SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported) : July 12, 2000 KEYSPAN CORPORATION (Exact Name of Registrant as Specified in Its Charter) New York (State or Other Jurisdiction of Incorporation) 1-14161 11-3431358 (Commission File Number) (IRS Employer Identification No.) 175 East Old Country Road, Hicksville, New York 11801 One MetroTech Center, Brooklyn, New York 11201 (Address of Principal Executive Offices) (Zip Code) (516) 755-6650 (Hicksville) (718) 403-1000 (Brooklyn) (Registrant's Telephone Number, Including Area Code) N/A (Former Name or Former Address, if Changed Since Last Report) Item 5. Other Events. ------------ KeySpan Corporation (the "Company") is making this filing to include the exhibits hereto by means of incorporation by reference into the Company's filings under the Securities Act of 1933, as amended. Exhibit 99.1 contains the unaudited pro forma consolidated condensed income statement of a combined KeySpan Corporation ("KeySpan Energy"), Eastern Enterprises ("Eastern") and EnergyNorth Inc. ("EnergyNorth") as of December 31, 1999. Exhibit 99.2 contains the unaudited pro forma consolidated condensed balance sheet, income statement and related notes of a combined KeySpan Energy, Eastern and EnergyNorth for the for the three months ended March 31, 2000. Item 7. Financial Statements and Exhibits. --------------------------------- (c) Exhibits Exhibit 99.1 Unaudited pro forma consolidated condensed income statement of a combined KeySpan Energy, Eastern and EnergyNorth as of December 31, 1999. Exhibit 99.2 Unaudited pro forma consolidated condensed balance sheet, income statement and related notes of a combined KeySpan Energy, Eastern and EnergyNorth for the three months ended March 31, 2000. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. KEYSPAN CORPORATION Dated: July 12, 2000 By: /s/Gerald Luterman ---------------------- Name: Gerald Luterman Title: Senior Vice President and Chief Financial Officer INDEX TO EXHIBITS Exhibit No. Exhibit Page - ----------- ------- ---- 99.1 Unaudited pro forma consolidated condensed income statement of a combined KeySpan Energy, Eastern and EnergyNorth as of December 31, 1999. 99.2 Unaudited pro forma consolidated condensed balance sheet, income statement and related notes of a combined KeySpan Energy, Eastern and EnergyNorth for the three months ended March 31, 2000.