American Superconductor Corp /De/ (AMSC) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

2,453,010Shares held by institutions

$79,011,452Value of institutional holdings

79.96%Institutional ownership %

9.39%Shares Changed QoQ

228No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

American Superconductor Corp /De/ (NASDAQ:AMSC) is held by 234 institutional investors per 13F filings through December 2025.

Collectively, these holders controlled 72.9% of American Superconductor's outstanding shares in December 2025, down from 75.3% in September 2025.
Their total shares held in AMSC increased 11.08% quarter over quarter, and separately, investors owning American Superconductor increased 23.81% from a year ago.
Of these 234 funds, 143 grew their exposure to American Superconductor, 64 cut back, and 27 maintained positions.
Altogether, these fund groups held 32.78Mn shares in AMSC by December 2025, up by 3.27Mn shares quarter on quarter, and up 3.79Mn shares year over year.
BlackRock, Inc. leads ownership in AMSC with 3.75Mn shares as of December 31, 2025, equal to 8.35% of outstanding shares.
The largest buyers of American Superconductor for the quarter ending December 2025 were VANGUARD GROUP INC (576.83K), UBS Group AG (550.83K), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (459.79K), Morgan Stanley (369.68K), Qube Research & Technologies Ltd (341.41K).
Top sellers of AMSC stock for the quarter ending December 2025 included DRIEHAUS CAPITAL MANAGEMENT LLC (718.96K), Goldman Sachs Group Inc (391.82K), D. E. Shaw & Co., Inc. (309.56K), Bank Of America Corp /De/ (230.49K), RENAISSANCE TECHNOLOGIES LLC (184.0K).
American Superconductor's 10 largest shareholders as of December 2025 include BlackRock, Inc. (3.75Mn), VANGUARD GROUP INC (3.53Mn), BAILLIE GIFFORD & CO (1.51Mn), State Street Corp (1.19Mn), GEODE CAPITAL MANAGEMENT, LLC (1.09Mn), Atreides Management, LP (1.04Mn), Nuveen, LLC (960.97K), OBERWEIS ASSET MANAGEMENT INC/ (835.9K), Goldman Sachs Group Inc (782.29K), EMERALD ADVISERS, LLC (757.57K) per Business Quant data.

235 Institutional Holders

2,453,010 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	121,107	3.34%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	576,831	19.55%	$0.00
Atreides Management, LP	31 Dec, 2025	272,698	35.35%	$0.00
Barclays Plc	31 Dec, 2025	-47,086	-38.95%	$0.00
BAILLIE GIFFORD & CO	31 Dec, 2025	79,509	5.57%	$0.00
Nuveen, LLC	31 Dec, 2025	134,816	16.32%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	14,207	158.61%	$0.00
State Street Corp	31 Dec, 2025	56,215	4.95%	$0.00
UBS Group AG	31 Dec, 2025	550,829	284.32%	$0.00
Fund Advisors of America Inc/FL	31 Dec, 2025	11,053	0.00%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	20,855	1.95%	$0.00
Qube Research & Technologies Ltd	31 Dec, 2025	341,411	132.54%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	2,055	191.88%	$0.00
OBERWEIS ASSET MANAGEMENT INC/	31 Dec, 2025	170,200	25.57%	$0.00
Allspring Global Investments Holdings, LLC	31 Dec, 2025	5,107	2.56%	$0.00
Goldman Sachs Group Inc	31 Dec, 2025	-391,820	-33.37%	$0.00
Baird Financial Group, Inc.	31 Dec, 2025	54,109	66.97%	$0.00
EMERALD ADVISERS, LLC	31 Dec, 2025	236,385	45.36%	$0.00
Y-Intercept (Hong Kong) Ltd	31 Dec, 2025	120,251	0.00%	$0.00
AWM Investment Company, Inc.	31 Dec, 2025	8,750	1.17%	$0.00

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