NORTHERN TRUST CORP
10-Q, 1997-08-13
STATE COMMERCIAL BANKS
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<PAGE>

================================================================================



               UNITED STATES SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20549

                            ---------------------- 

                                   FORM 10-Q


          [X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934

                 For the Quarterly Period Ended June 30, 1997

                                      OR

           [_] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                      THE SECURITIES EXCHANGE ACT OF 1934

                 For the transition period from__________to_________

                         Commission File Number 0-5965


                          NORTHERN TRUST CORPORATION
            (Exact name of registrant as specified in its charter)


                      DELAWARE                            36-2723087
            (State or other jurisdiction of            (I.R.S. Employer
             incorporation or organization)           Identification No.)

                 50 SOUTH LA SALLE STREET  
                 CHICAGO, ILLINOIS                           60675
          (Address of principal executive offices)         (Zip Code)

       Registrant's telephone number, including area code: (312)630-6000

                            ---------------------- 

     Indicate by check mark whether the registrant (1) has filed all reports
     required to be filed by Section 13 or 15(d) of the Securities Exchange Act
     of 1934 during the preceding 12 months (or for such shorter period that the
     registrant was required to file such reports), and (2) has been subject to
     such filing requirements for the past 90 days.    Yes  X   No    
                                                           ---     --- 
          
          
                   111,679,056 Shares - $1.66 2/3 Par Value
             (Shares of Common Stock Outstanding on June 30, 1997)



================================================================================

<PAGE>
         
         
                        PART I - FINANCIAL INFORMATION
<TABLE> 
<CAPTION>
Item.1 Financial Statements
CONSOLIDATED BALANCE SHEET                                                                      NORTHERN TRUST CORPORATION

                                                                                               June 30   December 31   June 30
                                                                                            ----------   -----------   -------      
($ In Millions)                                                                                   1997          1996      1996  
- -------------------------------------------------------------------------------------       ----------   -----------   -------
<S>                                                                                         <C>          <C>           <C>  
Assets
Cash and Due from Banks                                                                      $ 1,791.6     $ 1,292.5    $ 1,232.9 
Federal Funds Sold and Securities Purchased under Agreements to Resell                         1,919.9       1,022.6        361.3 
Time Deposits with Banks                                                                       1,945.8       2,060.0      1,905.4
Other Interest-Bearing                                                                            75.6         114.3         78.5
Securities
  Available for Sale                                                                           6,556.1       4,311.7      5,795.9
  Held to Maturity (Fair value - $491.8 at June 1997, $518.9 at 
   December 1996, $523.9 at June 1996)                                                           474.0         498.4        504.1
  Trading Account                                                                                  5.8           4.8          3.3 
- -------------------------------------------------------------------------------------        ---------     ---------    ---------
Total Securities                                                                               7,035.9       4,814.9      6,303.3
- -------------------------------------------------------------------------------------        ---------     ---------    ---------
Loans and Leases
  Commercial and Other                                                                         7,097.0       6,379.9      6,104.4 
  Residential Mortgages                                                                        4,861.1       4,557.5      4,300.8
- -------------------------------------------------------------------------------------        ---------     ---------    ---------
Total Loans and Leases (Net of unearned income - $126.4 at June 1997, $109.1 at 
 December 1996, $91.1 at June 1996)                                                           11,958.1      10,937.4     10,405.2
- -------------------------------------------------------------------------------------        ---------     ---------    ---------
Reserve for Credit Losses                                                                       (148.4)       (148.3)      (147.4)
Buildings and Equipment                                                                          312.0         291.5        289.2
Customers' Acceptance Liability                                                                   41.3          44.7         34.0
Trust Security Settlement Receivables                                                            254.9         362.3        382.8
Other Assets                                                                                     864.3         816.4        906.0
- -------------------------------------------------------------------------------------        ---------     ---------    ---------   
Total Assets                                                                                 $26,051.0     $21,608.3    $21,751.2
- -------------------------------------------------------------------------------------        ---------     ---------    ---------
Liabilities
Deposits
  Demand and Other Noninterest-Bearing                                                       $ 3,809.6     $ 3,476.7    $ 2,892.6
  Savings and Money Market Deposits                                                            3,918.1       3,880.1      3,689.6
  Savings Certificates                                                                         2,034.8       2,056.3      2,063.6
  Other Time                                                                                     857.6         462.7        456.7
  Foreign Offices - Demand                                                                       543.3         410.7        382.4
                  - Time                                                                       4,727.7       3,509.7      3,782.9
- -------------------------------------------------------------------------------------        ---------     ---------    ---------  
Total Deposits                                                                                15,891.1      13,796.2     13,267.8
Federal Funds Purchased                                                                          621.1         653.0      1,096.0
Securities Sold Under Agreements to Repurchase                                                 1,059.2         966.1      1,699.0
Commercial Paper                                                                                 149.4         149.0        144.2
Other Borrowings                                                                               4,654.4       3,142.1      3,077.2
Senior Notes                                                                                     655.0         305.0        205.0
Long-Term Debt (Qualifying as risk-based capital-$315.0 at June 1997, $334.6 at 
 December 1996, $234.6 at June 1996)                                                             443.5         427.8        332.1
Floating Rate Capital Securities (Qualifies as risk-based capital)                               267.3             -            -
Liability on Acceptances                                                                          41.3          44.7         34.0
Other Liabilities                                                                                619.8         580.3        402.2
- -------------------------------------------------------------------------------------        ---------     ---------    ---------
  Total Liabilities                                                                           24,402.1      20,064.2     20,257.5
- -------------------------------------------------------------------------------------        ---------     ---------    --------- 
Stockholders' Equity
Preferred Stock                                                                                  120.0         120.0        120.0
Common Stock, $1.66 2/3 Par Value; Authorized 280,000,000 shares at June 1997, and
  140,000,000 shares at December 1996 and June 1996; Outstanding 111,679,056 at
  June 1997, 111,247,732 at December 1996 and 56,272,053 at June 1996                            189.9         189.9         95.0
Capital Surplus                                                                                  224.5         231.7        329.5
Retained Earnings                                                                              1,214.4       1,110.2      1,016.4
Net Unrealized Gain (Loss) on Securities Available for Sale                                        2.2           1.6         (1.1)
Common Stock Issuable - Performance Plan                                                          11.7          10.4         10.4
Deferred Compensation - ESOP and Other                                                           (35.7)        (35.5)       (37.7)
Treasury Stock - (at cost, 2,281,706 shares at June 1997, 2,712,780 shares at
  December 1996, and 707,526 shares at June 1996)                                                (78.1)        (84.2)       (38.8)
- -------------------------------------------------------------------------------------        ---------     ---------    ---------
  Total Stockholders' Equity                                                                   1,648.9       1,544.1      1,493.7
- -------------------------------------------------------------------------------------        ---------     ---------    ---------
Total Liabilities and Stockholders' Equity                                                   $26,051.0     $21,608.3    $21,751.2
- -------------------------------------------------------------------------------------        ---------     ---------    ---------  
</TABLE> 

                                       2
<PAGE>

<TABLE>
<CAPTION>
CONSOLIDATED STATEMENT OF INCOME                                                         NORTHERN TRUST CORPORATION

                                                                                Second Quarter                 Six Months
                                                                                Ended June 30                 Ended June 30
                                                                           ------------------------      -------------------------
($ In Millions Except Per Share Information)                                      1997         1996             1997          1996
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
<S>                                                                        <C>           <C>             <C>           <C>
Interest Income
    Loans and Leases                                                            $195.9       $169.3           $379.5        $333.2
    Securities
        Available For Sale                                                        83.6         83.5            155.7         168.5
        Held to Maturity                                                           7.8          8.1             15.7          16.5
        Trading Account                                                             .2           .1               .3            .3
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
    Total Securities                                                              91.6         91.7            171.7         185.3
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
    Time Deposits with Banks                                                      31.5         20.9             58.7          43.7
    Federal Funds Sold and Securities Purchased under Agreements to Resell
        and Other Interest-Bearing                                                12.8          4.2             21.9           8.8
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Total Interest Income                                                            331.8        286.1            631.8         571.0
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Interest Expense
    Deposits                                                                     124.4        109.6            238.6         221.1
    Federal Funds Purchased                                                       19.0         22.5             38.6          51.2
    Securities Sold under Agreements to Repurchase                                17.6         28.0             39.3          54.1
    Commercial Paper                                                               1.9          2.0              3.8           3.9
    Other Borrowings                                                              44.3         18.7             67.2          31.5
    Senior Notes                                                                   3.5          3.4              7.2           7.5
    Long-Term Debt                                                                 8.0          6.4             16.0          12.8
    Floating Rate Capital Securities                                               3.9            -              5.8             -
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Total Interest Expense                                                           222.6        190.6            416.5         382.1
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Net Interest Income                                                              109.2         95.5            215.3         188.9
Provision for Credit Losses                                                         .5          4.0              1.0           9.0
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Net Interest Income after Provision for Credit Losses                            108.7         91.5            214.3         179.9
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Noninterest Income
    Trust Fees                                                                   168.3        149.2            326.6         293.6
    Treasury Management Fees                                                      15.0         14.5             29.6          27.5
    Foreign Exchange Trading Profits                                              23.9         15.1             44.3          27.6
    Security Commissions and Trading Income                                        6.6          6.4             12.5          12.7
    Other Operating Income                                                         9.4         10.4             18.9          22.1
    Investment Security Gains                                                        -           .1               .6            .4
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Total Noninterest Income                                                         223.2        195.7            432.5         383.9
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Income before Noninterest Expenses                                               331.9        287.2            646.8         563.8
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Noninterest Expenses
    Salaries                                                                     107.6         90.0            209.0         177.7
    Pension and Other Employee Benefits                                           20.5         18.4             41.6          38.8
    Occupancy Expense                                                             16.4         14.9             32.5          30.0
    Equipment Expense                                                             14.9         14.1             29.8          28.1
    Other Operating Expenses                                                      57.6         54.7            110.6         102.0
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Total Noninterest Expenses                                                       217.0        192.1            423.5         376.6
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Income before Income Taxes                                                       114.9         95.1            223.3         187.2
Provision for Income Taxes                                                        39.5         31.7             76.2          62.3
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Net Income                                                                     $  75.4      $  63.4           $147.1        $124.9
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Net Income Applicable to Common Stock                                          $  74.2      $  62.2           $144.7        $122.4
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Net Income Per Common Share - Primary                                          $   .65      $   .54           $ 1.26        $ 1.07
                            - Fully Diluted                                        .65          .54             1.26          1.06
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
Average Number of Common Shares Outstanding - Primary                      114,483,841  114,889,434      114,566,949   114,935,654
                                            - Fully Diluted                114,790,430  115,171,150      114,837,949   115,609,548
- -------------------------------------------------------------------------  -----------  -----------      -----------   -----------
</TABLE>

                                       3

<PAGE>

<TABLE>
<CAPTION>

CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY                NORTHERN TRUST CORPORATION

                                                                                  Six Months
                                                                                 Ended June 30
                                                                            ----------------------
(In Millions)                                                                   1997          1996
- ---------------------------------------------------------------------       --------      --------
<S>                                                                         <C>           <C>
Preferred Stock
Balance at January 1                                                        $  120.0      $  170.0
Conversion of Preferred Stock, Series E                                            -         (50.0)
- ---------------------------------------------------------------------       --------      --------
Balance at June 30                                                             120.0         120.0
- ---------------------------------------------------------------------       --------      --------
Common Stock
Balance at January 1                                                           189.9          93.6
Conversion of Preferred Stock, Series E                                            -           1.4
- ---------------------------------------------------------------------       --------      --------
Balance at June 30                                                             189.9          95.0
- ---------------------------------------------------------------------       --------      --------
Capital Surplus
Balance at January 1                                                           231.7         306.1
Stock Issued - Incentive Plan and Awards                                        (7.2)         (5.8)
Conversion of Preferred Stock, Series E                                            -          29.2
- ---------------------------------------------------------------------       --------      --------
Balance at June 30                                                             224.5         329.5
- ---------------------------------------------------------------------       --------      --------
Retained Earnings
Balance at January 1                                                         1,110.2         928.8
Net Income                                                                     147.1         124.9
Dividends Declared on Common Stock                                             (40.2)        (35.0)
Dividends Declared on Preferred Stock                                           (2.7)         (2.3)
- ---------------------------------------------------------------------       --------      --------
Balance at June 30                                                           1,214.4       1,016.4
- ---------------------------------------------------------------------       --------      --------
Net Unrealized Gain (Loss) on Securities Available for Sale
Balance at January 1                                                             1.6           2.6
Unrealized Gain (Loss), net                                                       .6          (3.7)
- ---------------------------------------------------------------------       --------      --------
Balance at June 30                                                               2.2          (1.1)
- ---------------------------------------------------------------------       --------      --------
Common Stock Issuable - Performance Plan
Balance at January 1                                                            10.4          14.7
Stock Issuable, net of Stock Issued                                              1.3          (4.3)
- ---------------------------------------------------------------------       --------      --------
Balance at June 30                                                              11.7          10.4
- ---------------------------------------------------------------------       --------      --------
Deferred Compensation - ESOP and Other
Balance at January 1                                                           (35.5)        (39.4)
Compensation Deferred                                                           (4.6)         (1.9)
Compensation Amortized                                                           4.4           3.6
- ---------------------------------------------------------------------       --------      --------
Balance at June 30                                                             (35.7)        (37.7)
- ---------------------------------------------------------------------       --------      --------
Treasury Stock
Balance at January 1                                                           (84.2)        (23.8)
Stock Options and Awards                                                        38.0          28.9
Stock Purchased                                                                (31.9)        (63.1)
Conversion of Preferred Stock, Series E                                            -          19.2
- ---------------------------------------------------------------------       --------      --------
Balance at June 30                                                             (78.1)        (38.8)
- ---------------------------------------------------------------------       --------      --------
Total Stockholders' Equity at June 30                                       $1,648.9      $1,493.7
- ---------------------------------------------------------------------       --------      --------

</TABLE>

                                       4
<PAGE>
<TABLE>
<CAPTION>

CONSOLIDATED STATEMENT OF CASH FLOWS                                                        NORTHERN TRUST CORPORATION

                                                                                                    Six Months
                                                                                                   Ended June 30
                                                                                          ------------------------------
(In Millions)                                                                                       1997           1996
- ----------------------------------------------------------------------------------------  --------------- --------------
<S>                                                                                           <C>           <C>
Cash Flows From Operating Activities:
Net Income                                                                                    $   147.1     $    124.9
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
  Provision for Credit Losses                                                                       1.0            9.0
  Depreciation on Buildings and Equipment                                                          24.7           23.7
  Decrease in Interest Receivable                                                                   7.3              -
  Increase in Interest Payable                                                                     10.0            3.0
  Amortization and Accretion of Securities and Unearned Income                                    (92.8)         (55.7)
  Amortization of Software, Goodwill and Other Intangibles                                         23.4           21.9
  Net (Increase) Decrease in Trading Account Securities                                            (1.0)          85.6
  Other Noncash, net                                                                              (26.1)        (237.9)
- ----------------------------------------------------------------------------------------  --------------- --------------
  Net Cash Provided by (Used in) Operating Activities                                              93.6          (25.5)
- ----------------------------------------------------------------------------------------  --------------- --------------
Cash Flows From Investing Activities:
  Net Increase in Federal Funds Sold and Securities Purchased under Agreements to Resell         (897.3)        (199.2)
  Net (Increase) Decrease in Time Deposits with Banks                                             114.2         (337.8)
  Net (Increase) Decrease in Other Interest-Bearing Assets                                         38.7          (24.0)
  Purchases of Securities-Held to Maturity                                                        (67.1)        (141.5)
  Proceeds from Maturity and Redemption of Securities-Held to Maturity                             92.3          175.9
  Purchases of Securities-Available for Sale                                                  (29,308.7)     (20,717.9)
  Proceeds from Sale, Maturity and Redemption of Securities-Available for Sale                 27,173.2       20,092.8
  Net Increase in Loans and Leases                                                             (1,041.0)        (510.5)
  Purchases of Buildings and Equipment                                                            (25.2)         (31.4)
  Net (Increase) Decrease in Trust Security Settlement Receivables                                107.4          (55.7)
  Other, net                                                                                       (3.4)         (13.4)
- ----------------------------------------------------------------------------------------  ---------------- -------------
  Net Cash Used in Investing Activities                                                        (3,816.9)      (1,762.7)
- ----------------------------------------------------------------------------------------  ---------------- -------------
Cash Flows From Financing Activities:
  Net Increase in Deposits                                                                      2,094.9          779.6
  Net Decrease in Federal Funds Purchased                                                         (31.9)      (1,204.1)
  Net Increase (Decrease) in Securities Sold under Agreements to Repurchase                        93.1         (159.7)
  Net Increase (Decrease) in Commercial Paper                                                        .4           (2.5)
  Net Increase in Short-Term Other Borrowings                                                   1,526.4        2,358.2
  Proceeds from Term Federal Funds Purchased                                                      260.4        1,340.9
  Repayments of Term Federal Funds Purchased                                                     (274.5)      (1,497.8)
  Proceeds from Senior Notes & Long-Term Debt                                                     552.8          701.5
  Repayments of Senior Notes & Long-Term Debt                                                    (207.1)        (516.0)
  Proceeds from Floating Rate Capital Securities                                                  267.3              -
  Treasury Stock Purchased                                                                        (28.6)         (58.8)
  Net Proceeds from Stock Options                                                                   8.6            5.2
  Cash Dividends Paid on Common and Preferred Stock                                               (42.7)         (37.3)
  Other, net                                                                                        3.3            3.0
- ----------------------------------------------------------------------------------------  ---------------- -------------
  Net Cash Provided by Financing Activities                                                     4,222.4        1,712.2
- ----------------------------------------------------------------------------------------  ---------------- -------------
  Increase (Decrease) in Cash and Due from Banks                                                  499.1          (76.0)
  Cash and Due from Banks at Beginning of Year                                                  1,292.5        1,308.9
- ----------------------------------------------------------------------------------------  ---------------- -------------
Cash and Due from Banks at June 30                                                         $    1,791.6     $  1,232.9
- ----------------------------------------------------------------------------------------  ---------------- -------------
Schedule of Noncash Investing and Financing Activities:
  Conversion of Preferred Stock, Series E to Common Stock                                  $          -     $     49.7
  Building and Capital lease Obligation                                                            20.0              -
Supplemental Disclosures of Cash Flow Information:
  Interest Paid on Deposits and Short- and Long-Term Borrowings                            $      406.6     $    379.1
  Income Taxes Paid                                                                                40.1           34.9
- ----------------------------------------------------------------------------------------  ---------------- -------------
</TABLE>
                                     5
<PAGE>
 
Notes to Consolidated Financial Statements

1.   Accounting Policies
    
A.   Basis of Presentation - The consolidated financial statements include the
     accounts of Northern Trust Corporation and its subsidiaries ("Northern
     Trust"), all of which are wholly owned. Significant intercompany balances
     and transactions have been eliminated. The consolidated financial
     statements as of June 30, 1997 and 1996 have not been audited by
     independent public accountants. In the opinion of management, all
     adjustments necessary for a fair presentation of the financial position and
     the results of operations for the interim periods have been made. All such
     adjustments are of a normal recurring nature. Certain reclassifications
     have been made to prior periods' consolidated financial statements to place
     them on a basis comparable with the current period's consolidated financial
     statements. For a description of Northern Trust's significant accounting
     policies, refer to the Notes to Consolidated Financial Statements in the
     1996 Annual Report to Stockholders.
     
     Per share data and average shares outstanding for 1996 have been restated
     to give effect to the two-for-one stock split effected by means of a 100%
     stock distribution on December 9, 1996.
     
B.   Interest Risk Management Instruments - The Securities and Exchange
     Commission recently adopted new rules that require more detailed disclosure
     of accounting policies for derivative financial instruments. The following
     accounting policy disclosures supplement the disclosures included in Note
     1f of the Notes to Consolidated Financial Statements in the 1996 Annual
     Report to Stockholders and are presented below in response to the new
     rules.

     Client-Related and Trading Instruments. Interest risk management
     instruments entered into to meet clients' interest risk management needs or
     for trading purposes are carried at fair value, with realized and
     unrealized gains and losses included in security commissions and trading
     income.

     Asset/Liability Management Instruments. Interest rate swaps are the primary
     interest risk management instrument used for asset/liability management
     purposes. Futures contracts, options, and similar contracts are also used
     for asset/liability management, but these contracts do not have a material
     impact on Northern Trust's financial condition or net income. The hedge
     accounting method is applied to interest rate swaps that meet the hedge
     criteria listed on the following page. Under this method, the accrued
     interest income or expense on the swap is recognized as a component of the
     interest income or expense of the hedged item. Unrealized gains and losses
     on such swaps are recognized consistent with the method of accounting for
     the hedged items. For example, there is no recognition of unrealized gains
     and losses on swaps used to hedge items that are carried at their amortized
     cost. Unrealized gains and losses on interest rate swaps used to hedge
     available for sale securities are reported in stockholders' equity, net of
     applicable taxes.

                                       6
<PAGE>
 
1. Accounting Policies (continued)

   Hedge Criteria for Interest Rate Swaps:

   1)  The swap must reduce Northern Trust's interest rate risk.

   2)  The swap must achieve its intended objective of converting the yield on
       the hedged asset or liability to the desired rate. This criteria is
       assumed to have been met if the interest rate on the hedged asset or
       liability is identical to the offsetting interest rate on the swap. If
       the two rates are not identical, the correlation between the levels of
       the two rates since the inception of the swap must be measured to ensure
       that the swap is meeting its intended objective.

   3)  The notional amount of the swap must be less than or equal to the par
       amount of the item being hedged.

   4)  If a forward swap is entered into to hedge an anticipated transaction,
       the significant terms (e.g., the expected date, type of instrument,
       quantity, and maturity date) of the anticipated transaction must be
       identified, and it must be probable that the anticipated transaction will
       occur.

   If an interest risk management instrument is terminated or ceases to qualify
   for hedge accounting treatment, any realized or unrealized gain or loss at
   the time is deferred and amortized over the remainder of the original hedge
   period. Any subsequent realized or unrealized gains or losses on instruments
   that no longer meet the hedge criteria are reported as security commissions
   and trading income in the consolidated statement of income. If the item being
   hedged is sold, any deferred or unrealized gain or loss on the interest risk
   management instrument at the time of the transaction is considered in the
   calculation of the gain or loss on the sale. If the interest risk management
   instrument is not terminated, it must be marked to market on a prospective
   basis, with realized and unrealized gains and losses included in security
   commissions and trading income in the consolidated statement of income.

   Cash collected and disbursed in connection with interest risk management
   instruments is reported in the consolidated statement of cash flows under the
   heading "Cash Flows From Operating Activities".


                                       7
<PAGE>
 
2.  Securities - The following table summarizes the book and fair values of
securities:
<TABLE>
<CAPTION>
 
                                                June 30, 1997              December 31, 1996           June 30, 1996
                                      ---------------------------------------------------------------------------------
                                            Book           Fair            Book        Fair         Book        Fair
(In Millions)                               Value          Value           Value       Value        Value       Value
- -----------------------------------------------------------------------------------------------------------------------
<S>                                       <C>          <C>             <C>           <C>         <C>          <C>
Held to Maturity
  U.S. Government                         $   66.1       $   66.1        $   73.4    $   73.5     $  114.2    $  114.1
  Obligations of States and
    Political Subdivisions                   298.0          316.8           315.9       336.3        341.3       361.2
  Federal Agency                              16.2           16.2            18.2        18.2         18.2        18.2
  Other                                       93.7           92.7            90.9        90.9         30.4        30.4
- -----------------------------------------------------------------------------------------------------------------------
Subtotal                                     474.0          491.8           498.4       518.9        504.1       523.9
- -----------------------------------------------------------------------------------------------------------------------
Available for Sale
  U.S. Government                            739.6          739.6           906.7       906.7      1,763.9     1,763.9
  Obligations of States and
    Political Subdivisions                   118.4          118.4           117.0       117.0         79.5        79.5
  Federal Agency                           5,523.8        5,523.8         3,096.9     3,096.9      3,779.9     3,779.9
  Preferred Stock                            137.0          137.0           139.4       139.4        110.7       110.7
  Other                                       37.3           37.3            51.7        51.7         61.9        61.9
- -----------------------------------------------------------------------------------------------------------------------
Subtotal                                   6,556.1        6,556.1         4,311.7     4,311.7      5,795.9     5,795.9
- -----------------------------------------------------------------------------------------------------------------------
Trading Account                                5.8            5.8             4.8         4.8          3.3         3.3
- -----------------------------------------------------------------------------------------------------------------------
Total Securities                          $7,035.9       $7,053.7        $4,814.9    $4,835.4     $6,303.3    $6,323.1
- -----------------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
Reconciliation of Book Values to Fair Values of
Securities Held to Maturity                                                     June 30, 1997
- -----------------------------------------------------------------------------------------------------------------
                                                                               Gross Unrealized
                                                             Book              -----------------         Fair
(In Millions)                                                Value             Gains      Losses         Value
- -----------------------------------------------------------------------------------------------------------------
<S>                                                         <C>                  <C>      <C>            <C>
U.S. Government                                            $   66.1            $  --      $ --          $  66.1
Obligations of States and Political Subdivisions              298.0             18.8        --            316.8
Federal Agency                                                 16.2               .1        .1             16.2
Other                                                          93.7               --       1.0             92.7
- -----------------------------------------------------------------------------------------------------------------
Total                                                      $  474.0            $18.9      $1.1          $491.8
- -----------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
Reconciliation of Amortized Cost to Fair Values of
Securities Available for Sale                                                    June 30, 1997
- -----------------------------------------------------------------------------------------------------------------
                                                                            Gross Unrealized
                                                          Amortized        -----------------            Fair
(In Millions)                                               Cost           Gains      Losses            Value
- -----------------------------------------------------------------------------------------------------------------
<S>                                                      <C>               <C>        <C>            <C>
U.S. Government                                          $  739.4           $ .8      $ .6            $  739.6
Obligations of States and Political Subdivisions            114.5            3.9        --               118.4
Federal Agency                                            5,523.7            2.0       1.9             5,523.8
Preferred Stock                                             137.1             --        .1               137.0
Other                                                        38.2             --        .9                37.3
- -----------------------------------------------------------------------------------------------------------------
Total                                                    $6,552.9           $6.7      $3.5            $6,556.1
- -----------------------------------------------------------------------------------------------------------------
</TABLE>

                                       8
<PAGE>
 
Unrealized gains and losses on off-balance sheet financial instruments used to
hedge available for sale securities totaled $2.7 million and $2.4 million,
respectively, as of June 30, 1997. At June 30, 1997, stockholders' equity
included a credit of $2.2 million, net of tax, to recognize the appreciation on
securities available for sale and the related hedges.


3.  Pledged Assets - Securities and loans pledged to secure public and trust
deposits, repurchase agreements and for other purposes as required or permitted
by law were $8.2 billion on June 30, 1997, $5.5 billion on December 31, 1996 and
$6.3 billion on June 30, 1996.

4.  Contingent Liabilities - Standby letters of credit outstanding were $1.4
billion on June 30, 1997, $1.3 billion on December 31, 1996 and $1.3 billion on
June 30, 1996.

5.  Loans and Leases - The following table summarizes amounts outstanding in
selected loan categories:


<TABLE>
<CAPTION>

(In Millions)                      June 30,        December 31,      June 30,
                                     1997             1996             1996
- ------------------------------------------------------------------------------
<S>                               <C>              <C>              <C>
Domestic
  Residential Real Estate         $ 4,861.1         $ 4,557.5       $ 4,300.8
  Commercial and Industrial         3,463.2           3,161.4         3,293.8
  Broker                              334.0             389.1           284.2
  Commercial Real Estate              602.2             557.7           577.9
  Consumer                          1,104.0             989.8           803.4
  Other                               643.2             632.1           468.0
  Lease Financing                     295.3             267.8           209.3
- ------------------------------------------------------------------------------
Total Domestic                     11,303.0          10,555.4         9,937.4
International                         655.1             382.0           467.8
Total Loans and Leases            $11,958.1         $10,937.4       $10,405.2
- ------------------------------------------------------------------------------
</TABLE>

At June 30, 1997, other domestic and international loans included $847.0 million
of overnight trust-related advances primarily in connection with next day
security settlements, compared with $765.3 million at December 31, 1996 and
$588.6 million at June 30, 1996.

At June 30, 1997, nonperforming loans totaled $55.3 million. Included in this
amount were loans with a recorded investment of $52.7 million which were also
classified as impaired. A loan is impaired when, based on current information
and events, it is probable that a creditor will be unable to collect all amounts
due according to the contractual terms of the loan agreement. Impaired loans
totaling $12.0 million had no portion of the reserve for credit losses allocated
to them, while $40.7 million had an allocated reserve of $3.4 million. For the
second quarter of 1997, the total recorded investment in impaired loans averaged
$28.0 million. Total interest income recorded on impaired loans for the quarter
ended June 30,1997 was $26 thousand, recognized on the accrual-basis method of
accounting.

                                       9
<PAGE>
 
At June 30, 1996, nonperforming loans totaled $38.9 million and included $35.4
million of impaired loans. Of these impaired loans, $14.6 million had no reserve
allocation while $20.8 million had an allocated reserve of $1.0 million.
Impaired loans for the second quarter of 1996 averaged $27.8 million with $166
thousand of interest income recognized principally on the cash-basis method of
accounting.

6.  Reserve for Credit Losses - Changes in the reserve for credit losses were as
follows:

<TABLE>
<CAPTION>
 
                                    Six Months
                                   Ended June 30
                                 ----------------
(In Millions)                      1997     1996
- -------------------------------------------------
<S>                               <C>      <C>
Balance at Beginning of Period    $148.3   $147.1
Charge-Offs
  Commercial Real Estate             (.6)    (3.9)
  Other                             (2.4)    (5.7)
  International                        -      (.2)
- -------------------------------------------------
Total Charge-Offs                   (3.0)    (9.8)
- -------------------------------------------------
Recoveries                           2.1      1.1
- -------------------------------------------------
Net Charge-Offs                      (.9)    (8.7)
Provision for Credit Losses          1.0      9.0
- -------------------------------------------------
Balance at End of Period          $148.4   $147.4
- -------------------------------------------------
</TABLE>

7.  Floating Rate Capital Securities - On April 25, 1997, the Corporation
issued, through a separate wholly owned statutory business trust, $120 million
of Floating Rate Capital Securities, Series B, which qualify as tier 1 capital.
These securities were issued at a discount to yield 67.9 basis points above the
three-month London Interbank Offered Rate (LIBOR) and mature on April 15, 2027.

8.  Earnings Per Share - In February 1997, the Financial Accounting Standards
Board issued Statement of Financial Accounting Standard (SFAS) No. 128,
"Earnings Per Share".  This new statement establishes standards for computing
and presenting earnings per share (EPS) and applies to entities with publicly
held common stock or potential common stock.  SFAS No. 128 replaces the
presentation of primary EPS with a presentation of basic EPS.  Basic EPS is
computed by dividing income available to common stockholders by the weighted-
average number of common shares outstanding for the period.  This approach
differs from the current methodology for calculating primary net income per
share which also considers common stock equivalents, such as stock options and
stock awards.  SFAS No. 128 also requires the presentation of diluted EPS, which
is computed similarly to fully diluted EPS pursuant to Accounting Principles
Board Opinion No. 15.


                                      10
<PAGE>
 
SFAS No. 128 is effective for financial statements issued for periods ending
after December 15, 1997, including interim periods; earlier application is not
permitted. It requires the restatement of all prior period EPS data presented.

The following data, which is presented for comparative purposes only, shows the
pro forma effect on EPS of adopting SFAS No. 128:

<TABLE>
<CAPTION>


                                         Second Quarter Ended       Six Months Ended
                                               June 30                  June 30
                                      --------------------------------------------------
                                         1997      1996              1997       1996

- ----------------------------------------------------------------------------------------
<S>                                      <C>         <C>            <C>          <C>
Earnings Per Share (as reported)
  Primary                                $.65        $.54           $1.26        $1.07
  Fully Diluted                           .65         .54            1.26         1.06
- ----------------------------------------------------------------------------------------
Pro Forma Earnings Per Share
(computed according to SFAS No. 128)
  Basic                                  $.67        $.55           $1.30        $1.09
  Diluted                                 .65         .54            1.26         1.06
- ----------------------------------------------------------------------------------------
</TABLE>

9.  Lease/Purchase Commitment - In June 1997, The Northern Trust Company (the
Bank) entered into an agreement to purchase a building and adjacent land located
across the street from the Bank's Chicago Operations Center for $23.5 million in
January 2000. The building, which contains approximately 340,000 square feet of
rentable office space, will be used for future expansion and to relocate the
computer data center and some personnel currently located in leased facilities
in downtown Chicago. Prior to the purchase date, the Bank will lease, in phases,
approximately two floors of this six-story building.

The transaction is being accounted for as a capital lease obligation. The
present value of the land and building is reported in buildings and equipment,
and the lease obligation appears in long-term debt in the consolidated balance
sheet.

                                      11
<PAGE>
 
Item 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                CONDITION AND RESULTS OF OPERATIONS


SECOND QUARTER EARNINGS HIGHLIGHTS

Net income per common share on a fully diluted basis increased 20% to a record
$.65 for the second quarter, up from $.54 earned a year ago. Net income
increased 19% to a record $75.4 million from the $63.4 million earned in the
second quarter of last year. This earnings performance produced an annualized
return on average common equity (ROE) of 20.01% versus 18.47% reported last
year, and an annualized return on average assets (ROA) of 1.27% versus 1.21% in
1996. Total revenues stated on a fully taxable equivalent basis increased 14% in
the quarter to $340.9 million. Trust fees, foreign exchange trading profits and
net interest income all registered double-digit growth, while noninterest
expenses increased 13%.

The 20% earnings per share growth significantly exceeded Northern Trust's
strategic financial target for this measure and return on common equity was at
the upper end of its 18-20% strategic target. The productivity ratio, which is
derived by dividing total taxable equivalent revenue by noninterest expenses,
was 157%. Northern Trust's recently increased target for this measure is 160%.


NONINTEREST INCOME

Noninterest income increased 14% and totaled $223.2 million for the quarter,
accounting for 65% of total taxable equivalent revenue. Trust fees of $168.3
million increased 13% or $19.1 million over the like period of 1996, and
represented 75% of noninterest income and 49% of total taxable equivalent
revenue. This fee growth was driven by new business, increased transaction
volumes and higher market values of trust assets administered. Trust assets
under administration at June 30, 1997 increased 30% and totaled $898.4 billion
compared to $692.9 billion a year ago and $823.0 billion at March 31, 1997.

Trust fees from Personal Financial Services (PFS) increased 12% from the prior
year level of $72.3 million and totaled $81.1 million for the second quarter,
reflecting strong growth throughout Northern Trust's five-state network of PFS
offices. PFS trust fee growth resulted primarily from exceptionally strong new
business, with the ratio of new business to lost or terminated business
continuing to exceed the Corporation's 4:1 goal, and from favorable equity
markets. The PFS Wealth Management Group, which administers significant family-
asset pools nationwide, continued to achieve excellent performance, with trust
fees increasing 31% to $7.2 million, and now administers $25.6 billion of trust
assets. Total personal trust assets under administration increased $19.0 billion
from the prior year and $8.1 billion since March 31, 1997, and totaled $95.7
billion at June 30, 1997. Of this amount, $56.4 billion was under management 
compared to $45.1 billion one year ago and $52.1 billion at March 31, 1997.

                                      12
<PAGE>
 
NONINTEREST INCOME (continued)

During the second quarter of 1997, Northern Trust expanded its Florida presence
by opening the Doral office in Dade County, the 24th office in that state. With
the addition of this new office, Northern Trust's national network of PFS
offices consists of 61 locations in Illinois, Florida, California, Arizona and
Texas. Trust fees generated outside of Illinois now comprise approximately one-
half of total PFS trust fees.

Trust fees from Corporate and Institutional Services (C&IS) increased 13% to
$87.2 million from $76.9 million in the year-ago quarter. These fees are derived
from a full range of custody, investment and advisory services rendered to
retirement and other asset pools of corporate and institutional clients
worldwide, and all of these services contributed to the second quarter fee
growth. Securities lending, which generally benefits in the second quarter from
strong seasonal demand for international equity securities, continued to achieve
outstanding results, with fees increasing 35% from the prior year quarter to
$19.2 million. Fees from investment management services, including the
activities of Northern Trust Global Advisors, Inc., were also strong, increasing
25% from last year's second quarter. The overall increase in C&IS trust fees
reflects net new business, moderated by the effect of changing pricing
structures for client relationships which focus on total client revenues. These
revenues increasingly include earnings from custody-related deposits and foreign
exchange trading profits which are not reflected in trust fees. Approximately
two-thirds of net annualized fees on C&IS trust services sold in the quarter
came from new clients, reflecting continuing industry consolidation. C&IS trust
assets under administration grew $186.5 billion or 30% over last year and $67.3 
billion since March 31, 1997, and now total $802.7 billion. Of this amount, 
$102.0 billion is managed by Northern Trust, compared to $74.8 billion one year 
ago and $91.4 billion at March 31, 1997. Trust assets under administration
included approximately $123 billion of global custody assets.

Foreign exchange trading profits established a record, increasing 58% to $23.9
million from $15.1 million in the year-ago quarter. The record profits resulted
from a combination of higher volumes and significant rate volatility. Factors
impacting foreign exchange rates during the quarter included the continued
uncertainty surrounding the viability of the proposed European monetary union,
the strengthening of the Japanese yen in relation to the U.S. dollar, and
increased volatility in several of the secondary Asian currencies.

Fees generated from treasury management services were $15.0 million, also a new
high, up from $14.5 million in the comparable quarter last year. Total treasury
management revenues from both fees and the computed value of compensating
deposit balances increased 5% from the second quarter of 1996 to $23.0 million,
reflecting the continued growth in new business from both new and existing
clients. The growth was concentrated primarily within the electronic-based
products.

                                      13
<PAGE>
 
NONINTEREST INCOME (continued)

Security commissions and trading income totaled $6.6 million compared with $6.4
million reported in the second quarter of 1996. The slight increase was due
primarily to higher commission revenues at Northern Futures Corporation.

Other operating income primarily includes loan, letter of credit and deposit-
related service fees, and totaled $9.4 million for the quarter compared with
$10.4 million in the prior year. The decline from the prior year was due
primarily to lower balances held at banks serving as global subcustodians
resulting in a reduction in compensation received. The lower balances partially
reflect a more aggressive approach to investing these otherwise idle funds in
money market assets with the related benefit recognized in net interest income.

On July 15, 1997, The Northern Trust Company (Bank) reached a settlement with
Illinois banking regulators concerning the disposition of certain unclaimed
balances accumulated over a number of years. Based on the resolution of this
matter, the Bank will record approximately $10.0 million of other operating
income during the third quarter of this year.


NET INTEREST INCOME

Net interest income for the quarter totaled a record $109.2 million, 14% higher
than the $95.5 million reported in the second quarter of 1996. Net interest
income is defined as the total of interest income and amortized fees on earning
assets, less interest expense on deposits and borrowed funds, adjusted for the
impact of off-balance sheet hedging activity. When net interest income is
adjusted to a fully taxable equivalent (FTE) basis, yields on taxable,
nontaxable and partially taxable assets are comparable, although the adjustment
to a FTE basis has no impact on net income. Net interest income on a FTE basis
for the second quarter was $117.7 million, up 13% from the $104.3 million
reported in 1996. The increase in net interest income reflects growth in earning
assets and higher levels of noninterest-related funds, driven by increases in
both demand deposits and common equity. The net interest margin fell slightly to
2.20% from 2.22% reported in the year-ago quarter.

Earning assets for the second quarter averaged $21.5 billion, up 14% from the
$18.9 billion average for the same quarter of 1996. The $2.6 billion growth in
average earning assets was concentrated in the loan portfolio which increased
14% to average $11.6 billion and in money market assets which increased $1.4
billion on average from the prior year level. Securities declined $241 million
on average, concentrated within the short-term U.S. Government portfolio.

                                       14
<PAGE>
 
NET INTEREST INCOME (continued)

The loan growth was concentrated primarily in the domestic portfolio.
Residential mortgage loans continued to account for the largest portion of the
domestic growth, increasing 14% to average $4.8 billion, comprising 41% of the
total loan portfolio. Commercial and industrial loans averaged $3.6 billion
during the second quarter compared to $3.3 billion in the prior year quarter.
Money market assets increased $1.4 billion to average $3.4 billion in the
quarter, principally driven by a higher level of foreign office time deposits
resulting from growth in global custody activities and the more active
investment of noninterest-bearing balances held with global subcustodians. The
securities portfolio declined 4% to average $6.5 billion as short-term U.S.
Government securities either matured or were sold.

Funding for the growth in earning assets came from several sources. Total
interest-bearing deposits averaged $11.2 billion, up 12% or $1.2 billion from
the second quarter of 1996. This growth came principally from foreign office
time deposits (up $696 million), savings and money market deposits (up $242
million), and other time deposits (up $310 million). The increase in foreign
office time deposits resulted primarily from growth in global custody activity.
The growth in other interest-related funds resulted from higher Treasury Tax and
Loan borrowings and the issuance of $270 million of Floating Rate Capital
Securities during the first half of 1997. Noninterest-related funds increased
16% to average $3.3 billion, due to strong demand deposit growth and a $131
million increase in common stockholders' equity resulting from retained
earnings.


PROVISION FOR CREDIT LOSSES

The provision for credit losses of $.5 million was down from $4.0 million
reported in the second quarter of 1996. For a discussion of the provision and
reserve for credit losses, refer to the Asset Quality section.


NONINTEREST EXPENSES

Noninterest expenses totaled $217.0 million for the quarter, up $24.9 million or
13% from the year-ago quarter. The expense growth resulted primarily from staff
growth, salary adjustments and higher costs for performance-based compensation.
In addition, expense growth was also driven by the continuing investments in
technology, PFS office expansion, the opening of a Singapore office, the
expansion of the global custody network and operating costs associated with the
growth in trust assets under administration.

Salaries and benefits, which represent 59% of total noninterest expenses,
increased to $128.1 million from $108.4 million in the year-ago quarter. The
increase in salaries and benefits resulted from salary adjustments and an 8%
increase in staff levels from

                                      15
<PAGE>
 
NONINTEREST EXPENSES (continued)

one year ago required to support new office expansion, growth initiatives and
record volumes of new business generated by both PFS and C&IS. In addition,
excellent new business development results, record foreign exchange profits,
strong corporate earnings, and the price increase in Northern Trust Corporation
stock all contributed to higher performance-based compensation expenses. The 29%
increase in Northern Trust's stock price from March 31, 1997 alone resulted in
an additional $3.5 million in compensation expense. Staff on a full-time
equivalent basis at June 30, 1997 totaled 7,254, up 5% from 6,933 at the end of
1996 and 8% higher than the 6,698 at June 30, 1996.

Net occupancy expense totaled $16.4 million, up 10% from $14.9 million in the
second quarter of 1996, due in large part to the opening of six additional
private banking and trust offices over the past twelve months, as well as the
opening of the Singapore office. The principal components of the increase were
higher net rental costs, real estate taxes and maintenance expense.

Equipment expense, which includes depreciation, rental and maintenance costs,
totaled $14.9 million, up $.8 million or 6% from the second quarter of 1996. The
principal components of the increase were higher levels of depreciation and
maintenance of computer hardware, personal computers and equipment.

Other operating expenses in the quarter totaled $57.6 million compared to $54.7
million last year. The increase in the 1997 expense level was primarily the
result of continued investment in technology, expansion of the personal trust
and banking office network, and higher operating expenses necessary to support
business growth. The expense categories affected were computer software
amortization, technical and consulting services, employee hiring and relocation
costs, and business promotional expenses, partially offset by lower costs
associated with processing errors.

The components of other operating expenses were as follows:

<TABLE>
<CAPTION>

                                          Second Quarter
                                          Ended June 30
                                        -----------------
(In Millions)                              1997   1996
- ---------------------------------------------------------
<S>                                       <C>    <C>
 Business Development                     $ 8.4  $ 6.7
 Purchased Professional Services           21.0   18.3
 Telecommunications                         3.0    3.0
 Postage and Supplies                       4.9    5.3
 Software Amortization                      9.2    8.6
 Goodwill and Other Intangibles             2.5    2.4
  Amortization
 Other Expense                              8.6   10.4
- ----------------------------------------------------------
 Total Other Operating Expenses           $57.6  $54.7
- ----------------------------------------------------------
</TABLE>

                                      16
<PAGE>
 
PROVISION FOR INCOME TAXES

The provision for income taxes was $39.5 million for the second quarter compared
with $31.7 million in the year-ago quarter. The higher tax provision in 1997
resulted primarily from the growth in taxable earnings for both federal and
state income tax purposes. The effective tax rate was 34% for 1997 versus 33% in
1996.


SIX MONTH EARNINGS HIGHLIGHTS

Net income per common share on a fully diluted basis was $1.26 compared to $1.06
last year, an increase of 19%. Net income increased 18% to $147.1 million, up
from $124.9 million in the same period of 1996. The ROE for the six month period
was 19.96% versus 18.41% one year ago, while the ROA improved to 1.28% from
1.20% in the same period last year.

Total revenues stated on a FTE basis increased 13% from 1996 levels. Trust fees
totaled $326.6 million, up 11% from $293.6 million last year. The fee portion of
treasury management revenues totaled $29.6 million, up 8% from the $27.5 million
reported in 1996. Total treasury management revenues, which in addition to fees,
includes the computed value of compensating deposit balances, increased 7% to
$45.4 million. These compensating deposit balances contributed to the
improvement in net interest income. Foreign exchange trading profits totaled
$44.3 million, up 61% from the prior year's performance. Security commissions
and trading income totaled $12.5 million, essentially unchanged from the prior
year. Other operating income totaled $18.9 million for the period compared with
$22.1 million in 1996. The decline from the prior year was due to lower balances
held at banks serving as global subcustodians resulting in a reduction in
compensation received. The lower balances reflect a more aggressive approach to
investing these otherwise idle funds in money market assets with the related
benefit recognized in net interest income. In addition, the elimination of
float-related compensation resulting from the Depository Trust Company's first
quarter 1996 conversion to a same-day settlement basis for security transactions
also reduced other operating income.

Net interest income stated on a FTE basis totaled $231.8 million, up 12% from
the $206.3 million in the same period of 1996. The provision for credit losses
decreased $8.0 million to $1.0 million in 1997. Net loan charge-offs decreased
to $.9 million from $8.7 million in the prior year. Noninterest expenses were up
12% and totaled $423.5 million compared to $376.6 million a year ago.

                                      17
<PAGE>
 
BALANCE SHEET

Total assets at June 30, 1997 were $26.1 billion and averaged $23.9 billion for
the second quarter, up 13% from last year's average of $21.0 billion. Due to
increased lending activity, loans and leases grew to $12.0 billion at June 30,
1997, and averaged $11.6 billion for the quarter. This compares with $10.4
billion in total loans and leases at June 30, 1996 and $10.2 billion on average
for the second quarter of last year.

Driven by continued strong earnings growth, offset in part by Northern Trust's
stock buyback program, common stockholders' equity increased to $1.5 billion at
June 30, 1997 and averaged $1.5 billion for the quarter, up 10% from the $1.4
billion average in last year's second quarter. Total stockholders' equity
averaged $1.6 billion for the second quarter compared with $1.5 billion in 1996.

During the quarter, Northern Trust Corporation acquired a total of 305,083 of
its own common shares at a cost of $14.0 million pursuant to the stock buyback
program authorized by the Board of Directors. An additional 3.9 million shares
may be purchased after June 30, 1997 under the buyback program.

Northern Trust's risk-based capital ratios were further strengthened by the
issuance of $120 million of Floating Rate Capital Securities, Series B, which
qualify as tier 1 capital for risk-based capital purposes. The securities were
issued in April, 1997 at a discount to yield 67.9 basis points above three-month
LIBOR. Tier 1 and total capital ratios were 9.6% and 12.9%, respectively, at
June 30, 1997. These capital ratios are well above the minimum regulatory
requirements of 4% for tier 1 and 8% for total risk-based capital ratios. The
leverage ratio (tier 1 capital to second quarter average assets) of 7.2% at June
30, 1997, also exceeded the minimum regulatory requirement of 3%. In addition,
each of Northern Trust's subsidiary banks had a ratio above 7.8% for tier 1
capital, 10.6% for total risk-based capital, and 5.9% for the leverage ratio.


ASSET QUALITY

Nonperforming assets consist of nonaccrual loans, restructured loans and other
real estate owned (OREO). Nonperforming assets at June 30, 1997 totaled $58.5
million, compared with $21.4 million at December 31, 1996 and $40.5 million at
June 30, 1996. Domestic nonaccrual loans and leases, consisting primarily of
commercial loans, totaled $52.7 million, or .47% of total domestic loans and
leases at June 30, 1997. The increase is principally a result of one borrower's
Chapter 11 reorganization filing. Northern Trust's portion of the affected
syndicated bank loan is $35.0 million. At December 31, 1996 and June 30, 1996,
domestic nonaccrual loans and leases totaled $16.9 million and $36.2 million,
respectively.

                                      18
<PAGE>
 
ASSET QUALITY (continued)

The following Nonperforming Asset table presents the outstanding amounts of
nonaccrual loans and leases, restructured loans and OREO. Also shown are loans
that have interest or principal payments that are delinquent 90 days or more and
are still accruing interest. The balance in this category at any quarter end can
fluctuate widely based on the timing of cash collections, renegotiations and
renewals.

<TABLE>
<CAPTION>
 
                                       June 30  March 31  December 31  June 30
                                       ----------------------------------------
(In Millions)                           1997      1997       1996       1996
- -------------------------------------------------------------------------------
<S>                                     <C>       <C>        <C>        <C>
Nonaccrual Loans and Leases
 Domestic
  Residential Real Estate               $ 5.1     $ 5.3        $ 3.2    $ 1.9
  Commercial & Industrial                40.5       6.0          2.2      3.0
  Commercial Real Estate                  6.6       7.6         11.3     29.3
  Consumer                                 .5        .2           .2      2.0
- -------------------------------------------------------------------------------
 Total Domestic                          52.7      19.1         16.9     36.2
 International                              -         -            -        -
- -------------------------------------------------------------------------------
Total Nonaccrual Loans and Leases        52.7      19.1         16.9     36.2
Restructured Loans                        2.6       2.6          2.6      2.7
Other Real Estate Owned                   3.2       2.2          1.9      1.6
- ------------------------------------------------------------------------------- 
Total Nonperforming Assets              $58.5     $23.9        $21.4    $40.5
- -------------------------------------------------------------------------------
Total 90 Day Past Due Loans (still      
 accruing)                              $28.8     $28.1        $15.2    $14.6
- -------------------------------------------------------------------------------
</TABLE>

Provision and Reserve for Credit Losses. The provision for credit losses is the
charge against current earnings that is determined by management through a
disciplined credit review process, as the amount needed to maintain a reserve
that is sufficient to absorb credit losses inherent in Northern Trust's loan and
lease portfolios and other credit undertakings. While the largest portion of
this reserve is intended to cover loan and lease losses, it is considered a
general reserve that is available to cover all credit-related exposures.

The 1997 second quarter provision for credit losses was $.5 million, compared
with $4.0 million in the second quarter of 1996. Net charge-offs totaled $.5
million in the second quarter of 1997, versus $3.8 million last year. The
reserve for credit losses was $148.4 million or 1.24% of outstanding loans at
June 30, 1997. This compares with $148.3 million or 1.36% of outstanding loans
at December 31, 1996 and $147.4 million or 1.42% of outstanding loans at June
30, 1996. The lower reserve to outstanding loans ratio at June 30, 1997 is
attributable to loan growth, a significant portion of which is in low-risk
residential mortgage lending.

The overall quality of the loan portfolio remains strong. Management continues
to monitor closely the financial condition of borrowers currently experiencing
financial difficulty. Worsening operating results of these borrowers and other
economic conditions could unfavorably impact the level of future charge-offs and
the related provision for credit losses.

                                      19
<PAGE>
 
FORWARD-LOOKING INFORMATION

This report contains statements that may be considered forward-looking, such as
the discussion of Northern Trust's financial goals, business outlook and credit
quality. These statements speak of Northern Trust's plans, goals or
expectations, refer to estimates, or use similar terms. Actual results could
differ materially from the results indicated by these statements because the
realization of those results is subject to many uncertainties including:

 .  The future health of the U.S. and international economies and other economic
   factors that affect wealth creation, investment and savings patterns, and
   Northern Trust's interest rate risk exposure and credit risk.

 .  Regulatory developments in the U.S. and other countries where Northern
   Trust has significant business.

 .  Changes in the nature of Northern Trust's competition resulting from industry
   consolidation, regulatory change and other factors, as well as actions taken
   by particular competitors.

 .  Northern Trust's success in identifying and penetrating targeted markets and
   generating a profit in those markets in a reasonable time.

 .  Northern Trust's ability to continue to fund and accomplish technological
   innovation, improve processes and controls and attract and retain capable
   staff in order to deal with increasing volume and complexity in many of its
   businesses.

 .  The ability of each of Northern Trust's principal businesses to maintain a
   product mix that achieves satisfactory margins.

 .  Changes in tax laws or other legislation that could affect Northern Trust's
   personal and institutional asset administration businesses.

 .  Changes in U.S. and worldwide securities markets, with respect to the market
   values of financial assets and the level of volatility in certain markets
   such as foreign exchange.

Some of these uncertainties that may affect future results are discussed in more
detail in the section of "Management's Discussion and Analysis of Financial
Condition and Results of Operations" captioned "Risk Management" in the 1996
Annual Report to Stockholders (pp. 27-34) and in the sections of "Item 1 -
Business" of the 1996 Annual Report on Form 10-K captioned "Government
Policies", "Competition" and "Regulation and Supervision" (pp. 6-9). All
forward-looking statements included in this document are based upon information
presently available, and Northern Trust assumes no obligation to update any
forward-looking statement.

                                      20
<PAGE>

The following schedule should be read in conjunction with the Net Interest
Income section of Management's Discussion and Analysis of Financial Condition
and Results of Operations.

CONSOLIDATED ANALYSIS OF NET INTEREST INCOME

<TABLE>
<CAPTION>
                                                                                       Second Quarter
                                                        --------------------------------------------------------------------------
(Interest and rate on a taxable equivalent basis)                      1997                                1996
                                                        ----------------------------------  -----------------------------------
($ in Millions)                                          Interest     Volume       Rate      Interest      Volume        Rate
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------   --------
<S>                                                     <C>          <C>          <C>       <C>            <C>          <C>
Average Earning Assets
Money Market Assets
  Federal Funds Sold and Resell Agreements                 $ 12.0    $   853.7       5.66%      $  3.4    $   254.4        5.51%
  Time Deposits with Banks                                   31.5      2,460.5       5.13         20.9      1,678.2        4.99
  Other Interest-Bearing                                       .8         56.9       5.84           .8         54.6        5.80
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Total Money Market Assets                                    44.3      3,371.1       5.27         25.1      1,987.2        5.08
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Securities
  U.S. Government                                            13.3        893.8       5.98         29.8      2,123.9        5.64
  Obligations of States and Political Subdivisions            9.9        415.6       9.53         10.4        419.7        9.88
  Federal Agency                                             71.5      4,947.4       5.79         55.5      3,975.4        5.62
  Other                                                       3.8        248.3       6.21          3.4        227.6        5.93
  Trading Account                                              .2          9.4       7.87           .1          9.1        7.60
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Total Securities                                             98.7      6,514.5       6.08         99.2      6,755.7        5.90
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Loans and Leases                                            197.3     11,610.4       6.82        170.6     10,176.7        6.74
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Total Earning Assets                                       $340.3    $21,496.0       6.35%      $294.9    $18,919.6        6.27%
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Average Source of Funds
Deposits
  Savings and Money Market Deposits                        $ 31.4    $ 3,901.8       3.23%      $ 28.6    $ 3,659.6        3.14%
  Savings Certificates                                       28.9      2,016.9       5.75         29.3      2,053.6        5.75
  Other Time                                                 10.7        772.6       5.55          6.2        462.6        5.40
  Foreign Offices Time                                       53.4      4,503.2       4.76         45.5      3,807.2        4.81
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Total Deposits                                              124.4     11,194.5       4.46        109.6      9,983.0        4.42
Federal Funds Purchased                                      19.0      1,386.6       5.50         22.5      1,717.9        5.27
Repurchase Agreements                                        17.6      1,323.5       5.34         28.0      2,153.1        5.23
Commercial Paper                                              1.9        137.3       5.55          2.0        142.9        5.38
Other Borrowings                                             44.3      3,284.6       5.41         18.7      1,516.3        4.97
Senior Notes                                                  3.5        245.1       5.72          3.4        254.5        5.26
Long-Term Debt                                                8.0        427.9       7.53          6.4        335.9        7.67
Floating Rate Capital Securities                              3.9        236.0       6.53           --            --         --
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Total Interest-Related Funds                                222.6     18,235.5       4.90        190.6     16,103.6        4.76
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Interest Rate Spread                                           --           --       1.45%          --           --        1.51%
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Noninterest-Related Funds                                      --      3,260.5         --           --      2,816.0          --
- ------------------------------------------------------- ----------  -----------   --------  ----------   -----------     -------
Total Source of Funds                                      $222.6    $21,496.0       4.15%      $190.6    $18,919.6        4.05%
- ------------------------------------------------------- ----------  -----------   --------    --------   -----------     -------
Net Interest Income/Margin                                 $117.7           --       2.20%      $104.3           --        2.22%
- ------------------------------------------------------- ---------- ------------   --------    --------   -----------     -------
</TABLE>


ANALYSIS OF NET INTEREST INCOME CHANGES
DUE TO VOLUME AND RATE

<TABLE>
<CAPTION>
                                                              Second Quarter 1997/96                    Six Months 1997/96
                                                        ----------------------------------   -------------------------------------
                                                             Change Due To                         Change Due To
                                                        ------------------------              -------------------------
(In Millions)                                              Volume          Rate       Total      Volume          Rate      Total
- ------------------------------------------------------- ----------    -----------  ---------  -----------    ----------  ---------
<S>                                                     <C>           <C>          <C>        <C>            <C>         <C>
Earning Assets                                              $38.3          $7.1       $45.4       $58.2         $ 1.7      $59.9
Interest-Related Funds                                       27.9           4.1        32.0        37.2          (2.8)      34.4
- ------------------------------------------------------- ----------    -----------  ---------  -----------    ----------  ---------
Net Interest Income                                         $10.4          $3.0       $13.4       $21.0         $ 4.5      $25.5
- ------------------------------------------------------- ----------    -----------  ---------  -----------    ----------   --------
</TABLE>
                                      21
<PAGE>

<TABLE>
<CAPTION>

                                                                                                   NORTHERN TRUST CORPORATION

                                                                                         Six Months
                                                        ---------------------------------------------------------------------------
                                                                        1997                                  1996
                                                        ---------------------------------------------------------------------------
($ in Millions)                                          Interest     Volume         Rate      Interest       Volume         Rate
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                     <C>          <C>           <C>         <C>           <C>          <C>
Average Earning Assets
Money Market Assets
  Federal Funds Sold and Resell Agreements              $  20.5     $    747.2     5.55%      $    7.2     $     260.8     5.59%
  Time Deposits with Banks                                 58.7        2,338.7     5.06           43.7         1,711.7     5.13
  Other Interest-Bearing                                    1.4           48.5     5.77            1.6            54.0     5.93
- -----------------------------------------------------------------------------------------  ----------- ----------------------------
Total Money Market Assets                                  80.6        3,134.4     5.19           52.5         2,026.5     5.21
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Securities
  U.S. Government                                          26.6          912.4     5.89           59.4         2,104.2     5.67
  Obligations of States and Political Subdivisions         19.9          418.1     9.53           20.9           420.9     9.94
  Federal Agency                                          131.1        4,605.8     5.74          112.7         3,966.0     5.71
  Other                                                     7.5          245.0     6.20            7.3           245.0     5.98
  Trading Account                                            .3            8.3     7.62             .3             9.3     7.42
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Total Securities                                          185.4        6,189.6     6.04          200.6         6,745.4     5.98
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Loans and Leases                                          382.3       11,366.8     6.78          335.3         9,977.0     6.76
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Total Earning Assets                                     $648.3      $20,690.8     6.32%        $588.4       $18,748.9     6.31%
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Average Source of Funds
Deposits
  Savings and Money Market Deposits                     $  62.1      $ 3,926.4     3.19%       $  56.7       $ 3,618.6     3.15%
  Savings Certificates                                     57.3        2,019.3     5.72           60.2         2,081.9     5.82
  Other Time                                               18.8          694.1     5.46           14.6           537.0     5.47
  Foreign Offices Time                                    100.4        4,293.7     4.72           89.6         3,692.3     4.88
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Total Deposits                                            238.6       10,933.5     4.40          221.1         9,929.8     4.48
Federal Funds Purchased                                    38.6        1,451.7     5.37           51.2         1,930.7     5.34
Repurchase Agreements                                      39.3        1,501.5     5.29           54.1         2,065.1     5.27
Commercial Paper                                            3.8          141.5     5.47            3.9           143.3     5.42
Other Borrowings                                           67.2        2,550.7     5.31           31.5         1,247.2     5.08
Senior Notes                                                7.2          255.0     5.63            7.5           284.4     5.25
Long-Term Debt                                             16.0          427.9     7.55           12.8           335.4     7.65
Floating Rate Capital Securities                            5.8          180.2     6.45            -               -         -
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Total Interest-Related Funds                              416.5       17,442.0     4.81          382.1        15,935.9     4.82
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Interest Rate Spread                                        -             -        1.51%           -               -       1.49%
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Noninterest-Related Funds                                              3,248.8       -             -           2,813.0        -
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Total Source of Funds                                   $ 416.5      $20,690.8     4.06%       $ 382.1       $18,748.9     4.10%
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
Net Interest Income/Margin                              $ 231.8           -        2.26%       $ 206.3             -       2.21%
- ------------------------------------------------------- ---------- -------------- ----------  ----------- -------------------------
                                                                                                                                22
</TABLE>


<PAGE>
 
                          PART II - OTHER INFORMATION



Item 6.        Exhibits and Reports on Form 8-K

      (a.)     Exhibits
               --------

               Exhibit (11)  Computation of Per Share Earnings.

               Exhibit (27)  Financial Data Schedule.



      (b.)     Reports on Form 8-K
               -------------------

               In a report on Form 8-K the Corporation incorporated in Item 5
               its April 14, 1997 press release, reporting its earnings for the
               first quarter of 1997. The press release, with summary financial
               information, was filed pursuant to Item 7.


                                      23
<PAGE>
 
                                   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 thereunto duly authorized.



                               NORTHERN TRUST CORPORATION
                               --------------------------
                                      (Registrant)



Date: August 13, 1997          By: Perry R. Pero
                                   -------------
                                   Perry R. Pero
                                   Senior Executive Vice President
                                   and Chief Financial Officer



Date: August 13, 1997          By: Harry W. Short
                                   --------------
                                   Harry W. Short
                                   Senior Vice President and
                                   Controller
                                   (Chief Accounting Officer)


                                      24
<PAGE>
 
                                 EXHIBIT INDEX



The following exhibits have been filed herewith:


Exhibit
Number          Description
- ------          -----------

(11)            Computation of Per Share Earnings.


(27)            Financial Data Schedule.


                                      25

<PAGE>
 
<TABLE>
<CAPTION>
                                                                                                    EXHIBIT NUMBER (11)
                                                                                                    TO 6/30/97 FORM 10-Q
 
        NORTHERN TRUST CORPORATION
    COMPUTATION OF PER SHARE EARNINGS
 
 
 
 
 

                                                      Second Quarter Ended June 30                  Six Months Ended June 30
                                                   ----------------------------------          -----------------------------------
                                                         1997              1996                      1997                1996
                                                   ----------------   ---------------          ----------------     --------------
<S>                                                <C>                <C>                      <C>                  <C>
Computations Required by
- ---------------------------
Regulation S-K
- --------------

Primary Earnings Per Share
- ---------------------------

Net Income Applicable to
  Common Shares                                        $ 74,133,239      $ 62,198,882              $144,701,157       $122,444,451
                                                   ================   ===============          ================     ==============
Weighted Average Number of Common
  and Common Equivalent Shares Outstanding

     Common Shares                                      111,029,616       112,409,954               110,979,939        112,463,160

     Dilutive Effect of Common
      Equivalent Shares (A)

     Stock Options                                        2,670,631         1,778,748                 2,761,095          1,813,646

     Long Term Performance Stock Plan                       540,984           587,468                   581,752            557,432

     Other                                                  242,610           113,264                   244,163            101,416
                                                   ----------------   ---------------          ----------------     --------------

                                                        114,483,841       114,889,434               114,566,949        114,935,654
                                                   ================   ===============          ================     ==============

Net Income Per Common and
   Common Equivalent Share                                    $0.65             $0.54                     $1.26              $1.07
                                                   ================   ===============          ================     ==============

     (A) Determined by application of the treasury stock method.
</TABLE>

<PAGE>
                                                             EXHIBIT NUMBER (11)
                                                            TO 6/30/97 FORM 10-Q

    NORTHERN TRUST CORPORATION
 COMPUTATION OF PER SHARE EARNINGS


<TABLE>
<CAPTION>

                                                          Second Quarter Ended June 30           Six Months Ended June 30
                                                          -----------------------------        -----------------------------
                                                             1997               1996               1997             1996
                                                          ----------         ----------        -----------      ------------
<S>                                                       <C>                   <C>             <C>               <C>
Computations Required by
- ------------------------
Regulation S-K
- ---------------

Fully Diluted Earnings Per Share
- --------------------------------

Net Income Applicable to
      Common Shares                                       $74,133,239        $62,198,882       $144,701,157     $122,444,451

Add Back:  Dividend on Series E Convertible                                                                           14,756
   Preferred Stock                                        -----------        -----------       ------------     ------------
                                                          $74,133,239        $62,198,882       $144,701,157     $122,459,207
                                                          ===========        ===========       ============     ============

Weighted Average Number of Common
   and Common Equivalent Shares Outstanding

             Common Shares                                111,029,616        112,409,954        110,979,939      112,463,160

             Dilutive Effect of Common
               Equivalent Shares (A)

             Stock Options                                  2,907,179          2,001,912          2,997,074        2,064,710

             Long Term Performance Stock Plan                 593,903            627,454            608,212          583,948

             Other                                            259,732            131,830            252,724          113,776

   Other Potentially Dilutive Securities

             Equivalent Shares Assuming Conversions of
             Series E convertible Preferred Stock                                                                    383,954
                                                         ------------        -----------       ------------     ------------
                                                          114,790,430        115,171,150        114,837,949      115,609,548
                                                         ============        ===========       ============     ============
Net Income Per Common and
      Common Equivalent Share                                   $0.65              $0.54              $1.26            $1.06
                                                         ============        ===========       ============     ============

          (A) Determined by application of the treasury stock method.

</TABLE>


<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 9
<LEGEND> This schedule contains summary financial information extracted from 
the Consolidated Balance Sheet and the Consolidated Statement of Income and is 
qualified in its entirety by reference to such financial statements. 
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                       1,791,584
<INT-BEARING-DEPOSITS>                       1,945,803
<FED-FUNDS-SOLD>                             1,919,918
<TRADING-ASSETS>                                 5,760
<INVESTMENTS-HELD-FOR-SALE>                  6,556,106
<INVESTMENTS-CARRYING>                         474,032
<INVESTMENTS-MARKET>                           491,852
<LOANS>                                     11,958,078
<ALLOWANCE>                                    148,371
<TOTAL-ASSETS>                              26,051,000
<DEPOSITS>                                  15,891,066
<SHORT-TERM>                                 6,981,276
<LIABILITIES-OTHER>                            661,092
<LONG-TERM>                                    868,690
<COMMON>                                       189,935
                                0
                                    120,000
<OTHER-SE>                                   1,338,941
<TOTAL-LIABILITIES-AND-EQUITY>              26,051,000
<INTEREST-LOAN>                                379,467
<INTEREST-INVEST>                              171,439
<INTEREST-OTHER>                                80,933
<INTEREST-TOTAL>                               631,839
<INTEREST-DEPOSIT>                             238,559
<INTEREST-EXPENSE>                             416,518
<INTEREST-INCOME-NET>                          215,321
<LOAN-LOSSES>                                    1,000
<SECURITIES-GAINS>                                 599
<EXPENSE-OTHER>                                423,472
<INCOME-PRETAX>                                223,301
<INCOME-PRE-EXTRAORDINARY>                     147,118
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   147,118
<EPS-PRIMARY>                                     1.26
<EPS-DILUTED>                                     1.26
<YIELD-ACTUAL>                                    2.26
<LOANS-NON>                                     52,705
<LOANS-PAST>                                    28,760
<LOANS-TROUBLED>                                 2,536
<LOANS-PROBLEM>                                      0
<ALLOWANCE-OPEN>                               148,361
<CHARGE-OFFS>                                    3,089
<RECOVERIES>                                     2,133
<ALLOWANCE-CLOSE>                              148,371
<ALLOWANCE-DOMESTIC>                            96,545
<ALLOWANCE-FOREIGN>                              2,283
<ALLOWANCE-UNALLOCATED>                         49,543
        

</TABLE>


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