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    American Superconductor Corporation (AMSC)

    -NasdaqGS
    4.94 Up 0.04(0.82%) 3:59PM EDT
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    Major HoldersGet Major Holders for:
    Breakdown
    % of Shares Held by All Insider and 5% Owners:19%
    % of Shares Held by Institutional & Mutual Fund Owners:22%
    % of Float Held by Institutional & Mutual Fund Owners:27%
    Number of Institutions Holding Shares:94

    Major Direct Holders (Forms 3 & 4)
    HolderSharesReported
    DOUGLAS KEVIN834,533Apr 24, 2015
    MCGAHN DANIEL P132,947Jul 31, 2015
    HENRY DAVID A97,580Jul 31, 2015
    MAGUIRE JAMES F86,547Jul 31, 2015
    BUDHRAJA VIKRAM S11,939Apr 6, 2015


    Top Institutional Holders
    HolderShares% OutValue*Reported
    AWM Investment Company, Inc.1,250,0009.056,537,500Jun 30, 2015
    Vanguard Group, Inc. (The)361,0442.611,888,260Jun 30, 2015
    BlackRock Institutional Trust Company, N.A.190,7861.38997,810Jun 30, 2015
    Summit Partners Public Asset Management LLC184,3751.33964,281Jun 30, 2015
    Renaissance Technologies, LLC181,4881.31949,182Jun 30, 2015
    Jacobs Levy Equity Management, Inc.82,0170.59428,948Jun 30, 2015
    Geode Capital Management, LLC65,0450.47340,185Jun 30, 2015
    CALPERS (California-Public Employees Retirement System)48,7700.35255,067Jun 30, 2015
    Ironwood Investment Management, LLC44,3960.32232,191Jun 30, 2015
    GMT Capital Corp41,4650.30216,861Jun 30, 2015

    Top Mutual Fund Holders
    HolderShares% OutValue*Reported
    Vanguard Total Stock Market Index Fund105,7860.77681,261Mar 31, 2015
    Vanguard Extended Market Index Fund71,9380.52463,280Mar 31, 2015
    Northern Lights Fd Tr III-Footprints Discover Value Fd68,6470.50442,086Mar 31, 2015
    Spartan Extended Market Index Fund49,3720.36258,215Jun 30, 2015
    Vanguard Institutional Index-Inst Total Stock Market Ind34,4590.25221,915Mar 31, 2015
    iShares Micro Cap ETF25,1530.18131,550Jun 30, 2015
    Russell (Frank) U.S. Small Cap Equity Fund15,7900.1182,581Jun 30, 2015
    Spartan Total Market Index Fund12,6770.0966,300Jun 30, 2015
    Vanguard Balanced Index Fund11,3190.0872,894Mar 31, 2015
    TFS Capital Investment Tr-Tfs Market Neutral Fund7,1450.0546,228Apr 30, 2015

    View Transactions for Insiders & Institutional Holders

    Value shown is computed using the security's price on the report date given.

    Currency in USD.