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American Superconductor Ownership | Who Owns American Superconductor?

OverviewForecastRevenueFinancialsChartTranscripts

American Superconductor Ownership Summary

American Superconductor is owned by 51.33% institutional investors, 3.64% insiders, and 45.04% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 8.53% of AMSC shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.88% of its assets in American Superconductor shares.

AMSC Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockAmerican Superconductor51.33%3.64%45.04%
SectorIndustrials Stocks 44.97%12.43%42.61%
IndustryIndustrial Machinery Stocks47.74%9.56%42.70%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock funding, inc. /de3.75M8.53%$107.94M
Blackrock2.54M8.53%$59.50M
Vanguard group3.53M8.02%$101.50M
Baillie gifford1.51M3.43%$43.37M
Driehaus capital management1.22M3.14%$72.39M
State street1.14M2.92%$67.46M
Geode capital management1.09M2.48%$31.40M
Nuveen asset management878.62K2.38%$21.64M
Nuveen960.97K2.19%$27.66M
Atreides management, lp771.50K1.98%$45.82M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Heights capital management340.10K3.33%$12.48M
Essex investment management245.58K2.23%$14.59M
Awm investment company754.22K2.10%$21.71M
Telemark asset management619.90K1.78%$17.84M
Palisades investment partners144.21K1.57%$4.15M
Oberweis asset management inc/665.70K1.51%$39.54M
Virtus etf advisers25.99K1.01%$1.54M
Crawford fund management160.00K0.94%$3.74M
Atreides management, lp771.50K0.89%$45.82M
Lumbard & kellner71.16K0.72%$2.05M

Top Buyers

HolderShares% AssetsChange
Blackrock2.54M0.00%1.80M
Vanguard group3.53M0.00%576.83K
Ubs group744.56K0.00%550.83K
Arrowstreet capital, limited partnership760.46K0.03%524.06K
Driehaus capital management1.22M0.52%379.10K

Top Sellers

HolderShares% AssetsChange
Hood river capital management---1.17M
Fuller & thaler asset management---809.95K
Macquarie group---465.22K
Goldman sachs group782.29K0.00%-391.82K
Atreides management, lp771.50K0.89%-332.96K

New Positions

HolderShares% AssetsChangeValue
Heights capital management340.10K3.33%340.10K$12.48M
Voloridge investment management171.61K0.03%171.61K$10.19M
Y-intercept (hong kong)120.25K0.08%120.25K$3.46M
Dynamic technology lab private69.22K0.45%69.22K$1.99M
Campbell & co investment adviser59.95K0.08%59.95K$1.73M

Sold Out

HolderChange
Tortoise investment management-2.00
Wealthtrak capital management-5.00
Larson financial group-18.00
Stephens consulting-20.00
Hantz financial services-20.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Dec 31, 2025165-44.26%22,561,639-31.00%510.73%90-47.06%46-42.50%
Sep 30, 202528319.41%31,868,8696.18%811.38%1613.21%7649.02%
Jun 30, 202524718.75%32,547,64018.09%831.56%15957.43%54-19.40%
Mar 31, 2025206-1.90%27,597,6580.35%731.37%100-16.67%6734.00%
Dec 31, 20242069.57%25,842,142-4.65%681.28%11617.17%50-3.85%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Vanguard Total Stock Mkt Idx Inv1.30M2.88%-29.07K
Vanguard US Total Market Shares ETF1.11M2.82%-
iShares Russell 2000 ETF923.17K2.04%-
Delaware Ivy Small Cap Growth C681.45K1.73%557.59K
Hood River Small-Cap Growth Instl756.13K1.67%-59.08K
Oberweis Micro-Cap Growth634.40K1.40%-
Oberweis Micro-Cap634.40K1.40%-
Edinburgh Worldwide Ord607.40K1.34%-53.70K
AZ InvestEd Ivy Small Cap Growth E529.30K1.17%-127.49K
CREF Stock R3471.44K1.04%27.20K

Recent Insider Transactions

DateNameRoleActivityValue
Jun 18, 2019OLIVER DAVID R JR-Buy$1.67K
Aug 08, 2025House Arthur H-Sell$494.08K
Aug 04, 2022Klein Margaret D.-Buy$2.78K
Aug 04, 2025McGahn Daniel P Chairman, President and CEOSell$3.97M
Aug 04, 2025McGahn Daniel P Chairman, President and CEOSell$1.53M

Insider Transactions Trends

DateBuySell
2025 Q3-6
2025 Q2-12
2024 Q4-1
2024 Q3--
2024 Q2-6

AMSC Ownership FAQ

Who Owns American Superconductor?

American Superconductor shareholders are primarily institutional investors at 51.33%, followed by 3.64% insiders and 45.03% retail investors. The average institutional ownership in American Superconductor's industry, Industrial Machinery Stocks, is 47.74%, which American Superconductor exceeds.

Who owns the most shares of American Superconductor?

American Superconductor’s largest shareholders are Blackrock funding, inc. /de (3.75M shares, 8.53%), Blackrock (2.54M shares, 8.53%), and Vanguard group (3.53M shares, 8.02%). Together, they hold 25.08% of American Superconductor’s total shares outstanding.

Does Blackrock own American Superconductor?

Yes, BlackRock owns 8.53% of American Superconductor, totaling 2.54M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 59.5M$. In the last quarter, BlackRock increased its holdings by 1.8M shares, a 240.90% change.

Who is American Superconductor’s biggest shareholder by percentage of total assets invested?

Heights capital management is American Superconductor’s biggest shareholder by percentage of total assets invested, with 3.33% of its assets in 340.1K American Superconductor shares, valued at 12.48M$.

Who is the top mutual fund holder of American Superconductor shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of American Superconductor shares, with 2.88% of its total shares outstanding invested in 1.3M American Superconductor shares.

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