American Superconductor Corporation AMSC

Set alert

26.26 USD -1.42 (-5.13%)

At closeNov 5, 2026, 4:47 AM EST

26.00 -0.26 -0.99%

Pre-market · Nov 5, 4:47 AM ET

25.59 Day range 27.63

24.08 52-week range 60.65

Held by insiders 3.45%

Held by institutions 75.28%

Float held by institutions 77.97%

Institutions 378

Top institutional holders
Holder	% held	Shares	Value	Reported
Blackrock Inc.	8.45%	4,095,371	107.54M	Jun 29, 2026
Vanguard Capital Management LLC	4.20%	2,034,219	53.42M	Jun 29, 2026
Barrow, Hanley Mewhinney & Strauss, LLC	3.52%	1,704,006	44.75M	Jun 29, 2026
UBS Group AG	2.95%	1,429,090	37.53M	Jun 29, 2026
Vanguard Portfolio Management LLC	2.93%	1,418,863	37.26M	Jun 29, 2026
State Street Corporation	2.80%	1,358,225	35.67M	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	37.84M	Jun 29, 2026
iShares Trust-iShares Russell 2000 ETF	2.54%	1,228,883	32.27M	Sep 29, 2026
OBERWEIS FUNDS-Oberweis Micro-Cap Fund	1.91%	925,300	24.30M	Jun 29, 2026
First TRT Exch-Trd Fd. II-First TRT NASDAQ Clean Edge Smart Grid Infra	1.37%	662,230	17.39M	Sep 29, 2026
VANGUARD INDEX FUNDS-Vanguard Extended Market Index Fund	1.13%	546,978	14.36M	Jun 29, 2026
Fidelity Salem Street Trust-Fidelity Small Cap Index Fund	1.08%	523,874	13.76M	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