AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC)
CUSIP: 030111207
Q1 2026 13F Holders as of 31 Mar 2026
- Type / Class
- Equity / Common Stock
- Shares outstanding
- 47,694,720
- Total 13F shares
- 4,486,242
- Share change
- -32,004
- Total reported value
- $151,667,721
- Price per share
- $33.85
- Number of holders
- 73
- Value change
- +$221,687
- Number of buys
- 43
- Number of sells
- 27
Quarterly Holders Quick Answers
What is CUSIP 030111207?
CUSIP 030111207 identifies AMSC - AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock in SEC institutional holdings data.
Need full ownership history?
Open the full security ownership history page.
Next holder-history checks
These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.
- Back to full security ownership history for the broader multi-quarter picture.
- Latest 13F filings for newly reported positions across managers.
- Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
- SEC investors directory for manager drilldown.
Explore More Reporting Periods
Jump to adjacent filing periods for faster comparison and easier crawl discovery.
- Previous quarter: Q4 2025
Recent filing periods for CUSIP 030111207:
Top shareholders of AMSC - AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
|
Company |
7.1%
from 13D/G
|
3,750,403
|
$107,936,611 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
7.4%
|
3,526,632
|
$101,496,470 | — | 31 Dec 2025 | |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
|
Vanguard Capital Management |
5%
|
2,384,736
|
$80,723,314 | $0 | 31 Mar 2026 | |
| Daniel P. McGahn |
3/4/5
|
Chairman, President and CEO, Director |
2.5%
|
1,196,022
|
$65,717,243 | -$9,657,151 | 04 Aug 2025 | |
| BAILLIE GIFFORD & CO |
13F
13D/G
|
Company |
4.2%
from 13D/G
|
1,506,841
|
$43,366,884 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
2.5%
|
1,192,093
|
$34,308,437 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.3%
|
1,090,710
|
$31,396,276 | — | 31 Dec 2025 | |
| Atreides Management, LP |
13F
|
Company |
2.2%
|
1,044,193
|
$30,051,875 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
2%
|
960,968
|
$27,656,659 | — | 31 Dec 2025 | |
| OBERWEIS ASSET MANAGEMENT INC/ |
13F
|
Company |
1.8%
|
835,900
|
$24,057,202 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
1.6%
|
782,287
|
$22,514,220 | — | 31 Dec 2025 | |
| EMERALD ADVISERS, LLC |
13F
|
Company |
1.6%
|
757,568
|
$21,802,807 | — | 31 Dec 2025 | |
| AWM Investment Company, Inc. |
13F
|
Company |
1.6%
|
754,220
|
$21,706,452 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
1.6%
|
744,563
|
$21,428,523 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.5%
|
705,442
|
$20,302,656 | — | 31 Dec 2025 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
1.4%
|
683,202
|
$19,662,554 | — | 31 Dec 2025 | |
| FIRST TRUST ADVISORS LP |
13F
|
Company |
1.4%
|
682,967
|
$19,655,790 | — | 31 Dec 2025 | |
| John W. Kosiba Jr. |
3/4/5
|
SVP, CFO & Treasurer |
0.74%
|
352,890
|
$19,454,543 | -$5,224,458 | 04 Aug 2025 | |
| Telemark Asset Management, LLC |
13F
|
Company |
1.3%
|
619,900
|
$17,840,722 | — | 31 Dec 2025 | |
| Qube Research & Technologies Ltd |
13F
|
Company |
1.3%
|
599,006
|
$17,239,393 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.1%
|
540,253
|
$15,549,050 | — | 31 Dec 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
1%
|
499,984
|
$14,389,540 | — | 31 Dec 2025 | |
| ALGERT GLOBAL LLC |
13F
|
Company |
0.97%
|
460,771
|
$13,261,000 | — | 31 Dec 2025 | |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. |
13F
|
Company |
0.96%
|
459,786
|
$13,233,000 | — | 31 Dec 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
0.93%
|
443,148
|
$12,753,800 | — | 31 Dec 2025 | |
| EMERALD MUTUAL FUND ADVISERS TRUST |
13F
|
Company |
0.91%
|
435,246
|
$12,526,380 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.81%
|
387,507
|
$11,152,458 | — | 31 Dec 2025 | |
| ROYCE & ASSOCIATES LP |
13F
|
Company |
0.81%
|
387,069
|
$11,139,846 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.81%
|
386,152
|
$11,113,456 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.76%
|
360,806
|
$10,383,996 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.71%
|
337,713
|
$9,719,380 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.67%
|
321,571
|
$9,254,813 | — | 31 Dec 2025 | |
| Legal & General Group Plc |
13F
|
Company |
0.58%
|
278,026
|
$8,001,587 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
0.58%
|
274,844
|
$7,911,000 | — | 31 Dec 2025 | |
| PANAGORA ASSET MANAGEMENT INC |
13F
|
Company |
0.53%
|
254,785
|
$7,332,712 | — | 31 Dec 2025 | |
| TUDOR INVESTMENT CORP ET AL |
13F
|
Company |
0.53%
|
251,642
|
$7,242,257 | — | 31 Dec 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.51%
|
242,767
|
$6,986,835 | — | 31 Dec 2025 | |
| Allspring Global Investments Holdings, LLC |
13F
|
Company |
0.43%
|
204,678
|
$6,463,731 | — | 31 Dec 2025 | |
| ESSEX INVESTMENT MANAGEMENT CO LLC |
13F
|
Company |
0.45%
|
215,154
|
$6,192,132 | — | 31 Dec 2025 | |
| Stephens Investment Management Group LLC |
13F
|
Company |
0.37%
|
174,228
|
$5,014,282 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.35%
|
165,568
|
$4,765,048 | — | 31 Dec 2025 | |
| BALYASNY ASSET MANAGEMENT L.P. |
13F
|
Company |
0.32%
|
152,795
|
$4,397,440 | — | 31 Dec 2025 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.31%
|
145,965
|
$4,200,873 | — | 31 Dec 2025 | |
| Palisades Investment Partners, LLC |
13F
|
Company |
0.3%
|
144,209
|
$4,150,335 | — | 31 Dec 2025 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.3%
|
141,811
|
$4,081,321 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.29%
|
139,989
|
$4,028,883 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.29%
|
137,042
|
$3,944,056 | — | 31 Dec 2025 | |
| Baird Financial Group, Inc. |
13F
|
Company |
0.28%
|
134,899
|
$3,882,394 | — | 31 Dec 2025 | |
| AXIOM INVESTORS LLC /DE |
13F
|
Company |
0.28%
|
134,076
|
$3,858,707 | — | 31 Dec 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.28%
|
133,918
|
$3,854,160 | — | 31 Dec 2025 |
Institutional Holders of AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC) as of Q1 2026
As of 31 Mar 2026,
AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC) was held by
73 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
4,486,242 shares.
The largest 10 holders included
Nuveen, LLC, EMERALD ADVISERS, LLC, UBS Group AG, EMERALD MUTUAL FUND ADVISERS TRUST, Stephens Investment Management Group LLC, Palisades Investment Partners, LLC, Allspring Global Investments Holdings, LLC, Bank of New York Mellon Corp, LPL Financial LLC, and NEW YORK STATE COMMON RETIREMENT FUND.
This page lists
73
institutional shareholders reporting positions in this security
for the Q1 2026 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
237
Q1 2026 holders
73
Holder diff
-164
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 Value $ | Q1 2026 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.