American Superconductor Corp /De/ (AMSC) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

44,534,130Shares Outstanding

323,334Shares held by institutions

$11,853,424Value of institutional holdings

72.65%Institutional ownership %

13.02%Shares Changed QoQ

227No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

A total of 227 institutions have reported a stake in American Superconductor Corp /De/ (NASDAQ:AMSC) as of December 2025, according to recent 13F filings with the SEC.

The percentage of American Superconductor owned by institutions changed from 76.1% in September 2025 to 72.7% in December 2025, marking a slight down trend.
The company experienced a 13.02% quarterly change in institutional shares held, alongside an increase of 18.85% in total owners annually.
Among the 227 institutional holders of American Superconductor, 141 added to their stakes while 58 trimmed their positions and 28 held steady.
The aggregate institutional position in American Superconductor now stands at 32.36Mn shares as of December 2025, after investors increased their holdings (up by 3.73Mn shares quarter on quarter which is up 4.44Mn shares year over year).
BlackRock, Inc. continues to be the largest institutional holder of American Superconductor as of December 31, 2025, with a position of 3.75Mn shares, representing 8.42% of the company's outstanding stock.
Among the most significant buyers of American Superconductor during 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).
Leading sellers of American Superconductor stock in December 2025 included DRIEHAUS CAPITAL MANAGEMENT LLC (718.96K), GOLDMAN SACHS GROUP INC (391.82K), D. E. Shaw & Co., Inc. (309.56K), RENAISSANCE TECHNOLOGIES LLC (184.00K), VOLORIDGE INVESTMENT MANAGEMENT, LLC (144.91K).
The top 10 institutional holders of American Superconductor for the quarter ending December 2025 included 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/ (835.90K), GOLDMAN SACHS GROUP INC (782.29K), EMERALD ADVISERS, LLC (757.57K).

227 Institutional Holders

323,334 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	3,750,403	121,107	3.34%	$107,936,611.00
VANGUARD GROUP INC	31 Dec, 2025	3,526,632	576,831	19.55%	$101,496,470.00
BAILLIE GIFFORD & CO	31 Dec, 2025	1,506,841	79,509	5.57%	$43,366,884.00
STATE STREET CORP	31 Dec, 2025	1,192,093	56,215	4.95%	$34,308,437.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,090,710	20,855	1.95%	$31,396,276.00
Atreides Management, LP	31 Dec, 2025	1,044,193	272,698	35.35%	$30,051,875.00
Nuveen, LLC	31 Dec, 2025	960,968	134,816	16.32%	$27,656,659.00
OBERWEIS ASSET MANAGEMENT INC/	31 Dec, 2025	835,900	170,200	25.57%	$24,057,202.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	782,287	-391,820	-33.37%	$22,514,220.00
EMERALD ADVISERS, LLC	31 Dec, 2025	757,568	236,385	45.36%	$21,802,807.00
AWM Investment Company, Inc.	31 Dec, 2025	754,220	8,750	1.17%	$21,706,452.00
UBS Group AG	31 Dec, 2025	744,563	550,829	284.32%	$21,428,523.00
MORGAN STANLEY	31 Dec, 2025	705,442	369,677	110.10%	$20,302,656.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	683,202	-77,255	-10.16%	$19,662,554.00
FIRST TRUST ADVISORS LP	31 Dec, 2025	682,967	224,576	48.99%	$19,655,790.00
Telemark Asset Management, LLC	31 Dec, 2025	619,900	-70,100	-10.16%	$17,840,722.00
Qube Research & Technologies Ltd	31 Dec, 2025	599,006	341,411	132.54%	$17,239,393.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	540,253	68,769	14.59%	$15,549,050.00
DRIEHAUS CAPITAL MANAGEMENT LLC	31 Dec, 2025	499,984	-718,960	-58.98%	$14,389,540.00
ALGERT GLOBAL LLC	31 Dec, 2025	460,771	172,891	60.06%	$13,261.00

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