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                                                      REGISTRATION NO. 333-48545
    
================================================================================
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
   
                                AMENDMENT NO. 1
    
   
                                       TO
    
 
                                    FORM S-3
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                            ------------------------
 
                      AMERICAN SUPERCONDUCTOR CORPORATION
             (Exact name of registrant as specified in its charter)
 
                                                                
             DELAWARE                                                             04-2959321
 (State of other jurisdiction of                                               (I.R.S. employer
  incorporation or organization)                                             identification No.)
TWO TECHNOLOGY DRIVE WESTBOROUGH, MASSACHUSETTS 01581 (508) 836-4200 (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) ------------------------ GREGORY J. YUREK CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER AMERICAN SUPERCONDUCTOR CORPORATION Two Technology Drive Westborough, Massachusetts 01581 (508) 836-4200 (Name, address, including zip code, and telephone number, including area code, of agent for service) COPY OF COMMUNICATIONS TO: PATRICK J. RONDEAU, ESQ. WINTHROP B. CONRAD, JR., ESQ. HALE AND DORR LLP DAVIS POLK & WARDWELL 60 State Street 450 Lexington Avenue Boston, Massachusetts 02109 New York, New York 10017 (617) 526-6000 (212) 450-4000
------------------------ Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this Registration Statement. If the only securities being registered on this form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. [ ] If any of the securities being registered on this form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. [ ] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. [ ] If delivery of the Prospectus is expected to be made pursuant to Rule 434, please check the following box. [ ] THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A), MAY DETERMINE. ================================================================================ 2 EXPLANATORY NOTE This Amendment No. 1 to the Registration Statement on Form S-3 (Filed No. 333-48545) of American Superconductor Corporation (the "Company") is filed solely for the purpose of filing with the Commission copies of the Exhibits listed in Item 16 Part of II hereto and to make corresponding changes to Item 16. 3 PART II INFORMATION NOT REQUIRED IN PROSPECTUS ITEM 16. EXHIBITS. 1.1 -- Form of Underwriting Agreement 4.1(1) -- Restated Certificate of Incorporation of the Company 4.2(2) -- By-laws of the Company, as amended to date 5.1 -- Opinion of Hale and Dorr LLP *23.1 -- Consent of Coopers & Lybrand L.L.P. *23.2 -- Consent of Ernst & Young LLP *23.3 -- Consent of Smith & Gesteland, LLP 23.4 -- Consent of Hale and Dorr LLP (included in Exhibit 5.1) *24.1 -- Power of Attorney
- --------------- * Previously filed. (1) Incorporated by reference to Exhibits to the Registrant's Annual Report on Form 10-K, filed with the Commission on June 29, 1992. (2) Incorporated by reference to Exhibits to the Registrant's Registration Statement on Form S-1 (File No. 33-43647). II-1 4 SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Amendment No. 1 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Westborough, Commonwealth of Massachusetts, on the 13th day of April, 1998. AMERICAN SUPERCONDUCTOR CORPORATION By: /s/ GREGORY J. YUREK ------------------------------------ GREGORY J. YUREK CHAIRMAN OF THE BOARD, PRESIDENT AND CHIEF EXECUTIVE OFFICER Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities indicated as of the 13th day of April, 1998.
SIGNATURE TITLE --------- ----- /s/ GREGORY J. YUREK Chairman of the Board, President and Chief - --------------------------------------------------- Executive Officer (principal executive officer) GREGORY J. YUREK * Vice President, Corporate Development and - --------------------------------------------------- Finance, Chief Financial Officer, Treasurer and STANLEY PIEKOS Secretary (principal financial and accounting officer) * Director - --------------------------------------------------- ALBERT J. BACIOCCO, JR. * Director - --------------------------------------------------- FRANK BORMAN * Director - --------------------------------------------------- PETER O. CRISP * Director - --------------------------------------------------- RICHARD DROUIN * Director - --------------------------------------------------- GERARD MENJON * Director - --------------------------------------------------- ANDREW G.C. SAGE, II * Director - --------------------------------------------------- JOHN B. VANDER SANDE
*By: /s/ GREGORY J. YUREK ------------------------------ GREGORY J. YUREK ATTORNEY-IN-FACT II-2
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                                3,500,000 SHARES


                       AMERICAN SUPERCONDUCTOR CORPORATION

                     COMMON STOCK, PAR VALUE $.01 PER SHARE







                             UNDERWRITING AGREEMENT




April ___, 1998
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                                                      April ___, 1998




Morgan Stanley & Co. Incorporated
NationsBanc Montgomery Securities LLC
c/o Morgan Stanley & Co. Incorporated
1585 Broadway
New York, New York 10036

Dear Sirs and Mesdames:

      American Superconductor Corporation, a Delaware corporation (the
"COMPANY"), proposes to issue and sell to the several Underwriters named in
Schedule II hereto (the "UNDERWRITERS"), and certain shareholders of the Company
(the "SELLING SHAREHOLDERS") named in Schedule I hereto severally propose to
sell to the several Underwriters, an aggregate of 3,500,000 shares of the Common
Stock, par value $.01 per share, of the Company (the "FIRM SHARES"), of which
3,029,121 shares are to be issued and sold by the Company and 470,879 shares are
to be sold by the Selling Shareholders, each Selling Shareholder selling the
amount set forth opposite such Selling Shareholder's name in Schedule I hereto.

   
      The Company also proposes to issue and sell to the several Underwriters
not more than an additional 525,000 shares of its Common Stock, par value $.01
per share (the "ADDITIONAL SHARES"), if and to the extent that you, on behalf of
the Underwriters, shall have determined to exercise, on behalf of the
Underwriters, the right to purchase such shares of common stock granted to the
Underwriters in Section 3 hereof. The Firm Shares and the Additional Shares are
hereinafter collectively referred to as the "SHARES." The shares of Common
Stock, par value $.01 per share, of the Company to be outstanding after giving
effect to the sales contemplated hereby are hereinafter referred to as the
"COMMON STOCK." The Company and the Selling Shareholders are hereinafter
sometimes collectively referred to as the "SELLERS."
    

      The Company has filed with the Securities and Exchange Commission (the
"COMMISSION") a registration statement, including a prospectus, relating to the
Shares. The registration statement as amended at the time it becomes effective,
including the documents incorporated by reference therein and the information
(if any) deemed to be part of the registration statement at the time of
effectiveness pursuant to Rule 430A under the Securities Act of 1933, as 
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amended (the "SECURITIES ACT"), is hereinafter referred to as the "REGISTRATION
STATEMENT"; the prospectus in the form first used to confirm sales of Shares,
including the documents incorporated by reference therein, is hereinafter
referred to as the "PROSPECTUS." If the Company has filed an abbreviated
registration statement to register additional shares of Common Stock pursuant to
Rule 462(b) under the Securities Act (the "RULE 462 REGISTRATION STATEMENT"),
then any reference herein to the term "REGISTRATION STATEMENT" shall be deemed
to include such Rule 462 Registration Statement.

      1.    Representations and Warranties of the Company. The Company
represents and warrants to and agrees with each of the Underwriters that:

            (a)    The Registration Statement has become effective; no stop
      order suspending the effectiveness of the Registration Statement is in
      effect, and no proceedings for such purpose are pending before or, to the
      Company's knowledge, threatened by the Commission.

            (b)   (i) Each document, if any, filed or to be filed pursuant to
      the Securities Exchange Act of 1934, as amended (the "EXCHANGE ACT"), and
      incorporated by reference in the Prospectus complied or will comply when
      so filed in all material respects with the Exchange Act and the applicable
      rules and regulations of the Commission thereunder, the Registration
      Statement, when it became effective, did not contain and, as amended or
      supplemented, if applicable, will not contain any untrue statement of a
      material fact or omit to state a material fact required to be stated
      therein or necessary to make the statements therein not misleading, the
      Registration Statement and the Prospectus comply and, as amended or
      supplemented, if applicable, will comply in all material respects with the
      Securities Act and the applicable rules and regulations of the Commission
      thereunder and the Prospectus does not contain and, as amended or
      supplemented, if applicable, will not contain any untrue statement of a
      material fact or omit to state a material fact necessary to make the
      statements therein, in the light of the circumstances under which they
      were made, not misleading, except that the representations and warranties
      set forth in this paragraph do not apply to statements or omissions in the
      Registration Statement or the Prospectus based upon information relating
      to any Underwriter furnished to the Company in writing by such Underwriter
      through you expressly for use therein.

            (c)   The Company has been duly incorporated, is validly existing as
      a corporation in good standing under the laws of the jurisdiction of its
      incorporation, has the corporate power and authority to own its property
      and to conduct its business as described in the 


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      Prospectus and is duly qualified to transact business and is in good
      standing in each jurisdiction in which the conduct of its business or its
      ownership or leasing of property requires such qualification, except to
      the extent that the failure to be so qualified or be in good standing
      would not have a material adverse effect on the Company and its
      subsidiaries, taken as a whole. 

            (d)   Each subsidiary of the Company has been duly incorporated, is
      validly existing as a corporation in good standing under the laws of the
      jurisdiction of its incorporation, has the corporate power and authority
      to own its property and to conduct its business as described in the
      Prospectus and is duly qualified to transact business and is in good
      standing in each jurisdiction in which the conduct of its business or its
      ownership or leasing of property requires such qualification, except to
      the extent that the failure to be so qualified or be in good standing
      would not have a material adverse effect on the Company and its
      subsidiaries, taken as a whole; all of the issued shares of capital stock
      of each subsidiary of the Company have been duly and validly authorized
      and issued, are fully paid and non-assessable and are owned directly by
      the Company or another subsidiary, free and clear of all liens,
      encumbrances, equities or claims.

            (e)   This Agreement has been duly authorized, executed and
      delivered by the Company.

            (f)   The authorized capital stock of the Company conforms as to
      legal matters to the description thereof contained in the Prospectus.

            (g)   The shares of Common Stock (including the Shares to be sold by
      the Selling Shareholders) outstanding prior to the issuance of the Shares
      to be sold by the Company have been duly authorized and are validly
      issued, fully paid and non-assessable.

            (h)   The Shares to be sold by the Company have been duly authorized
      and, when issued and delivered in accordance with the terms of this
      Agreement, will be validly issued, fully paid and non-assessable, and the
      issuance of such Shares will not be subject to any preemptive or similar
      rights.

            (i)   The execution and delivery by the Company of, and the
      performance by the Company of its obligations under, this Agreement will
      not contravene any provision of applicable law or the certificate of
      incorporation or by-laws of the Company or any agreement or other
      instrument binding upon the Company or any of its subsidiaries that is


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      material to the Company and its subsidiaries, taken as a whole, or any
      judgment, order or decree of any governmental body, agency or court having
      jurisdiction over the Company or any subsidiary, and no consent, approval,
      authorization or order of, or qualification with, any governmental body or
      agency is required for the performance by the Company of its obligations
      under this Agreement, except for the effectiveness of the Registration
      Statement and such as may be required by the securities or Blue Sky laws
      of the various states in connection with the offer and sale of the Shares.

            (j)   There has not occurred any material adverse change, or any
      development involving a prospective material adverse change, in the
      condition, financial or otherwise, or in the earnings, business or
      operations of the Company and its subsidiaries, taken as a whole, from
      that set forth in the Prospectus (exclusive of any amendments or
      supplements thereto subsequent to the date of this Agreement).

            (k)   There are no legal or governmental proceedings pending or
      threatened to which the Company or any of its subsidiaries is a party or
      to which any of the properties of the Company or any of its subsidiaries
      is subject that are required to be described in the Registration Statement
      or the Prospectus and are not so described or any statutes, regulations,
      contracts or other documents that are required to be described in the
      Registration Statement or the Prospectus or to be filed as exhibits to the
      Registration Statement that are not described or filed as required.

            (l)   Each preliminary prospectus filed as part of the registration
      statement as originally filed or as part of any amendment thereto, or
      filed pursuant to Rule 424 under the Securities Act, complied when so
      filed in all material respects with the Securities Act and the applicable
      rules and regulations of the Commission thereunder.

            (m)   The Company is not and, after giving effect to the offering
      and sale of the Shares and the application of the proceeds thereof as
      described in the Prospectus, will not be an "investment company" as such
      term is defined in the Investment Company Act of 1940, as amended.

            (n)   The Company and its subsidiaries are in compliance with any
      and all applicable foreign, federal, state and local laws and regulations
      relating to the protection of human health and safety, the environment or
      hazardous or toxic substances or wastes, pollutants or contaminants
      ("ENVIRONMENTAL LAWS"), have received all permits, licenses or other
      approvals required of them under applicable 


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      Environmental Laws to conduct their respective businesses and are in
      compliance with all terms and conditions of any such permit, license or
      approval, except where such noncompliance with Environmental Laws, failure
      to receive required permits, licenses or other approvals or failure to
      comply with the terms and conditions of such permits, licenses or
      approvals would not, singly or in the aggregate, have a material adverse
      effect on the Company and its subsidiaries, taken as a whole.

            (o)   The Company has incurred no costs or liabilities associated
      with Environmental Laws (including, without limitation, any capital or
      operating expenditures required for clean-up, closure of properties or
      compliance with Environmental Laws or any permit, license or approval, any
      related constraints on operating activities and any potential liabilities
      to third parties) which would, singly or in the aggregate, have a material
      adverse effect on the Company and its subsidiaries, taken as a whole.

            (p)   There are no contracts, agreements or understandings between
      the Company and any person granting such person the right to require the
      Company to file a registration statement under the Securities Act with
      respect to any securities of the Company or to require the Company to
      include such securities with the Shares registered pursuant to the
      Registration Statement, except for the rights of CHARTH, a subsidiary of
      Electricite de France, which have been duly waived, "piggyback"
      registration rights of Invemed Associates, Inc. and Cristina Kepner with
      respect to shares of Common Stock issuable upon the exercise of warrants
      held by them (which warrants are not yet exercisable), which have been
      duly waived, "demand" registration rights of the Electric Power Research
      Institute with respect to shares of Common Stock issuable upon the
      exercise of a warrant held by it (which warrant has not yet been
      exercised) and (iv) "demand" registration rights of various persons and
      entities with respect to Common Stock received pursuant to the Company's
      acquisition of Superconductivity, Inc. in April 1997.

            (q)   The accountants who have expressed their opinions with respect
      to certain of the financial statements and schedules included or
      incorporated by reference in the Registration Statement are independent
      public accountants as required by the Securities Act.

            (r)   The consolidated financial statements and schedules of the
      Company included or incorporated by reference in the Registration
      Statement present fairly the consolidated financial position of the


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      Company as of the respective dates of such financial statements, and the
      consolidated results of operations and cash flows of the Company for the
      respective periods covered thereby, all in conformity with generally
      accepted accounting principles consistently applied throughout the periods
      involved, except as disclosed in the Prospectus. The financial information
      set forth in the Prospectus under "Selected Consolidated Financial Data"
      presents fairly, on the basis stated in the Prospectus, the information
      set forth therein.

            (s)   Neither the Company nor any of its subsidiaries is in
      violation of its respective charter or by-laws or in default under any
      consent decree, or in default with respect to any material provision of
      any lease, loan agreement, franchise, license, permit or other contract
      obligation to which it is a party or by which it may be bound, or to which
      any of the property or assets of the Company or such subsidiary is
      subject, and there does not exist any state of facts which constitutes an
      event of default as defined in such documents or which, with notice or
      lapse of time or both, would constitute such an event of default, in each
      case except for violations or defaults which neither singly nor in the
      aggregate are material to the condition, financial or otherwise, or the
      results of operations, business affairs or business prospects of the
      Company and its subsidiaries, taken as a whole.

            (t)   The Company and its subsidiaries have good and marketable
      title to all the properties and assets reflected as owned in the financial
      statements hereinabove described (or elsewhere in the Prospectus), subject
      to no lien, mortgage, pledge, charge or encumbrance of any kind except
      those, if any, reflected in such financial statements (or elsewhere in the
      Prospectus) or which are not material to the Company and its subsidiaries,
      taken as a whole. The Company and each of its subsidiaries holds its
      leased properties under valid and binding leases.

            (u)   The status of the Company's and its subsidiaries' patents,
      patent rights, trademarks, copyrights, inventions, know-how (including
      trade secrets and other unpatented and/or unpatentable proprietary or
      confidential information, systems or procedures) and other proprietary
      rights (collectively, the "TRADE RIGHTS"), whether owned by the Company or
      such subsidiary or obtained by the Company or such subsidiary through
      license or otherwise, is as described in the Prospectus. Except as
      described in the Prospectus, neither the Company 


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      nor any of its subsidiaries has received any notice of infringement,
      misappropriation or conflict from any third party as to any Trade Rights
      which has not been resolved or disposed of, and neither the Company nor
      any of its subsidiaries has infringed, misappropriated or otherwise
      conflicted with Trade Rights of any third parties, which infringement,
      misappropriation or conflict would, singly or in the aggregate, have a
      material adverse effect upon the Company and its subsidiaries, taken as a
      whole.

            (v)   The conduct of the business of the Company and each of its
      subsidiaries is in compliance in all respects with applicable federal,
      state, local and foreign laws and regulations, except where the failure to
      be in compliance would not, singly or in the aggregate, have a material
      adverse effect on the Company and its subsidiaries, taken as a whole.

            (w)   No labor dispute with the employees of the Company or any of
      its subsidiaries exists or, to the knowledge of the Company, is imminent
      which might reasonably be expected to have a material adverse effect on
      the Company and its subsidiaries, taken as a whole; and the Company is not
      aware of any existing or imminent labor disturbance by the employees of
      any of its principal suppliers, joint developers, manufacturers or
      contractors which might be expected to result in any material adverse
      change in the condition, financial or otherwise, or in the earnings,
      business affairs or business prospects of the Company and its
      subsidiaries, taken as a whole.

            (x)   All employee benefit plans (as defined in Section 3(3) of the
      Employee Retirement Income Security Act of 1974, as amended ("ERISA"))
      established, maintained or contributed to by the Company or by any of its
      subsidiaries comply with (to the extent applicable) the requirements of
      ERISA or the comparable applicable laws of any foreign jurisdiction and
      all other applicable law, except for such noncompliance that could not
      reasonably be expected, singly or in the aggregate, to have a material
      adverse effect on the Company and the subsidiaries, taken as a whole; and
      no employee pension benefit plan (as defined in Section 3(2) of ERISA)
      established, maintained, or contributed to by the Company or any of its
      subsidiaries is a multi-employer plan (as defined in Section 3(37) of
      ERISA), or has incurred or assumed an "accumulated funding deficiency"
      within the meaning of Section 302 of ERISA; and neither the Company nor
      any of its subsidiaries has, with respect to any such employee pension
      benefit plan, incurred or assumed any material unfunded liabilities or has
      incurred or assumed, or is jointly or severally liable for, any material
      liability (other than for the payment of premiums) to the Pension Benefit
      Guaranty Corporation.


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      2.    Representations and Warranties of the Selling Shareholders. Each of
the Selling Shareholders represents and warrants to and agrees with each of the
Underwriters that: 

            (a)   Agreement has been duly authorized, executed and delivered by
      or on behalf of such Selling Shareholder.

            (b)   The execution and delivery by such Selling Shareholder of, and
      the performance by such Selling Shareholder of its obligations under, this
      Agreement, the Custody Agreement signed by such Selling Shareholder and
      the Company, as Custodian, relating to the deposit of the Shares to be
      sold by such Selling Shareholder (the "CUSTODY AGREEMENT") and the Power
      of Attorney appointing certain individuals as such Selling Shareholder's
      attorneys-in-fact to the extent set forth therein, relating to the
      transactions contemplated hereby and by the Registration Statement (the
      "POWER OF ATTORNEY") will not contravene any provision of applicable law,
      or the certificate of incorporation or by-laws of such Selling Shareholder
      (if such Selling Shareholder is a corporation), or any agreement or other
      instrument binding upon such Selling Shareholder or any judgment, order or
      decree of any governmental body, agency or court having jurisdiction over
      such Selling Shareholder, and no consent, approval, authorization or order
      of, or qualification with, any governmental body or agency is required for
      the performance by such Selling Shareholder of its obligations under this
      Agreement or the Custody Agreement or Power of Attorney of such Selling
      Shareholder, except such as may be required by the securities or Blue Sky
      laws of the various states in connection with the offer and sale of the
      Shares.

            (c)   Such Selling Shareholder has, and on the Closing Date will
      have, valid title to the Shares to be sold by such Selling Shareholder and
      the legal right and power, and all authorization and approval required by
      law, to enter into this Agreement, the Custody Agreement and the Power of
      Attorney and to sell, transfer and deliver the Shares to be sold by such
      Selling Shareholder.

            (d)   The Custody Agreement and the Power of Attorney have been duly
      authorized, executed and delivered by such Selling Shareholder and are
      valid and binding agreements of such Selling Shareholder.

            (e)   Delivery of the Shares to be sold by such Selling Shareholder
      pursuant to this Agreement will pass title to such Shares 


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      free and clear of any security interests, claims, liens, equities and
      other encumbrances.

            (f)   Such Selling Shareholder has not taken, and will not take,
      directly or indirectly, any action designed to, or which might reasonably
      be expected to, cause or result in stabilization or manipulation of the
      price of any security of the Company to facilitate the sale or resale of
      the Shares pursuant to the distribution contemplated by this Agreement,
      and other than as permitted by the Securities Act, the Selling Shareholder
      has not distributed and will not distribute any prospectus or other
      offering material in connection with the offering and sale of the Shares.

            (g)   (i) the Registration Statement, when it became effective, did
      not contain and, as amended or supplemented, if applicable, will not
      contain any untrue statement of a material fact or omit to state a
      material fact required to be stated therein or necessary to make the
      statements therein not misleading and the Prospectus does not contain and,
      as amended or supplemented, if applicable, will not contain any untrue
      statement of a material fact or omit to state a material fact necessary to
      make the statements therein, in the light of the circumstances under which
      they were made, not misleading, except that the representations and
      warranties set forth in this Section 2(g) apply only to statements or
      omissions in the Registration Statement or the Prospectus based upon
      information relating to such Selling Stockholder furnished to the Company
      in writing by such Selling Stockholder expressly for use therein.

            (h)   If there is any change in the information referred to in
      Section (g) above, the Selling Stockholders will immediately notify the
      Company and you of such change.

      3.    Agreements to Sell and Purchase. Each Seller, severally and not
jointly, hereby agrees to sell to the several Underwriters, and each
Underwriter, upon the basis of the representations and warranties herein
contained, but subject to the conditions hereinafter stated, agrees, severally
and not jointly, to purchase from such Seller at $______ a share (the "PURCHASE
PRICE") the number of Firm Shares (subject to such adjustments to eliminate
fractional shares as you may determine) that bears the same proportion to the
number of Firm Shares to be sold by such Seller as the number of Firm Shares set
forth in Schedule II hereto opposite the name of such Underwriter bears to the
total number of Firm Shares.


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      On the basis of the representations and warranties contained in this
Agreement, and subject to its terms and conditions, the Company agrees to sell
to the Underwriters the Additional Shares, and the Underwriters shall have a
one-time right to purchase, severally and not jointly, up to 525,000 Additional
Shares at the Purchase Price. If you, on behalf of the Underwriters, elect to
exercise such option, you shall so notify the Company in writing not later than
30 days after the date of this Agreement, which notice shall specify the number
of Additional Shares to be purchased by the Underwriters and the date on which
such shares are to be purchased. Such date may be the same as the Closing Date
(as defined below) but not earlier than the Closing Date nor later than ten
business days after the date of such notice. Additional Shares may be purchased
as provided in Section 5 hereof solely for the purpose of covering
over-allotments made in connection with the offering of the Firm Shares. If any
Additional Shares are to be purchased, each Underwriter agrees, severally and
not jointly, to purchase the number of Additional Shares (subject to such
adjustments to eliminate fractional shares as you may determine) that bears the
same proportion to the total number of Additional Shares to be purchased as the
number of Firm Shares set forth in Schedule II hereto opposite the name of such
Underwriter bears to the total number of Firm Shares.
    

      Each Seller hereby agrees that, without the prior written consent of
Morgan Stanley & Co. Incorporated on behalf of the Underwriters, it will not,
during the period ending 90 days after the date of the Prospectus, (i) 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 indirectly, any
shares of Common Stock or any securities convertible into or exercisable or
exchangeable for Common Stock or (ii) 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, whether any such transaction described in
clause (i) or (ii) above is to be settled by delivery of Common Stock or such
other securities, in cash or otherwise. The foregoing sentence shall not apply
to (A) the Shares to be sold hereunder, (B) the issuance by the Company of
shares of Common Stock upon the exercise of an option or warrant or the
conversion of a security outstanding on the date hereof of which the
Underwriters have been advised in writing, (C) the granting of options to
purchase shares of Common Stock under the Company's employee stock option plans
or (D) transactions by any person other than the Company relating to shares of
Common Stock or other securities acquired in open market transactions after the
completion of the offering of the Shares.

      4. Terms of Public Offering. The Sellers are advised by you that the
Underwriters propose to make a public offering of their respective portions of
the Shares as soon after the Registration Statement and this Agreement have


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become effective as in your judgment is advisable. The Sellers are further
advised by you that the Shares are to be offered to the public initially at $___
a share (the "PUBLIC OFFERING PRICE") and to certain dealers selected by you at
a price that represents a concession not in excess of $____ a share under the
Public Offering Price, and that any Underwriter may allow, and such dealers may
reallow, a concession, not in excess of $___ a share, to any Underwriter or to
certain other dealers.

      5. Payment and Delivery. Payment for the Firm Shares to be sold by each
Seller shall be made to such Seller in Federal or other funds immediately
available in New York City against delivery of such Firm Shares for the
respective accounts of the several Underwriters at 10:00 a.m., New York City
time, on April ___, 1998, or at such other time on the same or such other date,
not later than April ___, 1998, as shall be designated in writing by you. The
time and date of such payment are hereinafter referred to as the "CLOSING DATE."

   
      Payment for any Additional Shares shall be made to the Company in Federal
or other funds immediately available in New York City against delivery of such
Additional Shares for the respective accounts of the several Underwriters at
10:00 a.m., New York City time, on the date specified in the notice described in
Section 3 or at such other time on the same or on such other date, in any event
not later than May __, 1998, as shall be designated in writing by you. The time
and date of such payment are hereinafter referred to as the "OPTION CLOSING
DATE."
    

      Certificates for the Firm Shares and Additional Shares shall be in
definitive form and registered in such names and in such denominations as you
shall request in writing not later than one full business day prior to the
Closing Date or the Option Closing Date, as the case may be. The certificates
evidencing the Firm Shares and Additional Shares shall be delivered to you on
the Closing Date or the Option Closing Date, as the case may be, for the
respective accounts of the several Underwriters, with any transfer taxes payable
in connection with the transfer of the Shares to the Underwriters duly paid,
against payment of the Purchase Price therefor.

      6. Conditions to the Underwriters' Obligations. The obligations of the
Sellers to sell the Shares to the Underwriters and the several obligations of
the Underwriters to purchase and pay for the Shares on the Closing Date are
subject to the condition that the Registration Statement shall have become
effective not later than [__________] (New York City time) on the date hereof.

      The several obligations of the Underwriters are subject to the following
further conditions:


                                       11
   13
            (a)   Subsequent to the execution and delivery of this Agreement and
      prior to the Closing Date:

                  (i)   there shall not have occurred any downgrading, nor shall
            any notice have been given of any intended or potential downgrading
            or of any review for a possible change that does not indicate the
            direction of the possible change, in the rating accorded any of the
            Company's securities by any "nationally recognized statistical
            rating organization," as such term is defined for purposes of Rule
            436(g)(2) under the Securities Act; and

                  (ii)  there shall not have occurred any change, or any
            development involving a prospective change, in the condition,
            financial or otherwise, or in the earnings, business or operations
            of the Company and its subsidiaries, taken as a whole, from that set
            forth in the Prospectus (exclusive of any amendments or supplements
            thereto subsequent to the date of this Agreement) that, in your
            judgment, is material and adverse and that makes it, in your
            judgment, impracticable to market the Shares on the terms and in the
            manner contemplated in the Prospectus.

   
            (b)   The Underwriters shall have received on the Closing Date a
      certificate, dated the Closing Date and signed by an executive officer of
      the Company, to the effect set forth in Section 6(a)(i) above and to the
      effect that the representations and warranties of the Company contained in
      this Agreement are true and correct as of the Closing Date and that the
      Company has complied with all of the agreements and satisfied all of the
      conditions on its part to be performed or satisfied hereunder on or before
      the Closing Date. 
    

            The officer signing and delivering such certificate may rely upon
      the best of his or her knowledge as to proceedings threatened.

            (c)   The Underwriters shall have received on the Closing Date an
      opinion of Hale and Dorr LLP, outside counsel for the Company, dated the
      Closing Date, to the effect that:

                  (i)   the Company and each of its domestic subsidiaries has
            been duly incorporated and is an existing corporation in good
            standing under the laws of the jurisdiction of its incorporation,
            with corporate power and authority to own its properties and conduct
            its business as described in the Prospectus; and each of the Company
            and its domestic 


                                       12
   14
      subsidiaries is duly qualified to do business as a foreign corporation in
      good standing in each jurisdiction listed on Schedule I to such opinion,
      which, to such counsel's knowledge, constitute the only jurisdictions in
      which the Company owns or leases real property;

            (ii)  all of the outstanding shares of capital stock of each of the
      Company's domestic subsidiaries have been duly and validly authorized and
      issued and are fully paid and non-assessable, and all outstanding shares
      of capital stock of the Company's subsidiaries are owned of record (and to
      the knowledge of such counsel, after due inquiry, beneficially) directly
      by the Company or another of its subsidiaries, free and clear of any
      perfected security interests, or, to the knowledge of such counsel, any
      other security interests, claims, liens or encumbrances;

            (iii) the Company's authorized equity capitalization is as set forth
      in the Prospectus; the Shares delivered to the Underwriters pursuant to
      this Agreement on such Closing Date have been duly authorized and validly
      issued, are fully paid and nonassessable and conform to the description
      thereof contained in the Prospectus; and the stockholders of the Company
      have no preemptive or similar rights with respect to the issuance of such
      Shares under the Company's certificate of incorporation or by-laws or
      under Delaware law or, to such counsel's knowledge, under any agreement or
      otherwise;

            (iv)  there are no contracts, agreements or understandings known to
      such counsel between the Company and any person granting such person the
      right to require the Company to file a registration statement under the
      Securities Act with respect to any securities of the Company owned or to
      be owned by such person or to require the Company to include such
      securities in the Shares registered pursuant to the Registration Statement
      or in any securities being registered pursuant to any other registration
      statement filed by the Company under the Securities Act, except for (i)
      the rights of CHARTH, a subsidiary of Electricite de France, which have
      been duly waived, (ii) "piggyback" registration rights of Invemed
      Associates, Inc. and Cristina Kepner with respect to shares of Common
      Stock issuable upon the exercise of warrants held by them (which warrants
      are not yet exercisable), which have been duly waived, (iii) "demand"
      registration rights of the Electric Power Research Institute with 


                                       13
   15
      respect to shares of Common Stock issuable upon the exercise of a warrant
      held by it (which warrant has not yet been exercised), and (iv) "demand"
      registration rights of various persons and entities with respect to Common
      Stock received pursuant to the Company's acquisition of Superconductivity,
      Inc. in April 1997;

            (v)    no consent, approval, authorization or order of, or filing
      with, any governmental agency or body or any court is required for the
      consummation of the transactions contemplated by this Agreement in
      connection with the issuance or sale of the Shares by the Company, except
      such as have been obtained or made under the Securities Act and such as
      may be required under state securities laws;

            (vi)   this Agreement has been duly authorized, executed and
      delivered by the Company;

            (vii)  the execution, delivery and performance of this Agreement and
      the consummation of the transactions herein contemplated, including the
      issuance and sale of the Shares by the Company, will not result in a
      breach or violation of any of the terms and provisions of, or constitute a
      default under, or result in the creation or imposition of any lien, charge
      or encumbrance upon any property or assets of the Company or any of its
      subsidiaries pursuant to, any statute or any rule or regulation of any
      governmental agency or body, or the charter or by-laws of the Company or
      any of its subsidiaries, or, to the knowledge of such counsel, any order
      of any governmental agency or body or any court having jurisdiction over
      the Company or any of its subsidiaries or any of their respective
      properties, or, to the knowledge of such counsel, any agreement or
      instrument to which the Company or any of its subsidiaries is a party that
      has been filed as an exhibit to a document filed by the Company under the
      Exchange Act or otherwise described in the Registration Statement, and the
      Company has full power and authority to authorize, issue and sell all of
      the Shares sold by it as contemplated by this Agreement;

            (viii) the Company is not and, after giving effect to the offering
      and sale of the Shares and the application of the proceeds thereof as
      described in the Prospectus, will not be an "investment company" as such
      term is defined in the Investment Company Act of 1940, as amended; and


                                       14
   16
            (ix) (A) the Registration Statement was declared effective under the
      Securities Act as of the date and time specified in such opinion, the
      Prospectus either was filed with the Commission pursuant to Rule 424(b) on
      the date specified in such opinion or was included in the Registration
      Statement (as the case may be), and to the best of such counsel's
      knowledge, no stop order suspending the effectiveness of the Registration
      Statement or any part thereof has been issued and no proceedings for that
      purpose have been instituted or are pending or threatened under the
      Securities Act, and the Registration Statement and the Prospectus, as of
      their respective effective or issue dates, complied as to form in all
      material respects with the requirements of the Securities Act and the
      rules and regulations issued thereunder; (B) such counsel has no reason to
      believe that the Registration Statement and the prospectus included
      therein at the time the Registration Statement became effective, contained
      any untrue statement of a material fact or omitted to state any material
      fact required to be stated therein or necessary to make the statements
      therein not misleading, or that the Prospectus, as of the Closing Date or
      the Optional Closing Date, as the case may be, contains any untrue
      statement of a material fact or omits to state any material fact necessary
      to make the statements therein, in light of the circumstances under which
      they were made, not misleading; (C) each document incorporated by
      reference in the Registration Statement and the Prospectus complied as to
      form in all material respects when filed with the Commission with the
      requirements of the Exchange Act and the rules and regulations issued
      thereunder; (D) the descriptions in the Registration Statement and the
      Prospectus of matters of law, statutes, legal and governmental proceedings
      and contracts and other documents (including, without limitation, such
      descriptions in the Prospectus under the caption "Business--Patents, Trade
      Secrets and Licenses") are accurate in all material respects and fairly
      present the information required to be shown; and (E) such counsel does
      not know of any legal or governmental proceedings pending or threatened to
      which the Company or any of its subsidiaries is a party or to which any of
      the properties of the Company or any of its subsidiaries are subject that
      are required to be described in the Registration Statement or the
      Prospectus and are not described as required, or of any statutes or
      regulations that are required, by the Securities Act or the rules and
      regulations issued thereunder, to be described in the Registration
      Statement or the Prospectus, or of any contracts or other documents that
      are required to be described in the 


                                       15
   17
      Registration Statement or the Prospectus or to be filed as exhibits to the
      Registration Statement or to any document incorporated by reference in the
      Registration Statement or the Prospectus which are not described, or filed
      as required; it being understood that such counsel need express no opinion
      as to the financial statements or other financial and statistical data
      contained in the Registration Statement or the Prospectus;

      (d)   The Underwriters shall have received on the Closing Date an opinion
of Hale and Dorr LLP, counsel for the Selling Shareholders, dated the Closing
Date, to the effect that:

            (i)   this Agreement has been duly authorized, executed and 
      delivered by or on behalf of each of the Selling Shareholders;

            (ii)  the execution and delivery by each Selling Shareholder of, and
      the performance by such Selling Shareholder of its obligations under, this
      Agreement and the Custody Agreement and Power of Attorney of such Selling
      Shareholder will not contravene any provision of applicable law, or the
      certificate of incorporation or by-laws of such Selling Shareholder (if
      such Selling Shareholder is a corporation), or, to the best of such
      counsel's knowledge, any agreement or other instrument binding upon such
      Selling Shareholder or, to the best of such counsel's knowledge, any
      judgment, order or decree of any governmental body, agency or court having
      jurisdiction over such Selling Shareholder, and no consent, approval,
      authorization or order of, or qualification with, any governmental body or
      agency is required for the performance by such Selling Shareholder of its
      obligations under this Agreement or the Custody Agreement or Power of
      Attorney of such Selling Shareholder, except such as have been obtained or
      made under the Securities Act and such as may be required by the
      securities or Blue Sky laws of the various states in connection with offer
      and sale of the Shares;

            (iii) each of the Selling Shareholders has the legal right and
      power, and all authorization and approval required by law, to enter into
      this Agreement and the Custody Agreement and Power of Attorney of such
      Selling Shareholder and to sell, transfer and deliver the Shares to be
      sold by such Selling Shareholder;


                                       16
   18
            (iv)  the Custody Agreement and the Power of Attorney of each
      Selling Shareholder have been duly authorized, executed and delivered by
      such Selling Shareholder and are valid and binding agreements of such
      Selling Shareholder; and

            (v)   delivery to the Underwriters of the Shares to be sold by each
      Selling Shareholder pursuant to this Agreement will pass title to such
      Shares to such Underwriter free and clear of any adverse claim (as defined
      in Article 8 of the UCC), assuming such Underwriter had no notice of such
      adverse claim.

      (e)   The Underwriters shall have received on the Closing Date an opinion
of Davis Polk & Wardwell, counsel for the Underwriters, dated the Closing Date,
to the effect that:

            (i)   the Shares to be sold by the Company have been duly authorized
      and, when issued and delivered in accordance with the terms of this
      Agreement, will be validly issued, fully paid and non-assessable, and the
      issuance of such Shares will not be subject to any preemptive or similar
      rights;

            (ii)  this Agreement has been duly authorized, executed and
      delivered by the Company;

            (iii) the statements in the Prospectus under the caption
      "Underwriters" insofar as such statements constitute summaries of the
      legal matters, documents or proceedings referred to therein, fairly
      present the information called for with respect to such legal matters,
      documents and proceedings and fairly summarize the matters referred to
      therein;

            (iv)  such counsel is of the opinion that the Registration Statement
      and Prospectus (except for financial statements and schedules and other
      financial and statistical data included therein as to which such counsel
      need not express any opinion) comply as to form in all material respects
      with the Securities Act and the applicable rules and regulations of the
      Commission thereunder, has no reason to believe that (except for financial
      statements and schedules and other financial and statistical data as to
      which such counsel need not express any belief) the Registration Statement
      and the prospectus included therein at the time the Registration Statement
      became effective contained any untrue statement of a material fact or
      omitted to state a material fact required to be stated therein or


                                       17
   19
      necessary to make the statements therein not misleading and has no reason
      to believe that (except for financial statements and schedules and other
      financial and statistical data as to which such counsel need not express
      any belief) the Prospectus contains any untrue statement of a material
      fact or omits to state a material fact necessary in order to make the
      statements therein, in the light of the circumstances under which they
      were made, not misleading.

   
      With respect to Section 6(e)(iv) above, Davis Polk & Wardwell and with
respect to Section 6(c)(x)(B) above, Hale and Dorr LLP, may state that their
opinion and belief are based upon their participation in the preparation of the
Registration Statement and Prospectus and any amendments or supplements thereto
and documents incorporated by reference and review and discussion of the
contents thereof, but are without independent check or verification, except as
specified. With respect to clauses (B) and (C) of Section 6(e)(iv) above, Davis
Polk & Wardwell may state that their opinion and belief are based upon their
participation in the preparation of the Registration Statement and Prospectus
and any amendments or supplements thereto (other than the documents incorporated
by reference) and upon review and discussion of the contents thereof (including
documents incorporated by reference), but are without independent check or
verification, except as specified. With respect to Section 6(d) above, Hale and
Dorr LLP may rely upon an opinion or opinions of counsel for any Selling
Shareholders and, with respect to factual matters and to the extent such counsel
deems appropriate, upon the representations of each Selling Shareholder
contained herein and in the Custody Agreement and Power of Attorney of such
Selling Shareholder and in other documents and instruments; provided that (A)
each such counsel for the Selling Shareholders is reasonably satisfactory to
your counsel, (B) a copy of each opinion so relied upon is delivered to you and
is in form and substance reasonably satisfactory to your counsel, (C) copies of
such Custody Agreements and Powers of Attorney and of any such other documents
and instruments shall be delivered to you and shall be in form and substance
reasonably satisfactory to your counsel and (D) Hale and Dorr LLP shall state in
their opinion that they believe they are justified in relying on each such other
opinion.
    

   
      The opinion of Hale and Dorr LLP described in Sections 6(c) and 6(d) above
(and any opinions of counsel for any Selling Shareholder referred to in the
immediately preceding paragraph) shall be rendered to the Underwriters at the
request of the Company or one or 
    


                                       18
   20
more of the Selling Shareholders, as the case may be, and shall so state
therein.

            (f) The Underwriters shall have received, on each of the date hereof
      and the Closing Date, letters dated the date hereof or the Closing Date,
      as the case may be, in form and substance satisfactory to the
      Underwriters, from Coopers & Lybrand, L.L.P., Ernst & Young LLP and Smith
      & Gesteland LLP, each an independent public accounting firm, containing
      statements and information of the type ordinarily included in accountants'
      "comfort letters" to underwriters with respect to the financial statements
      and certain financial information contained in, or incorporated by
      reference in, the Registration Statement and the Prospectus; provided that
      the letters delivered on the Closing Date shall use a "cut-off date" not
      earlier than the date hereof.

            (g) The "lock-up" agreements, each substantially in the form of
      Exhibit A hereto, between you and certain shareholders, officers and
      directors of the Company relating to sales and certain other dispositions
      of shares of Common Stock or certain other securities, delivered to you on
      or before the date hereof, shall be in full force and effect on the
      Closing Date.

      The several obligations of the Underwriters to purchase Additional Shares
hereunder are subject to the delivery to you on the Option Closing Date of such
documents as you may reasonably request with respect to the good standing of the
Company, the due authorization and issuance of the Additional Shares and other
matters related to the issuance of the Additional Shares.

      7.   Covenants of the Company. In further consideration of the agreements
of the Underwriters herein contained, the Company covenants with each
Underwriter as follows:

   
            (a) To furnish to you, without charge, three signed copies of the
      Registration Statement (including exhibits thereto and documents
      incorporated by reference therein) and to each other Underwriter a copy of
      the Registration Statement (without exhibits thereto but including
      documents incorporated by reference therein) and to furnish to you in New
      York City, without charge, prior to 10:00 a.m. New York City time on the
      business day next succeeding the date of this Agreement and during the
      period mentioned in Section 7(c) below, as many copies of the Prospectus,
      any documents incorporated by reference therein, and any supplements and
      amendments thereto or to the Registration Statement as you may reasonably
      request. The terms "SUPPLEMENT" and "AMENDMENT" or "AMEND" as used in this
      Agreement shall include all 
    


                                       19
   21
      documents subsequently filed by the Company with the Commission pursuant
      to the Exchange Act that are deemed to be incorporated by reference in the
      Prospectus.

            (b) Before amending or supplementing the Registration Statement or
      the Prospectus, to furnish to you a copy of each such proposed amendment
      or supplement and not to file any such proposed amendment or supplement to
      which you reasonably object, and to file with the Commission within the
      applicable period specified in Rule 424(b) under the Securities Act any
      prospectus required to be filed pursuant to such Rule.

            (c) If, during such period after the first date of the public
      offering of the Shares as in the opinion of counsel for the Underwriters
      the Prospectus is required by law to be delivered in connection with sales
      by an Underwriter or dealer, any event shall occur or condition exist as a
      result of which it is necessary to amend or supplement the Prospectus in
      order to make the statements therein, in the light of the circumstances
      when the Prospectus is delivered to a purchaser, not misleading, or if, in
      the opinion of counsel for the Underwriters, it is necessary to amend or
      supplement the Prospectus to comply with applicable law, forthwith to
      prepare, file with the Commission and furnish, at its own expense, to the
      Underwriters and to the dealers (whose names and addresses you will
      furnish to the Company) to which Shares may have been sold by you on
      behalf of the Underwriters and to any other dealers upon request, either
      amendments or supplements to the Prospectus so that the statements in the
      Prospectus as so amended or supplemented will not, in the light of the
      circumstances when the Prospectus is delivered to a purchaser, be
      misleading or so that the Prospectus, as amended or supplemented, will
      comply with law.

            (d) To endeavor to qualify the Shares for offer and sale under the
      securities or Blue Sky laws of such jurisdictions as you shall reasonably
      request.

            (e) To make generally available to the Company's security holders
      and to you as soon as practicable an earning statement covering the
      twelve-month period ending June 30, 1999 that satisfies the provisions of
      Section 11(a) of the Securities Act and the rules and regulations of the
      Commission thereunder.

      8.    Expenses. Whether or not the transactions contemplated in this
Agreement are consummated or this Agreement is terminated, the Sellers agree to
pay or cause to be paid all expenses incident to the performance of their


                                       20
   22
   
obligations under this Agreement, including: (i) the fees, disbursements and
expenses of the Company's counsel, the Company's accountants and counsel for the
Selling Shareholders in connection with the registration and delivery of the
Shares under the Securities Act and all other fees or expenses in connection
with the preparation and filing of the Registration Statement, any preliminary
prospectus, the Prospectus and amendments and supplements to any of the
foregoing, including all printing costs associated therewith, and the mailing
and delivering of copies thereof to the Underwriters and dealers, in the
quantities hereinabove specified, (ii) all costs and expenses related to the
transfer and delivery of the Shares to the Underwriters, including any transfer
or other taxes payable thereon, (iii) the cost of printing or producing any Blue
Sky or Legal Investment memorandum in connection with the offer and sale of the
Shares under state securities laws and all expenses in connection with the
qualification of the Shares for offer and sale under state securities laws as
provided in Section 7(d) hereof, including filing fees and the reasonable fees
and disbursements of counsel for the Underwriters in connection with such
qualification and in connection with the Blue Sky or Legal Investment
memorandum, (iv) all filing fees and the reasonable fees and disbursements of
counsel to the Underwriters incurred in connection with the review and
qualification of the offering of the Shares by the National Association of
Securities Dealers, Inc., (v) the cost of printing certificates representing the
Shares, (vi) the costs and charges of any transfer agent, registrar or
depositary, (vii) the costs and expenses of the Company relating to investor
presentations on any "road show" undertaken in connection with the marketing of
the offering of the Shares, including, without limitation, expenses associated
with the production of road show slides and graphics, fees and expenses of any
consultants engaged in connection with the road show presentations with the
prior approval of the Company, travel and lodging expenses of the
representatives and officers of the Company and any such consultants, and the
cost of any aircraft chartered in connection with the road show, and (viii) all
other costs and expenses incident to the performance of the obligations of the
Company hereunder for which provision is not otherwise made in this Section. It
is understood, however, that except as provided in this Section, Section 9
entitled "Indemnity and Contribution", and the last paragraph of Section 11
below, the Underwriters will pay all of their costs and expenses, including fees
and disbursements of their counsel, stock transfer taxes payable on resale of
any of the Shares by them, their "road show" expenses and any advertising
expenses connected with any offers they may make.
    

      The provisions of this Section shall not supersede or otherwise affect any
agreement that the Sellers may otherwise have for the allocation of such
expenses among themselves.


                                       21
   23
      9.    Indemnity and Contribution. The Company agrees to indemnify and hold
harmless each Underwriter and each person, if any, who controls any Underwriter
within the meaning of either Section 15 of the Securities Act or Section 20 of
the Exchange Act, from and against any and all losses, claims, damages and
liabilities (including, without limitation, any legal or other expenses
reasonably incurred in connection with defending or investigating any such
action or claim) caused by any untrue statement or alleged untrue statement of a
material fact contained in the Registration Statement or any amendment thereof,
any preliminary prospectus or the Prospectus (as amended or supplemented if the
Company shall have furnished any amendments or supplements thereto), or caused
by any omission or alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein not misleading,
except insofar as such losses, claims, damages or liabilities are caused by any
such untrue statement or omission or alleged untrue statement or omission based
upon information relating to any Underwriter furnished to the Company in writing
by such Underwriter through you expressly for use therein and except that such
indemnity agreement shall not inure to the benefit of any Underwriter from whom
the person asserting any loss, claim, damage or liability purchased Shares, or
any person controlling such Underwriter, if the Prospectus (as then amended or
supplemented, if the Company shall have furnished any amendments or supplements
thereto) was not sent or given by or on behalf of such Underwriter to such
person, if required by law so to have been delivered, at or prior to the written
confirmation of the sale of the Shares to such person, and if the Prospectus (as
so amended or supplemented) would have cured the defect giving rise to such
loss, claim, damage or liability.

      (b)   Each Selling Shareholder agrees, severally and not jointly, to
indemnify and hold harmless each Underwriter and the Company, its directors, its
officers who sign the Registration Statement and each person, if any, who
controls any Underwriter or the Company within the meaning of either Section 15
of the Securities Act or Section 20 of the Exchange Act, from and against any
and all losses, claims, damages and liabilities (including, without limitation,
any legal or other expenses reasonably incurred in connection with defending or
investigating any such action or claim) caused by any untrue statement or
alleged untrue statement of a material fact contained in the Registration
Statement or any amendment thereof, any preliminary prospectus or the Prospectus
(as amended or supplemented if the Company shall have furnished any amendments
or supplements thereto), or caused by any omission or alleged omission to state
therein a material fact required to be stated therein or necessary to make the
statements therein not misleading, but only with reference to information
relating to such Selling Shareholder furnished in writing by or on behalf of
such Selling Shareholder expressly for use in the 


                                       22
   24
Registration Statement, any preliminary prospectus, the Prospectus or any
amendments or supplements thereto.

      (c) Each Underwriter agrees, severally and not jointly, to indemnify and
hold harmless the Company, the Selling Shareholders, the directors of the
Company, the officers of the Company who sign the Registration Statement and
each person, if any, who controls the Company or any Selling Shareholder within
the meaning of either Section 15 of the Securities Act or Section 20 of the
Exchange Act from and against any and all losses, claims, damages and
liabilities (including, without limitation, any legal or other expenses
reasonably incurred in connection with defending or investigating any such
action or claim) caused by any untrue statement or alleged untrue statement of a
material fact contained in the Registration Statement or any amendment thereof,
any preliminary prospectus or the Prospectus (as amended or supplemented if the
Company shall have furnished any amendments or supplements thereto), or caused
by any omission or alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein not misleading,
but only with reference to information relating to such Underwriter furnished to
the Company in writing by such Underwriter through you expressly for use in the
Registration Statement, any preliminary prospectus, the Prospectus or any
amendments or supplements thereto.

   
      (d) In case any proceeding (including any governmental investigation)
shall be instituted involving any person in respect of which indemnity may be
sought pursuant to Section 9(a), 9(b) or 9(c), such person (the "INDEMNIFIED
PARTY") shall promptly notify the person against whom such indemnity may be
sought (the "INDEMNIFYING PARTY") in writing and the indemnifying party, upon
request of the indemnified party, shall retain counsel reasonably satisfactory
to the indemnified party to represent the indemnified party and any others the
indemnifying party may designate in such proceeding and shall pay the fees and
disbursements of such counsel related to such proceeding. In any such
proceeding, any indemnified party shall have the right to retain its own
counsel, but the fees and expenses of such counsel shall be at the expense of
such indemnified party unless (i) the indemnifying party and the indemnified
party shall have mutually agreed to the retention of such counsel or (ii) the
named parties to any such proceeding (including any impleaded parties) include
both the indemnifying party and the indemnified party and representation of both
parties by the same counsel would be inappropriate due to actual or potential
differing interests between them. It is understood that the indemnifying party
shall not, in respect of the legal expenses of any indemnified party in
connection with any proceeding or related proceedings in the same jurisdiction,
be liable for (i) the fees and expenses of more than one separate firm (in
addition to any local counsel) for all Underwriters and all persons, if any, who
control any Underwriter within the meaning of either 
    


                                       23
   25
Section 15 of the Securities Act or Section 20 of the Exchange Act, (ii) the
fees and expenses of more than one separate firm (in addition to any local
counsel) for the Company, its directors, its officers who sign the Registration
Statement and each person, if any, who controls the Company within the meaning
of either such Section and (iii) the fees and expenses of more than one separate
firm (in addition to any local counsel) for all Selling Shareholders and all
persons, if any, who control any Selling Shareholder within the meaning of
either such Section, and that all such fees and expenses shall be reimbursed as
they are incurred. In the case of any such separate firm for the Underwriters
and such control persons of any Underwriters, such firm shall be designated in
writing by Morgan Stanley & Co. Incorporated. In the case of any such separate
firm for the Company, and such directors, officers and control persons of the
Company, such firm shall be designated in writing by the Company. In the case of
any such separate firm for the Selling Shareholders and such control persons of
any Selling Shareholders, such firm shall be designated in writing by the
persons named as attorneys-in-fact for the Selling Shareholders under the Powers
of Attorney. The indemnifying party shall not be liable for any settlement of
any proceeding effected without its written consent, but if settled with such
consent or if there be a final judgment for the plaintiff, the indemnifying
party agrees to indemnify the indemnified party from and against any loss or
liability by reason of such settlement or judgment. Notwithstanding the
foregoing sentence, if at any time an indemnified party shall have requested an
indemnifying party to reimburse the indemnified party for fees and expenses of
counsel as contemplated by the second and third sentences of this paragraph, the
indemnifying party agrees that it shall be liable for any settlement of any
proceeding effected without its written consent if such settlement is entered
into more than 30 days after receipt by such indemnifying party of the aforesaid
request, such indemnifying party shall have received notice of the specific
terms of such settlement at least 15 days prior to such settlement being
effected, and such indemnifying party shall not have reimbursed the indemnified
party in accordance with such request prior to the date of such settlement
(unless such indemnifying party is at that time disputing in good faith the
entitlement of such indemnified party to such reimbursement under the terms of
this Section 9). No indemnifying party shall, without the prior written consent
of the indemnified party, effect any settlement of any pending or threatened
proceeding in respect of which any indemnified party is or could have been a
party and indemnity could have been sought hereunder by such indemnified party,
unless such settlement includes an unconditional release of such indemnified
party from all liability on claims that are the subject matter of such
proceeding.

   
      (e) To the extent the indemnification provided for in Section 9(a), 9(b)
or 9(c) is unavailable to an indemnified party or insufficient in respect of 
    


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any losses, claims, damages or liabilities provided for under the terms of such
sections, then each indemnifying party under such paragraph, in lieu of
indemnifying such indemnified party thereunder, shall contribute to the amount
paid or payable by such indemnified party as a result of such losses, claims,
damages or liabilities in such proportion as is appropriate to reflect the
relative benefits received by the indemnifying party or parties on the one hand
and the indemnified party or parties on the other hand from the offering of the
Shares or (ii) if the allocation provided by clause 9(e)(i) above is not
permitted by applicable law, in such proportion as is appropriate to reflect not
only the relative benefits referred to in clause 9(e)(i) above but also the
relative fault of the indemnifying party or parties on the one hand and of the
indemnified party or parties on the other hand in connection with the statements
or omissions that resulted in such losses, claims, damages or liabilities, as
well as any other relevant equitable considerations. The relative benefits
received by the Sellers on the one hand and the Underwriters on the other hand
in connection with the offering of the Shares shall be deemed to be in the same
respective proportions as the net proceeds from the offering of the Shares
(before deducting expenses) received by each Seller and the total underwriting
discounts and commissions received by the Underwriters, in each case as set
forth in the table on the cover of the Prospectus, bear to the aggregate Public
Offering Price of the Shares. The relative fault of the Sellers on the one hand
and the Underwriters on the other hand shall be determined by reference to,
among other things, whether the untrue or alleged untrue statement of a material
fact or the omission or alleged omission to state a material fact relates to
information supplied by the Sellers or by the Underwriters and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission. The Underwriters' respective obligations to
contribute pursuant to this Section are several in proportion to the respective
number of Shares they have purchased hereunder, and not joint.
    

   
      (f) The Sellers and the Underwriters agree that it would not be just or
equitable if contribution pursuant to this Section 9 were determined by pro rata
allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation that does not take account of the
equitable considerations referred to in Section 9(e). The amount paid or payable
by an indemnified party as a result of the losses, claims, damages and
liabilities referred to in the immediately preceding paragraph shall be deemed
to include, subject to the limitations set forth in Section 9(c), any legal or
other expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim. Notwithstanding the
provisions of this Section 9, no Underwriter shall be required to contribute any
amount in excess of the amount by which the total price at which the Shares
underwritten by it and distributed to the public were offered to the public
exceeds the amount of any damages that such Underwriter has otherwise been
    


                                       25
   27
   
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission. No person guilty of fraudulent misrepresentation (within
the meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation. The remedies provided for in this Section 9 are not exclusive
and shall not limit any rights or remedies which may otherwise be available to
any indemnified party at law or in equity.
    

   
      (g)   The indemnity and contribution provisions contained in this Section
9 and the representations, warranties and other statements of the Company and
the Selling Shareholders contained in this Agreement shall remain operative and
in full force and effect regardless of any termination of this Agreement, any
investigation made by or on behalf of any Underwriter or any person controlling
any Underwriter, any Selling Shareholder or any person controlling any Selling
Shareholder, or the Company, its officers or directors or any person controlling
the Company and acceptance of and payment for any of the Shares.
    

   
      10.   Termination. This Agreement shall be subject to termination by
notice given by you to the Company, if after the execution and delivery of this
Agreement and prior to the Closing Date trading generally shall have been
suspended or materially limited on or by, as the case may be, any of the New
York Stock Exchange, the American Stock Exchange, the National Association of
Securities Dealers, Inc., the Chicago Board of Options Exchange, the Chicago
Mercantile Exchange or the Chicago Board of Trade, trading of any securities of
the Company shall have been suspended on any exchange or in any over-the-counter
market, a general moratorium on commercial banking activities in New York shall
have been declared by either Federal or New York State authorities or there
shall have occurred any outbreak or escalation of hostilities or any change in
financial markets or any calamity or crisis that, in your judgment, is material
and adverse and in the case of any of the events specified in clauses
10(a)(i) through 10(a)(iv), such event, singly or together with any other such
event, makes it, in your judgment, impracticable to market the Shares on the
terms and in the manner contemplated in the Prospectus.
    

      11.   Effectiveness; Defaulting Underwriters. This Agreement shall become
effective upon the execution and delivery hereof by the parties hereto.

      If, on the Closing Date or the Option Closing Date, as the case may be,
any one or more of the Underwriters shall fail or refuse to purchase Shares that
it has or they have agreed to purchase hereunder on such date, and the aggregate
number of Shares which such defaulting Underwriter or Underwriters agreed but
failed or refused to purchase is not more than one-tenth of the 


                                       26
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aggregate number of the Shares to be purchased on such date, the other
Underwriters shall be obligated severally in the proportions that the number of
Firm Shares set forth opposite their respective names in Schedule II bears to
the aggregate number of Firm Shares set forth opposite the names of all such
non-defaulting Underwriters, or in such other proportions as you may specify, to
purchase the Shares which such defaulting Underwriter or Underwriters agreed but
failed or refused to purchase on such date; provided that in no event shall the
number of Shares that any Underwriter has agreed to purchase pursuant to this
Agreement be increased pursuant to this Section 11 by an amount in excess of
one-ninth of such number of Shares without the written consent of such
Underwriter. If, on the Closing Date, any Underwriter or Underwriters shall fail
or refuse to purchase Firm Shares and the aggregate number of Firm Shares with
respect to which such default occurs is more than one-tenth of the aggregate
number of Firm Shares to be purchased, and arrangements satisfactory to you, the
Company and the Selling Shareholders for the purchase of such Firm Shares are
not made within 36 hours after such default, this Agreement shall terminate
without liability on the part of any non-defaulting Underwriter, the Company or
the Selling Shareholders. In any such case either you or the relevant Sellers
shall have the right to postpone the Closing Date, but in no event for longer
than seven days, in order that the required changes, if any, in the Registration
Statement and in the Prospectus or in any other documents or arrangements may be
effected. If, on the Option Closing Date, any Underwriter or Underwriters shall
fail or refuse to purchase Additional Shares and the aggregate number of
Additional Shares with respect to which such default occurs is more than
one-tenth of the aggregate number of Additional Shares to be purchased, the
non-defaulting Underwriters shall have the option to (i) terminate their
obligation hereunder to purchase Additional Shares or (ii) purchase not less
than the number of Additional Shares that such non-defaulting Underwriters would
have been obligated to purchase in the absence of such default. Any action taken
under this paragraph shall not relieve any defaulting Underwriter from liability
in respect of any default of such Underwriter under this Agreement.
    

      If this Agreement shall be terminated by the Underwriters, or any of them,
because of any failure or refusal on the part of any Seller to comply with the
terms or to fulfill any of the conditions of this Agreement, or if for any
reason any Seller shall be unable to perform its obligations under this
Agreement, the Sellers will reimburse the Underwriters or such Underwriters as
have so terminated this Agreement with respect to themselves, severally, for all
out-of-pocket expenses (including the fees and disbursements of their counsel)
reasonably incurred by such Underwriters in connection with this Agreement or
the offering contemplated hereunder.


                                       27
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      12.   Counterparts. This Agreement may be signed in two or more
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

      13.   Applicable Law. This Agreement shall be governed by and construed in
accordance with the internal laws of the State of New York.

      14.   Headings. The headings of the sections of this Agreement have been
inserted for convenience of reference only and shall not be deemed a part of
this Agreement.

                                  Very truly yours,

                                  AMERICAN SUPERCONDUCTOR
                                     CORPORATION

                                  By:_____________________________________
                                      Name:
                                      Title:

                                  The Selling Shareholders named in 
                                      Schedule I hereto, acting severally



                                  By:_____________________________________
                                      Attorney-in-Fact

Accepted as of the date hereof

Morgan Stanley & Co. Incorporated
NationsBanc Montgomery Securities LLC

Acting severally on behalf of themselves
and the several Underwriters named in
Schedule II hereto.

By: Morgan Stanley & Co. Incorporated



By:_____________________________________
    Name:
    Title:



                                       28
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                                                                      SCHEDULE I

NUMBER OF FIRM SHARES SELLING SHAREHOLDER TO BE SOLD -------------------------------------------- --------------------- Pierce Nordquist Partners II, L.P. ......... 2,252 Adhill Limited Partnership ................. 33,412 Advent Future Limited Partnership .......... 33,412 Advent International Investors Limited Partnership ............................. 1,234 Advent Performance Materials Limited Partnership ............................. 33,412 Adwest Limited Partnership ................. 33,412 World Technology Limited Partnership ....... 33,412 Materia Ventures I, L.P. ................... 97,763 MidAmerican Capital Company ................ 114,291 Xerox Corporation .......................... 88,279 ------- 470,879 =======
31 SCHEDULE II
NUMBER OF FIRM SHARES UNDERWRITER TO BE PURCHASED ------------------------------------------- --------------------- Morgan Stanley & Co. Incorporated ......... NationsBanc Montgomery Securities LLC ..... --------- Total: ................................. 3,500,000 =========
32 EXHIBIT A [FORM OF LOCK-UP LETTER] April ____, 1998 Morgan Stanley & Co. Incorporated NationsBanc Montgomery Securities LLC c/o Morgan Stanley & Co. Incorporated 1585 Broadway New York, NY 10036 Dear Sirs and Mesdames: The undersigned understands that Morgan Stanley & Co. Incorporated ("MORGAN STANLEY") proposes to enter into an Underwriting Agreement (the "UNDERWRITING AGREEMENT") with American Superconductor Corporation, a Delaware corporation (the "COMPANY"), providing for the public offering (the "PUBLIC OFFERING") by the several Underwriters, including Morgan Stanley (the "UNDERWRITERS"), of ___ shares (the "SHARES") of the Common Stock, par value $.01 per share, of the Company (the "COMMON STOCK"). To induce the Underwriters that may participate in the Public Offering to continue their efforts in connection with the Public Offering, the undersigned hereby agrees that, without the prior written consent of Morgan Stanley on behalf of the Underwriters, it will not, during the period commencing on the date on which the Company initially files the registration statement with the Securities and Exchange Commission with respect to the Public Offering and ending 90 days after the date of the final prospectus relating to the Public Offering (the "PROSPECTUS"), (1) 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 indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock, or (2) 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, whether any such transaction described in clause (1) or (2) above is to be settled by delivery of Common Stock or such other securities, in cash or otherwise. The foregoing sentence shall not apply to (a) the sale of any Shares to the Underwriters pursuant to the Underwriting Agreement or (b) transactions relating to shares of Common Stock or other securities acquired in open market transactions after the completion of the Public Offering. In addition, the 33 undersigned agrees that, without the prior written consent of Morgan Stanley on behalf of the Underwriters, it will not, during the period commencing on the date hereof and ending 90 days after the date of the Prospectus, make any demand for or exercise any right with respect to, the registration of any shares of Common Stock or any security convertible into or exercisable or exchangeable for Common Stock. Whether or not the Public Offering actually occurs depends on a number of factors, including market conditions. Any Public Offering will only be made pursuant to an Underwriting Agreement, the terms of which are subject to negotiation between the Company and the Underwriters. This Agreement will be null and void, if the Public Offering is not consummated by [July 31/October 31, 1998.] Very truly yours, ____________________________________ (Name) ____________________________________ (Address) 2
   1
                               HALE AND DORR LLP
                               Counsellors at Law

                  60 State Street, Boston, Massachusetts 02109
                        617-526-6000 * Fax 617-526-5000


                                                                  March 24, 1998

American Superconductor Corporation
Two Technology Drive
Westborough, MA 01581

   Re: Registration Statement on Form S-3

Ladies and Gentlemen:

   This opinion is furnished to you in connection with a Registration Statement
on Form S-3 (the "Registration Statement") filed with the Securities and
Exchange Commission (the "Commission") under the Securities Act of 1933, as
amended (the "Securities Act"), for the registration of an aggregate of
4,025,000 shares of Common Stock, $0.01 par value per share (the "Shares"), of
American Superconductor Corporation, a Delaware corporation (the "Company"), of
which (i) up to 3,554,121 Shares (including 525,000 Shares issuable upon
exercise of an over-allotment option granted by the Company) will be issued and
sold by the Company and (ii) the remaining 470,879 Shares will be sold by
certain stockholders of the Company (the "Selling Stockholders").

   The Shares are to be sold by the Company and the Selling Stockholders
pursuant to an underwriting agreement (the "Underwriting Agreement") to be
entered into by and among the Company, the Selling Stockholders and Morgan
Stanley & Co. Incorporated and NationsBanc Montgomery Securities LLC, as
representatives of the several underwriters named in the Underwriting
Agreement, the form of which has been filed as Exhibit 1.1 to the Registration
Statement.

   We are acting as counsel for the Company in connection with the sale by the
Company and the Selling Stockholders of the Shares. We have examined signed
copies of the Registration Statement as filed with the Commission. We have also
examined and relied upon a draft of the Underwriting Agreement, minutes of
meetings of the stockholders and the Board of Directors of the Company as
provided to us by the Company, stock record books of the Company as provided to
us by the Company, the Restated Certificate of Incorporation and By-Laws of the
Company, as amended to date, and such other documents as we have deemed
necessary for purposes of rendering the opinions hereinafter set forth.


Washington, DC                     Boston, MA                        London, UK*
- --------------------------------------------------------------------------------
              HALE AND DORR LLP INCLUDES PROFESSIONAL CORPORATIONS
 *BROBECK HALE AND DORR, INTERNATIONAL (AN INDEPENDENT JOINT VENTURE LAW FIRM)
   2
American Superconductor Corporation
March 24, 1998
Page 2

     In our examination of the foregoing documents, we have assumed the
genuineness of all signatures, the authenticity of all documents submitted to
us as originals, the conformity to original documents of all documents
submitted to us as copies, the authenticity of the originals of such latter
documents and the legal competence of all signatories to such documents.

     We assume that the appropriate action will be taken, prior to the offer
and sale of the Shares in accordance with the Underwriting Agreement, to
register and qualify the Shares for sale under all applicable state securities
or "blue sky" laws.

     We express no opinion herein as to the laws of any state or jurisdiction
other than the state laws of the Commonwealth of Massachusetts, the Delaware
General Corporation Law statute and the federal laws of the United States of
America.

     Based upon and subject to the foregoing, we are of the opinion that (i)
the Shares to be issued and sold by the Company have been duly authorized for
issuance and, when such Shares are issued and paid for in accordance with the
terms and conditions of the Underwriting Agreement, such Shares will be validly
issued, fully paid and nonassessable and (ii) the Shares to be sold by the
Selling Stockholders have been duly authorized and are validly issued, fully
paid and nonassessable.

     It is understood that this opinion is to be used only in connection with
the offer and sale of the Shares while the Registration Statement is in effect.

     Please note that we are opining only as to the matters expressly set forth
herein, and no opinion should be inferred as to any other matters.

     We hereby consent to the filing of this opinion with the Commission as an
exhibit to the Registration Statement in accordance with the requirements of
Item 601(b)(5) of Regulation S-K under the Securities Act and to the use of our
name therein and in the related Prospectus under the caption "Legal Matters."
In giving such consent, we do not hereby admit that we are in the category of
persons whose consent is required under Section 7 of the Securities Act or the
rules and regulations of the Commission.

                                   Very truly yours,

                                   /s/ HALE AND DORR LLP