Latest Period
Q2 2026
Security Snapshot
AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC) Institutional Ownership
CUSIP: 030111207
13F Institutional Holders and Ownership History from Q1 2015 to Q2 2026
Institutions Reporting
278
Shares (Excl. Options)
35,362,522
Price
$41.51
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- Security type / class
- Equity / Common Stock
- Symbol
- AMSC on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 35,362,522
- Total 13F value
- $1,466,887,715
- Portfolio coverage rank
- 0%
- Share change
- +2,287,319
- Value change
- +$105,446,641
- Number of holders
- 278
- Shares outstanding
- 48,487,323
- SEC-reported price per share
- $30.53
- Insider filing price
- $30.53
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- AMSC - AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock is tracked under CUSIP 030111207.
- 278 institutions reported positions in Q2 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 243 to 278 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $1,122,555,390 to $1,466,887,715.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 278 institutions filings for Q2 2026.
Security key
030111207
Latest holder period
Q2 2026
13F holders
278
13D/G owners
3
CIK / CUSIP context first
Open Q2 2026 holders
AMSC full holder history
AMERICAN SUPERCONDUCTOR CORP /DE/ SEC filings
AMERICAN SUPERCONDUCTOR CORP /DE/ company facts
AMERICAN SUPERCONDUCTOR CORP /DE/ insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 030111207:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
AMSC
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 7.1% | -18% | $56,355,183 | -$12,648,303 | 2,799,562 | -18% | BlackRock, Inc. | 31 Mar 2025 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.9% | -1.4% | $85,959,683 | +$204,576 | 2,390,425 | +0.24% | Vanguard Capital Management | 30 Jun 2026 |
| BAILLIE GIFFORD & CO | 4.2% | -22% | $33,210,273 | -$9,191,459 | 1,649,790 | -22% | BAILLIE GIFFORD & CO | 31 Dec 2024 |
As of 30 Jun 2026, 278 institutional investors reported holding 35,362,522 shares of AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC). This represents 73% of the company’s total 48,487,323 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
53%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.4% | 4,095,371 | +2.8% | 0% | $169,998,850 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.2% | 2,034,219 | -0.26% | 0% | $84,440,431 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | 3.5% | 1,704,006 | +50% | 0.21% | $70,733,289 |
| UBS Group AG | 2.9% | 1,429,090 | +138% | 0.01% | $59,321,525 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.9% | 1,418,863 | -17% | 0% | $58,897,003 |
| STATE STREET CORP | 2.8% | 1,358,225 | +7.7% | 0% | $56,379,920 |
| GOLDMAN SACHS GROUP INC | 2.7% | 1,294,047 | +82% | 0.01% | $53,715,891 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.6% | 1,243,198 | +6.3% | 0% | $51,615,468 |
| FIRST TRUST ADVISORS LP | 2.4% | 1,168,424 | +50% | 0.03% | $48,501,280 |
| OBERWEIS ASSET MANAGEMENT INC/ | 2% | 987,500 | +16% | 0.85% | $40,991,125 |
| AWM Investment Company, Inc. | 2% | 951,604 | +19% | 3.4% | $39,501,082 |
| BAILLIE GIFFORD & CO | 1.9% | 933,308 | -36% | 0.04% | $38,741,615 |
| EMERALD ADVISERS, LLC | 1.7% | 843,956 | +11% | 0.82% | $35,032,614 |
| Legal & General Group Plc | 1.6% | 756,863 | +43% | 0.01% | $31,417,382 |
| DIMENSIONAL FUND ADVISORS LP | 1.3% | 645,991 | -1.9% | 0% | $26,809,456 |
| MORGAN STANLEY | 1.3% | 635,832 | +0.31% | 0% | $26,393,387 |
| Nuveen, LLC | 1.3% | 628,406 | -38% | 0.01% | $26,085,133 |
| Telemark Asset Management, LLC | 1.2% | 600,000 | 0% | 1.8% | $24,906,000 |
| ROYCE & ASSOCIATES LP | 1.1% | 555,821 | +2.4% | 0.19% | $23,072,130 |
| EMERALD MUTUAL FUND ADVISERS TRUST | 1.1% | 538,955 | +23% | 0.79% | $22,372,022 |
| NORTHERN TRUST CORP | 0.89% | 433,792 | +10% | 0% | $18,006,706 |
| Ranger Investment Management, L.P. | 0.84% | 405,266 | 1.1% | $16,822,592 | |
| Stephens Investment Management Group LLC | 0.83% | 402,762 | +31% | 0.18% | $16,718,651 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.82% | 399,125 | +3.6% | 0% | $16,567,679 |
| PANAGORA ASSET MANAGEMENT INC | 0.77% | 375,515 | +46% | 0.05% | $15,587,628 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
46
Latest
Q2 2026
Rows shown
1-25 of 46
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 35,362,522 | $1,466,887,715 | +$105,446,641 | $41.51 | 278 |
| 2026 Q1 | 33,182,219 | $1,122,555,390 | -$11,921,699 | $33.85 | 243 |
| 2025 Q4 | 33,048,995 | $951,775,692 | -$100,425,515 | $28.78 | 238 |
| 2025 Q3 | 32,698,988 | $1,940,981,155 | +$32,935,326 | $59.39 | 270 |
| 2025 Q2 | 32,674,926 | $1,198,934,947 | +$198,037,144 | $36.69 | 228 |
| 2025 Q1 | 27,561,821 | $500,035,162 | -$3,552,043 | $18.14 | 189 |
| 2024 Q4 | 27,521,153 | $678,105,741 | +$7,292,176 | $24.63 | 190 |
| 2024 Q3 | 27,198,756 | $641,943,684 | -$3,178,845 | $23.60 | 170 |
| 2024 Q2 | 27,193,223 | $636,078,474 | +$100,747,508 | $23.39 | 154 |
| 2024 Q1 | 23,096,288 | $312,018,202 | +$95,933,897 | $13.51 | 127 |
| 2023 Q4 | 16,047,561 | $178,757,920 | +$32,158,997 | $11.14 | 98 |
| 2023 Q3 | 13,211,392 | $99,745,426 | +$1,953,457 | $7.55 | 71 |
| 2023 Q2 | 13,090,639 | $81,943,982 | -$222,130 | $6.26 | 75 |
| 2023 Q1 | 13,147,722 | $64,556,424 | +$440,557 | $4.91 | 73 |
| 2022 Q4 | 13,144,355 | $48,365,833 | -$3,622,597 | $3.68 | 74 |
| 2022 Q3 | 13,931,654 | $61,023,588 | +$2,317,476 | $4.38 | 74 |
| 2022 Q2 | 13,250,274 | $68,637,400 | -$15,464,888 | $5.18 | 81 |
| 2022 Q1 | 15,674,969 | $119,452,725 | -$11,388,520 | $7.61 | 96 |
| 2021 Q4 | 16,381,893 | $178,146,496 | -$7,328,930 | $10.88 | 99 |
| 2021 Q3 | 16,697,055 | $242,925,738 | +$3,477,984 | $14.58 | 93 |
| 2021 Q2 | 16,351,935 | $284,837,911 | +$433,500 | $17.39 | 96 |
| 2021 Q1 | 16,184,271 | $306,573,897 | -$32,714,323 | $18.96 | 99 |
| 2020 Q4 | 17,342,165 | $405,527,098 | +$91,556,015 | $23.42 | 101 |
| 2020 Q3 | 13,877,546 | $201,594,232 | +$35,621,311 | $14.48 | 83 |
| 2020 Q2 | 11,598,459 | $94,116,585 | +$5,240,209 | $8.13 | 71 |