1 Exhibit 4.11 AGREEMENT AGREEMENT (this "Agreement"), dated as of October 29, 1997, between Southbrook International Investments, Ltd., a corporation organized and existing under the laws of the British Virgin Islands ("Southbrook"), Brown Simpson Strategic Growth Fund, LP, a limited partnership existing under the laws of Delaware ("Brown Simpson"), and Illinois Superconductor Corporation, a corporation organized and existing under the laws of Delaware (the "Company"). WHEREAS, Southbrook and the Company entered into a Convertible Preferred Stock Purchase Agreement, dated as of June 6, 1997 (the "Purchase AGreement"), providing for, among other things, the issuance and sale to Southbrook of shares of its Series C Convertible Preferred Stock (the "Series C Stock") and a registration rights agreement, dated as of June 6, 1997 (the "Registration Rights Agreement"), with respect to the registration of the Series C Stock, among other things; WHEREAS, the parties desire to modify the terms of the Purchase Agreement and the Registration Rights Agreement as follows: 1. Capitalized terms used and not otherwise deffined herein shall have the respective meanings set forth in the Purchase Agreement. 2. Notwithstanding anything to the contrary contained in the Purchase Agreement, the parties agree that shares of Series C Stock shall be issued in consideration for the purchase price per share of $5,000 as follows: (a) The Company shall issue to Southbrook two-hundred, ninety (290) shares registered in the name of Southbrook of Series C Stock on the closing date for the transactions contemplated hereby; and (b) The Company shall issue to Brown Simpson ten (10) shares of Series C Stock registered in the name of Brown Simpson (the "Brown Simpson Shares"). 3. Brown Simpson hereby represents and warrants to the Company as follows: (a) Brown Simpson is acquiring the Brown Simpson Shares and the Underlying Shares relating thereto for its own account for investment purposes only and not with a view to or for distributing or reselling such Brown Simpson Shares or Underlying Shares or any part thereof or interest therein, without prejudice, however, to Brown Simpson's right, subject to the provisions of the Purchase Agreement, at all times to sell or otherwise to dispose of all or any part of the Brown Simpson Shares and the Underlying Shares pursuant to an effective registration statement under the Securities Act and in compliance with applicable State securites laws or under an exemption from such registration. 2 (b) At the time Brown Simpson was offered the Brown Simpson Shares, it was, and at the date hereof, it is, an "accredited investor", as defined in Rule 501(a):(1), (2), (3) or (7) under the Securities Act. (c) Brown Simpson, either alone or together with its representatives, has such knowledge, sophistication and experience in business and financial matters so as to be capable of evaluating the merits and risks of the prospective investment in the Brown Simpson Shares and the Underlying Shares, and has so evaluated the merits and risks of such investment. (d) Brown Simpson is able to bear the economic risk of an investment in the Brown Simpson Shares and the Underlying Shares and, at the present time, is able to afford a complete loss of such investment. (e) The Brown Simpson Shares to be purchased by Brown Simpson are not being acquired, directly or indirectly, with the assets of any "employee benefit plan," within the meaning of Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended. (f) Brown Simpson acknowledges that it has been afforded (i) the opportunity to ask such questions as it has deemed necessary of, and to receive answers from representatives of the Company concerning the terms and conditions of the offering of the Brown Simpson Shares; (ii) access to information about the Company and the Company's financial condition, results of operations, business, properties, management and prospects sufficient to enable it to evaluate its investment; and (iii) the opportunity to obtain such additional information which the Company possesses or can acquire without unreasonable effort or expense that is necessary to make an informed investment decision with respect to the investment and to verify the accuracy and completeness of the information contained in the Disclosure Materials. (g) Brown Simpson understands and acknowledges that (i) the Brown Simpson Shares are being offered and sold to it without registration under the Securities Act in a private placement that is exempt from the registration provisions of the Securities Act under Regulation D promulgated thereunder and (ii) the availability of such exemption depends in part on, and the Company will rely upon the accuracy and truthfulness of, the foregoing representations and Brown Simpson hereby consents to such reliance. 4. Brown Simpson and the Company agree to comply with the terms and conditions of Section 3.1 of the Purchase Agreement with respect to the Brown Simpson Shares and the Underlying Shares. 5. Brown Simpson shall be deemed a party to the Registration Rights Agreement solely with respect to the registration of the Underlying Shares issuable upon conversion of the Brown Simpson Shares issued to Brown Simpson hereunder. -2- 3 6. Except as modified herein, the Purchase Agreement and the Registration Rights Agreement shall remain in full force and effect. 7. The address for notice to Brown Simpson is 152 West 57th Street, 4th Floor, New York, New York 10019, Attn: Matthew C. Brown. IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their respective authorized person as of the date first indicated above. ILLINOIS SUPERCONDUCTOR CORPORATION By: /s/ Stephen G. Wasko ------------------------------ Name: Stephen G. Wasko Title: Senior Vice President & Chief Financial Officer SOUTHBROOK INTERNATIONAL INVESTMENTS, LTD. By: /s/ Kenneth Henderson ------------------------------ Kenneth L. Henderson Assistant Secretary BROWN SIMPSON STRATEGIC GROWTH FUND, LP By: /s/ MCB ------------------------------ Name: Title: -3-