13F reference 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 Q3 2026
Institutions Reporting
278
Shares (Excl. Options)
35.74M
Full value: 35,739,750 · shares · 30 Jun 2026Price
$41.51
The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.
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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
- 35,739,750
- Total 13F value
- $1,482,546,448
- Portfolio coverage rank
- 0%
- Share change
- +2,283,680
- Value change
- +$105,295,585
- Number of holders
- 278
- Shares outstanding
- 48,487,323
- SEC-reported price per share
- $29.11
- Insider filing price
- $29.11
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
Filing notes and source
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 244 to 278 between Q1 2026 and Q2 2026.
- SEC-reported value moved from to
$1.12B
Full value: $1,122,561,594 · USD · 31 Mar 2026.$1.48B
Full value: $1,482,546,448 · USD · 30 Jun 2026
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
13F reference 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
shares of
AMERICAN SUPERCONDUCTOR CORP /DE/ - Common Stock (AMSC).
This represents
74%
of the company’s total
outstanding shares.
35.74M
Full value: 35,739,750 · shares · 30 Jun 202648.49M
Full value: 48,487,323 · shares · Stored outstanding share count13F 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 |
| Beau Ventures, LLc | 0.79% | 381,067 | +0.05% | 1.7% | $15,818,091 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
47
Headline period
Q2 2026
Rows shown
1-25 of 47
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 1,313,797 | $38,272,368 | +$6,415,956 | $29.11 | 55 |
| 2026 Q2 | 35,739,750 | $1,482,546,448 | +$105,295,585 | $41.51 | 278 |
| 2026 Q1 | 33,182,409 | $1,122,561,594 | -$11,925,519 | $33.85 | 244 |
| 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 |