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) : May 4, 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))









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

     Certain statements contained herein are "forward-looking statements" within
the meaning of Section 21E of the Securities  Exchange Act of 1934, as amended.,
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:
the  occurrence  or impact  of the  potential  merger  with  National  Grid plc;
volatility  of energy  prices  used to  generate  electricity;  fluctuations  in
weather and in gas and electric prices; general economic conditions,  especially
in the Northeast  United  States;  our ability to  successfully  manage our cost
structure  and operate  efficiently;  our ability to  successfully  contract for
natural gas supplies required to meet the needs of our customers; implementation
of new accounting standards or changes in accounting standards or GAAP which may
require  adjustments to financial  statements;  inflationary trends and interest
rates; the ability of KeySpan to identify and make  complementary  acquisitions,
as well as the successful  integration of such  acquisitions;  available sources
and cost of fuel;  creditworthiness of counterparties to derivative  instruments
and commodity  contracts;  the  resolution of certain  disputes with Long Island
Power Authority  ("LIPA")  concerning each party's rights and obligations  under
various  agreements;  retention of key personnel;  federal and state  regulatory
initiatives that threaten cost and investment recovery,  and place limits on the
type and manner in which we invest in new businesses and conduct operations; the
impact of federal, state and local utility regulatory policies,  legislation and
orders on our regulated and unregulated businesses;  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;
competition  facing our unregulated  Energy Services  businesses;  the degree to
which we develop unregulated  business ventures,  as well as federal,  state and
local  regulatory  policies  affecting  our ability to retain and  operate  such
business ventures profitably; a change in the fair value of our investments that
could cause a significant  change in the carrying  value of such  investments or
the carrying value of related goodwill; timely receipts of payments from our two
largest  customers LIPA and the New York Independent  System Operator changes in
the UCAP pricing  structure;  timing of the approval of the 2006 LIPA Agreements
and; other risks detailed from time to time in other reports and other documents
filed by KeySpan with the Securities and Exchange Commission.


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Item 2.02.     Results of Operations and Financial Condition.
               ----------------------------------------------

On May 4, 2006,  KeySpan  Corporation  ("the  Company")  issued a press  release
concerning,  among other things, its first quarter results.  The Company's press
release is attached hereto as Exhibit 99.1 and incorporated herein by reference.

The Company will also host a conference call at 10:30 A.M. EST on May 4, 2006 to
discuss its first quarter results. The script of the earnings conference call is
attached hereto as Exhibit 99.2 and incorporated herein by reference.










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Item 9.01.     Financial Statements and Exhibits.
               ----------------------------------

          (c)  Exhibits.

               1)   Press Release of the Company dated May 4, 2006

               2)   Script of Earnings Conference Call











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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: May 4, 2006                       By:  /s Gerald Luterman
                                              ----------------------------------
                                              Name:  Gerald Luterman
                                              Title: Executive Vice President
                                                     and Chief Financial Officer









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                                INDEX TO EXHIBITS
                                -----------------


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

     99.1             Press Release dated May 4,2006                       8

     99.2             Script of Earnings Conference Call                   16

















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