On this page, we present all of the funds holding AMSC from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding AMSC, with a link to that fund's top holdings. The next columns indicate the amount of AMSC stock held by each of the funds holding AMSC, followed by the AMSC position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 106 funds holding AMSC within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by AWM Investment Company Inc.. For more details on the positions held by AWM Investment Company Inc. (or by any of the other funds holding AMSC), click the fund name in the "Holder" column of the funds-holding-AMSC table below.

Holder	Amount	Position Size ($ in 1000's)	As of
AWM Investment Company Inc.	2,228,301	$24,823	12/31/2023
AMSC	2,228,301	$24,823	12/31/2023
Baillie Gifford & Co.	2,086,279	$23,241	12/31/2023
AMSC	2,086,279	$23,241	12/31/2023
Vanguard Group Inc.	1,302,120	$14,506	12/31/2023
AMSC	1,302,120	$14,506	12/31/2023
Royce & Associates LP	1,245,860	$13,879	12/31/2023
AMSC	1,245,860	$13,879	12/31/2023
Invesco Ltd.	864,914	$9,635	12/31/2023
AMSC	864,914	$9,635	12/31/2023
Dimensional Fund Advisors LP	683,698	$7,617	12/31/2023
AMSC	683,698	$7,617	12/31/2023
Susquehanna International Group LLP		$7,352	12/31/2023
Call	526,900	$5,870	12/31/2023
AMSC	172,225	$1,919	12/31/2023
Put	39,200	$437	12/31/2023
Essex Investment Management Co. LLC	624,018	$6,952	12/31/2023
AMSC	624,018	$6,952	12/31/2023
BlackRock Inc.	613,300	$6,832	12/31/2023
AMSC	613,300	$6,832	12/31/2023
D. E. Shaw & Co. Inc.	435,744	$4,854	12/31/2023
AMSC	435,744	$4,854	12/31/2023
ArrowMark Colorado Holdings LLC	431,432	$4,806	12/31/2023
AMSC	431,432	$4,806	12/31/2023
Jane Street Group LLC		$4,683	12/31/2023
AMSC	213,499	$2,378	12/31/2023
Call	206,900	$2,305	12/31/2023
Millennium Management LLC	412,767	$4,598	12/31/2023
AMSC	412,767	$4,598	12/31/2023
Oberweis Asset Management Inc.	375,800	$4,186	12/31/2023
AMSC	375,800	$4,186	12/31/2023
State Street Corp	339,357	$3,780	12/31/2023
AMSC	339,357	$3,780	12/31/2023
Group One Trading L.P.		$3,743	12/31/2023
Call	353,600	$3,939	12/31/2023
Put	17,600	$196	12/31/2023
Laurion Capital Management LP	300,323	$3,346	12/31/2023
AMSC	300,323	$3,346	12/31/2023
Geode Capital Management LLC	294,961	$3,287	12/31/2023
AMSC	294,961	$3,287	12/31/2023
Wolverine Trading LLC		$3,212	12/31/2023
Call	288,300	$3,212	12/31/2023
Citadel Advisors LLC		$3,023	12/31/2023
AMSC	262,230	$2,921	12/31/2023
Call	113,900	$1,269	12/31/2023
Put	104,800	$1,167	12/31/2023
First Trust Advisors LP	237,235	$2,643	12/31/2023
AMSC	237,235	$2,643	12/31/2023
Qube Research & Technologies Ltd	231,634	$2,580	12/31/2023
AMSC	231,634	$2,580	12/31/2023
CM Management LLC	195,000	$2,172	12/31/2023
AMSC	195,000	$2,172	12/31/2023
Assenagon Asset Management S.A.	142,192	$1,921	03/31/2024
AMSC	142,192	$1,921	03/31/2024
Morgan Stanley	161,385	$1,798	12/31/2023
AMSC	161,385	$1,798	12/31/2023
Bridgeway Capital Management Inc.	144,700	$1,612	12/31/2023
AMSC	144,700	$1,612	12/31/2023
Connor Clark & Lunn Investment Management Ltd.	121,834	$1,357	12/31/2023
AMSC	121,834	$1,357	12/31/2023
Balyasny Asset Management LLC	114,047	$1,270	12/31/2023
AMSC	114,047	$1,270	12/31/2023
Trexquant Investment LP	111,825	$1,246	12/31/2023
AMSC	111,825	$1,246	12/31/2023
Legato Capital Management LLC	89,667	$1,211	03/31/2024
AMSC	89,667	$1,211	03/31/2024
Marshall Wace LLP	105,909	$1,180	12/31/2023
AMSC	105,909	$1,180	12/31/2023
Merit Financial Group LLC	82,389	$918	12/31/2023
AMSC	82,389	$918	12/31/2023
Prescott Group Capital Management L.L.C.	81,091	$903	12/31/2023
AMSC	81,091	$903	12/31/2023
Graham Capital Management L.P.	77,330	$861	12/31/2023
AMSC	77,330	$861	12/31/2023
Cubist Systematic Strategies LLC	71,117	$792	12/31/2023
AMSC	71,117	$792	12/31/2023
ExodusPoint Capital Management LP	65,373	$728	12/31/2023
AMSC	65,373	$728	12/31/2023
Man Group plc	63,248	$705	12/31/2023
AMSC	63,248	$705	12/31/2023
EAM Investors LLC	59,538	$663	12/31/2023
AMSC	59,538	$663	12/31/2023
Northern Trust Corp	59,093	$658	12/31/2023
AMSC	59,093	$658	12/31/2023
GSA Capital Partners LLP	57,784	$644	12/31/2023
AMSC	57,784	$644	12/31/2023
Barclays PLC	55,609	$620	12/31/2023
AMSC	55,609	$620	12/31/2023
Jump Financial LLC	55,409	$617	12/31/2023
AMSC	55,409	$617	12/31/2023
Cambridge Investment Research Advisors Inc.	45,367	$613	03/31/2024
AMSC	45,367	$613	03/31/2024
Simplex Trading LLC		$602	03/31/2024
Put	119,100	$1,609	03/31/2024
Call	110,100	$1,487	03/31/2024
AMSC	53,662	$724	03/31/2024
IMC Chicago LLC		$592	03/31/2024
Put	54,700	$739	03/31/2024
Call	51,300	$693	03/31/2024
AMSC	47,219	$638	03/31/2024
Bank of America Corp DE	51,577	$575	12/31/2023
AMSC	51,577	$575	12/31/2023
Goldman Sachs Group Inc.	49,978	$557	12/31/2023
AMSC	49,978	$557	12/31/2023
Cetera Advisors LLC	41,021	$457	12/31/2023
AMSC	41,021	$457	12/31/2023
GTS Securities LLC		$448	12/31/2023
AMSC	43,153	$481	12/31/2023
Put	25,700	$286	12/31/2023
Call	22,700	$253	12/31/2023
Mitsubishi UFJ Kokusai Asset Management Co. Ltd.	40,333	$440	12/31/2023
AMSC	40,333	$440	12/31/2023
Citigroup Inc.	37,353	$416	12/31/2023
AMSC	37,353	$416	12/31/2023
Squarepoint Ops LLC	37,347	$416	12/31/2023
AMSC	37,347	$416	12/31/2023
GoalVest Advisory LLC	29,930	$404	03/31/2024
AMSC	29,930	$404	03/31/2024
Belvedere Trading LLC		$370	12/31/2023
Call	33,200	$370	12/31/2023
Cannon Global Investment Management LLC	25,500	$345	03/31/2024
AMSC	25,500	$345	03/31/2024
Healthcare of Ontario Pension Plan Trust Fund	28,121	$313	12/31/2023
AMSC	28,121	$313	12/31/2023
Royal Bank of Canada	27,920	$311	12/31/2023
AMSC	27,920	$311	12/31/2023
Landscape Capital Management L.L.C.	27,754	$309	12/31/2023
AMSC	27,754	$309	12/31/2023
Harel Insurance Investments & Financial Services Ltd.	26,312	$293	12/31/2023
AMSC	26,312	$293	12/31/2023
Acadian Asset Management LLC	25,044	$278	12/31/2023
AMSC	25,044	$278	12/31/2023
Bank of New York Mellon Corp	19,587	$265	03/31/2024
AMSC	19,587	$265	03/31/2024
683 Capital Management LLC	23,650	$263	12/31/2023
AMSC	23,650	$263	12/31/2023
Bailard Inc.	22,200	$247	12/31/2023
AMSC	22,200	$247	12/31/2023
Walleye Capital LLC		$238	12/31/2023
Call	21,400	$238	12/31/2023
Jefferies Financial Group Inc.	21,300	$237	12/31/2023
AMSC	21,300	$237	12/31/2023
Joule Financial LLC	20,621	$230	12/31/2023
AMSC	20,621	$230	12/31/2023
Oppenheimer & Co. Inc.	20,200	$225	12/31/2023
AMSC	20,200	$225	12/31/2023
Two Sigma Investments LP	18,000	$201	12/31/2023
AMSC	18,000	$201	12/31/2023
Schonfeld Strategic Advisors LLC	17,456	$194	12/31/2023
AMSC	17,456	$194	12/31/2023
XTX Topco Ltd	17,289	$193	12/31/2023
AMSC	17,289	$193	12/31/2023
Price T Rowe Associates Inc. MD	16,911	$189	12/31/2023
AMSC	16,911	$189	12/31/2023
TFC Financial Management	16,471	$183	12/31/2023
AMSC	16,471	$183	12/31/2023
Charles Schwab Investment Management Inc.	15,966	$178	12/31/2023
AMSC	15,966	$178	12/31/2023
Walleye Trading LLC		$178	12/31/2023
Call	16,300	$182	12/31/2023
Put	400	$4	12/31/2023
Atria Wealth Solutions Inc.	14,469	$161	12/31/2023
AMSC	14,469	$161	12/31/2023
Greenwich Wealth Management LLC	14,366	$160	12/31/2023
AMSC	14,366	$160	12/31/2023
ProShare Advisors LLC	12,325	$137	12/31/2023
AMSC	12,325	$137	12/31/2023
LPL Financial LLC	11,199	$125	12/31/2023
AMSC	11,199	$125	12/31/2023
Mirabella Financial Services LLP	11,180	$125	12/31/2023
AMSC	11,180	$125	12/31/2023
GPS Wealth Strategies Group LLC	10,652	$119	12/31/2023
AMSC	10,652	$119	12/31/2023
Advisor Group Holdings Inc.	7,915	$88	12/31/2023
AMSC	7,915	$88	12/31/2023
AJOVista LLC	6,221	$69	12/31/2023
AMSC	6,221	$69	12/31/2023
Point72 Asia Singapore Pte. Ltd.	5,962	$66	12/31/2023
AMSC	5,962	$66	12/31/2023
Global Retirement Partners LLC	2,520	$34	03/31/2024
AMSC	2,520	$34	03/31/2024
Psagot Value Holdings Ltd. Israel	2,917	$33	12/31/2023
AMSC	2,917	$33	12/31/2023
UBS Group AG	2,715	$30	12/31/2023
AMSC	2,715	$30	12/31/2023
Wells Fargo & Company MN	2,096	$23	12/31/2023
AMSC	2,096	$23	12/31/2023
FMR LLC	1,567	$17	12/31/2023
AMSC	1,567	$17	12/31/2023
Rhumbline Advisers	1,388	$15	12/31/2023
AMSC	1,388	$15	12/31/2023
Wetzel Investment Advisors Inc.	500	$7	03/31/2024
AMSC	500	$7	03/31/2024
Nisa Investment Advisors LLC	540	$6	12/31/2023
AMSC	540	$6	12/31/2023
Creative Planning	550	$6	12/31/2023
AMSC	550	$6	12/31/2023
Tower Research Capital LLC TRC	478	$5	12/31/2023
AMSC	478	$5	12/31/2023
Arrow Financial Corp	345	$4	12/31/2023
AMSC	345	$4	12/31/2023
First Manhattan Co.	150	$2	12/31/2023
AMSC	150	$2	12/31/2023
Private Trust Co. NA	100	$1	03/31/2024
AMSC	100	$1	03/31/2024
Spire Wealth Management	64	$1	03/31/2024
AMSC	64	$1	03/31/2024
GAMMA Investing LLC	107	$1	03/31/2024
AMSC	107	$1	03/31/2024
US Bancorp DE	128	$1	12/31/2023
AMSC	128	$1	12/31/2023
Proequities Inc.		$0	12/31/2023
Put	0	$0	12/31/2023
AMSC	0	$0	12/31/2023
Call	0	$0	12/31/2023
Whittier Trust Co. of Nevada Inc.	40	$0	12/31/2023
AMSC	40	$0	12/31/2023
JFS Wealth Advisors LLC	10	$0	12/31/2023
AMSC	10	$0	12/31/2023
Advisory Services Network LLC	10	$0	12/31/2023
AMSC	10	$0	12/31/2023
IFP Advisors Inc	10	$0	12/31/2023
AMSC	10	$0	12/31/2023
Farther Finance Advisors LLC	30	$0	12/31/2023
AMSC	30	$0	12/31/2023
PEAK6 Investments LLC		$-97	12/31/2023
Put	54,200	$604	12/31/2023
Call	45,500	$507	12/31/2023
Crawford Fund Management LLC	112,200	$-1,250	12/31/2023
Put	112,200	$1,250	12/31/2023

See Summary: Institutional Holders of AMSC
See Details: Top 10 Hedge Funds Holding AMSC
Also See: AMSC Insider Buying
Also See: AMSC Holdings Changes

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