Exhibit 10(iv)

                                FIRST AMENDMENT
                                OF THE RESTATED
                          NORTHERN TRUST CORPORATION
                           SUPPLEMENTAL PENSION PLAN

         WHEREAS, the Northern Trust Corporation (the "Corporation") sponsors
the Restated Northern Trust Corporation Supplemental Pension Plan (the "Plan");
and

         WHEREAS, pursuant to Section 6.1 of the Plan, the Corporation has the
right to amend the Plan when the Corporation deems such amendment to be
advisable; and

         WHEREAS, the Corporation deems it advisable to amend the Plan;

         NOW, THEREFORE, the Plan is hereby amended as follows:

         1.    Section 1.4 of the Plan is hereby amended and restated in its
               entirety and replaced with a new Subsection 1.4 to read as
               follows:

               A "Change in Control" shall be deemed to have occurred if the
event set forth in any one of the following paragraphs shall have occurred:

               (1)  any Person is or becomes the Beneficial Owner, directly or
               indirectly, of securities of Northern Trust Corporation (the
               "Corporation") (not including in the securities beneficially
               owned by such Person any securities acquired directly from the
               Corporation or its affiliates) representing 20% or more of the
               combined voting power of the Corporation's then outstanding
               securities, excluding any Person who becomes such a Beneficial
               Owner in connection with a transaction described in clause (i) of
               paragraph (3) below; or

               (2) The election to the Board of Directors of the Corporation,
               without the recommendation or approval of two thirds of the
               incumbent Board of Directors of the Corporation, of the lesser
               of: (A) three directors; or (B) directors constituting a majority
               of the number of directors of the Corporation then in office,
               provided, however, that directors whose initial assumption of
               --------  -------
               office is in connection with an actual or threatened election
               contest, including but not limited to a consent


               solicitation, relating to the election of directors of the
               Corporation will not be considered as incumbent members of the
               Board of Directors of the Corporation for purposes of this
               section; or

               (3)  there is consummated a merger or consolidation of the
               Corporation or any direct or indirect subsidiary of the
               Corporation with any other company, other than (i) a merger or
               consolidation which would result in the voting securities of the
               Corporation outstanding immediately prior to such merger or
               consolidation continuing to represent (either by remaining
               outstanding or by being converted into voting securities of the
               surviving entity or any parent thereof), at least 60% of the
               combined voting power of the securities of the Corporation or
               such surviving entity or any parent thereof out standing
               immediately after such merger or consolidation, or (ii) a merger
               or consolidation effected to implement a recapitalization of the
               Corporation (or similar transaction) in which no Person is or
               becomes the Beneficial Owner, directly or indirectly, of
               securities of the Corporation (not including in the securities
               Beneficially Owned by such Person any securities acquired
               directly from the Corporation or its Affiliates) representing 20%
               or more of the combined voting power of the Corporation's then
               outstanding securities; or

               (4)  the stockholders of the Corporation approve a plan of
               complete liquidation or dissolution of the Corporation or there
               is consummated an agreement for the sale or disposition by the
               Corporation of all or substantially all of the Corporation's
               assets, other than a sale or disposition by the Corporation of
               all or substantially all of the Corporation's assets to an
               entity, at least 60% of the combined voting power of the voting
               securities of which are owned by stockholders of the Corporation
               in substantially the same proportions as their ownership of the
               Corporation immediately prior to such sale.

         Notwithstanding the foregoing, a "Change in Control" shall not be
         deemed to have occurred by virtue of the consummation of any
         transaction or series of integrated transactions immediately following
         which the record holders of the common stock of the Corporation
         immediately prior to such transaction or series of transactions
         continue to have substantially the same proportionate ownership in an
         entity which owns all or substantially all of the assets of the
         Corporation immediately following such transaction or series of
         transactions.

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         For purposes of this Section 1.4 and 1.21 (where applicable) the
following definitions shall apply:

         "Affiliate" shall have the meaning set forth in Rule 12b-2 under
         Section 12 of the Exchange Act; "Beneficial Owner" shall have the
         meaning set forth in Rule 13d-3 under the Exchange Act, except that a
         Person shall not be deemed to be the Beneficial Owner of any securities
         with respect to which such Person has properly filed a Form 13-G;
         "Exchange Act" shall mean the Securities Exchange Act of 1934, as
         amended from time to time; and "Person" shall have the meaning given in
         Section 3(a)(9) of the Exchange Act, as modified and used in Sections
         13(d) and 14(d) thereof, except that such term shall not include (i)
         the Corporation or any of its Affiliates, (ii) a trustee or other
         fiduciary holding securities under an employee benefits plan of the
         Corporation or any of its subsidiaries, (iii) an underwriter
         temporarily holding securities pursuant to an offering of such
         securities or (iv) a corporation owned, directly or indirectly, by the
         stockholders of the Corporation in substantially the same proportions
         as their ownership of stock of the Corporation.

         2.   Article 1 is amended by redesignating Section 1.21 as Section
              1.22.

         3.   Article 1 is amended by adding the following new Section 1.21
              thereto:

              A "Potential Change in Control" shall be deemed to have
         occurred if the event set forth in any one of the following paragraphs
         shall have occurred:

              (a)  the Corporation enters into an agreement, the consummation of
              which would result in the occurrence of a Change in Control;

              (b)  the Corporation or any Person publicly announces an intention
              to take or to consider taking actions which, if consummated, would
              constitute a Change in Control;

              (c)  any Person becomes the Beneficial Owner, directly or
              indirectly, of securities of the Corporation representing 15% or
              more of either the then outstanding shares of common stock of the
              Corporation or the combined voting power of the Corporation's then
              outstanding

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              securities (not including in the securities beneficially owned by
              such Person any securities acquired directly from the Corporation
              or its Affiliates); or

              (d)  the Board adopts a resolution to the effect that, for
              purposes of this Plan, a Potential Change in Control has occurred.

         4.   Section 3.2 is hereby amended by deleting the second sentence
              thereof.

         5.   Section 6.1 is hereby amended by adding the following new sentence
              after the last sentence thereof:

              Notwithstanding the foregoing, (i) for a period of two years after
              the date of an occurrence of a Change in Control or (ii) in the
              event of a Potential Change in Control and for a period of six (6)
              months following the Potential Change in Control, neither the
              Board nor the Committee may terminate this Plan or amend this Plan
              in a manner that adversely affects the rights of any Participant
              of the Plan. In addition, after the date of the occurrence of a
              Change in Control, no amendment of Sections 3.4 or 4.2 of the Plan
              shall be effective with respect to any Participant who is a
              Participant as of the occurrence of a Change in Control without
              the consent of such Participant.

         This First Amendment to the Plan shall be effective from and after May
16, 2000.

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         IN WITNESS WHEREOF, the Corporation has caused this amendment to be
executed on its behalf as of this 16/th/ day of May, 2000.



                                                 NORTHERN TRUST CORPORATION



                                                 By: /s/ Peter L. Rossiter
                                                     ---------------------
                                                 Name: Peter L. Rossiter
                                                 Title: Executive Vice President

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