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Disclosery

AMSC AMERICAN SUPERCONDUCTOR CORP

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SHS NEW (common), issuer CIK 880807

187 managers (190 13F filers) reported a position in AMSC shares at 2025-03-31, 27,547,812 shares in all. 38 filers opened a position and 38 filers sold out during the quarter.

Managers
187
13F filers
190
New
38
Added
62
Reduced
64
Sold out
38
Shares held by filers
27,547,812

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, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, 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
BlackRock, Inc.in group BlackRock, Inc.3,258,423$59.1M<0.01%-169,47013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC2,287,585$41.5M<0.01%+64,65013F-HRTimelineGroup
AWM Investment Company, Inc.1,558,478$28.3M3.89%+45,00013F-HRTimeline
BAILLIE GIFFORD & COin group BAILLIE GIFFORD & CO1,518,890$27.6M0.02%-130,90013F-HRTimelineGroup
Hood River Capital Management LLC1,239,096$22.5M0.38%+2,95013F-HRTimeline
MACQUARIE GROUP LTDin group MACQUARIE GROUP LTD1,026,822$18.6M0.02%-13,35713F-HR/ATimelineGroup
STATE STREET CORPin group STATE STREET CORP890,047$16.1M<0.01%-19,24813F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC881,681$16M<0.01%+25,22613F-HRTimelineGroup
ROYCE & ASSOCIATES LP867,342$15.7M0.17%+28,41013F-HRTimeline
Driehaus Capital Management LLC839,843$15.2M0.15%-102,85513F-HRTimeline
Atreides Management, LP824,040$14.9M0.54%new13F-HRTimeline
Nuveen, LLCin group TIAA778,566$14.1M<0.01%13F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP668,152$12.1M<0.01%+13,85313F-HRTimelineGroup
OBERWEIS ASSET MANAGEMENT INC/668,200$12.1M0.6%+3,80013F-HRTimeline
Telemark Asset Management, LLC600,000$10.9M1.42%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY509,897$9.25M<0.01%+71,72613F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC481,961$8.74M<0.01%+170,24313F-HR/ATimelineGroup
Qube Research & Technologies Ltd409,407$7.43M0.01%+225,43313F-HRTimeline
ESSEX INVESTMENT MANAGEMENT CO LLC372,221$6.75M1.41%-57,65513F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc364,530$6.61M<0.01%+16,98113F-HRTimelineGroup
Allspring Global Investments Holdings, …in group Allspring Global Investments …341,030$6.27M0.01%-36,34513F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP330,552$6M0.01%-4,50113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP330,513$6M<0.01%+2,70813F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co309,681$5.62M<0.01%-8,18813F-HR/ATimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…289,173$5.25M<0.01%-172,05713F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding246,774$4.48M-252,377Timeline
Invesco Ltd.in group Invesco Ltd.243,523$4.42M<0.01%+45,74013F-HRTimelineGroup
Trexquant Investment LP242,369$4.4M0.05%new13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC225,682$4.09M<0.01%+202,61713F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC211,164$3.83M<0.01%-45,06613F-HRTimelineGroup
Hillsdale Investment Management Inc.190,400$3.45M0.18%+6,60013F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC157,889$2.86M<0.01%-255,75713F-HRTimelineGroup
CAPITAL FUND MANAGEMENT S.A.147,473$2.68M0.03%+98,85113F-HRTimeline
PANAGORA ASSET MANAGEMENT INC145,314$2.64M0.01%+71,70113F-HRTimeline
Palisades Investment Partners, LLC144,604$2.62M1.32%+2,18913F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC131,561$2.39M<0.01%-128,27813F-HRTimelineGroup
ArrowMark Colorado Holdings LLC130,432$2.37M0.04%-16,00013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC121,539$2.2M<0.01%+92,19713F-HR/ATimelineGroup
TWINBEECH CAPITAL LP115,458$2.09M0.04%new13F-HRTimeline
Cubist Systematic Strategies, LLC109,285$1.98M0.03%new13F-HRTimeline
Connor, Clark & Lunn Investment Managem…108,571$1.97M0.01%-168,67913F-HRTimeline
GMT Capital Corp108,066$1.96M0.1%013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp107,946$1.96M<0.01%-66313F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.107,406$1.95M<0.01%+93,24113F-HRTimelineGroup
ALGERT GLOBAL LLC95,658$1.74M0.04%+33,10013F-HR/ATimeline
Baird Financial Group, Inc.in group Baird Financial Group, Inc.85,766$1.56M<0.01%+17,82113F-HRTimelineGroup
RICE HALL JAMES & ASSOCIATES, LLC82,749$1.5M0.09%-38113F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.74,991$1.36M<0.01%-177,21813F-HRTimelineGroup
Andrew Hill Investment Advisors, Inc.72,891$1.32M1.28%-42,08013F-HRTimeline
Swiss National Bank72,600$1.32M<0.01%-2,70013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC68,268$1.24M<0.01%-1,01313F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND66,536$1.21M<0.01%013F-HR/ATimeline
DARK FOREST CAPITAL MANAGEMENT LP66,523$1.21M0.06%new13F-HRTimeline
CAMPBELL NEWMAN ASSET MANAGEMENT INC60,626$1.1M0.09%+42113F-HRTimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC59,464$1.08M0.01%+1,16013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO58,447$1.06M<0.01%+8,43513F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/52,934$960K<0.01%+37,61913F-HRTimelineGroup
Merit Financial Group, LLC51,751$939K0.01%-19113F-HRTimeline
EMERALD ADVISERS, LLCgroup of 2 filers holding51,316$931K+14,920Timeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…50,827$922K<0.01%+3,32613F-HRTimelineGroup
RHUMBLINE ADVISERS49,173$892K<0.01%-1,94613F-HR/ATimeline
BARCLAYS PLCin group BARCLAYS PLC47,993$871K<0.01%-17,91013F-HR/ATimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN46,942$852K<0.01%+12,67513F-HRTimelineGroup
Amundiin group Amundi49,764$830K<0.01%-3,14713F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC45,478$825K<0.01%new13F-HR/ATimelineGroup
Dorsey & Whitney Trust CO LLC45,300$822K0.05%013F-HRTimeline
Range Financial Group LLC44,925$815K0.36%+2,90713F-HRTimeline
Legato Capital Management LLC44,363$805K0.11%-9,91313F-HRTimeline
Verition Fund Management LLC44,304$804K<0.01%new13F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources44,102$800K<0.01%+11,28713F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP43,357$786K<0.01%+25,13513F-HRTimelineGroup
BANTAMAC CAPITAL, LLC42,510$771K0.37%-11,72913F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.42,441$770K<0.01%new13F-HR/ATimelineGroup
Inspire Investing, LLCin group Inspire Investing, LLC38,556$699K0.08%new13F-HRTimelineGroup
Cambridge Investment Research Advisors,…37,723$684K<0.01%+4,25913F-HRTimeline
ExodusPoint Capital Management, LP36,265$658K0.01%new13F-HRTimeline
ALLIANCEBERNSTEIN L.P.35,720$648K<0.01%013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…35,559$645K<0.01%013F-HRTimeline
LPL Financial LLC33,775$613K<0.01%-24,75913F-HRTimeline
GSA CAPITAL PARTNERS LLP31,006$562K0.05%-3,65513F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO29,856$542K<0.01%-22,25013F-HR/ATimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\29,835$541K<0.01%-3,07813F-HRTimelineGroup
HRT FINANCIAL LP29,678$538K<0.01%-9,59613F-HRTimeline
Engineers Gate Manager LP29,137$529K0.01%new13F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.28,719$521K0.08%new13F-HRTimeline
Quantum Private Wealth, LLC27,423$497K0.19%+16,00013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC27,200$493K<0.01%-3,71913F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA26,190$475K<0.01%+5,64713F-HR/ATimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…25,295$459K<0.01%+2,98913F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC25,430$458K<0.01%+8,05113F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC24,630$447K<0.01%-13,74213F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/24,277$441K<0.01%+1,67713F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management22,205$403K<0.01%-216,78713F-HRTimelineGroup
Kestra Advisory Services, LLCgroup of 2 filers holding21,134$383K+10,413Timeline
HUSSMAN STRATEGIC ADVISORS, INC.21,000$381K0.09%-42,00013F-HRTimeline
STRS OHIO20,900$379K<0.01%013F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…20,808$377K<0.01%-39313F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…20,649$375K<0.01%new13F-HRTimeline
TUDOR INVESTMENT CORP ET AL20,114$365K<0.01%new13F-HRTimeline
KENNEDY CAPITAL MANAGEMENT LLC19,204$348K0.01%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC19,199$348K<0.01%+8,59413F-HR/ATimelineGroup
GoalVest Advisory LLC18,900$343K0.09%-1,10013F-HRTimeline
PFG Investments, LLC18,900$343K0.02%+7,55013F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC18,849$342K<0.01%+4,44113F-HRTimeline
NewEdge Advisors, LLC18,833$342K<0.01%-8,04113F-HRTimeline
Integrated Quantitative Investments LLC18,100$328K0.16%new13F-HRTimeline
JOURNEY STRATEGIC WEALTH LLC17,542$318K0.01%new13F-HRTimeline
Corebridge Financial, Inc.in group Corebridge Financial, Inc.17,123$311K<0.01%-25513F-HRTimelineGroup
TFC Financial Management, Inc.16,731$304K0.05%+26013F-HRTimeline
Sowell Financial Services LLC16,459$299K0.01%+1,38413F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson15,800$297K<0.01%013F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd16,269$295K0.02%new13F-HRTimelineGroup
SG Americas Securities, LLC15,839$287K<0.01%+8,10513F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…14,916$271K<0.01%+2,71913F-HRTimeline
Advisory Services Network, LLC14,017$254K<0.01%-2,54313F-HRTimeline
SIMPLEX TRADING, LLC13,508$245K0.01%-7,70413F-HRTimeline
Massar Capital Management, LP13,397$243K0.29%new13F-HRTimeline
Capital Market Strategies LLC13,188$239K0.16%new13F-HRTimeline
IEQ CAPITAL, LLC13,006$236K<0.01%-9,82913F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …12,446$226K<0.01%-16113F-HRTimelineGroup
Man Group plcin group Man Group plc12,418$225K<0.01%+36713F-HRTimelineGroup
WOLVERINE TRADING, LLC11,748$221K0.01%-6,12613F-HRTimeline
ACAS, LLC10,165$206K0.16%new13F-HRTimeline
Truvestments Capital LLC11,176$203K0.04%new13F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM10,733$195K<0.01%-35913F-HRTimeline
TWO SIGMA SECURITIES, LLC10,500$190K0.03%new13F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP10,235$186K<0.01%+3513F-HRTimelineGroup
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …10,000$181K<0.01%-2,50013F-HRTimelineGroup
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/9,506$172K<0.01%+2,07213F-HRTimelineGroup
GPS Wealth Strategies Group, LLC9,452$171K0.02%013F-HRTimeline
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…9,294$169K<0.01%-21013F-HRTimelineGroup
Police & Firemen's Retirement System of…7,950$144K<0.01%013F-HRTimeline
CWM, LLCin group CWM, LLC7,915$144K<0.01%+2,62213F-HRTimelineGroup
KLP KAPITALFORVALTNING AS6,900$125K<0.01%013F-HRTimeline
Point72 (DIFC) Ltd5,998$109K0.01%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS5,830$106K<0.01%-6,50913F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP4,701$88.3K<0.01%+1,74313F-HR/ATimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,345$60.7K<0.01%013F-HRTimelineGroup
FMR LLCin group FMR LLC2,793$50.7K<0.01%+57713F-HRTimelineGroup
SBI Securities Co., Ltd.2,340$42.4K<0.01%-30513F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,425$25.8K<0.01%-2,61413F-HRTimelineGroup
SUMMIT SECURITIES GROUP LLC1,280$23.2K0.02%new13F-HRTimeline
AMALGAMATED BANK1,185$21K<0.01%+413F-HRTimeline
Quarry LP1,066$19.3K<0.01%+26913F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD1,000$18.1K<0.01%-1,00013F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.1,088$17.4K<0.01%013F-HRTimelineGroup
SouthState Bank Corpin group SouthState Bank Corp765$13.9K<0.01%new13F-HRTimelineGroup
SIGNATUREFD, LLC750$13.6K<0.01%+50013F-HRTimeline
PRINCIPAL SECURITIES, INC.in group PRINCIPAL FINANCIAL GROUP INC525$12.9K<0.01%013F-HRTimelineGroup
Allworth Financial LP639$12.9K<0.01%-1513F-HRTimeline
LORING WOLCOTT & COOLIDGE FIDUCIARY ADV…633$11.8K<0.01%new13F-HRTimeline
Versant Capital Management, Inc609$11K<0.01%new13F-HRTimeline
NISA INVESTMENT ADVISORS, LLC540$9.8K<0.01%-14313F-HRTimeline
Park Square Financial Group, LLC493$8.94K0.01%013F-HRTimeline
GAMMA Investing LLC466$8.45K<0.01%+20113F-HR/ATimeline
Clearstead Trust, LLC393$7.13K<0.01%013F-HRTimeline
Stonebridge Financial Group, LLC319$5.79K<0.01%new13F-HRTimeline
Federation des caisses Desjardins du Qu…313$5.68K<0.01%013F-HRTimeline
Parallel Advisors, LLC284$5.15K<0.01%+12313F-HRTimeline
Capital Advisors, Ltd. LLC292$5K<0.01%013F-HRTimeline
COMERICA BANK255$4.63K<0.01%+3313F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\180$3.27K<0.01%+5613F-HRTimelineGroup
Larson Financial Group LLC177$3.21K<0.01%new13F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…159$2.88K<0.01%-713F-HRTimelineGroup
SVB WEALTH LLC158$2.87K<0.01%new13F-HRTimeline
AlphaQuest LLC106$1.92K<0.01%-23913F-HRTimeline
PRIVATE TRUST CO NA100$1.81K<0.01%013F-HRTimeline
Archer Investment Corp100$1.81K<0.01%-30013F-HRTimeline
ROTHSCHILD INVESTMENT LLC75$1.36K<0.01%+3513F-HRTimeline
CoreCap Advisors, LLC65$1.18K<0.01%new13F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management64$1.16K<0.01%-17,45313F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…51$925<0.01%-7913F-HRTimelineGroup
HAGER INVESTMENT MANAGEMENT SERVICES, L…50$907<0.01%013F-HRTimeline
Parkside Financial Bank & Trust40$726<0.01%new13F-HRTimeline
WHITTIER TRUST CO OF NEVADA INC40$725<0.01%013F-HRTimeline
Sterling Capital Management LLC35$635<0.01%013F-HRTimeline
Lindbrook Capital, LLC35$635<0.01%+2113F-HRTimeline
Farther Finance Advisors, LLC30$552<0.01%013F-HRTimeline
Hexagon Capital Partners LLC30$544<0.01%new13F-HRTimeline
Rialto Wealth Management, LLC25$454<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…24$435<0.01%-2,95813F-HRTimelineGroup
Stephens Consulting, LLC20$363<0.01%new13F-HRTimeline
JFS WEALTH ADVISORS, LLC10$182<0.01%013F-HRTimeline
WealthTrak Capital Management LLC10$182<0.01%new13F-HRTimeline
IFP Advisors, Inc10$181<0.01%-1113F-HRTimeline
Covestor Ltd4$00%013F-HRTimelineValue filed as zero, left out of ratios.
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0-2,03813F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.