American Superconductor AMSC Institutional Ownership

NASDAQ AMSC

$25.40 +0.28 (+1.11%)

At close: Oct 26, 2026 · 4:00 PM EDT

Institutions by Trading Activity

277 Institutions

Increased 173 62.5%

Unchanged 27 9.7%

Reduced 77 27.8%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

73.73%

▲+3.26 pp QoQ

Shares Held by Institutions

35.72Mn

of 48.45Mn outstanding

▲+6.42% QoQ

Shares Outstanding

48.45Mn

12.73Mn held outside 13F filers

Institutional Investors

277

filed 13F for Jun 2026

▲+32 vs prior quarter

Net Shares Added (QoQ)

+2.15Mn

accumulated since last quarter

Value of Holdings

$897.31Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 16, 2026

American Superconductor Corp (NASDAQ:AMSC) was held by 277 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

Their combined stake equaled 73.73% of outstanding shares in Q2 2026, up from 70.47% in Q1 2026.
Total holdings of American Superconductor shares rose 6.42% from Q1 2026, and the number of holders rose 21.49% from Q2 2025.
Looking at the 277 holders of AMSC individually, 173 added to their positions, 77 reduced their stakes and 27 left their positions unchanged.
Altogether, institutional holders owned 35.72Mn AMSC shares at the end of Q2 2026, up 2.15Mn from the prior quarter and up 4.38Mn from a year earlier.
As of June 30, 2026, BlackRock, Inc. held the largest stake in American Superconductor with 4.1Mn shares, or 8.45% of shares outstanding.
Among existing holders, the largest additions to American Superconductor in Q2 2026 came from UBS Group AG (+829.27K shares), Goldman Sachs Group Inc (+584.54K shares), Barrow Hanley Mewhinney & Strauss LLC (+564.21K shares), First Trust Advisors LP (+390.16K shares) and T. Rowe Price Associates Inc (+285.25K shares).
Among holders that kept a stake in American Superconductor, the biggest sellers in Q2 2026 were Baillie Gifford & Co (-514.11K shares), Nuveen, LLC (-392.54K shares), Vanguard Portfolio Management LLC (-292.81K shares), Portolan Capital Management, LLC (-266.32K shares) and Arrowstreet Capital, Limited Partnership (-215.85K shares).
Per Business Quant data, the 10 largest holders of American Superconductor at the end of Q2 2026 were BlackRock, Inc. (4.1Mn shares), Vanguard Capital Management LLC (2.03Mn shares), Barrow Hanley Mewhinney & Strauss LLC (1.7Mn shares), UBS Group AG (1.43Mn shares), Vanguard Portfolio Management LLC (1.42Mn shares), State Street Corp (1.36Mn shares), Goldman Sachs Group Inc (1.29Mn shares), Geode Capital Management, LLC (1.24Mn shares), First Trust Advisors LP (1.17Mn shares) and Oberweis Asset Management Inc (987.5K shares).

Form 13F Holdings

277 Institutional Holders

Report period 30 Jun, 2026

Total shares held 35.72Mn

Of outstanding 73.73%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	4,095,371	8.45%	▲112,721	+2.83%	$170.00Mn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,034,219	4.20%	▼5,249	-0.26%	$84.44Mn
3	BARROW HANLEY MEWHINNEY & STRAUSS LLC	0000313028	1,704,006	3.52%	▲564,213	+49.50%	$70.73Mn
4	UBS Group AG	0001610520	1,429,090	2.95%	▲829,269	+138.25%	$59.32Mn
5	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,418,863	2.93%	▼292,814	-17.11%	$58.90Mn
6	State Street Corp	0000093751	1,358,225	2.80%	▲97,154	+7.70%	$56.38Mn
7	Goldman Sachs Group Inc	0000886982	1,294,047	2.67%	▲584,543	+82.39%	$53.72Mn
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,243,198	2.57%	▲74,046	+6.33%	$51.62Mn
9	FIRST TRUST ADVISORS LP	0001125816	1,168,424	2.41%	▲390,156	+50.13%	$48.50Mn
10	OBERWEIS ASSET MANAGEMENT INC/	0000937886	987,500	2.04%	▲137,600	+16.19%	$40.99Mn
11	AWM Investment Company, Inc.	0001535264	951,604	1.96%	▲150,000	+18.71%	$39.50Mn
12	BAILLIE GIFFORD & CO	0001088875	933,308	1.93%	▼514,111	-35.52%	$38.74Mn
13	EMERALD ADVISERS, LLC	0001015083	843,956	1.74%	▲86,552	+11.43%	$35.03Mn
14	Legal & General Group Plc	0000764068	756,863	1.56%	▲226,732	+42.77%	$31.42Mn
15	DIMENSIONAL FUND ADVISORS LP	0000354204	645,991	1.33%	▼12,306	-1.87%	$26.81Mn
16	Morgan Stanley	0000895421	635,833	1.31%	▲1,992	+0.31%	$26.39Mn
17	Nuveen, LLC	0001871926	628,406	1.30%	▼392,541	-38.45%	$26.09Mn
18	Telemark Asset Management, LLC	0001420816	600,000	1.24%	0	0.00%	$24.91Mn
19	ROYCE & ASSOCIATES LP	0000906304	555,821	1.15%	▲13,043	+2.40%	$23.07Mn
20	EMERALD MUTUAL FUND ADVISERS TRUST	0001352895	538,955	1.11%	▲100,080	+22.80%	$22.37Mn

Showing 1 to 20 of 277 holders