EMERALD ADVISERS, LLC

Position in AMSC — American Superconductor Corp /De/

CIK 1015083 LEOLA, PA

Position in AMSC

as of Jun 30, 2026 · filed Aug 5, 2026 Compact

Position Value

$35,032,613

+$9,394,488 QoQ

Shares Held

843,956

+11.4% QoQ

Ownership

1.74%

of shares outstanding

% of Portfolio

0.82%

of 13F equity value

Holder Rank

#13

of 276 holders

Holding Since

Dec 2020

9 quarters on record

Voting authority Sole 77% Shared 0% None 23%

Industrials · as of Jun 30, 2026

EMERALD ADVISERS, LLC holds $64,092,034 across 4 Specialty Industrial Machinery names. AMSC ranks #1 (54.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AMSC	American Superconductor Corp /De/ This page	843,956	$35,032,613
2	MIR	Mirion Technologies, Inc.	1,364,780	$24,470,505
3	EROC	ERock, Inc.	280,734	$4,070,643
4	GNRC	Generac Holdings Inc.	1,770	$518,273

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$35,032,613	843,956	+11.4%	Shares	Sole	2026-08-05
2026-03-31	$25,638,125	757,404	-0.0%	Shares	Sole	2026-05-04
2025-12-31	$21,802,807	757,568	+45.4%	Shares	Sole	2026-02-09
2025-09-30	$30,953,058	521,183	+4.2%	Shares	Sole	2025-10-30
2025-06-30	$18,346,981	500,054	+1191.5%	Shares	Sole	2025-08-04
2025-03-31	$702,362	38,719	+37.7%	Shares	Sole	2025-05-01
2024-12-31	$692,570	28,119	+86.4%	Shares	Sole	2025-02-11
2021-03-31	$285,992	15,084	-41.9%	Shares	Sole	2021-04-29
2020-12-31	$607,702	25,948	—	Shares	Sole	2021-01-29
No filing history on record for this holder in this stock.