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<SEC-DOCUMENT>0000950123-10-102629.txt : 20101109
<SEC-HEADER>0000950123-10-102629.hdr.sgml : 20101109
<ACCEPTANCE-DATETIME>20101108180225
ACCESSION NUMBER:		0000950123-10-102629
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20101109
DATE AS OF CHANGE:		20101108

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMERICAN SUPERCONDUCTOR CORP /DE/
		CENTRAL INDEX KEY:			0000880807
		STANDARD INDUSTRIAL CLASSIFICATION:	MOTORS & GENERATORS [3621]
		IRS NUMBER:				042959321
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-170455
		FILM NUMBER:		101173677

	BUSINESS ADDRESS:	
		STREET 1:		SIXTY FOUR JACKSON ROAD
		CITY:			DEVENS
		STATE:			MA
		ZIP:			01434
		BUSINESS PHONE:		9788423000

	MAIL ADDRESS:	
		STREET 1:		SIXTY FOUR JACKSON ROAD
		CITY:			DEVENS
		STATE:			MA
		ZIP:			01434
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B5
<SEQUENCE>1
<FILENAME>b83344e424b5.htm
<DESCRIPTION>424B5
<TEXT>
<HTML>
<HEAD>
<TITLE>e424b5</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->

<TABLE style="color: #FF0000" width="100%" border="1" cellpadding="5"><TR><TD style=text-align:justify>
<B><FONT style="font-size: 10pt; color: #F93F26">The information
in this preliminary prospectus supplement and the accompanying
prospectus is not complete and may be changed. This prospectus
supplement and the accompanying prospectus are not an offer to
sell these securities and are not soliciting an offer to buy
these securities in any jurisdiction where the offer or sale is
not permitted.<BR>
</FONT></B>
</TD></TR></TABLE>

<DIV style="margin-top: 1pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="right" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">Filed
    Pursuant to Rule&#160;424(b)(5)<BR>
    File
    No.&#160;333-170455&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</FONT></B>
</DIV>
</DIV><!-- END PAGE WIDTH -->
<DIV style="width: 91%; margin-left: 4%"><!-- BEGIN PAGE WIDTH -->

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><FONT style="color: #F93F26">Subject to Completion, Dated
    November&#160;8, 2010</FONT></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><FONT style="color: #F93F26">PROSPECTUS SUPPLEMENT</FONT></B>
</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><FONT style="color: #F93F26">(To Prospectus dated
    November&#160;8, 2010)</FONT></B>
</DIV>

<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><FONT style="font-size: 12pt">4,600,000&#160;Shares</FONT></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <IMG src="b83344b8334400.gif" alt="(AMERICAN SUPERCONDUCTOR LOGO)"><B><FONT style="font-size: 12pt">
    </FONT></B>
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><FONT style="font-size: 12pt">Common Stock</FONT></B>
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><FONT style="font-size: 12pt">$&#160;&#160;&#160;&#160;&#160;
    per share</FONT></B>
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 19%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    American Superconductor Corporation is offering
    4,600,000&#160;shares of its common stock in the offering. Our
    common stock is listed on the NASDAQ Global Select Market under
    the symbol &#147;AMSC.&#148; On November&#160;5, 2010, the last
    sale price of our common stock as reported on the NASDAQ Global
    Select Market was $36.99.
</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 19%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 12pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><I>Investing in our common stock involves risks. See
    &#147;Risk Factors&#148; beginning on
    <FONT style="white-space: nowrap">page&#160;S-3</FONT>
    of this prospectus supplement.</I></B>
</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 19%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B>The Securities and Exchange Commission and state securities
    regulators have not approved or disapproved these securities, or
    determined if this prospectus is truthful or complete. Any
    representation to the contrary is a criminal offense.</B>
</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 19%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<TABLE border="0" width="100%" align="center" cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
<!-- Table Width Row BEGIN -->
<TR style="font-size: 1pt" valign="bottom">
    <TD width="69%">&nbsp;</TD>	<!-- colindex=01 type=maindata -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=02 type=gutter -->
    <TD width="12%">&nbsp;</TD>	<!-- colindex=02 type=maindata -->
    <TD width="2%">&nbsp;</TD>	<!-- colindex=03 type=gutter -->
    <TD width="16%">&nbsp;</TD>	<!-- colindex=03 type=maindata -->
</TR>
<!-- Table Width Row END -->
<!-- TableOutputHead -->
<TR style="font-size: 8pt" valign="bottom" align="center">
<TD nowrap align="center" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B>Per Share</B>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B>Total</B>
</TD>
</TR>
<TR style="line-height: 3pt; font-size: 1pt">
<TD>&nbsp;
</TD>
</TR>
<!-- TableOutputBody -->
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Public offering price
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="center" valign="bottom">
    $&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="center" valign="bottom">
    $&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Underwriting discounts and commissions
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="center" valign="bottom">
    $&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="center" valign="bottom">
    $&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Proceeds, before expenses, to us
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="center" valign="bottom">
    $&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="center" valign="bottom">
    $&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
</TR>
</TABLE>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We have granted the underwriters the right to purchase up to an
    additional 690,000&#160;shares to cover over-allotments.
</DIV>

<DIV style="margin-top: 24pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The underwriters expect to deliver the shares to purchasers on
    November&#160;&#160;&#160;, 2010.
</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 19%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

<TR>
    <TD width="33%"></TD>
    <TD width="33%"></TD>
    <TD width="33%"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">    <FONT style="font-family: 'Times New Roman', Times">MORGAN
    STANLEY
    </FONT></TD>
    <TD nowrap align="center">    <FONT style="font-family: 'Times New Roman', Times"> DEUTSCHE
    BANK SECURITIES
    </FONT></TD>
    <TD nowrap align="right">    <FONT style="font-family: 'Times New Roman', Times">
    JEFFERIES&#160;&#038; COMPANY
    </FONT></TD>
</TR>

</TABLE>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 19%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <FONT style="font-size: 9pt">PACIFIC CREST SECURITIES
    </FONT>
</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 19%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The date of this prospectus supplement is
    November&#160;&#160;&#160;, 2010
</DIV>
<!-- XBRL Pagebreak Begin -->

<P align="left" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

</DIV><!-- END PAGE WIDTH -->
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="width: 91%; margin-left: 4%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->
</DIV><!-- END PAGE WIDTH -->
<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->

<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">TABLE OF
    CONTENTS</FONT></B>
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>


<DIV align="left">
<!-- TOC -->
</DIV>

<DIV align="left">
<A name="tocpage"></A>
</DIV>

<TABLE border="0" width="100%" align="center" cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
<!-- Table Width Row BEGIN -->
<TR style="font-size: 1pt" valign="bottom">
    <TD width="87%">&nbsp;</TD>	<!-- colindex=01 type=maindata -->
    <TD width="4%">&nbsp;</TD>	<!-- colindex=02 type=gutter -->
    <TD width="4%">&nbsp;</TD>	<!-- colindex=02 type=quadleft -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=02 type=maindata -->
    <TD width="4%">&nbsp;</TD>	<!-- colindex=02 type=quadright -->
</TR>
<!-- Table Width Row END -->
<!-- TableOutputHead -->
<TR style="font-size: 8pt" valign="bottom" align="center">
<TD nowrap align="center" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B><FONT style="font-size: 10pt">Page</FONT></B>
</TD>
</TR>
<TR style="line-height: 3pt; font-size: 1pt">
<TD>&nbsp;
</TD>
</TR>
<!-- TableOutputBody -->
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <B>Prospectus Supplement</B>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
&nbsp;
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#101'>ABOUT THIS PROSPECTUS SUPPLEMENT</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    S-i
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#102'>PROSPECTUS SUPPLEMENT SUMMARY</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    S-1
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#103'>RISK FACTORS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    S-3
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#104'>FORWARD-LOOKING STATEMENTS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    S-4
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#105'>USE OF PROCEEDS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    S-5
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#106'>UNDERWRITING</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    S-6
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#107'>LEGAL MATTERS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    S-9
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#108'>EXPERTS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    S-9
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom" style="line-height: 9pt">
<TD>
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <B>Prospectus</B>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
&nbsp;
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#109'>ABOUT THIS PROSPECTUS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    1
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#110'>WHERE YOU CAN FIND MORE INFORMATION</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    2
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#111'>INCORPORATION BY REFERENCE</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    2
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#112'>FORWARD-LOOKING STATEMENTS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    3
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#113'>AMERICAN SUPERCONDUCTOR CORPORATION</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    4
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#114'>RISK FACTORS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    4
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#115'>USE OF PROCEEDS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    4
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#116'>PLAN OF DISTRIBUTION</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    5
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#117'>LEGAL MATTERS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    7
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#118'>EXPERTS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="top">
    7
</TD>
<TD>&nbsp;
</TD>
</TR>
</TABLE>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

</DIV>

<DIV align="left">
<!-- /TOC -->
</DIV>

<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>
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<P align="left" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

</DIV><!-- END PAGE WIDTH -->
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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<A name='101'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">ABOUT
    THIS PROSPECTUS SUPPLEMENT</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    On November&#160;8, 2010, we filed with the SEC a registration
    statement on
    <FONT style="white-space: nowrap">Form&#160;S-3</FONT>
    (File
    <FONT style="white-space: nowrap">No.&#160;333-170455)</FONT>
    utilizing a shelf registration process relating to the
    securities described in this prospectus supplement. The
    registration statement became effective immediately. Under this
    shelf registration process, we may, from time to time, sell
    shares of our common stock.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We are providing information to you about this offering of our
    common stock in two separate documents: (1)&#160;this prospectus
    supplement, which describes the specific details regarding this
    offering; and (2)&#160;the accompanying prospectus, which
    provides general information, some of which may not apply to
    this offering. Generally, when we refer to this
    &#147;prospectus,&#148; we are referring to both documents
    combined. If information in this prospectus supplement is
    inconsistent with the accompanying prospectus, you should rely
    on this prospectus supplement.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    You should rely only on the information contained in or
    incorporated by reference in this prospectus supplement, the
    accompanying prospectus or in any related free writing
    prospectus filed by us with the SEC. We have not authorized
    anyone to provide you with different information. This
    prospectus supplement and the accompanying prospectus do not
    constitute an offer to sell or the solicitation of an offer to
    buy any securities other than the securities described in the
    prospectus supplement or an offer to sell or the solicitation of
    an offer to buy such securities in any circumstances in which
    such offer or solicitation is unlawful. You should assume that
    the information appearing in this prospectus supplement, the
    accompanying prospectus, the documents incorporated by reference
    and any related free writing prospectus is accurate only as of
    their respective dates. Our business, financial condition,
    results of operations and prospects may have changed materially
    since those dates.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We further note that the representations, warranties and
    covenants made by us in any agreement that is filed as an
    exhibit to any document that is incorporated by reference in the
    accompanying prospectus were made solely for the benefit of the
    parties to such agreement, including, in some cases, for the
    purpose of allocating risk among the parties to such agreements,
    and should not be deemed to be a representation, warranty or
    covenant to you. Moreover, such representations, warranties or
    covenants were accurate only as of the date when made.
    Accordingly, such representations, warranties and covenants
    should not be relied on as accurately representing the current
    state of our affairs.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Unless the context otherwise indicates, references in this
    prospectus to &#147;we,&#148; &#147;our&#148; and &#147;us&#148;
    refer, collectively, to American Superconductor Corporation, a
    Delaware corporation, and its consolidated subsidiaries.
</DIV>
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    <BR>
    S-i
</DIV><!-- END PAGE WIDTH -->
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<DIV style="width: 100%; height: 9in; border-top: 1px solid #000000; padding-top: 12pt; border-right: 1px solid #000000; padding-right: 12pt; border-bottom: 1px solid #000000; padding-bottom: 12pt; border-left: 1px solid #000000; padding-left: 12pt"><!-- Begin box 1 -->

<A name='102'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">PROSPECTUS
    SUPPLEMENT SUMMARY</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <I>This summary highlights only some of the information included
    or incorporated by reference in this prospectus supplement and
    the accompanying prospectus. You should carefully read the
    entire prospectus supplement, the accompanying prospectus and
    the documents incorporated by reference, including the section
    entitled &#147;Risk Factors&#148; beginning on
    <FONT style="white-space: nowrap">page&#160;S-3</FONT>
    of this prospectus supplement, regarding our company and the
    common stock being sold in this offering.</I>
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">Our
    Company</FONT></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We are a leading power technologies company, offering an array
    of proprietary technologies and solutions spanning the electric
    power infrastructure&#160;&#151; from generation to delivery to
    end use. We are a leader in renewable energy, providing proven,
    megawatt-scale wind turbine designs and electrical control
    systems. We also offer a host of Smart Grid infrastructure
    technologies for power grid operators that enhance the
    reliability, efficiency and capacity of the grid, and integrate
    renewable energy sources into the power infrastructure. These
    include superconductor power cable systems, grid-level surge
    protectors and power electronics-based voltage stabilization
    systems.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Our company markets two primary, proprietary technologies:
    programmable power electronic converters and high temperature
    superconductor (HTS) wires. The programmability and scalability
    of our power electronic converters differentiates them from most
    competitive offerings. Our HTS wires carry more than 100 times
    the electrical current of comparably sized copper wire. The two
    primary markets we serve are the wind energy market and the
    power transmission and distribution&#160;&#151; or &#147;power
    grid&#148;&#160;&#151; market.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Our principal executive offices are located at 64 Jackson Road,
    Devens, Massachusetts 01434 and our telephone number at that
    address is
    <FONT style="white-space: nowrap">(978)&#160;842-3000.</FONT>
</DIV>
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    <BR>
    S-1
</DIV><!-- END PAGE WIDTH -->
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<DIV style="width: 100%; height: 9in; border-top: 1px solid #000000; padding-top: 12pt; border-right: 1px solid #000000; padding-right: 12pt; border-bottom: 1px solid #000000; padding-bottom: 12pt; border-left: 1px solid #000000; padding-left: 12pt"><!-- Begin box 1 -->
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<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">THE
    OFFERING</FONT></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

<TR>
    <TD width="36%"></TD>
    <TD width="1%"></TD>
    <TD width="63%"></TD>
</TR>

<TR>
    <TD valign="top">
    Common stock offered by us</TD>
    <TD></TD>
    <TD valign="bottom">
    4,600,000&#160;shares</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>

<TR>
    <TD valign="top">
<DIV style="text-indent: -5%; margin-left: 5%">
    Common stock to be outstanding after this offering</DIV>
</TD>
    <TD></TD>
    <TD valign="bottom">
    50,651,793&#160;shares</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>

<TR>
    <TD valign="top">
    Over-allotment option</TD>
    <TD></TD>
    <TD valign="bottom">
    690,000&#160;shares</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>

<TR>
    <TD valign="top">
    Net proceeds</TD>
    <TD></TD>
    <TD valign="bottom">
    We estimate that the net proceeds from this offering will be
    approximately $161.6&#160;million, assuming a public offering
    price of $36.99 per share, the last reported sale price of our
    common stock on November&#160;5, 2010, and after deducting the
    estimated underwriting discounts and commissions and offering
    expenses payable by us.</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>

<TR>
    <TD valign="top">
    Use of proceeds</TD>
    <TD></TD>
    <TD valign="bottom">
    We expect to use the net proceeds of this offering to expand our
    superconductor wire manufacturing capacity, to pursue strategic
    business relationships for the purpose of executing our growth
    and diversification strategies, including minority investments
    and acquisitions, and for other general corporate purposes. See
    &#147;Use of Proceeds.&#148;</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>

<TR>
    <TD valign="top">
    Risk Factors</TD>
    <TD></TD>
    <TD valign="bottom">
    See &#147;Risk Factors&#148; on
    <FONT style="white-space: nowrap">page&#160;S-3</FONT>
    for a discussion of factors you should consider carefully before
    deciding to invest in our common stock.</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>

<TR>
    <TD valign="top">
    Nasdaq Global Select Market symbol</TD>
    <TD></TD>
    <TD valign="bottom">
    AMSC</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Our common stock to be outstanding after this offering is based
    on 46,051,793&#160;shares outstanding as of November&#160;1,
    2010 and excludes the following as of that date:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    2,035,675&#160;shares of common stock issuable upon the exercise
    of options outstanding at a weighted average exercise price of
    $22.20 per share;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    3,559,061&#160;shares of common stock reserved for future
    issuance under our stock incentive plans;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    292,697&#160;shares of common stock reserved for future issuance
    under our stock purchase plan;&#160;and
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    5,000&#160;shares of common stock reserved for future issuance
    upon exercise of warrants.
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Except as otherwise indicated, all information in this
    prospectus supplement assumes no exercise by the underwriters of
    their over-allotment option.
</DIV>
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    <BR>
    S-2
</DIV><!-- END PAGE WIDTH -->
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->

<A name='103'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">RISK
    FACTORS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <I>Investing in our common stock involves a high degree of risk.
    Please see the risk factors under the heading &#147;Risk
    Factors&#148; in our Annual Report on
    <FONT style="white-space: nowrap">Form&#160;10-K</FONT>
    for the fiscal year ended March&#160;31, 2010, as filed with the
    SEC on May&#160;27, 2010. Before making an investment decision,
    you should carefully consider these risks as well as other
    information we include or incorporate by reference in this
    prospectus supplement and the accompanying prospectus. The risks
    and uncertainties we have described are not the only ones facing
    our company. Additional risks and uncertainties not presently
    known to us or that we currently deem to be immaterial may also
    affect our company.</I>
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">Risk
    Relating to this Offering</FONT></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 4%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><I><FONT style="font-family: 'Times New Roman', Times">We
    have Broad Discretion in the Use of the Net Proceeds from this
    Offering and may not Use Them Effectively.</FONT></I></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Our management will have broad discretion in the application of
    the net proceeds from this offering and could spend the proceeds
    in ways that do not improve our results of operations or enhance
    the value of our common stock. The failure by our management to
    apply these funds effectively could result in financial losses
    that could have a material adverse effect on our business, cause
    the price of our common stock to decline and hurt our future
    business prospects. Pending their use, we may invest our net
    proceeds from this offering in a manner that does not produce
    income or that loses value.
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 4%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><I><FONT style="font-family: 'Times New Roman', Times">You
    will Experience Immediate Dilution in the Book Value Per Share
    of the Common Stock You Purchase.</FONT></I></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Because the price per share of our common stock being offered is
    substantially higher than the book value per share of our common
    stock, you will suffer substantial dilution in the net tangible
    book value of the common stock you purchase in this offering.
    After giving effect to the sale of 4,600,000&#160;shares of
    common stock in this offering, and based on an assumed public
    offering price of $36.99 per share, the last sale price of our
    common stock on November&#160;5, 2010, as reported on the NASDAQ
    Global Select Market, and net tangible book value per share of
    our common stock of $5.87 as of September&#160;30, 2010, if you
    purchase shares in this offering, you will suffer immediate and
    substantial dilution of $28.47 per share in the net tangible
    book value of the common stock purchased.
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 4%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><I><FONT style="font-family: 'Times New Roman', Times">Future
    Sales of Additional Shares of Our Common Stock could Cause the
    Price of Our Common Stock to Decline.</FONT></I></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Sales of substantial amounts of our common stock in the public
    market following this offering, or the perception by the market
    that those sales could occur, may lower our stock price or make
    it difficult for us to raise additional equity capital in the
    future. In addition, the issuance of common stock upon exercise
    of outstanding options could be dilutive, and may cause the
    market price for a share of our common stock to decline. As of
    November&#160;1, 2010, we had 46,051,793&#160;shares of common
    stock issued and outstanding, together with outstanding options
    to purchase 2,035,675&#160;shares of common stock with a
    weighted average exercise price of $22.20 per share and
    outstanding warrants to purchase 5,000&#160;shares of common
    stock with an exercise price of $13.68 per share. In connection
    with this offering, we and each of our directors and executive
    officers have entered into
    <FONT style="white-space: nowrap">lock-up</FONT>
    agreements with the underwriters. As a result of these
    <FONT style="white-space: nowrap">lock-up</FONT>
    agreements, approximately 860,343&#160;shares are subject to a
    contractual restriction on resale through the date that is
    90&#160;days after the date of this prospectus supplement. The
    market price for shares of our common stock may decline if
    stockholders subject to the
    <FONT style="white-space: nowrap">lock-up</FONT>
    agreements sell a substantial number of shares when the
    restrictions on resale lapse, or if the underwriters waive the
    <FONT style="white-space: nowrap">lock-up</FONT>
    agreements and allow the stockholders to sell some or all of
    their shares.
</DIV>
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    <BR>
    S-3
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<A name='104'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">FORWARD-LOOKING
    STATEMENTS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    This prospectus supplement and the information incorporated by
    reference in this prospectus include &#147;forward-looking
    statements&#148; within the meaning of Section&#160;27A of the
    Securities Act of 1933, as amended, or the Securities Act, and
    Section&#160;21E of the Securities Exchange Act of 1934, as
    amended, or the Exchange Act. These statements are based on
    current expectations, estimates, forecasts and projections about
    the industry in which we operate and the beliefs and assumptions
    of our management, and as such are inherently uncertain. Words
    such as &#147;expects,&#148; &#147;anticipates,&#148;
    &#147;targets,&#148; &#147;goals,&#148; &#147;projects,&#148;
    &#147;intends,&#148; &#147;plans,&#148; &#147;believes,&#148;
    &#147;seeks,&#148; &#145;&#145;estimates,&#148;
    &#147;continues,&#148; and &#147;may&#148; and variations of
    such words and similar expressions are intended to identify such
    forward-looking statements. In addition, any statements that
    refer to projections regarding our future financial performance;
    our anticipated growth and trends in our businesses; our capital
    needs and capital expenditures; our market position and
    competitive changes in the marketplace for our products;
    potential acquisitions and divestitures; the effect of new
    accounting pronouncements and other characterizations of future
    events or circumstances are forward-looking statements. You are
    cautioned that these forward-looking statements are only
    predictions and are subject to risks, uncertainties and
    assumptions that are referenced in the section of any
    accompanying prospectus supplement entitled &#147;Risk
    Factors.&#148; These risk factors could cause actual results to
    differ materially from those indicated by forward-looking
    statements. You should also carefully review the risk factors
    and cautionary statements described in the other documents we
    file from time to time with the SEC, specifically our most
    recent Annual Report on
    <FONT style="white-space: nowrap">Form&#160;10-K,</FONT>
    our Quarterly Reports on
    <FONT style="white-space: nowrap">Form&#160;10-Q</FONT>
    and our Current Reports on
    <FONT style="white-space: nowrap">Form&#160;8-K.</FONT>
    We undertake no obligation to revise or update any
    forward-looking statements, except to the extent required by law.
</DIV>
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<P align="center" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <BR>
    S-4
</DIV><!-- END PAGE WIDTH -->
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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->

<A name='105'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">USE OF
    PROCEEDS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We estimate the net proceeds to us from this offering will be
    approximately $161.6&#160;million, or approximately
    $185.9&#160;million if the underwriters exercise their
    over-allotment option in full, based on an assumed public
    offering price of $36.99 per share, the last sale price of our
    common stock on November&#160;5, 2010, as reported on the NASDAQ
    Global Select Market, after deducting the estimated underwriting
    discounts and commissions and offering expenses payable by us.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We intend to use the net proceeds of this offering to expand our
    superconductor wire manufacturing capacity, to pursue strategic
    business relationships for the purpose of executing our growth
    and diversification strategies, including minority investments
    and acquisitions, and for other general corporate purposes.
    Pending the application of the net proceeds of this offering, we
    intend to invest the net proceeds in interest-bearing,
    investment-grade securities.
</DIV>
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<P align="center" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <BR>
    S-5
</DIV><!-- END PAGE WIDTH -->
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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->

<A name='106'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">UNDERWRITING</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Under the terms and subject to the conditions contained in an
    underwriting agreement to be dated as of the date of this
    prospectus supplement, the underwriters named below have
    severally agreed to purchase, and we have agreed to sell to
    them, severally, the number of shares of common stock indicated
    below:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE border="0" width="100%" align="center" cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent"><!-- TABLE 01 -->
<!-- Table Width Row BEGIN -->
<TR style="font-size: 1pt" valign="bottom">
    <TD width="80%">&nbsp;</TD>	<!-- colindex=01 type=maindata -->
    <TD width="2%">&nbsp;</TD>	<!-- colindex=02 type=gutter -->
    <TD width="1%" align="right">&nbsp;</TD>	<!-- colindex=02 type=lead -->
    <TD width="16%" align="right">&nbsp;</TD>	<!-- colindex=02 type=body -->
    <TD width="1%" align="left">&nbsp;</TD>	<!-- colindex=02 type=hang1 -->
</TR>
<!-- Table Width Row END -->
<!-- TableOutputHead -->
<TR style="font-size: 8pt" valign="bottom" align="center">
<TD nowrap align="left" valign="bottom">
<DIV style="border-bottom: 1px solid #000000; width: 1%; padding-bottom: 1px">
    <B><FONT style="font-size: 10pt">Name</FONT></B>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="2" nowrap align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B><FONT style="font-size: 10pt">Number of Shares</FONT></B>
</TD>
<TD>
&nbsp;
</TD>
</TR>
<TR style="line-height: 3pt; font-size: 1pt">
<TD>&nbsp;
</TD>
</TR>
<!-- TableOutputBody -->
<TR valign="bottom" style="background: #CCEEFF">
<TD align="left" valign="top">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Morgan Stanley&#160;&#038; Co. Incorporated
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="top">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Deutsche Bank Securities Inc.&#160;
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
</TR>
<TR valign="bottom" style="background: #CCEEFF">
<TD align="left" valign="top">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Jefferies&#160;&#038; Company, Inc.&#160;
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="top">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Pacific Crest Securities LLC
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
</TR>
<TR valign="bottom" style="font-size: 1pt">
<TD>
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD style="border-top: 1px solid #000000">
&nbsp;
</TD>
<TD style="border-top: 1px solid #000000">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
</TR>
<TR valign="bottom" style="background: #CCEEFF">
<TD nowrap align="left" valign="top">
<DIV style="text-indent: -10pt; margin-left: 20pt">
    Total
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    4,600,000
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
</TR>
</TABLE>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The underwriters are offering the shares of common stock subject
    to their acceptance of the shares from us and subject to prior
    sale. The underwriting agreement provides that the obligations
    of the several underwriters to pay for and accept delivery of
    the shares of our common stock offered by this prospectus
    supplement are subject to the approval of legal matters by their
    counsel and to certain other conditions. The underwriters are
    obligated to take and pay for all of the shares of common stock
    offered by this prospectus supplement if any such shares are
    taken. However, the underwriters are not required to take or pay
    for the shares covered by the underwriters&#146; over-allotment
    option described below.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The underwriters initially propose to offer part of the shares
    of common stock directly to the public at the offering price
    listed on the cover page of this prospectus supplement, and part
    to certain dealers at a price that represents a concession not
    in excess of $&#160;&#160;&#160;&#160;&#160; a share under the
    offering price. After the initial offering of the shares of
    common stock, the offering price and other selling terms may
    from time to time be varied by Morgan Stanley&#160;&#038; Co.
    Incorporated and Deutsche Bank Securities Inc.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We have granted to the underwriters an option, exercisable for
    30&#160;days from the date of this prospectus supplement, to
    purchase up to an aggregate of 690,000&#160;shares of our common
    stock at the price to public listed on the cover page of this
    prospectus supplement, less underwriting discounts and
    commissions. To the extent the option is exercised, each
    underwriter will become obligated, subject to limited
    conditions, to purchase approximately the same percentage of the
    additional shares as the number listed next to the
    underwriter&#146;s name in the preceding table bears to the
    total number of shares listed next to the names of all
    underwriters in the preceding table.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The following table summarizes the compensation and estimated
    expenses we will pay in connection with this offering:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE border="0" width="100%" align="center" cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent"><!-- TABLE 01 -->
<!-- Table Width Row BEGIN -->
<TR style="font-size: 1pt" valign="bottom">
    <TD width="44%">&nbsp;</TD>	<!-- colindex=01 type=maindata -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=02 type=gutter -->
    <TD width="6%" align="right">&nbsp;</TD>	<!-- colindex=02 type=lead -->
    <TD width="1%" align="right">&nbsp;</TD>	<!-- colindex=02 type=body -->
    <TD width="6%" align="left">&nbsp;</TD>	<!-- colindex=02 type=hang1 -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=03 type=gutter -->
    <TD width="6%" align="right">&nbsp;</TD>	<!-- colindex=03 type=lead -->
    <TD width="1%" align="right">&nbsp;</TD>	<!-- colindex=03 type=body -->
    <TD width="6%" align="left">&nbsp;</TD>	<!-- colindex=03 type=hang1 -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=04 type=gutter -->
    <TD width="6%" align="right">&nbsp;</TD>	<!-- colindex=04 type=lead -->
    <TD width="1%" align="right">&nbsp;</TD>	<!-- colindex=04 type=body -->
    <TD width="6%" align="left">&nbsp;</TD>	<!-- colindex=04 type=hang1 -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=05 type=gutter -->
    <TD width="6%" align="right">&nbsp;</TD>	<!-- colindex=05 type=lead -->
    <TD width="1%" align="right">&nbsp;</TD>	<!-- colindex=05 type=body -->
    <TD width="6%" align="left">&nbsp;</TD>	<!-- colindex=05 type=hang1 -->
</TR>
<!-- Table Width Row END -->
<!-- TableOutputHead -->
<TR style="font-size: 10pt" valign="bottom" align="center">
<TD nowrap align="center" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="7" align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B>Per Share</B>
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="7" align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B>Total</B>
</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom" align="center">
<TD nowrap align="center" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom">
    <B>Without<BR>
    </B>
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom">
    <B>With<BR>
    </B>
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom">
    <B>Without<BR>
    </B>
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom">
    <B>With<BR>
    </B>
</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom" align="center">
<TD nowrap align="center" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B><FONT style="font-size: 10pt">Over-Allotment</FONT></B>
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B><FONT style="font-size: 10pt">Over-Allotment</FONT></B>
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B><FONT style="font-size: 10pt">Over-Allotment</FONT></B>
</TD>
<TD>
&nbsp;
</TD>
<TD colspan="3" nowrap align="center" valign="bottom" style="border-bottom: 1px solid #000000">
    <B><FONT style="font-size: 10pt">Over-Allotment</FONT></B>
</TD>
</TR>
<TR style="line-height: 3pt; font-size: 1pt">
<TD>&nbsp;
</TD>
</TR>
<!-- TableOutputBody -->
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Underwriting discounts and commissions to be paid by us
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    $
</TD>
<TD nowrap align="right" valign="bottom">
    &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    $
</TD>
<TD nowrap align="right" valign="bottom">
    &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    $
</TD>
<TD nowrap align="right" valign="bottom">
    &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    $
</TD>
<TD nowrap align="right" valign="bottom">
    &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    Proceeds, before expenses, to us
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    $
</TD>
<TD nowrap align="right" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    $
</TD>
<TD nowrap align="right" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    $
</TD>
<TD nowrap align="right" valign="bottom">
&nbsp;
</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
<TD>
&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    $
</TD>
<TD nowrap align="right" valign="bottom">

</TD>
<TD nowrap align="left" valign="bottom">
&nbsp;
</TD>
</TR>
</TABLE>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We estimate that our total expenses in connection with this
    offering, excluding underwriting discounts and commissions, will
    be approximately $450,000.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Our common stock is listed on the NASDAQ Global Select Market
    under the symbol &#147;AMSC.&#148;
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We and each of our directors and executive officers have agreed
    that, without the prior written consent of Morgan
    Stanley&#160;&#038; Co. Incorporated and Deutsche Bank
    Securities Inc. on behalf of the underwriters, neither we nor
    they will, during the period ending 90&#160;days after the date
    of this prospectus supplement:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    offer, pledge, sell, contract to sell, sell any option or
    contract to purchase, purchase any option or contract to sell,
    grant any option, right or warrant to purchase, lend or
    otherwise transfer or dispose of directly or
</TD>
</TR>

</TABLE>
<!-- XBRL Paragraph Pagebreak -->
<!-- XBRL Pagebreak Begin -->

<P align="center" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <BR>
    S-6
</DIV><!-- END PAGE WIDTH -->
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="6%"></TD>
    <TD width="2%"></TD>
    <TD width="92%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>
</TD>
    <TD align="left">
    indirectly, any shares of our common stock or any securities
    convertible into or exercisable for shares of our common stock
    or exchangeable for our common stock;&#160;or
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    enter into any swap or other arrangement that transfers to
    another, in whole or in part, any of the economic consequences
    of ownership of the common stock,
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    whether any transaction described above is to be settled by
    delivery of common stock or such other securities, in cash or
    otherwise.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The restrictions described in the preceding paragraph do not
    apply to:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    the sale of shares offered pursuant to this prospectus
    supplement;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    the issuance by us of shares of common stock upon the exercise
    of an option or a warrant or the conversion of a security
    outstanding on the date of this prospectus supplement;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    the grant of options or the issuance of shares of common stock
    by us to employees, officers, directors, advisors or consultants
    pursuant to any employee benefit plan or share purchase plan;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    the sale or gift of an aggregate of 3,000&#160;shares by some of
    our directors and officers;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    transactions by any person other than us relating to shares of
    common stock or other securities acquired in open market
    transactions after the completion of the offering of the shares,
    provided that no filing under Section&#160;16(a) of the Exchange
    Act shall be required or shall be voluntarily made in connection
    with subsequent sales of common stock or other securities
    acquired in such open market transactions;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    certain transfers of shares of common stock or any security
    convertible into common stock as a bona fide gift or by will or
    pursuant to the laws of descent and distribution, provided that
    each transferee agrees to the restrictions described above and
    that no filing under Section&#160;16(a) of the Exchange Act,
    reporting a reduction in beneficial ownership of shares of our
    common stock, shall be required or shall be voluntarily made
    during the restricted period;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    transfers of shares of common stock pursuant to an existing
    written contract, instruction or plan complying with
    <FONT style="white-space: nowrap">Rule&#160;10b5-1</FONT>
    under the Exchange Act;&#160;or
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    the establishment of a trading plan pursuant to
    <FONT style="white-space: nowrap">Rule&#160;10b5-1</FONT>
    under the Exchange Act, provided that no transfers occur under
    such plan during the restricted period.
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    In order to facilitate the offering of our common stock, the
    underwriters may engage in transactions that stabilize, maintain
    or otherwise affect the price of our common stock. Specifically,
    the underwriters may sell more shares than they are obligated to
    purchase under the underwriting agreement, creating a short
    position in our common stock for their own account. A short sale
    is covered if the short position is no greater than the number
    of shares available for purchase by the underwriters under the
    over-allotment option. The underwriters can close out a covered
    short sale by exercising the option to purchase additional
    shares or purchasing shares in the open market. In determining
    the source of shares to close out a covered short sale, the
    underwriters will consider, among other things, the open market
    price of shares compared to the price available under the
    overallotment option. The underwriters may also sell shares in
    excess of the option to purchase additional shares, creating a
    naked short position. The underwriters must close out any naked
    short position by purchasing shares in the open market. A naked
    short position is more likely to be created if the underwriters
    are concerned that there may be downward pressure on the price
    of our common stock in the open market after pricing that could
    adversely affect investors who purchase in the offering. In
    addition, in order to cover any over-allotments or to stabilize
    the price of our common stock, the underwriters may bid for, and
    purchase, shares of our common stock in the open market.
    Finally, the underwriting syndicate may also reclaim selling
    concessions allowed to an underwriter or a dealer for
    distributing our common stock in the offering, if the syndicate
    repurchases previously distributed shares of our common stock to
    cover syndicate short positions or to stabilize the price of the
    common stock. Any of these activities may raise or maintain the
    market price of our common stock above independent market levels
    or prevent or retard a decline in the
</DIV>
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    <BR>
    S-7
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    market price of the common stock. The underwriters are not
    required to engage in these activities, and may end any of these
    activities at any time.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We and the underwriters have each agreed to indemnify each other
    against specified liabilities, including liabilities under the
    Securities Act.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Some of the underwriters and their respective affiliates have,
    from time to time, performed, and may in the future perform,
    various financial advisory and investment banking services for
    us for which they received or will receive customary fees and
    expenses.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    In relation to each Member State of the European Economic Area
    which has implemented the Prospectus Directive, each underwriter
    has represented and agreed that with effect from and including
    the date on which the Prospectus Directive is implemented in
    that Member State it has not made and will not make an offer of
    our shares of common stock to the public in that Member State,
    except that it may, with effect from and including such date,
    make an offer of our shares of common stock to the public in
    that Member State:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 4%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    (a)&#160;at any time to legal entities which are authorised or
    regulated to operate in the financial markets or, if not so
    authorised or regulated, whose corporate purpose is solely to
    invest in securities;
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 4%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    (b)&#160;at any time to any legal entity which has two or more
    of (1)&#160;an average of at least 250&#160;employees during the
    last financial year; (2)&#160;a total balance sheet of more than
    &#128;43,000,000 and (3)&#160;an annual net turnover of more
    than &#128;50,000,000, as shown in its last annual or
    consolidated accounts;&#160;or
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 4%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    (c)&#160;at any time in any other circumstances which do not
    require the publication by us of a prospectus pursuant to
    Article&#160;3 of the Prospectus Directive.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    For the purposes of the above, the expression an &#147;offer of
    our shares of common stock to the public&#148; in relation to
    any of our shares of common stock in any Member State means the
    communication in any form and by any means of sufficient
    information on the terms of the offer and the shares of our
    common stock to be offered so as to enable an investor to decide
    to purchase or subscribe for the shares of our common stock, as
    the same may be varied in that Member State by any measure
    implementing the Prospectus Directive in that Member State and
    the expression Prospectus Directive means Directive 2003/71/EC
    and includes any relevant implementing measure in that Member
    State.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Each underwriter has represented and agreed that it has only
    communicated or caused to be communicated and will only
    communicate or cause to be communicated an invitation or
    inducement to engage in investment activity (within the meaning
    of Section&#160;21 of the Financial Services and Markets Act
    2000)&#160;in connection with the issue or sale of our shares of
    common stock in circumstances in which Section&#160;21(1) of
    such Act does not apply to us and it has complied and will
    comply with all applicable provisions of such Act with respect
    to anything done by it in relation to any shares of our common
    stock in, from or otherwise involving the United Kingdom.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    A copy of this prospectus supplement and the accompanying
    prospectus may be made available in electronic format on the
    websites maintained by one or more of the underwriters, and one
    or more of the underwriters may distribute prospectuses
    electronically. The underwriters may agree to allocate a number
    of shares to underwriters for sale to their online brokerage
    account holders. Internet distributions will be allocated by the
    underwriters that make Internet distributions on the same basis
    as other allocations.
</DIV>
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    <BR>
    S-8
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<A name='107'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">LEGAL
    MATTERS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The validity of the shares of common stock we are offering will
    be passed upon for us by Wilmer Cutler Pickering Hale and Dorr
    LLP, Boston, Massachusetts. Ropes&#160;&#038; Gray LLP has acted
    as counsel for the underwriters in connection with certain legal
    matters related to this offering.
</DIV>

<A name='108'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">EXPERTS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The financial statements and management&#146;s assessment of the
    effectiveness of internal control over financial reporting
    (which is included in Management&#146;s Report on Internal
    Control over Financial Reporting) incorporated in this
    prospectus by reference to the Annual Report on
    <FONT style="white-space: nowrap">Form&#160;10-K</FONT>
    for the year ended March&#160;31, 2010 have been so incorporated
    in reliance on the report of PricewaterhouseCoopers LLP, an
    independent registered public accounting firm, given on the
    authority of said firm as experts in auditing and accounting.
</DIV>
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    <BR>
    S-9
</DIV><!-- END PAGE WIDTH -->
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<DIV style="width: 94%; margin-left: 3%"><!-- BEGIN PAGE WIDTH -->
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</DIV><!-- END PAGE WIDTH -->
<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B>PROSPECTUS</B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><FONT style="font-size: 18pt">AMERICAN SUPERCONDUCTOR
    CORPORATION</FONT></B>
</DIV>

<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B><FONT style="font-size: 14pt">Common Stock</FONT></B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We may issue common stock from time to time in one or more
    offerings. This prospectus describes the general manner in which
    our common stock will be offered. The prospectus supplements
    will describe the specific manner in which our common stock will
    be offered and may also supplement, update or amend information
    contained in this document. You should read this prospectus and
    any applicable prospectus supplement before you invest.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We may offer our common stock in amounts, at prices and on terms
    determined at the time of offering. The common stock may be sold
    directly to you, through agents, or through underwriters and
    dealers. If agents, underwriters or dealers are used to sell the
    common stock, we will name them and describe their compensation
    in a prospectus supplement.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Our common stock trades on the NASDAQ Global Select Market under
    the symbol &#147;AMSC.&#148;
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 18%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 5%; font-size: 12pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B>Investing in our common stock involves certain
    risks.&#160;&#160;See &#147;Risk Factors&#148; on page&#160;4 of
    this prospectus. You should carefully review the risks and
    uncertainties described under the heading &#147;Risk
    Factors&#148; included in any accompanying prospectus supplement
    and in the documents incorporated by reference in this
    prospectus for a discussion of the factors you should carefully
    consider before deciding to purchase these securities.</B>
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<CENTER style="font-size: 1pt; width: 18%; border-bottom: 1pt solid #000000"></CENTER>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <B>Neither the Securities and Exchange Commission nor any state
    securities commission has approved or disapproved of these
    securities or passed upon the adequacy or accuracy of this
    prospectus. Any representation to the contrary is a criminal
    offense.</B>
</DIV>

<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The date of this prospectus is November&#160;8, 2010.
</DIV>
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</DIV><!-- END PAGE WIDTH -->
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<DIV align="left">
<!-- TOC -->
</DIV>

<DIV align="left">
<A name="tocpage"></A>
</DIV>

<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">TABLE OF
    CONTENTS</FONT></B>
</DIV>

<DIV style="margin-top: 12pt; font-size: 1pt">&nbsp;</DIV>

<TABLE border="0" width="100%" align="center" cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
<!-- Table Width Row BEGIN -->
<TR style="font-size: 1pt" valign="bottom">
    <TD width="97%">&nbsp;</TD>	<!-- colindex=01 type=maindata -->
    <TD width="2%">&nbsp;</TD>	<!-- colindex=02 type=gutter -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=02 type=quadleft -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=02 type=maindata -->
    <TD width="1%">&nbsp;</TD>	<!-- colindex=02 type=quadright -->
</TR>
<!-- Table Width Row END -->
<!-- TableOutputHead -->
<!-- TableOutputBody -->
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#101'>ABOUT THIS PROSPECTUS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    1
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#102'>WHERE YOU CAN FIND MORE INFORMATION</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    2
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#103'>INCORPORATION BY REFERENCE</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    2
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#104'>FORWARD-LOOKING STATEMENTS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    3
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#105'>AMERICAN SUPERCONDUCTOR CORPORATION</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    4
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#106'>RISK FACTORS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    4
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#107'>USE OF PROCEEDS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    4
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#108'>PLAN OF DISTRIBUTION</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    5
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#109'>LEGAL MATTERS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    7
</TD>
<TD>&nbsp;
</TD>
</TR>
<TR valign="bottom">
<TD nowrap align="left" valign="bottom">
<DIV style="text-indent: -10pt; margin-left: 10pt">
    <A HREF='#110'>EXPERTS</A>
</DIV>
</TD>
<TD>
&nbsp;
</TD>
<TD>&nbsp;
</TD>
<TD nowrap align="right" valign="bottom">
    7
</TD>
<TD>&nbsp;
</TD>
</TR>
</TABLE>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">

</DIV>

<DIV align="left">
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<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<A name='101'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">ABOUT
    THIS PROSPECTUS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    This prospectus is part of a registration statement that we
    filed with the Securities and Exchange Commission, which we
    refer to as the SEC, utilizing a &#147;shelf&#148; registration
    process. Under this shelf registration process, we may from time
    to time sell the common stock described in this prospectus in
    one or more offerings.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    This prospectus provides you with a general description of the
    manner in which we may offer common stock by this prospectus.
    Each time we offer common stock, we will provide one or more
    prospectus supplements that will contain specific information
    about the terms of the offering. The prospectus supplement may
    also add, update or change information contained in this
    prospectus. You should read both this prospectus and the
    accompanying prospectus supplement together with the additional
    information described under the heading &#147;Where You Can Find
    More Information&#148; beginning on page&#160;2 of this
    prospectus.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    You should rely only on the information contained in or
    incorporated by reference in this prospectus, any accompanying
    prospectus supplement or in any related free writing prospectus
    filed by us with the SEC. We have not authorized anyone to
    provide you with different information. This prospectus and the
    accompanying prospectus supplement do not constitute an offer to
    sell or the solicitation of an offer to buy any securities other
    than the securities described in the accompanying prospectus
    supplement or an offer to sell or the solicitation of an offer
    to buy such securities in any circumstances in which such offer
    or solicitation is unlawful. You should assume that the
    information appearing in this prospectus, any prospectus
    supplement, the documents incorporated by reference and any
    related free writing prospectus is accurate only as of their
    respective dates. Our business, financial condition, results of
    operations and prospects may have changed materially since those
    dates.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Unless the context otherwise indicates, references in this
    prospectus to &#147;we,&#148; &#147;our&#148; and &#147;us&#148;
    refer, collectively, to American Superconductor Corporation, a
    Delaware corporation, and its consolidated subsidiaries.
</DIV>
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    <BR>
    -1-
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->

<A name='102'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">WHERE YOU
    CAN FIND MORE INFORMATION</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We file annual, quarterly and current reports, proxy statements
    and other information with the SEC. Our SEC filings are
    available to the public over the Internet at the SEC&#146;s
    website at
    <FONT style="white-space: nowrap">http://www.sec.gov.</FONT>
    Copies of certain information filed by us with the SEC are also
    available on our website at
    <FONT style="white-space: nowrap">http://www.amsc.com.</FONT>
    Our website is not a part of this prospectus. You may also read
    and copy any document we file at the SEC&#146;s public reference
    room, 100&#160;F&#160;Street, N.E., Washington,&#160;D.C. 20549.
    Please call the SEC at
    <FONT style="white-space: nowrap">1-800-SEC-0330</FONT>
    for further information on the operation of the public reference
    room.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    This prospectus is part of a registration statement we filed
    with the SEC. This prospectus omits some information contained
    in the registration statement in accordance with SEC rules and
    regulations. You should review the information and exhibits in
    the registration statement for further information on us and our
    consolidated subsidiaries and the securities we are offering.
    Statements in this prospectus concerning any document we filed
    as an exhibit to the registration statement or that we otherwise
    filed with the SEC are not intended to be comprehensive and are
    qualified by reference to these filings. You should review the
    complete document to evaluate these statements.
</DIV>

<A name='103'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">INCORPORATION
    BY REFERENCE</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The SEC allows us to incorporate by reference much of the
    information we file with the SEC, which means that we can
    disclose important information to you by referring you to those
    publicly available documents. The information that we
    incorporate by reference in this prospectus is considered to be
    part of this prospectus. Because we are incorporating by
    reference future filings with the SEC, this prospectus is
    continually updated and those future filings may modify or
    supersede some of the information included or incorporated in
    this prospectus. This means that you must look at all of the SEC
    filings that we incorporate by reference to determine if any of
    the statements in this prospectus or in any document previously
    incorporated by reference have been modified or superseded. This
    prospectus incorporates by reference the documents listed below
    (File
    <FONT style="white-space: nowrap">No.&#160;000-19672)</FONT>
    and any future filings we make with the SEC under
    Sections&#160;13(a), 13(c), 14 or 15(d) of the Securities
    Exchange Act of 1934, as amended, or the Exchange Act (in each
    case, other than those documents or the portions of those
    documents not deemed to be filed) until the offering of the
    common stock under the registration statement is terminated or
    completed:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    Annual Report on
    <FONT style="white-space: nowrap">Form&#160;10-K</FONT>
    for the fiscal year ended March&#160;31, 2010, including the
    information specifically incorporated by reference into the
    Annual Report on
    <FONT style="white-space: nowrap">Form&#160;10-K</FONT>
    from our definitive proxy statement for the 2010 Annual Meeting
    of Stockholders;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    Quarterly Reports on
    <FONT style="white-space: nowrap">Form&#160;10-Q</FONT>
    for the fiscal quarters ended June&#160;30, 2010 and
    September&#160;30, 2010;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    Current Reports on
    <FONT style="white-space: nowrap">Form&#160;8-K</FONT>
    filed May&#160;14, 2010, May&#160;17, 2010, August&#160;6, 2010,
    September&#160;15, 2010&#160;and November&#160;8, 2010; and
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    The description of our common stock contained in our
    Registration Statement on
    <FONT style="white-space: nowrap">Form&#160;8-A</FONT>
    filed on November&#160;5, 1991, as updated by the Current Report
    on
    <FONT style="white-space: nowrap">Form&#160;8-K</FONT>
    filed November&#160;8, 2010 and any other amendments or reports
    filed for the purpose of updating such description.
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    You may request a copy of these filings, at no cost, by writing
    or telephoning us at the following address:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    American Superconductor Corporation
</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    64 Jackson Road, Devens, MA 01434
</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Telephone:
    <FONT style="white-space: nowrap">(978)&#160;842-3000</FONT>
</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Attn: Investor Relations
</DIV>
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    <BR>
    -2-
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<P><HR noshade><P>
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<A name='104'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">FORWARD-LOOKING
    STATEMENTS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    This prospectus and the information incorporated by reference in
    this prospectus include &#147;forward&#160;&#151; looking
    statements&#148; within the meaning of Section&#160;27A of the
    Securities Act of 1933, as amended, or the Securities Act, and
    Section&#160;21E of the Securities Exchange Act of 1934, as
    amended, or the Exchange Act. These statements are based on
    current expectations, estimates, forecasts and projections about
    the industry in which we operate and the beliefs and assumptions
    of our management, and as such are inherently uncertain. Words
    such as &#147;expects,&#148; &#147;anticipates,&#148;
    &#147;targets,&#148; &#147;goals,&#148; &#147;projects,&#148;
    &#147;intends,&#148; &#147;plans,&#148; &#147;believes,&#148;
    &#147;seeks,&#148; &#147;estimates,&#148; &#147;continues,&#148;
    and &#147;may&#148; and variations of such words and similar
    expressions are intended to identify such forward-looking
    statements. In addition, any statements that refer to
    projections regarding our future financial performance; our
    anticipated growth and trends in our businesses; our capital
    needs and capital expenditures; our market position and
    competitive changes in the marketplace for our products;
    potential acquisitions and divestitures; the effect of new
    accounting pronouncements and other characterizations of future
    events or circumstances are forward-looking statements. You are
    cautioned that these forward-looking statements are only
    predictions and are subject to risks, uncertainties and
    assumptions that are referenced in the section of any
    accompanying prospectus supplement entitled &#147;Risk
    Factors.&#148; These risk factors could cause actual results to
    differ materially from those indicated by forward-looking
    statements. You should also carefully review the risk factors
    and cautionary statements described in the other documents we
    file from time to time with the SEC, specifically our most
    recent Annual Report on
    <FONT style="white-space: nowrap">Form&#160;10-K,</FONT>
    our Quarterly Reports on
    <FONT style="white-space: nowrap">Form&#160;10-Q</FONT>
    and our Current Reports on
    <FONT style="white-space: nowrap">Form&#160;8-K.</FONT>
    We undertake no obligation to revise or update any
    forward-looking statements, except to the extent required by law.
</DIV>
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    <BR>
    -3-
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<A name='105'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">AMERICAN
    SUPERCONDUCTOR CORPORATION</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We are a leading power technologies company, offering an array
    of proprietary technologies and solutions spanning the electric
    power infrastructure&#160;&#151; from generation to delivery to
    end use. We are a leader in renewable energy, providing proven,
    megawatt-scale wind turbine designs and electrical control
    systems. We also offer a host of Smart Grid infrastructure
    technologies for power grid operators that enhance the
    reliability, efficiency and capacity of the grid, and integrate
    renewable energy sources into the power infrastructure. These
    include superconductor power cable systems, grid-level surge
    protectors and power electronics-based voltage stabilization
    systems.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Our company markets two primary, proprietary technologies:
    programmable power electronic converters and high temperature
    superconductor (HTS) wires. The programmability and scalability
    of our power electronic converters differentiates them from most
    competitive offerings. Our HTS wires carry more than 100 times
    the electrical current of comparably sized copper wire. The two
    primary markets we serve are the wind energy market and the
    power transmission and distribution&#160;&#151; or &#147;power
    grid&#148;&#160;&#151; market.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Our principal executive offices are located at 64 Jackson Road,
    Devens, Massachusetts 01434 and our telephone number at that
    address is
    <FONT style="white-space: nowrap">(978)&#160;842-3000.</FONT>
</DIV>

<A name='106'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">RISK
    FACTORS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Investing in our common stock involves a high degree of risk.
    You should carefully consider the specific risks discussed or
    incorporated by reference in the accompanying prospectus
    supplement, together with all the other information contained in
    the prospectus supplement or incorporated by reference in this
    prospectus. You should also consider the risks and uncertainties
    discussed under the caption &#147;Risk Factors&#148; included in
    our most recent Annual Report
    <FONT style="white-space: nowrap">Form&#160;10-K,</FONT>
    which are incorporated by reference in this prospectus, and
    which may be amended, supplemented or superseded from time to
    time by other reports we file with the SEC in the future.
</DIV>

<A name='107'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">USE OF
    PROCEEDS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We intend to use the net proceeds from the sale of any common
    stock offered under this prospectus for general corporate
    purposes unless otherwise indicated in the applicable prospectus
    supplement. General corporate purposes may include the
    acquisition of companies or businesses, repayment and
    refinancing of debt, working capital and capital expenditures.
    We may temporarily invest the net proceeds in investment-grade,
    interest-bearing securities until they are used for their stated
    purpose. We have not determined the amount of net proceeds to be
    used specifically for such purposes. As a result, management
    will retain broad discretion over the allocation of net proceeds.
</DIV>
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    <BR>
    -4-
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<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<A name='108'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">PLAN OF
    DISTRIBUTION</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We may sell our common stock:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    through underwriters;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    through dealers;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    through agents;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    directly to purchasers; or
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    through a combination of any of these methods of sale.
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    In addition, we may issue our common stock as a dividend or
    distribution or in a subscription rights offering to our
    existing security holders.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    We may directly solicit offers to purchase our common stock, or
    agents may be designated to solicit such offers. We will, in the
    prospectus supplement relating to such offering, name any agent
    that could be viewed as an underwriter under the Securities Act
    and describe any commissions that we must pay. Any such agent
    will be acting on a best efforts basis for the period of its
    appointment or, if indicated in the applicable prospectus
    supplement, on a firm commitment basis. This prospectus may be
    used in connection with any offering of our common stock through
    any of these methods or other methods described in the
    applicable prospectus supplement.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The distribution of the common stock may be effected from time
    to time in one or more transactions:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    at a fixed price, or prices, which may be changed from time to
    time;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    at market prices prevailing at the time of sale;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    at prices related to such prevailing market prices; or
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    at negotiated prices.
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Each prospectus supplement will describe the method of
    distribution of the common stock and any applicable
    restrictions. The prospectus supplement will also describe the
    terms of the offering of our common stock, including the
    following:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    the name of the agent or any underwriters;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    the public offering or purchase price;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    any discounts and commissions to be allowed or paid to the agent
    or underwriters;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    all other items constituting underwriting compensation;
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    any discounts and commissions to be allowed or paid to dealers;
    and
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    any exchanges on which the common stock will be listed.
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    If any underwriters or agents are utilized in the sale of the
    common stock, we will enter into an underwriting agreement or
    other agreement with them at the time of sale to them, and we
    will set forth in the prospectus supplement relating to such
    offering the names of the underwriters or agents and the terms
    of the related agreement with them.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    If a dealer is utilized in the sale of the common stock, we will
    sell such securities to the dealer, as principal. The dealer may
    then resell such common stock to the public at varying prices to
    be determined by such dealer at the time of resale.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    If we offer common stock in a subscription rights offering to
    our existing security holders, we may enter into a standby
    underwriting agreement with dealers, acting as standby
    underwriters. We may pay the standby underwriters a commitment
    fee for the common stock they commit to purchase on a standby
    basis. If we do
</DIV>
<!-- XBRL Paragraph Pagebreak -->
<!-- XBRL Pagebreak Begin -->

<P align="center" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <BR>
    -5-
</DIV><!-- END PAGE WIDTH -->
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 0%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    not enter into a standby underwriting arrangement, we may retain
    a dealer-manager to manage a subscription rights offering for us.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Agents, underwriters, dealers and other persons may be entitled
    under agreements which they may enter into with us to
    indemnification by us against certain civil liabilities,
    including liabilities under the Securities Act, and may be
    customers of, engage in transactions with or perform services
    for us in the ordinary course of business.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    If so indicated in the applicable prospectus supplement, we will
    authorize underwriters or other persons acting as our agents to
    solicit offers by certain institutions to purchase common stock
    from us pursuant to delayed delivery contracts providing for
    payment and delivery on the date stated in the prospectus
    supplement. Each contract will be for an amount not less than,
    and the aggregate amount of common stock sold pursuant to such
    contracts shall not be less nor more than, the respective
    amounts stated in the prospectus supplement. Institutions with
    whom the contracts, when authorized, may be made include
    commercial and savings banks, insurance companies, pension
    funds, investment companies, educational and charitable
    institutions and other institutions, but shall in all cases be
    subject to our approval. Delayed delivery contracts will not be
    subject to any conditions except that:
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="4%"></TD>
    <TD width="2%"></TD>
    <TD width="94%"></TD>
</TR>

<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    the purchase by an institution of the common stock covered under
    that contract shall not at the time of delivery be prohibited
    under the laws of the jurisdiction to which that institution is
    subject;&#160;and
</TD>
</TR>


<TR style="line-height: 6pt; font-size: 1pt"><TD>&nbsp;</TD></TR>


<TR valign="top" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <TD>&nbsp;</TD>
    <TD>    &#149;&#160;
</TD>
    <TD align="left">
    if the common stock are also being sold to underwriters acting
    as principals for their own account, the underwriters shall have
    purchased such securities not sold for delayed delivery. The
    underwriters and other persons acting as our agents will not
    have any responsibility in respect of the validity or
    performance of delayed delivery contracts.
</TD>
</TR>

</TABLE>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Certain agents, underwriters and dealers, and their associates
    and affiliates may be customers of, have borrowing relationships
    with, engage in other transactions with,
    <FONT style="white-space: nowrap">and/or</FONT>
    perform services, including investment banking services, for us
    or one or more of our respective affiliates in the ordinary
    course of business.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    In order to facilitate the offering of the common stock, any
    underwriters may engage in transactions that stabilize, maintain
    or otherwise affect the price of the common stock or any other
    securities the prices of which may be used to determine payments
    on such common stock. Specifically, any underwriters may
    overallot in connection with the offering, creating a short
    position for their own accounts. In addition, to cover
    overallotments or to stabilize the price of the common stock or
    of any such other securities, the underwriters may bid for, and
    purchase, the common stock or any such other securities in the
    open market. Finally, in any offering of the common stock
    through a syndicate of underwriters, the underwriting syndicate
    may reclaim selling concessions allowed to an underwriter or a
    dealer for distributing the common stock in the offering if the
    syndicate repurchases previously distributed common stock in
    transactions to cover syndicate short positions, in
    stabilization transactions or otherwise. Any of these activities
    may stabilize or maintain the market price of the common stock
    above independent market levels. Any such underwriters are not
    required to engage in these activities and may end any of these
    activities at any time.
</DIV>

<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Under
    <FONT style="white-space: nowrap">Rule&#160;15c6-1</FONT>
    of the Exchange Act, trades in the secondary market generally
    are required to settle in three business days, unless the
    parties to any such trade expressly agree otherwise. The
    applicable prospectus supplement may provide that the original
    issue date for your common stock may be more than three
    scheduled business days after the trade date for your common
    stock. Accordingly, in such a case, if you wish to trade common
    stock on any date prior to the third business day before the
    original issue date for your common stock, you will be required,
    by virtue of the fact that your common stock initially are
    expected to settle in more than three scheduled business days
    after the trade date for your common stock, to make alternative
    settlement arrangements to prevent a failed settlement.
</DIV>
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<P align="center" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <BR>
    -6-
</DIV><!-- END PAGE WIDTH -->
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
<!-- XBRL Pagebreak End -->

<A name='109'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">LEGAL
    MATTERS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    Unless the applicable prospectus supplement indicates otherwise,
    the validity of the common stock in respect of which this
    prospectus is being delivered will be passed upon by Wilmer
    Cutler Pickering Hale and Dorr LLP.
</DIV>

<A name='110'>
<DIV style="margin-top: 18pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="center" style="margin-left: 0%; margin-right: 0%; font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: transparent">

    <B><FONT style="font-family: 'Times New Roman', Times">EXPERTS</FONT></B>
</DIV>
</A>
<DIV style="margin-top: 6pt; font-size: 1pt">&nbsp;</DIV>

<DIV align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    The financial statements and management&#146;s assessment of the
    effectiveness of internal control over financial reporting
    (which is included in Management&#146;s Report on Internal
    Control over Financial Reporting) incorporated in this
    prospectus by reference to the Annual Report on
    <FONT style="white-space: nowrap">Form&#160;10-K</FONT>
    for the year ended March&#160;31, 2010 have been so incorporated
    in reliance on the report of PricewaterhouseCoopers LLP, an
    independent registered public accounting firm, given on the
    authority of said firm as experts in auditing and accounting.
</DIV>
<!-- XBRL Pagebreak Begin -->

<P align="center" style="font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: transparent">
    <BR>
    -7-
</DIV><!-- END PAGE WIDTH -->
<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#tocpage">Table of Contents</A></H5><P>

<DIV style="width: 87%; margin-left: 6%"><!-- BEGIN PAGE WIDTH -->
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<DIV style="margin-top: 3pt; font-size: 1pt">&nbsp;</DIV>
<!-- XBRL Pagebreak Begin -->

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`
end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
