American Superconductor Corporation AMSC

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27.68 USD +1.33 (+5.05%)

At closeNov 3, 2026, 7:53 PM EST

27.78 +0.10 +0.35%

After hours · Nov 3, 7:53 PM ET

27.14 Day range 27.79

24.08 52-week range 60.65

Held by insiders 3.45%

Held by institutions 75.24%

Float held by institutions 77.92%

Institutions 377

Top institutional holders
Holder	% held	Shares	Value	Reported
Blackrock Inc.	8.45%	4,095,371	113.36M	Jun 29, 2026
Vanguard Capital Management LLC	4.20%	2,034,219	56.31M	Jun 29, 2026
Barrow, Hanley Mewhinney & Strauss, LLC	3.52%	1,704,006	47.17M	Jun 29, 2026
UBS Group AG	2.95%	1,429,090	39.56M	Jun 29, 2026
Vanguard Portfolio Management LLC	2.93%	1,418,863	39.27M	Jun 29, 2026
State Street Corporation	2.80%	1,358,225	37.60M	Jun 29, 2026

Top mutual fund holders
Holder	% held	Shares	Value	Reported
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund	2.97%	1,441,062	39.89M	Jun 29, 2026
iShares Trust-iShares Russell 2000 ETF	2.54%	1,228,883	34.02M	Sep 29, 2026
OBERWEIS FUNDS-Oberweis Micro-Cap Fund	1.91%	925,300	25.61M	Jun 29, 2026
First TRT Exch-Trd Fd. II-First TRT NASDAQ Clean Edge Smart Grid Infra	1.37%	662,230	18.33M	Sep 29, 2026
VANGUARD INDEX FUNDS-Vanguard Extended Market Index Fund	1.13%	546,978	15.14M	Jun 29, 2026
Fidelity Salem Street Trust-Fidelity Small Cap Index Fund	1.08%	523,874	14.50M	Aug 30, 2026

AMSC insiders
Insider	Relation	Latest transaction	Date	Shares held
DAMBIER LAURA A.	Director	Sale	Jun 10, 2026	14,992
DONNELLY TERENCE ROBERT	Director	Stock Award(Grant)	Apr 1, 2026	2,665
HOUSE ARTHUR H	Director	Stock Award(Grant)	Apr 1, 2026	51,779
KLEIN MARGARET D.	Director	Stock Award(Grant)	Apr 1, 2026	19,492
KOSIBA JOHN W. JR.	Chief Financial Officer	Sale	Jun 10, 2026	334,748
LITTLEFIELD BARBARA G.	Director	Stock Award(Grant)	Sep 17, 2026	37,034

Held by funds