Document:

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                                                                 Exhibit (10)(i)

                           AMENDMENT NUMBER THIRTEEN
                                    TO THE
                            NORTHERN TRUST EMPLOYEE
                             STOCK OWNERSHIP PLAN

     WHEREAS, The Northern Trust Company (the "Company") maintains the Northern
Trust Employee Stock Ownership Plan, as amended and restated effective
January 1, 1989 (as further amended, the "Plan"); and

     WHEREAS, amendment of the Plan is now considered desirable;

     NOW, THEREFORE, by virtue and in exercise of the amending power reserved to
the Company under Section 13.1 of the Plan, and pursuant to the authority
delegated to the undersigned officer by resolution of the Board of Directors
dated September 25, 2001 the Plan is hereby amended, effective September 25,
2001, in the following particulars:

     1.   The definition of "Change in Control" set forth in Section 16.11 is
          hereby amended and restated in its entirety, 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 threat-
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          ened 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 outstanding 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 the foregoing, 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.

          IN WITNESS WHEREOF, the Company has caused this amendment to be
executed on its behalf as of this 25th day of September, 2001.

                                              THE NORTHERN TRUST COMPANY

                                              By: /s/ Marty J. Joyce, Jr.
                                                  -------------------------
                                              Name:   Marty J. Joyce, Jr.
                                              Title:  Senior Vice President

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                                                                Exhibit (10)(ii)

                                SECOND 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.  A new Section 1.9(d) shall be added to the Plan, as follows:

     (d) In the event the Participant is entitled to additional age and/or
     service credit under the Plan pursuant to an Employment Security Agreement,
     such additional credit will be taken into account in calculating the
     Modified Pension Benefit only for purposes of determining whether the
     Participant is treated as having attained Early Retirement Age or Normal
     Retirement Age, and shall not otherwise affect the calculation of the
     Participant's Modified Pension Benefit. If, as a result of such additional
     credit, the Participant is treated as having attained Early Retirement Age,
     the reduction in the Accrued Benefit for early commencement will equal 1/2
     of 1% for each month the Participant's benefit commencement date under the
     Plan precedes his or her attainment of age 62 (without regard to any such
     additional age credit).

     This Second Amendment to the Plan shall be effective from and after
September 25, 2001.

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     IN WITNESS WHEREOF, the Corporation has caused this amendment to be
executed on its behalf as of this September 25, 2001.

                                  NORTHERN TRUST CORPORATION

                                  By: /s/ Marty J. Joyce, Jr.
                                      ---------------------------
                                  Name:  Marty J. Joyce, Jr.
                                  Title: Senior Vice President

                                       2<PAGE>

                                                               Exhibit (10)(iii)

                                 AMENDMENT TO
                        THE NORTHERN TRUST CORPORATION
                       AMENDED 1992 INCENTIVE STOCK PLAN

     WHEREAS, Northern Trust Corporation (the "Corporation") maintains the
Northern Trust Corporation Amended 1992 Incentive Stock Plan (as amended, the
"Plan"); and

     WHEREAS, amendment of the Plan is now considered desirable;

     NOW, THEREFORE, by virtue and in exercise of the amending power reserved to
the Board of Directors of the Corporation under Section 15 of the Plan, the Plan
is hereby amended, effective September 25, 2001 in the following particulars:

          1.   The introductory clause of the second sentence of Section 6(g)
               shall be restated in its entirety as follows:

               "For purposes of Stock Options granted prior to September 25,
               2001, a "Change in Control" of the Corporation shall be deemed to
               occur on the earliest of:"

     2.   Section 6(h) of the Plan shall be re-designated as Section 6(i) of the
          Plan, and the following new Section 6(h) shall be added to the Plan:

     (h)  For purposes of Stock Options granted on or following September 25,
          2001, a "Change in Control" of the Corporation shall be deemed to have
          occurred if the event set forth in any one of the following paragraphs
          shall have occurred:

               (i)  any 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, excluding any Person
               who becomes such a Beneficial Owner in connection with a
               transaction described in clause (A) of paragraph (iii) below; or
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               (ii)  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

               (iii)  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 (A) 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 outstanding
               immediately after such merger or consolidation, or (B) 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

               (iv)  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

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     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.

     For purposes of the Change in Control definition set forth in this Section
     6(h), 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.

     IN WITNESS WHEREOF, the Corporation has caused this amendment to be
executed on its behalf as of this 25th day of September, 2001.

                                  NORTHERN TRUST CORPORATION

                                  By:  /s/ William A. Osborn
                                     -----------------------
                                  Name:   William A. Osborn
                                  Title:  Chairman
                                          and Chief Executive Officer

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