UNITED STATES
                       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) : February 25, 2006


                               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)

  Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

[  ] Written  communications  pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

[x]  Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[  ] Pre-commencement  communications  pursuant  to Rule  14d-2(b)  under the
     Exchange Act (17 CFR 240.14d-2(b))

[  ] Pre-commencement  communications  pursuant  to  Rule  13e-4(c)  under  the
     Exchange Act (17 CFR 240.13.e-4(C))





Cautionary Language Concerning Forward-Looking Statements
- ---------------------------------------------------------

     Certain statements contained herein are forward-looking  statements,  which
reflect  numerous  assumptions  and  estimates and involve a number of risks and
uncertainties.  For these statements, we claim the protection of the safe harbor
for  forward-looking  statements  provided by the Private Securities  Litigation
Reform Act of 1995.

     There are  possible  developments  that could  cause our actual  results to
differ  materially  from  those  forecast  or  implied  in  the  forward-looking
statements.   You  are   cautioned   not  to  place  undue   reliance  on  these
forward-looking  statements,  which  are  current  only  as of the  date of this
filing.  We  disclaim  any  intention  or  obligation  to update  or revise  any
forward-looking  statements,  whether  as a result  of new  information,  future
events or otherwise.

     Among the factors that could cause actual results to differ materially are:
general  economic  conditions,   especially  in  the  Northeast  United  States;
available sources and cost of fuel; volatility of energy prices in a deregulated
market  environment  as well as in the  source of  natural  gas and fuel used to
generate  electricity;  potential  write-down  of our  investment in natural gas
properties  when  natural  gas prices are  depressed  or if we have  significant
downward  revisions  in our  estimated  proved gas  reserves;  federal and state
regulatory  initiatives that increase competition,  threaten cost and investment
recovery,  and impact rate  structures;  our ability to successfully  reduce our
cost structures; implementation of new accounting standards; the degree to which
the we develop  unregulated  business  ventures;  as well as  federal  and state
regulatory  policies  affecting our ability to retain and operate those business
ventures; our ability to identify and make complementary  acquisitions,  as well
as the successful  integration of those  acquisitions;  inflationary  trends and
interest rates; and risks detailed from time to time in reports filed by us with
the Securities and Exchange Commission.

Important Information
- ---------------------

     In  connection  with the  proposed  merger  discussed  below in Item  8.01,
KeySpan  Corporation  (the  "Company")  will  file a proxy  statement  with  the
Securities and Exchange  Commission.  INVESTORS AND SECURITY HOLDERS ARE ADVISED
TO READ THE  PROXY  STATEMENT  WHEN IT  BECOMES  AVAILABLE,  AS IT WILL  CONTAIN
IMPORTANT INFORMATION.  Investors and security holders may obtain a free copy of
the proxy statement, when available, and other documents filed by the Company at
the Securities and Exchange Commission's web site at http:/www.sec.gov.

     The Company and its directors,  executive officers and other members of its
management and employees may be deemed to be participants in the solicitation of
proxies  from  its   stockholders  in  connection  with  the  proposed   merger.
Information  concerning  the  interests  of the  Company's  participants  in the
solicitation  is set forth in the Company's proxy statement and Annual Report on
Form 10-K filed (filed with the Securities and Exchange  Commission on March 30,
2005 and  March  2,  2005,  respectively)  and  will be set  forth in the  proxy
statement relating to the merger when it becomes available.

Item 8.01.        Other Events.

     On February 27, 2006, the Company issued a press release announcing that it
has entered into an Agreement and Plan of Merger. The Company's press release is
attached hereto as Exhibit 99.1 and is incorporated herein by reference.



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Item 9.01.        Financial Statements and Exhibits.

         (c) Exhibits.

               (1)  Press Release of the Company dated February 27, 2006









                                   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: February 27, 2006       By:  /s/John J. Bishar, Jr.
                               ---------------------------
                               Name:  John J. Bishar, Jr.
                               Title: Executive Vice President, General Counsel,
                                      Chief Governance Officer and Secretary






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                                INDEX TO EXHIBITS


Exhibit No.      Exhibit                                                   Page
- -----------      -------                                                   ----

     99.1        Press Release of the Company dated February 27, 2006.      5









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