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: December 2, 1999)


                               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)

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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 consolidated  financial statements of the Company for
each of the nine months ended  December 31, 1998,  the twelve months ended March
31,  1998,  the three  months  ended March 31, 1997 and the twelve  months ended
December  31,  1996  (the  "Company's  Financial  Statements").   THE  COMPANY'S
FINANCIAL  STATEMENTS,  WHICH  INCLUDE THE  OPINIONS OF ARTHUR  ANDERSEN LLP AND
ERNST & YOUNG LLP, THE  COMPANY'S  CURRENT AND FORMER  INDEPENDENT  ACCOUNTANTS,
RESPECTIVELY,  ARE IDENTICAL TO THE CORRESPONDING FINANCIAL STATEMENTS CONTAINED
IN THE  COMPANY'S  TRANSITION  REPORT  ON FORM  10-K FOR THE NINE  MONTHS  ENDED
DECEMBER  31, 1998,  EXCEPT THAT A NEW NOTE ,  CONTAINING  SUMMARIZED  FINANCIAL
INFORMATION  FOR  KEYSPAN  GAS EAST  CORPORATION  D/B/A  BROOKLYN  UNION OF LONG
ISLAND, A WHOLLY OWNED SUBSIDIARY OF THE COMPANY  ("BULI"),  HAS BEEN ADDED. The
Company's Financial Statements are hereby incorporated herein by reference.

     Exhibit 99.2 contains unaudited condensed consolidated financial statements
of the Company  for the nine months  ended  September  30, 1999 (the  "Company's
Nine-  Month  Financial   Statements").   THE  COMPANY'S   NINE-MONTH  FINANCIAL
STATEMENTS ARE IDENTICAL TO THE CORRESPONDING  FINANCIAL STATEMENTS CONTAINED IN
THE  COMPANY'S  QUARTERLY  REPORT ON FORM 10-Q FOR THE  QUARTERLY  PERIOD  ENDED
SEPTEMBER  30, 1999,  EXCEPT THAT A NEW NOTE,  CONTAINING  SUMMARIZED  FINANCIAL
INFORMATION  FOR  BULI,  HAS BEEN  ADDED.  The  Company's  Nine-Month  Financial
Statements are hereby incorporated herein by reference.


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Item 7.        Financial Statements and Exhibits.

      (c)Exhibits

     Exhibit 23.1 Consent of Arthur Andersen LLP

     Exhibit 23.2 Consent of Ernst & Young LLP

     Exhibit 99.1 Consolidated  financial  statements of the Company for each of
          the nine months ended December 31, 1998, the twelve months ended March
          31, 1998,  the three months ended March 31, 1997 and the twelve months
          ended December 31, 1996

     Exhibit99.2 Unaudited condensed  consolidated  financial  statements of the
                 Company for the nine months ended September 30, 1999







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                               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: December 1, 1999       By:/s/ Gerald Luterman
                              --------------------------
                              Name: Gerald Luterman
                              Title:Senior Vice President and
                              Chief Financial Officer


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                            INDEX TO EXHIBITS



Exhibit No.   Exhibit                                                     Page
23.1          Consent of Arthur Andersen LLP                               6

23.2          Consent of Ernst & Young LLP                                 7

99.1          Consolidated financial statements of the Company for each    8
              of the nine months ended December 31, 1998, the twelve
              months ended March 31, 1998, the three months ended
              March 31, 1997 and the twelve months ended December 31,
              1996

99.2          Unaudited condensed consolidated financial statements of     55
              the Company for the nine months ended September 30,
              1999

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