American Superconductor Corporation (AMSC) Ownership

18.00 ↑0.54 (3.09%)

As of December 31, 1969, 7:00pm EST.

Institutions
Mutual Funds

Institutional Ownership

BlackRock Inc is the biggest individual institutional holder of American Superconductor Corporation (AMSC), owning a total of 3.4 million shares. Combined, the top 57 institutional holders of AMSC own 77.46% of the company with a total of 29.5 million shares.

In the latest ownership report on December 31st 2024, the top 57 institutional holders increased their combined ownership of AMSC by 431 thousand shares. 10 institutions bought 1,851,489 total additional shares and increased their ownership by an average of 67.68%. However 8 institutions sold 1,420,659 total shares and decreased their ownership by an average of 12.89%.

Overall this is a positive sign as the number of shares owned by the top 20 institutional holders of American Superconductor Corporation increased by a net total of 430,830 in the latest quarter.

Institution Ownership Chart

Latest Institutional Ownership Changes

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
BlackRock Inc	8.687%	25.989%	3,427,893	707,110	2024-12-31
Vanguard Group Inc	5.633%	-8.381%	2,222,935	-203,343	2024-12-31
Baillie Gifford & Co Limited.	4.181%	-21.677%	1,649,790	-456,605	2024-12-31
Awm Investment Company Inc	3.836%	-11.959%	1,513,478	-205,589	2024-12-31
Hood River Capital Management LLC	3.133%	-13.673%	1,236,146	-195,794	2024-12-31
Macquarie Group Ltd	2.636%	4.481%	1,040,179	44,613	2024-12-31
Driehaus Capital Management LLC	2.389%	18.020%	942,698	143,936	2024-12-31
State Street Corp	2.304%	0.336%	909,295	3,045	2024-12-31
Nuveen Asset Management, LLC	2.227%	-14.722%	878,624	-151,686	2024-12-31
Geode Capital Management, LLC	2.171%	1.067%	856,455	9,043	2024-12-31
Royce & Associates, LP	2.126%	-12.170%	838,932	-116,242	2024-12-31
Oberweis Asset Management Inc	1.684%	0.000%	664,400	0	2024-12-31
Dimensional Fund Advisors, Inc.	1.658%	7.625%	654,299	46,354	2024-12-31
Telemark Asset Management, LLC	1.521%	0.000%	600,000	0	2024-12-31
Wellington Management Company LLP	1.169%	0.000%	461,230	461,230	2024-12-31
Morgan Stanley - Brokerage Accounts	1.110%	16.101%	438,171	60,766	2024-12-31
Essex Investment Management Company, LLC	1.089%	-7.455%	429,876	-34,630	2024-12-31
UBS Group AG	1.079%	600.145%	425,877	365,050	2024-12-31
Allspring Global Investments Holdings, LLC	0.956%	-13.076%	377,375	-56,770	2024-12-31
Legal & General Group PLC	0.881%	3.067%	347,549	10,342	2024-12-31

Top Institutions

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
BlackRock Inc	8.687%	25.989%	3,427,893	707,110	2024-12-31
Vanguard Group Inc	5.633%	-8.381%	2,222,935	-203,343	2024-12-31
Baillie Gifford & Co Limited.	4.181%	-21.677%	1,649,790	-456,605	2024-12-31
Awm Investment Company Inc	3.836%	-11.959%	1,513,478	-205,589	2024-12-31
Hood River Capital Management LLC	3.133%	-13.673%	1,236,146	-195,794	2024-12-31
Assenagon Asset Management SA	2.760%	643.406%	1,057,064	914,872	2024-06-30
Macquarie Group Ltd	2.636%	4.481%	1,040,179	44,613	2024-12-31
Driehaus Capital Management LLC	2.389%	18.020%	942,698	143,936	2024-12-31
State Street Corp	2.304%	0.336%	909,295	3,045	2024-12-31
Nuveen Asset Management, LLC	2.227%	-14.722%	878,624	-151,686	2024-12-31
Geode Capital Management, LLC	2.171%	1.067%	856,455	9,043	2024-12-31
Royce & Associates, LP	2.126%	-12.170%	838,932	-116,242	2024-12-31
Oberweis Asset Management Inc	1.684%	0.000%	664,400	0	2024-12-31
Dimensional Fund Advisors, Inc.	1.658%	7.625%	654,299	46,354	2024-12-31
D. E. Shaw & Co LP	1.648%	125.631%	650,257	362,062	2024-06-30
Telemark Asset Management, LLC	1.521%	0.000%	600,000	0	2024-12-31
Amvescap Plc.	1.364%	-19.562%	538,399	-130,937	2024-09-30
Wellington Management Company LLP	1.169%	0.000%	461,230	461,230	2024-12-31
Kbc Group NV	1.493%	0.000%	459,007	0	2023-09-30
Morgan Stanley - Brokerage Accounts	1.110%	16.101%	438,171	60,766	2024-12-31
Essex Investment Management Company, LLC	1.089%	-7.455%	429,876	-34,630	2024-12-31
Connor Clark & Lunn Inv Mgmt Ltd	1.080%	-18.483%	426,261	-96,652	2024-09-30
UBS Group AG	1.079%	600.145%	425,877	365,050	2024-12-31
Arosa Capital Management LP	1.333%	29.929%	389,786	89,786	2022-06-30
Citadel Advisors Llc	0.965%	216.464%	380,795	260,467	2024-06-30
Allspring Global Investments Holdings, LLC	0.956%	-13.076%	377,375	-56,770	2024-12-31
Millennium Management LLC	0.950%	-24.980%	374,848	-124,819	2024-06-30
Goldman Sachs Group Inc	0.920%	45.382%	362,829	113,260	2024-06-30
Legal & General Group PLC	0.881%	3.067%	347,549	10,342	2024-12-31
State Street Corporation	0.903%	-1.545%	334,115	-5,242	2024-03-31
Qube Research & Technologies	0.866%	38.244%	320,220	88,586	2024-03-31
ArrowMark Colorado Holdings, LLC (ArrowMark Partne	0.828%	-28.973%	306,432	-125,000	2024-03-31
Charles Schwab Investment Management Inc	0.772%	211.146%	304,528	206,655	2024-09-30
Northern Trust Corp	0.763%	243.000%	300,986	213,235	2024-09-30
LAURION CAPITAL MANAGEMENT LP	0.812%	0.000%	300,323	300,323	2024-03-31
First Trust Advisors L.P.	0.679%	5.871%	251,163	13,928	2024-03-31
CM Management, LLC	0.692%	28.205%	250,000	55,000	2024-03-31
Cubist Systematic Strategies, LLC	0.653%	231.997%	236,106	164,989	2024-03-31
JANE STREET GROUP, LLC	0.591%	0.000%	213,499	213,499	2023-12-31
GSA Capital Partners LLP	0.620%	-4.310%	187,861	-8,462	2023-06-30
Susquehanna International Group, LLP	0.477%	85.457%	172,225	79,360	2023-12-31
Two Sigma Investments LLC	0.535%	1,545.720%	164,572	154,572	2023-09-30
EAM Investors, LLC	0.508%	-43.478%	156,157	-120,117	2023-09-30
Bridgeway Capital Management, LLC	0.400%	103.230%	144,700	73,500	2023-12-31
Engineers Gate Manager LP	0.447%	0.000%	130,573	130,573	2022-06-30
State Of Wisconsin Investment Board	0.423%	110.903%	123,800	65,100	2022-06-30
Balyasny Asset Management LLC	0.316%	0.000%	114,047	114,047	2023-12-31
HRT FINANCIAL LLC	0.389%	0.000%	113,751	113,751	2022-06-30
Trexquant Investment LP	0.310%	-34.559%	111,825	-59,055	2023-12-31
GMT Capital Corp	0.356%	0.000%	108,066	0	2023-06-30
Man Group PLC	0.357%	65.913%	105,446	41,891	2022-09-30
Bank of America Corp	0.346%	80.904%	102,285	45,744	2022-09-30
Renaissance Technologies Corp	0.346%	-25.349%	102,189	-34,700	2022-12-31
JPMorgan Chase & Co	0.297%	-64.309%	89,938	-162,049	2023-03-31
Legato Capital Management LLC	0.296%	0.000%	89,667	89,667	2023-09-30
Merit Financial Group, LLC	0.260%	5.194%	78,847	3,893	2023-06-30
Marshall Wace Asset Management Ltd	0.235%	-16.804%	69,669	-14,072	2022-12-31

Mutual Fund Ownership

Vanguard Total Stock Mkt Idx Inv is the biggest individual fund holder of American Superconductor Corporation (AMSC), owning a total of 1.2 million shares. Combined, the top 55 mutual fund holders of AMSC own 47.38% of the company with a total of 17.7 million shares.

In the latest ownership report on March 31st 2025, the top 55 fund holders increased their combined ownership of AMSC by 53 thousand shares. 1 funds bought 62,198 total additional shares and increased their ownership by an average of 38.20%. However 2 funds sold 9,451 total shares and decreased their ownership by an average of 0.67%.

Overall this is a positive sign as the number of shares owned by the top 20 mutual funds holding American Superconductor Corporation increased by a net total of 52,747 in the latest report.

Mutual Funds Chart

Latest Mutual Fund Ownership Changes

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
iShares Russell 2000 ETF	2.329%	-0.860%	919,047	-7,975	2025-03-31
iShares Russell 2000 Growth ETF	0.785%	-0.474%	309,918	-1,476	2025-03-31
Invesco WilderHill Clean Energy ETF	0.570%	38.195%	225,041	62,198	2025-03-31

Top Mutual Funds

Owner	Percent Owned	Percent Change	Shares Owned	Share Change	Date Reported
Vanguard Total Stock Mkt Idx Inv	3.023%	0.000%	1,192,880	0	2025-02-28
iShares Russell 2000 ETF	2.329%	-0.860%	919,047	-7,975	2025-03-31
Vanguard Instl Ttl Stck Mkt Idx Tr	2.720%	20.447%	824,756	140,008	2023-03-31
Hood River Small-Cap Growth Instl	2.066%	-11.246%	815,211	-103,293	2024-12-31
AZ InvestEd Ivy Small Cap Growth E	1.923%	3.387%	758,767	24,856	2025-02-28
Delaware Ivy Small Cap Growth C	1.872%	8.356%	738,385	56,938	2024-10-31
Macquarie Small Cap Growth C	1.860%	3.996%	733,911	28,203	2025-01-31
Edinburgh Worldwide Ord	1.675%	-20.697%	661,103	-172,534	2024-12-31
Oberweis Micro-Cap	1.608%	0.000%	634,400	0	2024-12-31
Oberweis Micro-Cap Growth	1.608%	0.000%	634,400	0	2024-12-31
Vanguard Institutional Extnd Mkt Idx Tr	1.541%	0.145%	607,898	880	2025-02-28
Baillie Gifford Global Discovery A Acc	1.160%	-7.616%	457,734	-37,737	2025-01-31
Vanguard Extended Market Index Investor	1.347%	2.083%	407,978	8,325	2023-08-31
Nuveen Quant Small Cap Equity R6	1.003%	-0.690%	395,690	-2,750	2025-01-31
CREF Stock R1	0.958%	0.000%	377,980	0	2025-01-31
Heptagon Driehaus US Micro Cap Eq C$ Acc	0.903%	-10.464%	356,485	-41,663	2025-02-28
Fidelity Small Cap Index	0.875%	-1.838%	345,269	-6,466	2025-01-31
Invesco Dorsey Wright SmallCap Momt ETF	0.839%	0.182%	331,119	600	2024-12-31
YieldMax Ultra Option Income Strat ETF	0.824%	0.000%	325,000	0	2024-10-31
Old Westbury Small & Mid Cap Strategies	0.821%	20.591%	314,431	53,690	2024-04-30
iShares Russell 2000 Growth ETF	0.785%	-0.474%	309,918	-1,476	2025-03-31
Legg Mason RY US SmCp Opp A USD Dis(A)	1.026%	67.256%	302,900	121,800	2022-12-31
Vanguard Explorer Inv	0.748%	163.776%	295,057	183,198	2024-09-30
Royce Smaller-Companies Growth Svc	0.959%	23.857%	280,349	54,000	2022-09-30
SPDR® S&P Kensho New Economies Comps ETF	0.950%	0.000%	277,870	0	2022-11-30
L&G Clean Energy ETF USD Acc	0.674%	0.000%	265,905	0	2025-02-28
Baillie Gifford WW Discovery B USD Acc	0.605%	-4.284%	238,675	-10,682	2025-01-31
Invesco WilderHill Clean Energy ETF	0.570%	38.195%	225,041	62,198	2025-03-31
Royce Small-Cap Opportunity Invmt	0.545%	-22.522%	215,080	-62,520	2024-12-31
Fidelity Extended Market Index	0.543%	-0.633%	214,392	-1,366	2025-02-28
Invesco Dorsey Wright IndustrialsMomtETF	0.552%	0.380%	211,460	801	2024-09-30
SPDR® Kensho Clean Power ETF	0.556%	0.000%	205,601	0	2024-05-31
Meridian Contrarian Legacy	0.521%	-16.637%	205,432	-41,000	2024-09-30
State St Russell Sm/Mid Cp® Indx NL Cl C	0.493%	0.000%	194,553	0	2025-02-28
Schwab US Small-Cap ETF™	0.478%	0.000%	188,664	0	2025-02-28
FTGF RY US SmCp Opp A USD Dis(A)	0.476%	-0.142%	187,615	-266	2025-02-28
Royce Micro-Cap Invmt	0.451%	-26.688%	172,739	-62,884	2024-06-30
Fidelity® Extended Market Index	0.546%	10.429%	165,513	15,631	2023-11-30
Pear Tree Essex Environmental Opps Ins	0.433%	96.958%	156,282	76,934	2023-12-31
First Trust NASDAQ® Cln Edge® GrnEngyETF	0.346%	0.481%	127,841	612	2024-05-30
EAM Ultra Micro Cap	0.415%	0.000%	127,493	0	2023-11-30
Driehaus Micro Cap Growth USD	0.333%	0.000%	120,417	120,417	2024-03-31
Royce Micro Cap Trust	0.316%	9.613%	114,244	10,019	2024-03-31
Royce Capital Micro-Cap Inv	0.304%	0.000%	109,700	0	2023-12-31
DFA US Small Cap I	0.290%	0.000%	104,923	0	2024-02-29
Bridgeway Ultra-Small Company	0.273%	0.000%	98,500	98,500	2023-12-31
Royce Pennsylvania Mutual Invmt	0.258%	0.000%	93,326	0	2023-12-31
Bridgeway Ultra-Small Company Market	0.297%	0.000%	90,000	0	2023-06-30
Dimensional US Small Cap ETF	0.244%	0.000%	88,314	0	2024-02-27
BlackRock Extended Mkt Composite	0.261%	0.000%	80,302	0	2023-09-30
DFA US Micro Cap I	0.262%	0.000%	79,416	0	2023-10-31
MUKAM Cleantech Stock Index MF	0.266%	74.641%	78,510	33,555	2022-08-17
BlackRock Extended Equity Market K	0.232%	8.432%	70,352	5,471	2023-06-30
iShares Micro-Cap ETF	0.211%	0.000%	62,294	0	2023-03-31
Dimensional US Targeted Value ETF	0.202%	2.034%	59,195	1,180	2022-12-30