American Superconductor Corporation (AMSC)

NMS – Real Time Price. Currency in USD

54.51

-4.21 (-7.17%)

At close: May 12, 2026, 4:00 PM EDT

54.05

-0.46 (-0.84%)

After-hours: May 12, 2026, 7:56 PM EDT

Ownership

Breakdown
3.68%	% of Shares Held by All Insider
75.12%	% of Shares Held by Institutions
77.99%	% of Float Held by Institutions
340	Number of Institutions Holding Shares

Holder	Shares	Date Reported	% Out	Value
Vanguard Capital Management LLC	2.04M	2026-03-31	4.28%	$121.57M
Vanguard Portfolio Management LLC	1.71M	2026-03-31	3.60%	$102.03M
BAILLIE GIFFORD & CO	1.45M	2026-03-31	3.04%	$86.28M
Nuveen, LLC	1.02M	2026-03-31	2.14%	$60.86M
Emerald Advisers, LLC	757,404	2026-03-31	1.59%	$41.80M

Holder	Shares	Date Reported	% Out	Value
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund	1.37M	2025-12-31	2.87%	$81.38M
iShares Trust-iShares Russell 2000 ETF	1.12M	2026-03-31	2.35%	$66.56M
OBERWEIS FUNDS-Oberweis Micro-Cap Fund	785,200	2025-12-31	1.65%	$46.81M
VANGUARD INDEX FUNDS-Vanguard Extended Market Index Fund	486,093	2025-12-31	1.02%	$28.98M
First TRT Exch-Trd Fd. II-First TRT NASDAQ Clean Edge Smart Grid Infra	472,406	2026-04-30	0.99%	$28.16M
Fidelity Salem Street Trust-Fidelity Small Cap Index Fund	428,414	2026-02-28	0.90%	$25.54M
Vanguard Explorer Fund	424,487	2026-01-31	0.89%	$25.30M
College Retirement Equities Fd.-College Retirement Equities Fd. - Tota	385,097	2025-12-31	0.81%	$22.96M
iShares Trust-iShares Russell 2000 Growth ETF	376,506	2026-03-31	0.79%	$22.44M
Invesco Exchange-Traded Fund Trust-Invesco WilderHill Clean Energy ETF	346,589	2026-01-31	0.73%	$12.53M
TIAA-CREF Funds-Nuveen Quant Small Cap Equity Fund	340,280	2026-01-31	0.71%	$20.28M
IVY FUNDS-Nomura Small Cap Growth Fund	306,390	2025-12-31	0.64%	$10.03M