American Superconductor Corporation
MX ˙ BMV ˙ US0301112076
SecurityMX:AMSC / American Superconductor Corporation
InstitutionJpmorgan Chase & Co
Latest Disclosed Ownership136,845 shares
Latest Disclosed Value $ 4,407,777
Jpmorgan Chase & Co reports 11.16% increase in ownership of AMSC / American Superconductor Corporation

On May 13, 2026 - Jpmorgan Chase & Co filed a 13F-HR/A form disclosing ownership of 136,845 shares of American Superconductor Corporation (MX:AMSC) valued at $4,407,777 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 123,103 shares of American Superconductor Corporation. This represents a change in shares of 11.16% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 136,845 13,742 11.16 4,408 24.42 0.0000
2026-02-11 2025-12-31 13F AMERICAN SUPERCONDUCTOR COR COMMON 030111207 123,103 8,215 7.15 3,543 -48.09 0.0002
2025-11-26 2025-09-30 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 114,888 59,251 106.50 6,823 234.30 0.0004
2025-11-07 2025-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 114,888 59,251 6,823 0.0000
2025-08-12 2025-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 55,637 -2,810 -4.81 2,041 92.55 0.0001
2025-05-12 2025-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 58,447 8,435 16.87 1,060 -13.89 0.0001
2025-02-12 2024-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 50,012 3,295 7.05 1,232 11.71 0.0001
2024-12-26 2024-09-30 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 46,717 -39,460 -45.79 1,103 -45.31 0.0001
2024-11-08 2024-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 46,717 -39,460 1,103 0.0001
2024-12-26 2024-06-30 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 86,177 55,109 177.38 2,016 380.91 0.0002
2024-08-12 2024-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 86,177 55,109 2,016 0.0002
2024-12-26 2024-03-31 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 31,068 31,068 420 0.0000
2024-05-10 2024-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 31,068 31,068 420 0.0000
2023-11-14 2023-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 0 -56,610 -100.00 0 -100.00
2023-08-11 2023-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 56,610 -33,328 -37.06 354 -19.91 0.0000
2023-05-18 2023-03-31 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 89,938 -162,049 -64.31 442 0.0001
2023-05-11 2023-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 89,938 -162,049 442 0.0000
2023-02-13 2022-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 251,987 49,242 24.29 1 -100.00 0.0001
2022-11-14 2022-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 202,745 26,595 15.10 888 -2.74 0.0001
2022-08-11 2022-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 176,150 37,976 27.48 913 -13.21 0.0001
2022-05-11 2022-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 138,174 59,028 74.58 1,052 22.18 0.0001
2022-02-11 2021-12-31 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 79,146 -1,865 -2.30 861 -27.03 0.0001
2022-02-10 2021-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 79,146 -1,865 861 0.0001
2021-11-12 2021-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 81,011 -183,955 -69.43 1,180 -74.40 0.0001
2021-08-12 2021-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 264,966 77,259 41.16 4,609 29.50 0.0005
2021-05-12 2021-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 187,707 95,846 104.34 3,559 65.46 0.0005
2021-02-19 2020-12-31 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 91,861 74,274 422.32 2,151 665.48 0.0003
2021-02-11 2020-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 91,861 74,274 2,151 53.1958
2020-11-12 2020-09-30 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 17,587 -16,713 -48.73 281 1.08 0.0000
2020-11-12 2020-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 17,587 281
2020-08-11 2020-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 34,300 -314,695 -90.17 278 -85.46 0.0001
2020-05-12 2020-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 348,995 -242,620 -41.01 1,912 -58.83 0.0004
2020-02-11 2019-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 591,615 489,469 479.19 4,644 479.78 0.0009
2019-11-12 2019-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 102,146 96,377 1,670.60 801 1,470.59 0.0002
2019-08-07 2019-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 5,769 5,283 1,087.04 51 750.00 0.0000
2019-05-07 2019-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 486 0 0.00 6 20.00 0.0000
2019-02-11 2018-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 486 0 0.00 5 66.67 0.0000
2018-11-13 2018-09-30 13F/A-1 AMERICAN SUPERCONDUCTOR COMMON 030111207 486 0 0.00 3 0.00 0.0000
2018-11-07 2018-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 486 0 3
2018-08-14 2018-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 486 0 0.00 3 0.00 0.0000
2018-05-10 2018-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 486 -7,231 -93.70 3 -89.29 0.0000
2018-02-13 2017-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 7,717 2,607 51.02 28 27.27 0.0000
2017-11-09 2017-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 5,110 4,087 399.51 22 450.00 0.0000
2017-08-09 2017-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 1,023 -7,394 -87.85 4 -92.98 0.0000
2017-05-10 2017-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 8,417 -10,003 -54.31 57 -58.09 0.0000
2017-02-06 2016-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 18,420 18,052 4,905.43 136 4,433.33 0.0000
2016-11-04 2016-09-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 368 0 0.00 3 0.00 0.0000
2016-08-08 2016-06-30 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 368 0 0.00 3 0.00 0.0000
2016-05-10 2016-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 368 0 0.00 3 50.00 0.0000
2016-02-12 2015-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111207 368 368 2 0.0000
2015-05-15 2015-03-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111108 0 -10,724 -100.00 0 -100.00
2015-02-13 2014-12-31 13F AMERICAN SUPERCONDUCTOR COMMON 030111108 10,724 -35,021 -76.56 8 -87.50 0.0000
2014-12-08 2014-09-30 13F/A-1 AMER SUPER CONDUCT COMMON 030111108 45,745 5,134 12.64 64 -4.48 0.0000
2014-11-14 2014-09-30 13F AMER SUPER CONDUCT COMMON 030111108 45,745 64
2014-09-03 2014-06-30 13F/A-1 AMER SUPER CONDUCT COMMON 030111108 40,611 1,110 2.81 67 6.35 0.0000
2014-08-14 2014-06-30 13F AMER SUPER CONDUCT COMMON 030111108 40,611 67
2014-05-15 2014-03-31 13F AMER SUPER CONDUCT COMMON 030111108 39,501 -2,214 -5.31 63 -7.35 0.0000
2014-02-26 2013-12-31 13F/A-1 AMER SUPER CONDUCT COMMON 030111108 41,715 -59,923 -58.96 68 -71.31 0.0000
2014-02-13 2013-12-31 13F AMER SUPER CONDUCT COMMON 030111108 41,715 68
2013-10-31 2013-09-30 13F AMER SUPER CONDUCT COMMON 030111108 101,638 7,579 8.06 237 -4.44 0.0001
2013-08-13 2013-06-30 13F AMER SUPER CONDUCT COMMON 030111108 94,059 94,059 248 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.