American Superconductor Corp. 13F holders
279 funds reported a position in American Superconductor Corp. in their 13F for the quarter ended 30 June 2026, together 35.8 million shares worth $1.49 billion. Against the quarter before, 62 opened a position, 108 added, 76 trimmed and 30 sold out; together they bought a net 2.3 million shares. The largest holders: BlackRock, Inc., Vanguard Capital Management LLC and Barrow Hanley Mewhinney & Strauss LLC.
Funds holding279+32 on Q1 2026
Shares they held35.8Mworth $1.49 billion
Net bought on the quarter2.3M sharesabout $94.9 million at the funds' values
Funds buying to selling170 to 106opened or added, to cut or sold
Opened 62Added 108Held 29Trimmed 76Sold out 30
What each fund did in AMSC against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in AMSC in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,241 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 54 reported a position in American Superconductor Corp.: 10 opened one, 20 added, 11 trimmed and 11 sold out, a net 169,259 shares bought.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 6 reported a position in American Superconductor Corp. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 1.2 million shares worth $51.6 million, 0.0% of its reported book. In the quarter, 1 fund added or opened a position and 5 trimmed or sold out; together they sold a net 852,679 shares, about $35.4 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 1,243,198 | $51.6 million | 0.0% | +74,046 | added | 30 June 2026 | 13F |
| Baillie Gifford | 933,308 | $38.7 million | 0.0% | -514,111 | trimmed | 30 June 2026 | 13F |
| Millennium Management | 100,762 | $4.2 million | 0.0% | -814 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 90,340 | $3.8 million | 0.0% | -78,676 | trimmed | 30 June 2026 | 13F |
| Citadel Advisors | 20,528 | $852,117 | 0.0% | -196,185 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 10,354 | $429,788 | 0.0% | -136,939 | trimmed | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 4,095,371 | 11.44% | $170.0 million | 0.00% | +112,721 | 13F |
| Vanguard Capital Management LLC | 2,034,219 | 5.68% | $84.4 million | 0.00% | -5,249 | 13F |
| Barrow Hanley Mewhinney & Strauss LLC | 1,704,006 | 4.76% | $70.7 million | 0.21% | +564,213 | 13F |
| UBS Group AG | 1,429,090 | 3.99% | $59.3 million | 0.01% | +829,269 | 13F |
| Vanguard Portfolio Management LLC | 1,418,863 | 3.96% | $58.9 million | 0.00% | -292,814 | 13F |
| State Street Corp. | 1,358,225 | 3.79% | $56.4 million | 0.00% | +97,154 | 13F |
| Goldman Sachs Group Inc. | 1,294,047 | 3.61% | $53.7 million | 0.01% | +584,543 | 13F |
| Geode Capital Management, LLC | 1,243,198 | 3.47% | $51.6 million | 0.00% | +74,046 | 13F |
| First Trust Advisors LP | 1,168,424 | 3.26% | $48.5 million | 0.03% | +390,156 | 13F |
| Oberweis Asset Management Inc. | 987,500 | 2.76% | $41.0 million | 0.85% | +137,600 | 13F |
| AWM Investment Company, Inc. | 951,604 | 2.66% | $39.5 million | 3.43% | +150,000 | 13F |
| Baillie Gifford & Co. | 933,308 | 2.61% | $38.7 million | 0.04% | -514,111 | 13F |
| Emerald Advisers, LLC | 843,956 | 2.36% | $35.0 million | 0.82% | +86,552 | 13F |
| Legal & General Group Plc | 756,863 | 2.11% | $31.4 million | 0.01% | +226,732 | 13F |
| Dimensional Fund Advisors LP | 645,991 | 1.80% | $26.8 million | 0.01% | -12,306 | 13F |
| Morgan Stanley | 635,833 | 1.78% | $26.4 million | 0.00% | +1,992 | 13F |
| Nuveen, LLC | 628,406 | 1.75% | $26.1 million | 0.01% | -392,541 | 13F |
| Telemark Asset Management, LLC | 600,000 | 1.68% | $24.9 million | 1.80% | no change | 13F |
| Royce & Associates LP | 555,821 | 1.55% | $23.1 million | 0.19% | +13,043 | 13F |
| Emerald Mutual Fund Advisers Trust | 538,955 | 1.51% | $22.4 million | 0.79% | +100,080 | 13F |
| Northern Trust Corp. | 433,792 | 1.21% | $18.0 million | 0.00% | +40,568 | 13F |
| Ranger Investment Management, L.P. | 405,266 | 1.13% | $16.8 million | 1.06% | new | 13F |
| Stephens Investment Management Group LLC | 402,762 | 1.12% | $16.7 million | 0.18% | +94,247 | 13F |
| Charles Schwab Investment Management Inc. | 399,125 | 1.11% | $16.6 million | 0.00% | +13,711 | 13F |
| Beau Ventures, LLc | 381,067 | 1.06% | $15.8 million | 1.72% | +200 | 13F |
| Panagora Asset Management Inc. | 375,515 | 1.05% | $15.6 million | 0.05% | +119,123 | 13F |
| D. E. Shaw & Co., Inc. | 366,845 | 1.02% | $15.2 million | 0.01% | -200,729 | 13F |
| BNP Paribas Financial Markets | 366,437 | 1.02% | $15.2 million | 0.01% | -70,250 | 13F |
| Algert Global LLC | 353,832 | 0.99% | $14.7 million | 0.17% | -136,139 | 13F |
| Price T Rowe Associates Inc. | 343,867 | 0.96% | $14.3 million | 0.00% | +285,255 | 13F |
| Vanguard Fiduciary Trust Co. | 337,929 | 0.94% | $14.0 million | 0.00% | +11,887 | 13F |
| T. Rowe Price Investment Management, Inc. | 306,182 | 0.86% | $12.7 million | 0.01% | new | 13F |
| HRT Financial LP | 298,420 | 0.83% | $12.4 million | 0.02% | new | 13F |
| Qube Research & Technologies Ltd | 250,573 | 0.70% | $10.4 million | 0.01% | -78,840 | 13F |
| Susquehanna International Group, LLP | 235,235 | 0.66% | $9.8 million | 0.01% | +173,421 | 13F |
| Arrowstreet Capital, Limited Partnership | 230,903 | 0.64% | $9.6 million | 0.00% | -215,849 | 13F |
| Essex Investment Management Co. LLC | 221,933 | 0.62% | $9.2 million | 1.21% | -5,625 | 13F |
| AQR Capital Management LLC | 194,477 | 0.54% | $8.1 million | 0.00% | +9,722 | 13F |
| Invesco Ltd. | 180,660 | 0.50% | $7.5 million | 0.00% | -60,132 | 13F |
| Russell Investments Group, Ltd. | 171,764 | 0.48% | $7.1 million | 0.01% | +134,400 | 13F |
| Jane Street Group, LLC | 170,319 | 0.48% | $7.1 million | 0.01% | new | 13F |
| Mackenzie Financial Corp. | 164,450 | 0.46% | $6.8 million | 0.01% | +86,908 | 13F |
| ArrowMark Colorado Holdings LLC | 159,432 | 0.45% | $6.6 million | 0.28% | +24,000 | 13F |
| Baird Financial Group, Inc. | 157,203 | 0.44% | $6.5 million | 0.01% | -6,055 | 13F |
| Palisades Investment Partners, LLC | 156,720 | 0.44% | $6.5 million | 1.85% | +4,144 | 13F |
| JPMorgan Chase & Co. | 149,502 | 0.42% | $6.0 million | 0.00% | +12,657 | 13F |
| Bank of New York Mellon Corp | 143,968 | 0.40% | $6.0 million | 0.00% | +9,178 | 13F |
| Allspring Global Investments Holdings, LLC | 130,622 | 0.36% | $5.2 million | 0.01% | -18,979 | 13F |
| Cambridge Investment Research Advisors, Inc. | 121,128 | 0.34% | $5.0 million | 0.01% | +72,577 | 13F |
| Raymond James Financial Inc. | 118,801 | 0.33% | $4.9 million | 0.00% | -5,153 | 13F |
The 50 largest of the 279 funds that reported a position in AMSC in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on AMSC
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Puts | 232,800 | $9.7 million | 30 June 2026 | 13F |
| Citadel Advisors | Calls | 176,300 | $7.3 million | 30 June 2026 | 13F |
| Point72 Asset Management | Calls | 7,100 | $294,721 | 30 June 2026 | 13F |
| Two Sigma Investments | Calls | 6,400 | $265,664 | 30 June 2026 | 13F |
| Point72 Asset Management | Puts | 900 | $37,359 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 31 July 2026 | 13G/A | Vanguard Capital Management and 1 other | 2.4 million | 4.9% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Capital Management and 1 other | 2.4 million | 5.0% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 30 January 2026 | 13G/A | The Vanguard Group and 1 other | 3.5 million | 7.4% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 21 September 2026 | 339 | $30.19 | SEC |
| 10 September 2026 | 407 | $29.31 | SEC |
| 8 September 2026 | 159 | $29.55 | SEC |
| 24 August 2026 | 719 | $30.01 | SEC |
| 21 August 2026 | 79 | $30.05 | SEC |
| 20 August 2026 | 45 | $31.16 | SEC |
| 18 August 2026 | 469 | $32.13 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.