As filed with the Securities and Exchange Commission on April 1, 2003 Registration No. 333-______ ============================================================================== SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 KeySpan Corporation New York 11-3431358 (Exact Name of Registrant as (State or Other Jurisdiction of (I.R.S. Employer Specified in its Charter) Incorporation or Organization) Identificaiton Number) --------------------------- Steven L. Zelkowitz, Esq. One MetroTech Center, Brooklyn, New York 11201 175 East Old Country Road, Hicksville, New York 11801 (718) 403-1000 (Brooklyn) (516) 755-6650 (Hicksville) (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices and agent for service) Copy to: William R. Dougherty, Esq. Simpson Thacher & Bartlett 425 Lexington Avenue New York, New York 10017-3954 -------------------------- Approximate date of commencement of proposed sale to public: From time to time after this Registration Statement becomes effective as determined by market conditions. 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. /x/ 333-82230 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. / / -------------------------- CALCULATION OF REGISTRATION FEE (See following page) -------------------------- CALCULATION OF REGISTRATION FEE ============================================================================== Proposed Maximum Title of Each Class Aggregate Offering Proposed Maximum Amount of of Securities to Amount to be Price Per Aggregate Offering Registration be Registered Registered Security (1) Price (2)(3)(4) Fee - ------------------------------------------------------------------------------- Senior Debt Securities of KeySpan Corporation (4) $25,000,000 $25,000,000 $2,023 ============================================================================== (1) The Proposed Maximum Aggregate Offering Price Per Security will be determined from time to time by the Registrant in connection with the issuance by the Registrant of the securities registered hereunder. (2) The Proposed Maximum Aggregate Offering Price has been estimated solely for purposes of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933 and reflects the maximum offering price of securities issued, rather than the principal amount of securities that may be issued at a discount, and shall not exceed $25,000,000 or the equivalent thereof, based on the exchange rate on the applicable offering date, in one or more currencies or currency units identified by the Registrant at the time of offering. (3) Excluding accrued interest, distributions and dividends, if any. (4) An indeterminate number of senior debt securities of KeySpan Corporation are covered by this registration statement. ============================================================================== EXPLANATORY NOTE This Registration Statement is being filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended. The contents of the Registration Statement on Form S-3 (Reg. No. 333-82230) filed by KeySpan Corporation with the Securities and Exchange Commission are incorporated herein by reference. 1 SIGNATURES Pursuant to the requirements of the Securities Act of 1933, KeySpan Corporation 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 registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Brooklyn, State of New York, on this 1st day of April, 2003. KEYSPAN CORPORATION Issuer of Securities (Registrant) By:/s/ Gerald Luterman ------------------------ Gerald Luterman Chief Financial Officer and Executive Vice-President (Principal Financial Officer) Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed below by the following persons in the capacities and on the dates indicated. Date: * April 1, 2003 - ----------------------------------------------------------- Robert B. Catell Chief Executive Officer and Director (Principal Executive Officer) /s/ Gerald Luterman April 1, 2003 - ----------------------------------------------------------- Gerald Luterman Chief Financial Officer and Executive Vice-President (Principal Financial Officer) /s/ Theresa Balog April 1, 2003 - ----------------------------------------------------------- Theresa Balog Vice President and Controller (Controller) * April 1, 2003 - ----------------------------------------------------------- Andrea S. Christensen Director * April 1, 2003 - ----------------------------------------------------------- Donald H. Elliott Director * April 1, 2003 - ----------------------------------------------------------- J. Atwood Ives Director * April 1, 2003 - ----------------------------------------------------------- James R. Jones Director * April 1, 2003 - ----------------------------------------------------------- James L. Larocca Director * April 1, 2003 - ----------------------------------------------------------- Stephen W. McKessy Director * April 1, 2003 - ----------------------------------------------------------- Edward Travaglianti Director *By: /s/ Michael Taunton ---------------------------------------------------- April 1, 2003 Michael Taunton, as Attorney-in-Fact EXHIBIT INDEX 5.1 Opinion of Simpson Thacher & Bartlett as to the validity of the senior debt securities 8.1 Opinion of Simpson Thacher & Bartlett regarding certain tax matters (filed as Exhibit 8.1 to KeySpan Corporation's registration statement on Form S-3 (file no. 333-82230) on February 6, 2002 and incorporated herein by reference) 23.1 Consent of Simpson Thacher & Bartlett (included in Exhibit 5.1) 23.2 Consent of Deloitte & Touche LLP 23.3 Consent of Simpson Thacher & Bartlett 24.1 Powers of Attorney