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Disclosery

AMSC AMERICAN SUPERCONDUCTOR CORP

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SHS NEW (common), issuer CIK 880807

189 managers (191 13F filers) reported a position in AMSC shares at 2024-12-31, 27,521,161 shares in all. 46 filers opened a position and 31 filers sold out during the quarter.

Managers
189
13F filers
191
New
46
Added
59
Reduced
51
Sold out
31
Shares held by filers
27,521,161

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, Q4 2024

Filers in the available 13F reports with a share position at 2024-12-31, 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.3,427,893$84.4M<0.01%+707,11013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC2,222,935$54.8M<0.01%-203,34313F-HRTimelineGroup
BAILLIE GIFFORD & COin group BAILLIE GIFFORD & CO1,649,790$40.6M0.03%-456,60513F-HRTimelineGroup
AWM Investment Company, Inc.1,513,478$37.3M4.54%-205,58913F-HRTimeline
Hood River Capital Management LLC1,236,146$30.4M0.45%-195,79413F-HRTimeline
MACQUARIE GROUP LTDin group MACQUARIE GROUP LTD1,040,179$25.6M0.03%+44,61313F-HRTimelineGroup
Driehaus Capital Management LLC942,698$23.2M0.19%+143,93613F-HRTimeline
STATE STREET CORPin group STATE STREET CORP909,295$22.4M<0.01%+3,04513F-HRTimelineGroup
Nuveen Asset Management, LLCin group TIAA878,624$21.6M0.01%-151,68613F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC856,455$21.1M<0.01%+9,04313F-HRTimelineGroup
ROYCE & ASSOCIATES LP838,932$20.7M0.19%-116,24213F-HRTimeline
OBERWEIS ASSET MANAGEMENT INC/664,400$16.4M0.77%013F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP654,299$16.1M<0.01%+46,35413F-HRTimelineGroup
Telemark Asset Management, LLC600,000$14.8M1.47%013F-HRTimeline
UBS Group AGgroup of 2 filers holding499,151$12.3M+377,992Timeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…461,230$11.4M<0.01%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY438,171$10.8M<0.01%+60,76613F-HR/ATimelineGroup
ESSEX INVESTMENT MANAGEMENT CO LLC429,876$10.6M1.9%-34,63013F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC413,646$10.2M<0.01%13F-HR/ATimelineGroup
Allspring Global Investments Holdings, …in group Allspring Global Investments …377,375$9.29M0.01%-56,77013F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc347,549$8.56M<0.01%+10,34213F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP335,053$8.25M0.01%+43,80813F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP327,805$8.07M<0.01%+26,81913F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co317,869$7.83M<0.01%+13,34113F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC311,718$7.68M<0.01%+70,59213F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …296,792$7.31M0.01%new13F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…277,250$6.83M0.03%-149,01113F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC259,839$6.4M0.01%-36,21813F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC256,230$6.31M0.01%+151,01513F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.252,209$6.21M0.01%-1,20413F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management238,992$5.89M0.01%new13F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.197,783$4.87M<0.01%-340,61613F-HRTimelineGroup
Qube Research & Technologies Ltd183,974$4.53M0.01%+53,84313F-HRTimeline
Hillsdale Investment Management Inc.183,800$4.53M0.23%+1,15013F-HRTimeline
ArrowMark Colorado Holdings LLC146,432$3.61M0.05%-59,00013F-HRTimeline
Palisades Investment Partners, LLC142,415$3.51M1.48%+12,31713F-HRTimeline
Andrew Hill Investment Advisors, Inc.114,971$2.83M2.1%-72,56913F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp108,609$2.68M<0.01%+8,73113F-HRTimelineGroup
GMT Capital Corp108,066$2.66M0.13%013F-HRTimeline
KBC Group NVin group KBC Group NV101,175$2.49M0.01%new13F-HRTimelineGroup
ARDSLEY ADVISORY PARTNERS LP100,000$2.46M0.48%013F-HRTimeline
KP Management LLC95,000$2.34M0.82%new13F-HRTimeline
RICE HALL JAMES & ASSOCIATES, LLC83,130$2.05M0.11%-64,06213F-HRTimeline
Swiss National Bank75,300$1.85M<0.01%+3,10013F-HRTimeline
PANAGORA ASSET MANAGEMENT INC73,613$1.81M0.01%+30,21213F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC69,281$1.71M<0.01%-9,21913F-HRTimelineGroup
Baird Financial Group, Inc.in group Baird Financial Group, Inc.67,945$1.67M<0.01%new13F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND66,536$1.64M<0.01%+2,43613F-HR/ATimeline
BARCLAYS PLCin group BARCLAYS PLC65,903$1.62M<0.01%+7,57513F-HR/ATimelineGroup
HUSSMAN STRATEGIC ADVISORS, INC.63,000$1.55M0.46%-42,00013F-HRTimeline
ALGERT GLOBAL LLC62,558$1.54M0.04%new13F-HR/ATimeline
CAMPBELL NEWMAN ASSET MANAGEMENT INC60,205$1.48M0.12%new13F-HRTimeline
LPL Financial LLC58,534$1.44M<0.01%+44,98513F-HRTimeline
Amundiin group Amundi52,911$1.44M<0.01%new13F-HRTimelineGroup
ALPS ADVISORS INCin group ALPS ADVISORS INC58,304$1.44M0.01%-20,27513F-HRTimelineGroup
Legato Capital Management LLC54,276$1.34M0.17%-57,67613F-HRTimeline
BANTAMAC CAPITAL, LLC54,239$1.34M0.6%+4,41513F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO52,106$1.28M<0.01%-10,89113F-HRTimelineGroup
Merit Financial Group, LLC51,942$1.28M0.02%-1,52613F-HRTimeline
RHUMBLINE ADVISERS51,119$1.26M<0.01%+60613F-HR/ATimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO50,012$1.23M<0.01%+3,29513F-HRTimelineGroup
CAPITAL FUND MANAGEMENT S.A.48,622$1.2M0.01%-29,02313F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…47,501$1.17M<0.01%new13F-HRTimelineGroup
NKCFO LLC47,000$1.16M0.51%new13F-HRTimeline
Caption Management, LLC45,900$1.13M0.05%new13F-HRTimeline
Dorsey & Whitney Trust CO LLC45,300$1.12M0.06%new13F-HRTimeline
Range Financial Group LLC42,018$1.03M0.48%new13F-HRTimeline
HRT FINANCIAL LP39,274$967K<0.01%new13F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC38,372$945K<0.01%+17,80313F-HRTimeline
EMERALD ADVISERS, LLCgroup of 2 filers holding36,396$896KnewTimeline
ALLIANCEBERNSTEIN L.P.35,720$880K<0.01%013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…35,559$876K<0.01%+70913F-HR/ATimeline
GSA CAPITAL PARTNERS LLP34,661$854K0.06%new13F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN34,267$844K<0.01%+13,89913F-HRTimelineGroup
Cambridge Investment Research Advisors,…33,464$824K<0.01%+2,51113F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\32,913$811K<0.01%+10,02913F-HR/ATimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources32,815$808K<0.01%013F-HRTimelineGroup
Main Management ETF Advisors, LLCin group Main Management ETF Advisors,…31,328$772K0.03%-2,81613F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC30,919$762K<0.01%+5,44913F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC29,342$723K<0.01%+10,65513F-HRTimelineGroup
NewEdge Advisors, LLC26,874$662K<0.01%+23,64513F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC26,791$660K0.01%-72,90913F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC23,065$568K<0.01%-239,13413F-HRTimelineGroup
IEQ CAPITAL, LLC22,835$562K0.01%new13F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/22,600$557K<0.01%+2,12113F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…22,306$549K<0.01%+3,50613F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…21,201$522K<0.01%+1,41513F-HRTimelineGroup
SIMPLEX TRADING, LLC21,212$522K0.01%-2,98313F-HRTimeline
IMC-Chicago, LLC20,906$515K0.01%new13F-HRTimeline
STRS OHIO20,900$515K<0.01%+4,30013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA20,543$506K<0.01%-20,47313F-HRTimelineGroup
Summit Global Investmentsin group Summit Global Investments20,049$494K0.03%new13F-HRTimelineGroup
GoalVest Advisory LLC20,000$493K0.14%013F-HRTimeline
Q Fund Management (Hong Kong) Ltd20,000$493K0.52%13F-HRTimeline
Informed Momentum Co LLC18,967$467K0.07%-114,21813F-HRTimeline
WOLVERINE TRADING, LLC17,874$450K0.01%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP18,222$449K<0.01%-62813F-HRTimelineGroup
Spire Wealth Managementin group Spire Wealth Management17,517$431K0.01%+2,62813F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC17,379$429K<0.01%+2,93713F-HRTimelineGroup
Corebridge Financial, Inc.in group Corebridge Financial, Inc.17,378$428K<0.01%-1,31213F-HRTimelineGroup
Advisory Services Network, LLC16,560$408K0.01%+3,30413F-HRTimeline
TFC Financial Management, Inc.16,471$406K0.06%013F-HRTimeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP16,073$396K<0.01%new13F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson15,800$389K<0.01%013F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/15,315$377K<0.01%-15,52613F-HRTimelineGroup
Sowell Financial Services LLC15,075$371K0.02%+3,67513F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC14,408$355K<0.01%new13F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.14,165$349K<0.01%-8,53813F-HR/ATimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC13,008$320K<0.01%new13F-HRTimelineGroup
Itau Unibanco Holding S.A.in group Itau Unibanco Holding S.A.12,447$314K0.01%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …12,607$311K<0.01%-19313F-HRTimelineGroup
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …12,500$308K<0.01%-30013F-HRTimelineGroup
Atria Wealth Solutions, Inc.12,475$307K<0.01%+50013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS12,339$304K<0.01%-10,34013F-HRTimelineGroup
ProShare Advisors LLC12,324$304K<0.01%+17313F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…12,197$300K<0.01%+44213F-HRTimeline
Man Group plcin group Man Group plc12,051$297K<0.01%-22,16713F-HRTimelineGroup
COMMONWEALTH EQUITY SERVICES, LLC11,855$292K<0.01%new13F-HRTimeline
Quantum Private Wealth, LLC11,423$281K0.09%new13F-HRTimeline
PFG Investments, LLC11,350$280K0.02%new13F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM11,092$273K<0.01%+43913F-HRTimeline
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…9,504$273K<0.01%-12,89113F-HRTimelineGroup
Private Advisor Group, LLC10,737$264K<0.01%new13F-HRTimeline
Kestra Advisory Services, LLCin group Kestra Advisory Services, LLC10,721$264K<0.01%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC10,605$261K<0.01%-56213F-HR/ATimelineGroup
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP10,200$251K<0.01%new13F-HRTimelineGroup
CIBC WORLD MARKET INC.10,069$248K<0.01%new13F-HRTimeline
GPS Wealth Strategies Group, LLC9,452$233K0.03%013F-HRTimeline
SCOTIA CAPITAL INC.9,395$231K<0.01%-59713F-HRTimeline
Tradewinds, LLC.7,131$225K0.06%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC8,207$202K<0.01%new13F-HRTimelineGroup
Police & Firemen's Retirement System of…7,950$196K<0.01%13F-HRTimeline
SG Americas Securities, LLC7,734$190K<0.01%-27913F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/7,434$183K<0.01%+1,48513F-HRTimelineGroup
KLP KAPITALFORVALTNING AS6,900$170K<0.01%13F-HRTimeline
CWM, LLCin group CWM, LLC5,293$130K<0.01%+2,89713F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…4,039$99.5K<0.01%-6,68713F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,345$82.4K<0.01%013F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…2,982$73.4K<0.01%+2,94813F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP2,958$72.9K<0.01%+2,70813F-HRTimelineGroup
STANCE CAPITAL LLC2,879$70.9K0.04%13F-HRTimeline
SBI Securities Co., Ltd.2,645$65.1K<0.01%13F-HRTimeline
Global Retirement Partners, LLC2,400$59.1K<0.01%-12013F-HRTimeline
CONCOURSE FINANCIAL GROUP SECURITIES, I…2,038$58.8K<0.01%-7,93613F-HRTimeline
Gen-Wealth Partners Inc2,355$58K0.02%new13F-HRTimeline
FMR LLCin group FMR LLC2,216$54.6K<0.01%-12,47413F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD2,000$49.3K<0.01%-90,80013F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.1,088$29.6K<0.01%013F-HRTimelineGroup
AMALGAMATED BANK1,181$29K<0.01%013F-HRTimeline
Quarry LP797$19.6K<0.01%+35713F-HRTimeline
Allworth Financial LP654$18.9K<0.01%+63913F-HRTimeline
FNY Investment Advisers, LLC758$18K0.01%new13F-HRTimeline
NISA INVESTMENT ADVISORS, LLC683$16.8K<0.01%+1113F-HRTimeline
Harel Insurance Investments & Financial…in group Harel Insurance Investments &…624$15K<0.01%-1,83013F-HRTimelineGroup
PRINCIPAL SECURITIES, INC.in group PRINCIPAL FINANCIAL GROUP INC525$12.9K<0.01%new13F-HRTimelineGroup
Park Square Financial Group, LLC493$12.1K0.01%13F-HRTimeline
Archer Investment Corp400$9.85K<0.01%013F-HRTimeline
Clearstead Trust, LLC393$9.68K<0.01%new13F-HRTimeline
AlphaQuest LLC345$8.5K<0.01%-3,40113F-HRTimeline
Federation des caisses Desjardins du Qu…313$7.71K<0.01%013F-HRTimeline
Capital Advisors, Ltd. LLC292$7K<0.01%013F-HRTimeline
GAMMA Investing LLC265$6.53K<0.01%+5713F-HRTimeline
SIGNATUREFD, LLC250$6.16K<0.01%013F-HRTimeline
COMERICA BANK222$5.47K<0.01%+3713F-HR/ATimeline
Avior Wealth Management, LLC200$4.93K<0.01%013F-HRTimeline
Venturi Wealth Management, LLC181$4.46K<0.01%new13F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…166$4.09K<0.01%-8,48613F-HRTimelineGroup
Parallel Advisors, LLC161$3.96K<0.01%-70013F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.160$3.94K<0.01%-313F-HRTimelineGroup
True Wealth Design, LLC159$3.92K<0.01%+3213F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…130$3.2K<0.01%new13F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\124$3.05K<0.01%new13F-HRTimelineGroup
GeoWealth Management, LLC102$2.51K<0.01%013F-HRTimeline
HARBOUR INVESTMENTS, INC.100$2.46K<0.01%new13F-HRTimeline
PRIVATE TRUST CO NA100$2.46K<0.01%-10013F-HRTimeline
HOEY INVESTMENTS, INC100$2.46K<0.01%new13F-HRTimeline
QUADRANT CAPITAL GROUP LLC85$2.09K<0.01%013F-HRTimeline
Blue Trust, Inc.55$1.35K<0.01%new13F-HR/ATimeline
HAGER INVESTMENT MANAGEMENT SERVICES, L…50$1.23K<0.01%13F-HRTimeline
Creative Planningin group Creative Planning49$1.21K<0.01%new13F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC40$985<0.01%+1013F-HRTimeline
WHITTIER TRUST CO OF NEVADA INC40$984<0.01%013F-HRTimeline
Sterling Capital Management LLC35$862<0.01%013F-HRTimeline
Caitong International Asset Management …30$739<0.01%13F-HR/ATimeline
Farther Finance Advisors, LLC30$739<0.01%013F-HRTimeline
IFP Advisors, Inc21$517<0.01%+1113F-HRTimeline
Lindbrook Capital, LLC14$345<0.01%013F-HRTimeline
JFS WEALTH ADVISORS, LLC10$247<0.01%013F-HRTimeline
Covestor Ltd4$00%013F-HRTimelineValue filed as zero, left out of ratios.