AMSC Institutional Ownership & Shareholders
AMERICAN SUPERCONDUCTOR CORP (AMSC) is currently held by 267 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $1.44B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of AMSC tracked by InsiderSet, reporting ownership valued at approximately $170.00M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $107.91M, representing an estimated loss of -36.52% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% of the total disclosed AMSC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Barrow Hanley Mewhinney & Strauss Llc, and several other long-term asset managers with concentrated positions in AMERICAN SUPERCONDUCTOR CORP (AMSC).
This page ranks the largest institutional AMSC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
267
Total Reported Value
$1.44B
Largest Holder
Blackrock, Inc.
Largest Position
$170.00M
Insider Transactions (90d)
1
Latest Filing Quarter
Q2 2026
New Institutional Positions
65
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 4,095,371 | $169,998,850 | $107,913,026 | -$62,085,824 | -36.52% | |
| Vanguard Capital Management Llc | 0.00% | 2,034,219 | $84,440,431 | $53,601,671 | -$30,838,760 | -36.52% | |
| Barrow Hanley Mewhinney & Strauss Llc | 0.21% | 1,704,006 | $70,733,289 | $44,900,558 | -$25,832,731 | -36.52% | |
| Ubs Group Ag | 0.01% | 1,429,090 | $59,321,525 | $37,656,522 | -$21,665,004 | -36.52% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,418,863 | $58,897,003 | $37,387,040 | -$21,509,963 | -36.52% | |
| State Street Corp | 0.00% | 1,358,225 | $56,379,920 | $35,789,229 | -$20,590,691 | -36.52% | |
| Goldman Sachs Group Inc | 0.01% | 1,294,047 | $53,715,891 | $34,098,138 | -$19,617,753 | -36.52% | |
| Geode Capital Management, Llc | 0.00% | 1,243,198 | $51,615,468 | $32,758,267 | -$18,857,201 | -36.53% | |
| First Trust Advisors Lp | 0.03% | 1,168,424 | $48,501,280 | $30,787,972 | -$17,713,308 | -36.52% | |
| Oberweis Asset Management Inc/ | 0.85% | 987,500 | $40,991,125 | $26,020,625 | -$14,970,500 | -36.52% | |
| Awm Investment Company, Inc. | 3.43% | 951,604 | $39,501,082 | $25,074,765 | -$14,426,317 | -36.52% | |
| Baillie Gifford & Co | 0.04% | 933,308 | $38,741,615 | $24,592,666 | -$14,148,949 | -36.52% | |
| Emerald Advisers, Llc | 0.82% | 843,956 | $35,032,614 | $22,238,241 | -$12,794,373 | -36.52% | |
| Legal & General Group Plc | 0.01% | 756,863 | $31,417,382 | $19,943,340 | -$11,474,042 | -36.52% | |
| Dimensional Fund Advisors Lp | 0.00% | 645,991 | $26,809,456 | $17,021,863 | -$9,787,593 | -36.51% | |
| Morgan Stanley | 0.00% | 635,833 | $26,393,466 | $16,754,200 | -$9,639,266 | -36.52% | |
| Nuveen, Llc | 0.01% | 628,406 | $26,085,133 | $16,558,498 | -$9,526,635 | -36.52% | |
| Telemark Asset Management, Llc | 1.80% | 600,000 | $24,906,000 | $15,810,000 | -$9,096,000 | -36.52% | |
| Royce & Associates Lp | 0.19% | 555,821 | $23,072,130 | $14,645,883 | -$8,426,247 | -36.52% | |
| Emerald Mutual Fund Advisers Trust | 0.79% | 538,955 | $22,372,022 | $14,201,464 | -$8,170,558 | -36.52% | |
| Northern Trust Corp | 0.00% | 433,792 | $18,006,706 | $11,430,419 | -$6,576,287 | -36.52% | |
| Ranger Investment Management, L.P. | 1.06% | 405,266 | $16,822,592 | $10,678,759 | -$6,143,833 | -36.52% | |
| Stephens Investment Management Group Llc | 0.18% | 402,762 | $16,718,651 | $10,612,779 | -$6,105,872 | -36.52% | |
| Charles Schwab Investment Management Inc | 0.00% | 399,125 | $16,567,679 | $10,516,944 | -$6,050,735 | -36.52% | |
| Panagora Asset Management Inc | 0.05% | 375,515 | $15,587,628 | $9,894,820 | -$5,692,808 | -36.52% | |
| D. E. Shaw & Co., Inc. | 0.01% | 366,845 | $15,227,736 | $9,666,366 | -$5,561,370 | -36.52% | |
| Bnp Paribas Financial Markets | 0.01% | 366,437 | $15,210,800 | $9,655,615 | -$5,555,185 | -36.52% | |
| Algert Global Llc | 0.17% | 353,832 | $14,687,566 | $9,323,473 | -$5,364,093 | -36.52% | |
| Price T Rowe Associates Inc | 0.00% | 343,867 | $14,274,000 | $9,060,895 | -$5,213,105 | -36.52% | |
| Vanguard Fiduciary Trust Co | 0.00% | 337,929 | $14,027,433 | $8,904,429 | -$5,123,004 | -36.52% | |
| T. Rowe Price Investment Management, Inc. | 0.01% | 306,182 | $12,710,000 | $8,067,896 | -$4,642,104 | -36.52% | |
| Hrt Financial Lp | 0.02% | 298,420 | $12,387,000 | $7,863,367 | -$4,523,633 | -36.52% | |
| Qube Research & Technologies Ltd | 0.01% | 250,573 | $10,401,285 | $6,602,599 | -$3,798,686 | -36.52% | |
| Susquehanna International Group, Llp | 0.01% | 235,235 | $9,764,605 | $6,198,442 | -$3,566,163 | -36.52% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 230,903 | $9,584,784 | $6,084,294 | -$3,500,490 | -36.52% | |
| Aqr Capital Management Llc | 0.00% | 194,477 | $8,072,740 | $5,124,469 | -$2,948,271 | -36.52% | |
| Invesco Ltd. | 0.00% | 180,660 | $7,499,197 | $4,760,391 | -$2,738,806 | -36.52% | |
| Russell Investments Group, Ltd. | 0.01% | 171,764 | $7,129,984 | $4,525,981 | -$2,604,003 | -36.52% | |
| Jane Street Group, Llc | 0.00% | 170,319 | $7,069,942 | $4,487,906 | -$2,582,036 | -36.52% | |
| Brown Capital Management Llc | 1.32% | 239,521 | $6,972,456 | $6,311,378 | -$661,078 | -9.48% | |
| Arrowmark Colorado Holdings Llc | 0.28% | 159,432 | $6,618,022 | $4,201,033 | -$2,416,989 | -36.52% | |
| Baird Financial Group, Inc. | 0.01% | 157,203 | $6,525,497 | $4,142,299 | -$2,383,198 | -36.52% | |
| Jpmorgan Chase & Co | 0.00% | 149,502 | $6,040,140 | $3,939,378 | -$2,100,762 | -34.78% | |
| Essex Investment Management Co Llc | 0.89% | 205,382 | $5,978,670 | $5,411,816 | -$566,854 | -9.48% | |
| Bank Of New York Mellon Corp | 0.00% | 143,968 | $5,976,092 | $3,793,557 | -$2,182,535 | -36.52% | |
| Palisades Investment Partners, Llc | 1.52% | 180,123 | $5,243,381 | $4,746,241 | -$497,140 | -9.48% | |
| Allspring Global Investments Holdings, Llc | 0.01% | 130,622 | $5,214,430 | $3,441,890 | -$1,772,540 | -33.99% | |
| Raymond James Financial Inc | 0.00% | 118,801 | $4,931,429 | $3,130,406 | -$1,801,023 | -36.52% | |
| Ameriprise Financial Inc | 0.00% | 111,856 | $4,643,143 | $2,947,406 | -$1,695,737 | -36.52% | |
| Gmt Capital Corp | 0.23% | 108,066 | $4,485,820 | $2,847,539 | -$1,638,281 | -36.52% |
Frequently asked questions about AMSC
Who are the largest institutional holders of AMSC?
The largest institutional holders of AMSC reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Capital Management Llc, Barrow Hanley Mewhinney & Strauss Llc, Ubs Group Ag, and Vanguard Portfolio Management Llc. InsiderSet ranks institutional holders by their latest reported AMSC position.
What is AMSC institutional ownership?
This page tracks AMSC positions reported by institutional investment managers through SEC Form 13F. AMERICAN SUPERCONDUCTOR CORP (AMSC) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own AMSC?
InsiderSet currently tracks 267 institutional managers reporting AMSC holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of AMSC shareholders.
How much AMSC stock do institutions own?
Institutional investment managers disclosed approximately $1.44B in AMSC holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was AMSC institutional ownership last updated?
The latest AMSC institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional AMSC holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its AMSC position after the reporting date.
Are institutions buying or selling AMSC?
Institutional buying and selling can be analyzed by comparing AMSC positions across consecutive 13F reporting periods. InsiderSet's AMSC Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View AMSC ownership changes.
How has AMSC institutional ownership changed over time?
InsiderSet tracks AMSC institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.