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Disclosery

AMSC AMERICAN SUPERCONDUCTOR CORP

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SHS NEW (common), issuer CIK 880807

266 managers (273 13F filers) reported a position in AMSC shares at 2025-09-30, 32,700,593 shares in all. 70 filers opened a position and 29 filers sold out during the quarter.

Managers
266
13F filers
273
New
70
Added
93
Reduced
81
Sold out
29
Shares held by filers
32,700,593

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,652$217K0.01%-24813F-HRTimelineGroup
SBI Securities Co., Ltd.3,408$202K0.01%-45913F-HRTimeline
HARTLINE INVESTMENT CORP/3,400$202K0.02%new13F-HRTimeline
XPONANCE LLC3,379$201K<0.01%new13F-HRTimeline
Global Retirement Partners, LLC3,212$191K<0.01%+79613F-HRTimeline
Steward Partners Investment Advisory, L…2,625$156K<0.01%013F-HRTimeline
STANCE CAPITAL LLC2,606$155K0.06%new13F-HRTimeline
State of Alaska, Department of Revenue2,099$124K<0.01%new13F-HRTimeline
MARK SHEPTOFF FINANCIAL PLANNING, LLC2,000$119K0.06%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,622$96.3K<0.01%-4,14013F-HRTimelineGroup
KBC Group NVin group KBC Group NV1,613$96K<0.01%new13F-HRTimelineGroup
ONCE CAPITAL MANAGEMENT, LLC1,600$95K0.03%new13F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC1,595$94K<0.01%new13F-HRTimelineGroup
Banque Cantonale Vaudoisein group Banque Cantonale Vaudoise1,585$94K<0.01%013F-HRTimelineGroup
SIMPLEX TRADING, LLC1,363$80K<0.01%-7,83413F-HRTimeline
Essential Partners LLC1,292$76.7K0.03%+14013F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD1,200$71.3K<0.01%-80013F-HRTimeline
AMALGAMATED BANK1,185$70K<0.01%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…1,071$63.6K<0.01%new13F-HRTimelineGroup
GAMMA Investing LLC982$58.3K<0.01%+2813F-HRTimeline
SIGNATUREFD, LLC913$54.2K<0.01%013F-HRTimeline
Point72 (DIFC) Ltd791$47K<0.01%-32413F-HRTimeline
Allworth Financial LP735$43.6K<0.01%+5013F-HRTimeline
Federation des caisses Desjardins du Qu…700$41.6K<0.01%+38713F-HRTimeline
Versant Capital Management, Inc628$37.3K0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC529$31.4K<0.01%013F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …455$27K<0.01%+6013F-HRTimelineGroup
SWAN Capital LLC400$23.8K0.01%new13F-HRTimeline
MONTAG A & ASSOCIATES INC393$23.3K<0.01%new13F-HRTimeline
Clearstead Trust, LLC393$23.3K<0.01%013F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources266$19.5K<0.01%-50,24913F-HRTimelineGroup
Bullock Wealth Management Group307$18.2K0.01%new13F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management217$12.9K<0.01%+15313F-HRTimelineGroup
Sunbelt Securities, Inc.205$12.2K<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…197$11.7K<0.01%+1213F-HRTimelineGroup
WPG Advisers, LLC168$9.98K0.01%new13F-HRTimeline
MCF Advisors LLC164$9.74K<0.01%new13F-HRTimeline
Hillsdale Investment Management Inc.150$8.91K<0.01%-219,85013F-HRTimeline
Parallel Advisors, LLC146$8.67K<0.01%+1113F-HRTimeline
Wealthspire Advisors, LLC114$6.77K<0.01%new13F-HRTimeline
Sterling Capital Management LLC106$6.29K<0.01%+1413F-HRTimeline
TRUST CO OF VERMONT100$5.94K<0.01%013F-HRTimeline
Archer Investment Corp100$5.94K<0.01%013F-HRTimeline
TD Waterhouse Canada Inc.100$5.93K<0.01%new13F-HRTimeline
PRIVATE TRUST CO NA75$4.45K<0.01%-2513F-HRTimeline
ORG Partners LLC70$4.16K<0.01%new13F-HRTimeline
ROTHSCHILD INVESTMENT LLC65$3.86K<0.01%-1013F-HRTimeline
Quarry LP61$3.62K<0.01%-1,07013F-HRTimeline
HAGER INVESTMENT MANAGEMENT SERVICES, L…50$2.97K<0.01%013F-HRTimeline
WHITTIER TRUST CO OF NEVADA INC40$2.37K<0.01%013F-HRTimeline
Clearstead Advisors, LLC35$2.08K<0.01%new13F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.34$2.02K<0.01%013F-HRTimelineGroup
Fortitude Family Office, LLC33$1.96K<0.01%013F-HRTimeline
IFP Advisors, Inc24$1.43K<0.01%+913F-HR/ATimeline
Rise Advisors, LLC24$1.43K<0.01%013F-HRTimeline
Larson Financial Group LLC18$1.07K<0.01%-15113F-HRTimeline
Smartleaf Asset Management LLC16$973<0.01%new13F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/10$594<0.01%-1013F-HRTimelineGroup
JFS WEALTH ADVISORS, LLC10$594<0.01%013F-HRTimeline
True Wealth Design, LLC7$416<0.01%013F-HRTimeline
Farther Finance Advisors, LLC5$297<0.01%-52513F-HRTimeline
MassMutual Private Wealth & Trust, FSB3$178<0.01%new13F-HRTimeline
Tortoise Investment Management, LLC2$119<0.01%new13F-HRTimeline
AlphaQuest LLC2$119<0.01%new13F-HRTimeline
Turning Point Benefit Group, Inc.2$118<0.01%new13F-HRTimeline
Covestor Ltd4$00%013F-HRTimelineValue filed as zero, left out of ratios.