	0.0%	N/A	0.020%
2/17/2026	AQR Capital Management LLC	145,965	$4.20M	0.0%	-13.5%	0.307%
2/17/2026	Cetera Investment Advisers	11,425	$329K	0.0%	-83.8%	0.024%
2/17/2026	Amundi	46,316	$1.33M	0.0%	+11.0%	0.097%
2/17/2026	Price T Rowe Associates Inc. MD	274,844	$7.91M	0.0%	-30.7%	0.577%
2/17/2026	Russell Investments Group Ltd.	35,065	$1.01M	0.0%	+56.6%	0.074%
2/17/2026	State of Wisconsin Investment Board	11,227	$323K	0.0%	+75.3%	0.024%
2/17/2026	ExodusPoint Capital Management LP	70,751	$2.04M	0.0%	N/A	0.149%
2/17/2026	Royal Bank of Canada	45,133	$1.30M	0.0%	+4.1%	0.095%
2/17/2026	Graham Capital Management L.P.	10,066	$290K	0.0%	N/A	0.021%
2/17/2026	Rice Hall James & Associates LLC	47,114	$1.36M	0.1%	-22.4%	0.099%
2/16/2026	Truvestments Capital LLC	15,450	$445K	0.1%	+14.2%	0.032%
2/16/2026	Verition Fund Management LLC	37,200	$1.07M	0.0%	-47.7%	0.078%
2/16/2026	Panagora Asset Management Inc.	254,785	$7.33M	0.0%	+25.8%	0.535%
2/16/2026	Mariner LLC	20,563	$592K	0.0%	+55.5%	0.043%
2/16/2026	Entropy Technologies LP	13,457	$387K	0.0%	+29.4%	0.028%
2/16/2026	Barclays PLC	73,805	$2.12M	0.0%	+18.0%	0.155%
2/13/2026	Kestra Advisory Services LLC	6,923	$199K	0.0%	-30.2%	0.015%
2/13/2026	The Manufacturers Life Insurance Company	20,424	$588K	0.0%	-9.7%	0.043%
2/13/2026	AWM Investment Company Inc.	754,220	$21.71M	2.1%	+1.2%	1.584%
2/13/2026	Essex Investment Management Co. LLC	215,154	$6.19M	0.9%	-12.4%	0.452%
2/13/2026	First Trust Advisors LP	682,967	$19.66M	0.0%	+49.0%	1.435%
2/13/2026	Headlands Technologies LLC	34,308	$987K	0.1%	N/A	0.072%
2/13/2026	Charles Schwab Investment Management Inc.	387,507	$11.15M	0.0%	-0.2%	0.814%
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2/13/2026	Police & Firemen s Retirement System of New Jersey	11,442	$329K	0.0%	-5.2%	0.024%
2/13/2026	State Street Corp	1,192,093	$34.31M	0.0%	+4.9%	2.504%
2/13/2026	Dynamic Technology Lab Private Ltd	69,225	$1.99M	0.5%	N/A	0.145%
2/13/2026	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	77,207	$2.22M	0.0%	-6.6%	0.162%
2/13/2026	ROI Financial Advisors LLC	10,133	$292K	0.2%	+7.6%	0.021%
2/12/2026	Federation des caisses Desjardins du Quebec	2,625	$76K	0.0%	+275.0%	0.006%
2/12/2026	HRT Financial LP	69,724	$2.01M	0.0%	+1,025.7%	0.146%
2/12/2026	Brooklyn Investment Group	13,863	$405K	0.0%	N/A	0.029%
2/12/2026	Commonwealth Equity Services LLC	10,097	$291K	0.0%	-27.4%	0.021%
2/12/2026	Renaissance Technologies LLC	139,989	$4.03M	0.0%	-56.8%	0.294%

AMSC Institutional Ownership - Frequently Asked Questions

During the previous two years, 270 institutional investors and hedge funds held shares of American Superconductor. The most heavily invested institutionals were Vanguard Group Inc. ($101.50M), California State Teachers Retirement System ($87.68M), Baillie Gifford & Co. ($43.37M), Hood River Capital Management LLC ($42.89M), Oberweis Asset Management Inc. ($39.54M), AWM Investment Company Inc. ($39.50M), and State Street Corp ($34.31M).Learn more on American Superconductor's institutional investors.

52.28% of American Superconductor's stock is owned by institutional investors. Learn more on AMSC's institutional investor holdings.

Of the 242 institutional investors that purchased American Superconductor's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: California State Teachers Retirement System ($2.08M), Atreides Management LP ($1.38M), Vanguard Group Inc. ($1.14M), Arrowstreet Capital Limited Partnership ($1.06M), Wellington Management Group LLP ($1.01M), AWM Investment Company Inc. ($1.01M), and Nuveen LLC ($913.38K).

Institutional investors have bought a total of 10,463,405 shares in the last 24 months. This purchase volume represents approximately $437.27M in transactions.

Of the 79 institutional investors that sold American Superconductor's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Royce & Associates LP ($454.15K), Goldman Sachs Group Inc. ($391.82K), Atreides Management LP ($332.96K), Arrowstreet Capital Limited Partnership ($236.45K), Renaissance Technologies LLC ($184K), Millennium Management LLC ($173.72K), and Legal & General Group Plc ($157.48K).

Institutional investors have sold a total of 3,825,563 shares in the last 24 months. This volume of shares sold represents approximately $172.39M in transactions.

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Institutional ownership data for NASDAQ:AMSC is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/9/2026. New 13F filings are added each quarter as they're published.

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American Superconductor (AMSC) Institutional Ownership

AMSC Institutional Buying and Selling by Quarter

American Superconductor Major Shareholders & Ownership History

AMSC Institutional Ownership - Frequently Asked Questions

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American Superconductor (AMSC) Institutional Ownership

Institutional Ownership Changes (13F Filings) for American Superconductor (NASDAQ:AMSC)

AMSC Institutional Buying and Selling by Quarter

American Superconductor Major Shareholders & Ownership History

AMSC Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of AMSC shares?

What percentage of American Superconductor's stock is owned by institutional investors?

Which institutional investors have been buying American Superconductor's stock?

How much institutional buying is happening at American Superconductor?

Which of American Superconductor's major shareholders have been selling company stock?

How much institutional selling is happening at American Superconductor?

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