MFS INSTITUTIONAL TRUST
485BPOS, 1996-06-28
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<PAGE>
   
     As filed with the Securities and Exchange Commission on June 28, 1996
    
                                               1933 Act File No. 33-37615
                                               1940 Act File No. 811-6174

================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                ---------------

                                   FORM N-1A
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
   
                        POST-EFFECTIVE AMENDMENT NO. 12
    
                                      AND
                             REGISTRATION STATEMENT
                                     UNDER
                       THE INVESTMENT COMPANY ACT OF 1940
   
                                AMENDMENT NO. 16
    
                            MFS INSTITUTIONAL TRUST
               (Exact Name of Registrant as Specified in Charter)

               500 Boylston, Street, Boston, Massachusetts 02116
                    (Address of Principal Executive Offices)

       Registrant's Telephone Number, Including Area Code: (617) 954-5000
           Stephen E. Cavan, Massachusetts Financial Services Company
                500 Boylston Street, Boston, Massachusetts 02116
                    (Name and Address of Agent for Service)

                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:
 It is proposed that this filing will become effective (check appropriate box)

|_| immediately upon filing pursuant to paragraph (b)
   
|X| on June 28, 1996 pursuant to paragraph (b)
    
|_| 60 days after filing pursuant to paragraph (a)(i)
|_| on [date] pursuant to paragraph (a)(i)
|_| 75 days after filing pursuant to paragraph (a)(ii)
|_| on [date] pursuant to paragraph (a)(ii) of rule 485.

    If appropriate, check the following box:
|_| this post-effective amendment designates a new effective date for a
    previously filed post-effective amendment

                        STATEMENT PURSUANT TO RULE 24f-2

Pursuant to Rule 24f-2,  the Registrant  has registered an indefinite  number of
securities  under the  Securities Act of 1933 and filed a Rule 24f-2 Notice with
respect to its fiscal year ended June 30, 1995 on August 29, 1995.

================================================================================
<PAGE>
   
The Prospectus dated December 1, 1995 of MFS Institutional Mid-Cap Growth
Equity Fund and MFS Institutional International Equity Fund  is incorporated
in this Post-Effective Amendment No. 12 by reference to the Prospectus of MFS
Institutional Mid-Cap Growth Equity Fund and MFS Institutional International
Equity Fund  filed by the Registrant pursuant to Rule 497 under the Securities
Act of 1933, as amended,  with the Securities and Exchange  Commission via EDGAR
on December 4, 1995.
    
<PAGE>
   
                  MFS INSTITUTIONAL INTERNATIONAL EQUITY FUND
                  MFS INSTITUTIONAL MID-CAP GROWTH EQUITY FUND
                       Series of MFS INSTITUTIONAL TRUST

                 Supplement to the December 1, 1995 Prospectus

The  following  information  should  be  read in  conjunction  with  the  Funds'
Prospectus  and Statement of Additional  Information  dated December 1, 1995 and
contains   financial   information   and  other  changes  with  respect  to  the
International Equity Fund and the Mid-Cap Fund.

Annual Operating Expenses (as percentage of average net assets):*

                                INTERNATIONAL EQUITY FUND      MID-CAP FUND
Management Fees                      0.75%                         0.60%
Other Expenses (after
  expense reduction)**               0.10%                         0.05%
                                     -----                         ----- 
Total Operating Expenses
  (after expense reduction)**        0.85%                         0.65%

*    Based on estimates of expenses for the fiscal year ending June 30, 1996.
**   The Adviser has agreed to bear the expenses of each Fund such that each
     Fund's aggregate  expenses  do  not  exceed  the  following  percentages,
     on an  annualized  basis,  of its average  daily net  assets:  0.85% of the
     International  Equity Fund and 0.65% of the Mid-Cap Fund. Each  arrangement
     may  be  terminated  or  revised  by  MFS at  any  time.  See  "Information
     Concerning  Shares of the Fund - Expenses" in the Prospectus.  Absent these
     expense arrangements, estimated Other Expenses and Total Operating Expenses
     for each Fund would be, on an  annualized  basis,  respectively,  3.63% and
     4.38% of the  International  Equity Fund and 3.63% and 4.23% of the Mid-Cap
     Fund, respectively.

CONDENSED FINANCIAL INFORMATION

The  following  information  should be read in  conjunction  with the  financial
statements  included  in  the  July  1,  1996  Supplement  to the  Statement  of
Additional Information (which have not been audited).

                                  Financial Highlights
                              Period Ended April 30, 1996*

Per share data (for a share outstanding throughout the period):

                                INTERNATIONAL EQUITY FUND      MID-CAP FUND
Net asset value -
  beginning of period                $10.00                         $10.00
Income from investment
  operations# -
         Net investment
           income (Loss)**           $ 0.07                         $(0.01)
         Net realized and
           unrealized gain on
           investments and
           foreign currency
           transactions                0.56                           1.46
                                     ------                         ------     
                  Total from
                    investment
                    operations       $ 0.63                         $ 1.45
                                     ------                         ------
Net asset value - end of period      $10.63                         $11.45
                                     ======                         ======
Total return                           6.30%++                       14.50%++
Ratios (to average net assets)/
  Supplemental data**:
         Expenses                      0.95%+                         0.75%+
         Net Investment
           Income (loss)               2.34%+                        (0.21)%+
Portfolio turnover                     5%                            26%
Net assets at end of period
  (000 omitted)                      $2,423                         $8,382

*    For the  period  from the  commencement  of  investment  operations  of the
     International  Equity  Fund and the  Mid-Cap  Fund,  January  30,  1996 and
     December 28, 1995, respectively, to April 30, 1996.
+    Annualized.
++   Not Annualized.
    
<PAGE>
   
#    Per share data is based on average shares outstanding.
**   The Adviser  voluntarily agreed to maintain the expenses of the Fund at not
     more than 0.95% and 0.75%,  respectively  of each Fund's  average daily net
     assets. To the extent actual expenses were over these limitations,  the net
     investment loss per share and the ratios would have been:

Net investment loss                  $(0.07)                        $(0.10)
Ratios (to average net assets):
     Expenses                          5.63%+                        3.68%+
     Net investment loss              (2.33)%+                      (3.14)%+

                  The date of this Supplement is July 1, 1996.
    
<PAGE>
   
The  Statement  of  Additional   Information  dated  December  1,  1995  of  MFS
Institutional  Mid-Cap  Growth Equity Fund and MFS  Institutional  International
Equity Fund is incorporated in this Post-Effective Amendment No. 12 by reference
to the Statement of Additional  Information of MFS Institutional  Mid-Cap Growth
Equity  Fund  and MFS  Institutional  International  Equity  Fund  filed  by the
Registrant  pursuant to Rule 497 under the  Securities  Act of 1933, as amended,
with the Securities and Exchange Commission via EDGAR on December 4, 1995.
    
<PAGE>
   
                  MFS INSTITUTIONAL INTERNATIONAL EQUITY FUND
                  MFS INSTITUTIONAL MID-CAP GROWTH EQUITY FUND
                       Series of MFS INSTITUTIONAL TRUST

     Supplement to the December 1, 1995 Statement of Additional Information



MANAGEMENT OF THE TRUST

As of June 7, 1996, DePauw University,  313 S. Locust St., Greencastle,  IN, and
certain benefit and pension plans of  Massachusetts  Financial  Services Company
("MFS") were the record owners  approximately of 59.5% and 40.5%,  respectively,
of the  outstanding  shares of the Mid-Cap Fund and certain  benefit and pension
plans of MFS were the  record  owners of 100% of the  outstanding  shares of the
International Equity Fund.

DETERMINATION OF NET ASSET VALUE; PERFORMANCE INFORMATION

The  aggregate  total rate of return for the  International  Equity Fund and the
Mid-Cap  Fund for the  period  from  January  30,  1996 and  December  28,  1995
(commencement  of investment  operations),  respectively,  to April 30, 1996 was
6.30% and 14.50%, respectively,  unannualized. The results would have been lower
had MFS not borne certain expenses of the Fund.

FINANCIAL STATEMENTS

The  Financial  Statements  for  each  Fund,  consisting  of  the  Portfolio  of
Investments at April 30, 1996, the Statement of Assets and  Liabilities at April
30, 1996,  the Statement of Operations for the period from the  commencement  of
investment  operations of the International  Equity Fund and the Mid-Cap Fund on
January 30, 1996 and  December 28, 1995,  respectively,  to April 30, 1996,  the
Statement  of Changes in Net Assets  for the  period  from the  commencement  of
investment  operations of the International  Equity Fund and the Mid-Cap Fund on
January 30, 1996 and December 28, 1995, respectively, to April 30, 1996, and the
Notes  to the  Financial  Statements  are  attached  to and  form a part of this
supplement.


                  The date of this Supplement is July 1, 1996.
    
<PAGE>
   
Portfolio of Investments (Unaudited) - April 30, 1996
MFS Institutional International Equity Fund
- -------------------------------------------------------------------------------

Common Stocks - 94.7%
- ------------------------------------------------------------------------------
Issuer                                              Shares                Value
- -------------------------------------------------------------------------------
Foreign Stocks -- 86.3%
   Australia -- 4.1%
      Q.B.E.Insurance Group Ltd. (Insurance)         9,600     $         50,418
      Seven Network Ltd. (Broadcasting)             16,700               49,892
                                                                ---------------
                                                               $        100,310
- -------------------------------------------------------------------------------
   Denmark -- 0.8%
      Novo-Nordisk, "B" (Pharmaceuticals)              140     $         18,178
- -------------------------------------------------------------------------------
   Finland -- 1.8%
      Aamulehti Yhtymae Oy-II (Publishing)             950     $         24,050
      Huhtamaki Oy "I", Free shares (Food
      Processing)                                      600               19,840
                                                                ---------------
                                                               $         43,890
- -------------------------------------------------------------------------------
   France -- 5.5%
     Accor (Lodging)                                   150     $         20,826
     Michelin "B" (Tire and Rubber)                    700               34,665
     Total S.A. "B" (Oils)                             350               23,735
     Union des Assurances Federales S.A. 
    (Insurance)                                        440               53,431
                                                                ---------------
                                                               $        132,657
- -------------------------------------------------------------------------------
   Germany -- 1.1%
     Volkswagen AG (Automobiles)                        75     $         25,871
- -------------------------------------------------------------------------------
   Greece -- 0.8%
     Hellenic Technodomiki
     (Engineering & Construction)                    1,100     $         18,495
- -------------------------------------------------------------------------------
   Hong Kong  -- 5.3%
     Cosco Pacific Ltd. (Packaging and Container)## 34,000     $         23,957
     Dah Sing Financial (Financial)                  5,600               15,566
     Giordano International (Retail - Apparel)      35,000               32,354
     Liu Chong Hing Bank (Financial - Banking)      15,000               20,750
     Peregrine Investment Holdings
     (Financial Services)                           12,000               18,540
     Wing Hang Bank Ltd. (Financial - Banking)       5,000               18,294
                                                                ---------------
                                                               $        129,461
- -------------------------------------------------------------------------------
   Italy -- 3.3%
     Telecom Italia Mobile (Utilities - Telephone)  57,000     $         79,917
- -------------------------------------------------------------------------------
   Japan -- 19.4%
     Bridgestone Corp (Tire and Rubber)              2,000     $         36,995
     Canon, Inc. (Office Equipment)                  1,000               19,832
     Daiwa House Industrial Co.
     (Manufactured Housing)                          2,000               31,846
     DDI Corp. (Utilities - Telephone)                  10               85,717
     East Japan Railway (Transportation)                 6               31,979
     Kinki Coca-Cola (Beverage)                      1,000               14,779
    
<PAGE>
   
Portfolio of Investments (Unaudited) - April 30, 1996
Common Stocks - continued
- -------------------------------------------------------------------------------
Issuer                                              Shares                Value
- -------------------------------------------------------------------------------
   Japan -- continued
     Kirin Beverage (Beverage)                       2,000     $         28,223
     Matsushita Electric Industrial
     Co. (Electrical Equipment)                      2,000               35,278
     Murata Manufacturing (Electrical Equipment)     1,000               38,711
     Omron Corp. (Electronics)                       2,000               45,004
     Osak Sanso Kogyo (Chemicals)                    8,000               35,698
     Takeda Chemical Industries (Pharmaceuticals)    3,000               51,773
     Teisan KK (Chemicals)                           2,000               13,787
                                                                ---------------
                                                               $        469,622
- -------------------------------------------------------------------------------
   Malaysia -- 1.3%
     New Straits Time Press Bhd. (Publishing)        6,000     $         32,249
- -------------------------------------------------------------------------------
   Netherlands -- 4.7%
     Getronics NV (Computer Software)                  650     $         45,128
     IHC Caland NV (Oil Services)                      600               23,559
     Royal Dutch Petroleum Co. (Oils)                  325               46,285
                                                                ---------------
                                                               $        114,972
- -------------------------------------------------------------------------------
  New Zealand -- 4.7%
    Lion Nathan Ltd (Brewing)                       27,000     $         67,264
    Sky City Ltd. (Gaming)                          11,000               46,730
                                                                ---------------
                                                               $        113,994
- -------------------------------------------------------------------------------
  Philippines -- 0.8%
    Pilipino Telephone (Telecommunications)         13,000     $         19,176
- -------------------------------------------------------------------------------
  Singapore  -- 3.7%
    Singapore Finance Ltd. (Financial Services)     26,000     $         52,167
    Singapore Press HD Ltd. (Publishing)             2,000               37,851
                                                                ---------------
                                                               $         90,018
- -------------------------------------------------------------------------------
  Spain -- 6.3%
    Acerinox S.A. (Iron/Steel)                         440     $         49,762
    Cubiertas Y Mzov S.A. (Engineering)                600               38,364
    Iberdrola (Utilities - Electric)                 2,200               21,542
    Repsol S.A. (Oils)                               1,200               44,027
                                                                ---------------
                                                               $        153,695
- -------------------------------------------------------------------------------
  Sweden -- 11.2%
    ASTRA AB, "B", Free Shares
    (Pharmaceuticals)                                  740     $         75,005
    ASTRA AB, "B", Free Shares
    (Pharmaceuticals)                                1,600               70,597
    Marieberg Tidings AB, "A" (Publishing)           1,000               23,424
    Nobel Biocare AB (Medical Supplies)              1,100               17,502
    Sparbanken Svergie, "A" (Financial)              4,300               48,462
    Tornet Fastighet AB (Real Estate)*               4,300                3,167
    Volvo AB,  "B" (Automotive)                      1,400               32,072
                                                                ---------------
                                                               $        270,229
- -------------------------------------------------------------------------------
  United Kingdom -- 11.5%
    Asda Group PLC (Stores)                         30,500     $         52,079
    Capital Radio PLC (Broadcasting)                 2,400               24,768
    Dalgety PLC (Food Products)                      6,200               36,190
    
<PAGE>
   
Portfolio of Investments (Unaudited) - April 30, 1996
Common Stocks - continued
- -------------------------------------------------------------------------------
Issuer                                              Shares                Value
- --------------------------------------------------------------------------------
  United Kingdom -- continued
    Kwik-Fit Holdings PLC (Auto Parts)               1,300     $          4,449
    Lloyds TSB Group PLC (Financial Services)        3,700               17,729
    PowerGen PLC (Utilities - Electric)             10,000               83,945
    PowerGen PLC, 380 P/P (Utilities - Electric)     3,900               24,525
    Storehouse PLC (Retail Department Stores)        6,600               34,057
                                                                ---------------
                                                               $        277,742
- -------------------------------------------------------------------------------
Total Foreign Stocks                                           $      2,090,476
- -------------------------------------------------------------------------------
U.S. Stocks -- 8.4%
  Construction Services -- 0.7%
    Alsons Cement Corp. ## *                       34,000     $         15,958
- -------------------------------------------------------------------------------
  Railroad -- 1.4%
    Canadian National Railway Co.                   1,750     $         33,250
- -------------------------------------------------------------------------------
  Restaurants and Lodging -- 0.9%
    Mandarin Oriental Hotel                        16,000     $         22,720
- -------------------------------------------------------------------------------
  Telecommunications -- 4.1%
    Ericsson, L.M., "B" ADR                         1,100     $         22,413
    Korea Mobile Telecommunications Corp. ##          500               28,500
    Orange PLC, ADR *                                 700               12,600
    Total Access Communications *                   4,000               35,200
                                                                ---------------
                                                              $         98,713
- -------------------------------------------------------------------------------
  Utilities -- Electric 1.3%
    Chilectra SA, ADR                                 600     $         32,700
- -------------------------------------------------------------------------------
Total U.S. Stocks                                             $        203,341
- -------------------------------------------------------------------------------
Total Stocks (Identified Cost, $2,174,329)                    $      2,293,817
- -------------------------------------------------------------------------------

Short-Term Obligation -- 4.1%
- -------------------------------------------------------------------------------
                                                    Principal Amount
                                                       (000 Omitted)
- -------------------------------------------------------------------------------
       Federal Home Loan Mortgage Corp.,
       due 5/01/96, at Amortized Cost           $     100     $        100,000
- -------------------------------------------------------------------------------
Total Investments (Identified Cost,$2,274,329)                       2,393,817

Other Assets, Less Liabilities -- 1.2%                        $         29,220
- -------------------------------------------------------------------------------
Net Assets - 100%                                             $      2,423,037
- -------------------------------------------------------------------------------

See notes to financial statements.
    
<PAGE>
   
Portfolio of Investments (Unaudited) - April 30, 1996
MFS Institutional Mid-Cap Growth Equity Fund
- -------------------------------------------------------------------------------

Common Stocks - 95.2%
- -------------------------------------------------------------------------------
Issuer                                              Shares                Value
- -------------------------------------------------------------------------------
Apparel and Textiles -- 1.0%
  Nine West Group, Inc. *                           2,000     $         85,750
- -------------------------------------------------------------------------------
Banks and Credit Companies -- 1.9%
  Capital One Financial Co.                         3,000     $         88,500
  Northern Trust Co.                                1,300               73,125
                                                               ---------------
                                                              $        161,625
- -------------------------------------------------------------------------------
Business Machines -- 0.6%
  Gateway 2000, Inc. *                              1,300     $         45,337
- -------------------------------------------------------------------------------
Business Services -- 9.0%
  ADT Ltd.                                          5,500     $         93,500
  BISYS Group, Inc. *                               1,300               49,725
  Ceridian Corp. *                                  2,000               95,500
  Computer Sciences, Inc. *                         1,350               99,900
  CUC International, Inc. *                         4,000              131,500
  First USA Paymentech *                              100                4,350
  Fiserv, Inc. *                                    3,250               99,125
  Fanklin Quest Co. *                               3,300               89,100
  SPS Transaction Services Corp. *                  3,300               88,275
                                                               ---------------
                                                               $        750,975
- -------------------------------------------------------------------------------
Cellular Phones -- 0.6%
  Telephone & Data Systems, Inc.                     1,150     $         53,475
- -------------------------------------------------------------------------------
Computer Software -- Personal Computers -- 4.2%
  Autodesk, Inc.                                     4,500     $        183,375
  Electronic Arts, Inc. *                            3,675               98,306
  Symantec Corp. *                                   4,500               72,562
                                                                ---------------
                                                               $        354,243
- -------------------------------------------------------------------------------
Computer Software -- Systems -- 18.8%
  Adobe Systems, Inc.                                3,000     $        129,000
  BMC Software, Inc. *                               3,300              200,887
  Cadence Design Systems, Inc. *                     2,500              130,625
  Compuware Corp. *                                  3,150               89,775
  Davidson & Assoc., Inc. *                          1,300               35,100
  Informix Corp. *                                   4,500              118,687
  Oracle Systems Corp. *                             9,975              336,656
  Sybase, Inc. *                                     5,675              155,353
  Synopsys, Inc. *                                   4,650              191,812
  System Software Associates, Inc.                   8,000              191,000
                                                                ---------------
                                                               $      1,578,895
- -------------------------------------------------------------------------------
Consumer Goods and Services -- 1.5%
  Department 56, Inc. *                              2,300     $         57,212
  Service Corp. International                        1,300               69,063
                                                                ---------------
                                                               $        126,275
- -------------------------------------------------------------------------------
    
<PAGE>
   
Portfolio of Investments (Unaudited) - April 30, 1996
Common Stocks - continued
- -------------------------------------------------------------------------------
Issuer                                              Shares                Value
- -------------------------------------------------------------------------------
Electronics -- 3.7%
  Linear Technology  Corp.                          1,000     $         34,375
  LSI Logic Corp. *                                 3,800              136,800
  Novellus Systems, Inc. *                          1,000               54,250
  Xilinx, Inc. *                                    2,300               84,812
                                                               ---------------
                                                              $        310,237
- -------------------------------------------------------------------------------
Entertainment -- 7.5%
  Grand Casinos, Inc. *                              2,650     $         85,794
  Harrah's Entertainment Corp.  *                    7,150              246,675
  Heritage Media Corp. *                             1,300               49,888
  Infinity Broadcasting Corp., "A" *                 2,300               66,700
  Showboat, Inc.                                     5,500              176,000
                                                                ---------------
                                                               $        625,057
- -------------------------------------------------------------------------------
Financial Institutions -- 6.0%
  Advanta Corp., "B"                                 2,000     $        100,250
  Countrywide Credit Industries, Inc.                2,000               43,250
  Credit Acceptance Corp. *                          2,500               46,875
  Finova Group, Inc.                                 1,300               72,150
  Franklin Resources, Inc.                           2,300              131,675
  Green Tree Financial                               3,300              111,375
                                                                ---------------
                                                               $        505,575
- -------------------------------------------------------------------------------
Medical and Health Technology and Services 15.0%
  Foundation Health Corp. *                          2,150     $         84,119
  Health Management Assoc., Inc. *                   4,500              144,000
  Healthsource, Inc. *                               2,300               78,488
  Healthsouth Corp. *                                2,020               74,993
  Manor Care, Inc.                                   1,850               74,231
  Mariner Health Group, Inc. *                       5,300               90,100
  Mid Atlantic Medical Services, Inc. *              1,550               30,225
  Pacificare Health Systems, Inc., "A" *             3,150              255,150
  St. Jude Medical, Inc.                             3,650              133,225
  United Healthcare Corp.                            4,950              289,575
                                                                ---------------
                                                               $      1,254,106
- -------------------------------------------------------------------------------
Metals and Minerals -- 0.8%
  J & L Specialty Steel                              3,800     $         68,875
- -------------------------------------------------------------------------------
Oils -- 0.3%
  Belco Oil & Gas Corp. *                              800     $         23,100
- -------------------------------------------------------------------------------
Printing and Publishing -- 0.5%
  Pulitzer Publishing Co.                              800     $         45,600
- -------------------------------------------------------------------------------
Railroad -- 1.7%
  Wisconsin Central Transportation Corp. *           1,650     $        139,425
- -------------------------------------------------------------------------------
    
<PAGE>
   
Portfolio of Investments (Unaudited) - April 30, 1996
Common Stocks - continued
- -------------------------------------------------------------------------------
Issuer                                              Shares                Value
- ------------------------------------------------------------------------------
Restaurants and Lodging -- 6.5%
   Applebee's International, Inc.                    4,500     $        119,250
   Buffets, Inc. *                                   3,800               52,725
   HFS, Inc. *                                       4,650              238,894
   Promus Hotel Corp. *                              3,850              109,244
   Renaissance Hotel *                               1,300               24,700
                                                                ---------------
                                                               $        544,813
- -------------------------------------------------------------------------------
Special Products and Services -- 0.9%
   Loewen Group  ##                                  1,000     $         30,109
   Loewen Group, Inc. *                              1,500               44,812
                                                                ---------------
                                                               $         74,921
- -------------------------------------------------------------------------------
Stores -- 5.7%
   AutoZone, Inc. *                                  1,350     $         49,275
   General Nutrition Cos., Inc. *                    5,300              103,350
   Gymboree Corp. *                                  3,000               77,625
   Micro Warehouse, Inc. *                           2,000               86,000
   Office Depot, Inc. *                              7,300              163,338
                                                                ---------------
                                                               $        479,588
- -------------------------------------------------------------------------------
Telecommunications -- 9.0%
   Bay Networks, Inc. *                              1,502     $         47,313
   Cable Design Technologies, Inc. *                   800               26,400
   Cabletron Systems, Inc. *                         1,350              101,757
   Glenayre Technologies, Inc. *                     2,300              106,950
   Paging Network, Inc. *                            3,000               70,500
   Rogers Cantel Mobile Communications, Inc., "B" *  6,800              183,600
   U.S. Robotics Corp. *                               650              101,725
   WorldCom, Inc. *                                  2,467              115,950
                                                                ---------------
                                                               $        754,195
- -------------------------------------------------------------------------------
Total Common Stocks (Identified Cost, $7,628,155)              $      7,982,067
- -------------------------------------------------------------------------------

Convertible Preferred Stock -- 0.0%
- -------------------------------------------------------------------------------
Printing and Publishing --
  Times Mirror Co.,"B" (PERCS)                           6     $            161
- ------------------------------------------------------------------------------
Total Stocks (Identified Cost, $7,628,310)                     $      7,982,228
- ------------------------------------------------------------------------------

Short-Term Obligations -- 60.8%
- -------------------------------------------------------------------------------
                                                    Principal Amount
                                                       (000 Omitted)
- -------------------------------------------------------------------------------
   Federal Home Loan Mortgage Corp.,
   due  5/01/96                                     $3,100     $      3,100,000
   Federal Home Loan Mortgage Corp.,
   due  5/22/96                                     2,000            1,993,957
- -------------------------------------------------------------------------------
Total Short-Term Obligations, at Amortized Cost               $      5,093,957
- -------------------------------------------------------------------------------
Total Investments (Identified Cost, $12,722,267)              $     13,076,185
    
<PAGE>
   
Portfolio of Investments (Unaudited) - April 30, 1996

Other Assets, Less Liabilities -- (56.0)%                     $     (4,694,677)
- -------------------------------------------------------------------------------
  Net Assets - 100%                                           $      8,381,508
- -------------------------------------------------------------------------------

* Non-income producing security.
## SEC Rule 144A security.

See notes to financial statements.
    
<PAGE>
   
Financial Statements
Statements of Assets and Liabilities (Unaudited)
- ------------------------------------------------------------------------------
                                                International      Mid- Cap
                                                   Equity       Growth Equity
April 30, 1996                                       Fund           Fund
- --------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $2,274,329
   and $12,722,267, respectively)                   $  2,393,817  $  13,076,185
  Cash                                                     5,916          7,931
  Foreign currency, at value (identified cost, $679)         679              -
  Receivable for investments sold                         21,148         29,886
  Dividends receivable                                    10,876            157
  Deferred organization expenses                           6,641          6,499
                                                  --------------   ------------
    Total assets                                   $   2,439,077  $  13,120,658
                                                  --------------   ------------
Liabilities:
  Payable for investments purchased                $       7,722  $   4,732,337
  Payable to affiliates for management fee                   190            314
  Accrued expenses and other liabilities                   8,128          6,499
                                                  --------------    -----------
    Total liabilities                              $      16,040  $   4,739,150
                                                  --------------    -----------
Net assets                                         $   2,423,037  $   8,381,508
                                                  ==============    ===========

Net assets consist of:
  Paid-in capital                                  $  2,288,536   $   7,963,442
  Unrealized appreciation on investments
    and translation of assets and liabilities
    in foreign currencies                               119,476         353,918
  Accumulated undistributed net realized
    gain on investments and foreign
    currency transactions                                 2,697          66,370
  Accumulated undistributed net investment
    income (loss)                                        12,328          (2,222)
                                                 --------------   -------------
    Total                                         $   2,423,037   $   8,381,508
                                                 ==============   =============
  Shares of beneficial interest outstanding             227,905         731,884
                                                 ==============   =============

    Net asset value, redemption price and
      offering price per share (net
      assets / shares of beneficial
      interest outstanding)                             $10.63          $11.45
                                                ==============   ==============

See notes to financial statements
    
<PAGE>
   
Financial Statements - continued


Statements of Operations (Unaudited)
- -------------------------------------------------------------------------------
                                                 International       Mid-Cap
                                                    Equity       Growth Equity
Period Ended April 30, 1996*                         Fund              Fund
- -------------------------------------------------------------------------------
Net investment income:
  Income -
    Interest                                      $   5,115       $     4,148
    Dividends                                        12,231             1,643
                                               --------------    --------------
     Total investment income                      $  17,346       $     5,791
                                               --------------    --------------
  Expenses -
    Management fee                                $   3,962       $     6,410
    Trustees' Compensation                            1,250             2,500
    Shareholder servicing agent fee                      38                77
    Registration fees                                15,145            17,980
    Auditing fees                                     6,195             5,196
    Legal fees                                        1,282               410
    Printing                                            833             5,564
    Custodian fee                                       491               483
    Amortization of organization expenses               344               474
    Miscellaneous                                       103               135
                                               --------------    -------------
     Total expenses                              $   29,643      $     39,229
    Fees paid indirectly                               (159)             (211)
    Preliminary reduction of expenses by investment
      adviser                                       (24,466)          (31,005)
                                               --------------    --------------
     Net expenses                               $     5,018      $      8,013
                                               --------------    --------------
      Net investment income (loss)              $    12,328      $     (2,222)
                                               --------------    --------------
Realized and unrealized gain (loss) on investments:
  Realized gain (loss) (identified cost basis) -
   Investment transactions                      $     3,770       $     66,370
   Foreign currency transactions                     (1,073)              -
                                              --------------     --------------
     Net realized gain on investments and
       foreign currency transactions            $     2,697       $     66,370
                                              --------------     --------------
 Change in unrealized appreciation on investments
   and translation of assets and liabilities in
   foreign currencies                          $    119,476       $   353,918
                                              --------------     --------------
     Net realized and unrealized gain on investments
      and foreign currency                     $    122,173       $   420,288
                                              --------------     --------------
      Increase in net assets from operations   $    134,501       $   418,066
                                              ==============     ===============

 *  For the period from the commencement of investment operations, January
    30, 1996 and and December 28, 1995, respectively, to April 30, 1996.

 See notes to financial statements
    
<PAGE>
   
    Financial Statements - continued
    Statements of Changes in Net Assets (Unaudited)
- -------------------------------------------------------------------------------
                                                 International       Mid-Cap
                                                    Equity        Growth Equity
    Period Ended April 30, 1996*                     Fund              Fund
- -------------------------------------------------------------------------------
Increase in net assets:
From operations -
  Net investment income (loss)                 $     12,328       $    (2,222)
  Net realized gain on investments and
    foreign currency transactions                     2,697            66,370
  Net unrealized gain on investments and
    foreign currency translation                    119,476           353,918
                                               -------------     --------------
    Increase in net assets from operations     $    134,501       $   418,066
                                               --------------    --------------
Fund share (principal) transactions -
  Net proceeds from sale of shares             $  2,288,536       $ 7,963,442
                                               --------------    --------------
    Total increase in net assets               $  2,423,037       $ 8,381,508
Net assets:
  At beginning of period                            --                   --
                                               --------------    --------------
  At end of period (including accumulated
    undistributed net investment income (loss)
    of  $12,328 and $(2,222), respectively)    $  2,423,037       $ 8,381,508
                                               ==============    ==============

*  For the period from the  commencement of investment  operations,  January
   30, 1996 and and December 28, 1995, respectively, to April 30, 1996.

    See notes to financial statements
    
<PAGE>
   
Financial Statements - continued
Financial Highlights (Unaudited)
- -------------------------------------------------------------------------------
                                                 International       Mid-Cap
                                                    Equity        Growth Equity
Period Ended April 30, 1996*                         Fund             Fund
- -------------------------------------------------------------------------------
Per share data (for a share outstanding
  throughout the period):
Net asset value - beginning of period          $     10.00        $      10.00
                                              --------------     ---------------
Income from investment operations # -
        Net investment income (loss)ss.        $      0.07        $     (0.01)
        Net realized and unrealized gain
          on investments and foreign
          currency transactions                       0.56               1.46
                                              --------------     ---------------
           Total from investment operations    $      0.63        $      1.45
                                              --------------     ---------------
Net asset value - end of period                $     10.63        $     11.45
                                              ==============     ===============
Total return                                          6.30%++           14.50%++
Ratios (to average net assets)/Supplemental data:ss.
        Expenses                                      0.95%++            0.75%+
        Net investment income (loss)                  2.34%+            (0.21)%+
Portfolio turnover                                       5%                 26%
Average Commission rate                        $      0.0195     $       0.0491
Net assets at end of period (000 omitted)      $       2,423     $        8,382

      * For the period from the commencement of investment  operations,  January
        30, 1996 and and December 28, 1995, respectively, to April 30, 1996.
      + Annualized.
     ++ Not annualized.
      # Per share data is based on average shares outstanding.
      ss. The Adviser  voluntarily  agreed to maintain the expenses of the Funds
        at not more than .95% and .75%,  respectively,  of each  Fund's  average
        daily  net  assets.  To the  extent  actual  expenses  were  over  these
        limitations, the net investment loss per share and the ratios would have
        been:


          Net investment loss                  $     (0.07)      $      (0.10)
          Ratios (to average net assets):
            Expenses                                  5.63%+             3.68%+
            Net investment loss                      (2.33)%+           (3.14)%+

See notes to financial statements
    
<PAGE>
   
Notes to Financial Statements - (Unaudited)

(1) Business and Organization
MFS  Institutional  International  Equity Fund (the Fund) and MFS  Institutional
Mid-Cap   Growth  Equity  Fund  (the  Fund)  are   diversified   series  of  MFS
Institutional  Trust (the  Trust).  The Trust is  organized  as a  Massachusetts
business trust and is registered  under the  Investment  Company Act of 1940, as
amended, as an open-end management investment company

(2)  Significant Accounting Policies
Investment  Valuations - Equity  securities  listed on  securities  exchanges or
reported  through  the NASDAQ  system are valued at last sale  prices.  Unlisted
equity securities or listed equity securities for which last sale prices are not
available are valued at last quoted bid prices.  Short-term  obligations,  which
mature in 60 days or less,  are valued at  amortized  cost,  which  approximates
market value.

Foreign  Currency  Translation  -  Investment  valuations,   other  assets,  and
liabilities  initially  expressed  in  foreign  currencies  are  converted  each
business day into U.S. dollars based upon current exchange rates.  Purchases and
sales of foreign  investments  and income and expenses are  converted  into U.S.
dollars based upon currency exchange rates prevailing on the respective dates of
such  transactions.  Gains and losses  attributable to foreign currency exchange
rates on sales of securities  are recorded for financial  statement  purposes as
net realized gains and losses on investments.  Gains and losses  attributable to
foreign  exchange  rate  movements  on income  and  expenses  are  recorded  for
financial  statement purposes as foreign currency  transaction gains and losses.
That portion of both  realized and  unrealized  gains and losses on  investments
that  results  from  fluctuations  in  foreign  currency  exchange  rates is not
separately disclosed.

Deferred  Organization Expenses - Costs incurred by each Fund in connection with
its  organization  have been deferred and are being amortized on a straight-line
basis  over  a  five-year  period  beginning  on the  date  of  commencement  of
operations of the Fund.

Investment Transactions and Income - Investment transactions are recorded on the
trade date.  Interest  income is recorded on the accrual basis.  All premium and
original issue  discount are amortized or accreted for both financial  statement
and tax  reporting  purposes  as  required  by federal  income tax  regulations.
Dividend  income is recorded on the ex-dividend  date for dividends  received in
cash.  Dividend and interest  payments  received in  additional  securities  are
recorded on the ex-dividend or ex-interest  date in an amount equal to the value
of the security on such date.

Fees Paid  Indirectly - Each Fund's  custodian bank  calculates its fee based on
the Fund's  average  daily net  assets.  The fee is reduced  according  to a fee
arrangement,  which  provides for custody fees to be reduced  based on a formula
developed to measure the value of cash deposited with the custodian by the Fund.
This amount is shown as a reduction of expenses on the Statement of Operations.

Tax  Matters  and  Distributions  - The  Trust's  policy is to  comply  with the
provisions  of the  Internal  Revenue  Code (the Code)  applicable  to regulated
investment  companies  and to  distribute  to  shareholders  all of its  taxable
income,  including  any  net  realized  gain  on  investments.  Accordingly,  no
provision  for federal  income or excise tax is provided.  Each Fund files a tax
return annually using tax accounting  methods  required under  provisions of the
Code which may differ from generally accepted accounting  principles,  the basis
on which these financial statements are prepared. Accordingly, the amount of net
investment  income and net realized gain reported on these financial  statements
may differ from that  reported on the Fund's tax return and,  consequently,  the
character of distributions to shareholders  reported in the financial highlights
may differ from that reported to  shareholders  on Form 1099-DIV.  Foreign taxes
have been provided on interest and dividend income earned on foreign investments
in  accordance  with the  applicable  country's  tax rates  and,  to the  extent
unrecoverable,  are recorded as a reduction of investment income.  Distributions
to shareholders are recorded on the ex-dividend date.
    
<PAGE>
   
Notes to Financial Statements - (Unaudited) - continued

Each Fund  distinguishes  between  distributions  on a tax basis and a financial
reporting  basis and  requires  that only  distributions  in excess of tax basis
earnings and profits are  reported in the  financial  statements  as a return of
capital.  Differences in the recognition or classification of income between the
financial  statements  and tax  earnings  and profits  which result in temporary
over-distributions   for  financial  statement   purposes,   are  classified  as
distributions  in excess of net investment  income or  accumulated  net realized
gains.

(3) Transactions with Affiliates
Investment  Adviser - The  Funds  have an  investment  advisory  agreement  with
Massachusetts  Financial  Services  Company (MFS) to provide overall  investment
advisory  and  administrative  services,  and  general  office  facilities.  The
management fee,  computed daily and paid monthly at an effective  annual rate of
0.75% of average  daily net assets for MFS  Institutional  International  Equity
Fund and 0.60% of average daily net assets for MFS Institutional  Mid-Cap Growth
Equity Fund.

Under a temporary expense reimbursement  agreement with MFS, MFS has voluntarily
agreed to pay all of the Fund's operating expenses,  exclusive of management and
distribution  fees. The Funds in turn will pay MFS an expense  reimbursement fee
not  greater  than  0.20% of  average  daily net  assets  for MFS  Institutional
International  Equity  Fund and  0.15%  of  average  daily  net  assets  for MFS
Institutional  Mid-Cap  Growth  Equity  Fund.  To the  extent  that the  expense
reimbursement fee exceeds the Fund's actual expenses, the excess will be applied
to  amounts  paid by MFS in  prior  years.  At April  30,  1996,  the  aggregate
unreimbursed expenses owed to MFS by the Funds amounted to:

                                                Mid-Cap
                          International          Growth
                                 Equity          Equity
                                   Fund            Fund
                       ----------------- ---------------
                                $24,466         $31,005

Each Fund pays no compensation  directly to its Trustees who are officers of the
investment   adviser,  or  to  officers  of  each  Fund,  all  of  whom  receive
remuneration  for their services to each Fund from MFS.  Certain of the officers
and  Trustees  of the Fund are  officers  or  directors  of MFS and MFS  Service
Center, Inc. (MFSC).

Shareholder  Servicing  Agent - MFSC, a wholly owned  subsidiary of MFS, earns a
fee for its services as shareholder  servicing agent. The fee is calculated as a
percentage of the average  daily net assets of each Fund at an effective  annual
rate of 0.0075%.

(4) Portfolio Securities
Purchases and sales of investments, other than purchased option transactions and
short-term obligations, were as follows:

                                                            Mid-Cap
                                     International           Growth
                                            Equity           Equity
                                              Fund             Fund
- --------------------------------- ----------------- ----------------
Purchases
U.S. government
   securities                       $       --       $       --
                                  ================= ================
Investments (non-U.S.
  government securities)            $   2,248,727    $    8,449,154
                                  ================= ================

Sales
U.S. government
   securities                       $      --        $       --
                                  ================= ================
Investments (non-U.S.
  government securities)            $      74,398    $      887,213
                                  ================= ================
    
<PAGE>
   

Notes to Financial Statements - (Unaudited) - continued
The cost and unrealized appreciation or depreciation in value of the investments
owned by the Funds, as computed on a federal income tax basis, are as follows:

                                                            Mid-Cap
                                     International           Growth
                                            Equity           Equity
                                              Fund             Fund
- ---------------------------------
                                  ================= ================
Aggregate cost                     $     2,274,329   $   12,722,267
                                  ================= ================
Gross unrealized
 appreciation                      $       142,900   $      448,047
Gross unrealized
 depreciation                             (23,412)         (94,129)
                                  ----------------- ----------------
   Net unrealized
   appreciation                   $        119,488   $     353,918
                                  ================= ================

5) Shares of Beneficial Interest
The  Declaration  of Trust permits the Trustees to issue an unlimited  number of
full  and  fractional  shares  of  beneficial   interest  (without  par  value).
Transactions in Fund shares were as follows:


                                         International                  Mid-Cap
Period Ended                                 Equity               Growth Equity
April 30,                                     Fund                        Fund
                                  ------------------------- -------------------
1996*                              Shares     Amount         Shares     Amount
- ---------------------------------
                                  ========================= ===================
Shares sold                        227,905   $2,288,536     731,884  $7,963,442
                                  ========================= ===================

  * For the period from the commencement of investment  operations,  January 30,
    1996 and December 28, 1995, respectively, to April 30, 1996.

(6) Line of Credit
The  Trust  entered  into  an  agreement  which  enables  each of the  Funds  to
participate  with other funds managed by MFS in an unsecured line of credit with
a bank which permits borrowings up to $350 million, collectively. Borrowings may
be made to  temporarily  finance  the  repurchase  of Fund  shares.  Interest is
charged to each  fund,  based on its  borrowings,  at a rate equal to the bank's
base rate.  In addition,  a commitment  fee,  based on the average  daily unused
portion of the line of credit, is allocated among the participating funds at the
end of each quarter.  The commitment fee allocated to International  Equity Fund
and Mid-Cap Growth Equity Fund was $9 and $14, respectively.

(7)  Restricted Securities
The Fund may invest not more than 15% of its net assets in securities  which are
subject to legal or contractual  restrictions on resale.  At April 30, 1996, the
International  Equity Fund and Mid-Cap  Growth  Equity Fund owned the  following
restricted   securities   (consisting   of  2.82%  and  0.36%  of  net   assets,
respectively)  which may not be publicly  sold  without  registration  under the
Securities Act of 1933 (the 1933 Act). The International Equity Fund and Mid-Cap
Growth  Equity  Fund do not have the right to demand  that  such  securities  be
registered.  The value of these securities is determined by valuations  supplied
by a pricing service or brokers or, if not available, in good faith by or at the
direction of the Trustees.  All of these  securities  may be offered and sold to
"qualified institutional buyers" under Rule 144A of the 1933 Act.

                                            Date of
                     Description          Acquisition  Shares     Cost    Value

International    Alsons Cement Corp.     2/23-4/29/96  34,000  $14,697  $15,958
  Equity Fund    Cosco Pacific Ltd.      2/13-4/09/96  34,000   27,173   23,957
                 Korea Mobile Tel. Corp. 2/23-4/29/96     500   23,500   28,500
                                                                        =======
                                                                        $68,415
                                                                        =======
Mid-Cap Growth
  Equity Fund
                 Loewen Group            3/13/96        1,000  $28,727  $30,109
                                                                        =======
    
<PAGE>

                                     PART C

Item 24. Financial Statements and Exhibits

         (a)      Financial Statements
   
                  MFS Institutional International Equity Fund

                  Included in Part A of  this  Registration  Statement:
                    For the period from January 30, 1996, commencement of
                    operations, to April 30, 1996:
                      Financial Highlights

                  Included in Part B of this  Registration  Statement:
                    At April 30, 1996:
                       Portfolio of Investments
                       Statement of Assets and Liabilities

                    For the period from January 30, 1996, commencement of
                    operations, to April 30, 1996:
                       Statement of Operations
                       Statement of Changes in Net Assets

                  MFS Institutional Mid-Cap Growth Equity Fund

                  Included in Part A of  this  Registration  Statement:
                    For the period from December 28, 1995, commencement of
                    operations, to April 30, 1996:
                      Financial Highlights

                  Included in Part B of this  Registration  Statement:
                    At April 30, 1996:
                      Portfolio of Investments
                      Statement of Assets and Liabilities

                    For the period from  December 28, 1995,  commencement
                    of operations, to April 30, 1996:
                      Statement of Operations
                      Statement of Changes in Net Assets
    
         (b)      Exhibits on Behalf of MFS Institutional Trust

                   1       (a)      Declaration of Trust, dated September 13,
                                    1990.  (1)

                           (b)      Certificate of Amendment to Declaration of
                                    Trust, dated June 1, 1992.  (1)

                           (c)      Amendment No. 2 to the Declaration of
                                    Trust, dated August 13, 1992.  (1)
<PAGE>
                           (d)      Amendment to Declaration of Trust -
                                    Designation of Series, dated May 16,
                                    1995.  (1)

                           (e)      Amendment to Declaration of Trust -
                                    Designation of Series, dated August 29,
                                    1995.  (2)

                           (f)      Amendment to Declaration of Trust -
                                    Redesignation of Series, dated October 31,
                                    1995. (7)

                           (g)      Amendment to Declaration of Trust -
                                    Redesignation of Series, dated November
                                    28, 1995.  (7)
   
                           (h)      Amendment to Declaration of Trust -
                                    Redesignation of Series, dated April 24,
                                    1996.  (8)
    
                   2       (a)      Amended and Restated By-Laws, dated June
                                    1, 1992.  (5)

                           (b)      Amendment No. 1 to Amended and
                                    Restated By-Laws, dated October 14,
                                    1993.  (5)

                   3                Not Applicable.

                   4                Form of Share Certificate for Class A,
                                    Class B and Class C Shares.  (4)

                   5       (a)      Investment Advisory Agreement between
                                    MFS Emerging Equities Fund and
                                    Massachusetts Financial Services Company,
                                    as adviser, dated August 7, 1992.  (5)

                           (b)      Investment Advisory Agreement between
                                    MFS Worldwide Fixed Income Fund and
                                    Massachusetts Financial Services Company,
                                    as adviser, dated August 7, 1992.  (5)

                           (c)      Investment Advisory Agreement between
                                    the Registrant, on behalf of MFS
                                    Institutional Emerging Markets Fixed
                                    Income Fund, and Massachusetts Financial
                                    Services Company, as adviser.  (1)

                           (d)      Investment Advisory Agreement between
                                    the Registrant, on behalf of MFS
                                    Institutional Core Plus Fixed Income Fund,
                                    and Massachusetts Financial Services
                                    Company, as adviser.  (7)

                           (e)      Investment Advisory Agreement between
                                    the Registrant, on behalf of MFS
                                    Institutional Research Fund, and
                                    Massachusetts Financial Services Company,
                                    as adviser.  (7)
<PAGE>
                           (f)      Investment Advisory Agreement between
                                    the Registrant, on behalf of MFS
                                    Institutional Mid-Cap Growth Equity Fund,
                                    and Massachusetts Financial Services
                                    Company, as adviser.  (7)

                           (g)      Investment Advisory Agreement between
                                    the Registrant, on behalf of MFS
                                    Institutional International Equity Fund,
                                    and Massachusetts Financial Services
                                    Company, as adviser.  (7)

                   6                Not Applicable.

                   7                Not Applicable.

                   8       (a)      Custodian Agreement between the
                                    Registrant and State Street Bank and Trust
                                    Company, dated July 31, 1995. (2)

                           (b)      Amendment to Custodian Contract dated
                                    November 30, 1995.  (7)

                   9       (a)      Amended and Restated Shareholder
                                    Servicing Agent Agreement between
                                    Registrant and MFS Service Center, Inc. as
                                    Shareholder Servicing Agent dated
                                    November 30, 1995.  (7)

                           (b)      Exchange Privilege Agreement between the
                                    MFS Institutional Trust, on behalf of each
                                    of its series, and MFS Fund Distributors,
                                    Inc.  (7)

                           (c)      Dividend Disbursing Agency Agreement
                                    between the Registrant and State Street
                                    Bank and Trust Company, dated October 31,
                                    1990.  (5)

                           (d)      Loan Agreement by and among the Banks
                                    named therein, the MFS Funds named
                                    therein and The First National Bank of
                                    Boston, dated February 21, 1995.  (6)

                  10                Consent and Opinion of Counsel filed with
                                    Registrant's Rule 24f-2 Notice for the
                                    fiscal year ended June 30, 1995 on August
                                    29, 1995.

                  11                Consent of Deloitte & Touche LLP.  (5)

                  12                Not Applicable.

                  13       (a)      Investment representation letter from
                                    initial shareholder of MFS Institutional
                                    Emerging Markets Fixed Income Fund.  (1)

                  14                Not Applicable.
<PAGE>

                  15                Distribution Agreement by and between
                                    MFS Institutional Trust and MFS Fund
                                    Distributors, Inc., dated June 15, 1994. (5)

                  16                Schedule of Computation for Performance
                                    Quotations - Aggregate Total Rate of
                                    Return, Average Annual Total Rate of
                                    Return and Yield Calculations.  (3)
   
                  17                Financial Data Schedules for MFS
                                    Institutional International Equity Fund
                                    and MFS Institutional Mid-Cap Growth Equity
                                    Fund; filed herewith.

                  18                Not Applicable.
    
                  Power of Attorney dated August 12, 1994.  (5)

(1)   Incorporated by reference to Post-Effective Amendment No. 7 to the
      Registrant's Registration Statement on Form N-1A filed with the SEC via
      EDGAR on May 18, 1995.
(2)   Incorporated by reference to Post-Effective Amendment No. 8 to the
      Registrant's Registration Statement on Form N-1A filed with the SEC via
      EDGAR on September 15, 1995.
(3)   Incorporated by reference to MFS Municipal Series Trust (File Nos.
      2-92915 and 811-4096) Post-Effective Amendment No. 26 filed with the SEC
      via EDGAR on February 22, 1995.
(4)   Incorporated by reference to MFS Municipal Series Trust (File Nos.
      2-92915 and 811-4096) Post-Effective Amendment No. 28 filed with the SEC
      via EDGAR on July 28, 1995.
   
(5)   Incorporated by reference to Post-Effective Amendment No. 9 filed with
      the SEC via EDGAR on October 27, 1995.
    
(6)   Incorporated by reference to Post-Effecitve Amendment No. 28 on Form N-2
      for MFS Municipal Income Trust (File No. 811-4841), filed with the SEC
      via EDGAR on February 28, 1995.
   
(7)   Incorporated by reference to Post-Effective Amendment No. 10 to the
      Registrant's Registration Statement on Form N-1A filed with the SEC via
      EDGAR on February 8, 1996.
(8)   Incorporated by reference to Post-Effective Amendment No. 11 to the
      Registrant's Registration Statement on Form N-1A filed with the SEC via
      EDGAR on April 26, 1996.
    
Item 25. Persons Controlled by or under Common Control with Registrant

         Not applicable

Item 26. Number of Holders of Securities

         MFS Institutional Emerging Equities Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders

         Shares of Beneficial Interest               35
   
         (without par value)                (as of May 31, 1996)
    
<PAGE>
         MFS Institutional Worldwide Fixed Income Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders

         Shares of Beneficial Interest               16
   
         (without par value)                (as of May 31, 1996)
    
         MFS Institutional Emerging Markets Income Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders

         Shares of Beneficial Interest                4
   
         (without par value)                (as of May 31, 1996)
    
         MFS Institutional Core Plus Fixed Income Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders

         Shares of Beneficial Interest                3
   
         (without par value)                (as of May 31, 1996)
    
         MFS Institutional Research Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders
   
         Shares of Beneficial Interest                4
         (without par value)                (as of May 31, 1996)
    
         MFS Institutional Mid-Cap Growth Equity Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders
   
         Shares of Beneficial Interest                5
         (without par value)                (as of May 31, 1996)
    
<PAGE>

         MFS Institutional International Equity Fund

                  (1)                                (2)
         Title of Class                     Number of Record Holders
   
         Shares of Beneficial Interest                5
         (without par value)                (as of May 31, 1996)
    
Item 27. Indemnification

         Article V of the  Registrant's  Declaration  of Trust provides that the
Registrant  will  indemnify its Trustees and officers  against  liabilities  and
expenses  incurred in connection  with  litigation in which they may be involved
because  of their  offices  with the  Trust,  unless  as to  liabilities  to the
Registrant or its shareholders,  it is finally  adjudicated that they engaged in
willful  misfeasance,  bad faith,  gross negligence or reckless disregard of the
duties  involved in their  offices,  or with respect to any matter  unless it is
adjudicated  that they did not act in good faith in the  reasonable  belief that
their  actions  were in the best  interest of the  Registrant.  In the case of a
settlement,  such  indemnification  will  not be  provided  unless  it has  been
determined in  accordance  with the  Declaration  of Trust that such officers or
Trustees have not engaged in willful misfeasance, bad faith, gross negligence or
reckless disregard of the duties involved in their offices.

         The Trustees and officers of the  Registrant  and the  personnel of the
Registrant's  investment  adviser  are  insured  under an errors  and  omissions
liability  insurance  policy.  The  Registrant and its officers are also insured
under the fidelity bond required by Rule 17g-1 under the Investment  Company Act
of 1940, as amended.

Item 28. Business and Other Connections of Investment Adviser
   
         MFS  serves as  investment  adviser  to the  following  open-end  Funds
comprising the MFS Family of Funds: Massachusetts Investors Trust, Massachusetts
Investors  Growth Stock Fund,  MFS Growth  Opportunities  Fund,  MFS  Government
Securities Fund, MFS Government Limited Maturity Fund, MFS Series Trust I (which
has eight series:  MFS Managed  Sectors Fund,  MFS Cash Reserve Fund,  MFS World
Asset  Allocation  Fund,  MFS Aggressive  Growth Fund,  MFS Research  Growth and
Income  Fund,  MFS Core  Growth  Fund,  MFS Equity  Income  Fund and MFS Special
Opportunities  Fund),  MFS Series Trust II (which has four series:  MFS Emerging
Growth Fund, MFS Capital Growth Fund, MFS Intermediate  Income Fund and MFS Gold
& Natural Resources Fund), MFS Series Trust III (which has two series:  MFS High
Income Fund and MFS Municipal High Income Fund),  MFS Series Trust IV (which has
four series:  MFS Money  Market  Fund,  MFS  Government  Money Market Fund,  MFS
Municipal Bond Fund and MFS OTC Fund), MFS Series Trust V (which has two series:
MFS Total  Return Fund and MFS  Research  Fund),  MFS Series Trust VI (which has
three  series:  MFS World Total Return Fund,  MFS  Utilities  Fund and MFS World
Equity Fund), MFS Series Trust VII (which has two series:  MFS World Governments
Fund and MFS Value  Fund),  MFS Series  Trust VIII  (which has two  series:  MFS
Strategic Income Fund and MFS World Growth Fund), MFS Series Trust IX (which has
three series: MFS Bond Fund, MFS Limited Maturity Fund and MFS Municipal Limited
Maturity  Fund),  MFS Series  Trust X (which  has four  series:  MFS  Government
Mortgage Fund,  MFS/Foreign & Colonial Emerging Markets Equity Fund, MFS/Foreign
& Colonial  International  Growth Fund and MFS/Foreign & Colonial  International
Growth and Income Fund),  and MFS  Municipal  Series Trust (which has 16 series:
MFS  Alabama  Municipal  Bond  Fund,  MFS  Arkansas  Municipal  Bond  Fund,  MFS
California  Municipal  Bond Fund,  MFS Florida  Municipal Bond Fund, MFS Georgia
Municipal  Bond  Fund,  MFS  Maryland  Municipal  Bond Fund,  MFS  Massachusetts
Municipal Bond Fund, MFS Mississippi Municipal Bond Fund, MFS New York Municipal
Bond Fund, MFS North Carolina  Municipal Bond Fund, MFS  Pennsylvania  Municipal
Bond Fund, MFS South Carolina Municipal Bond Fund, MFS Tennessee  Municipal Bond
Fund, MFS Virginia  Municipal  Bond Fund, MFS West Virginia  Municipal Bond Fund
and MFS Municipal Income Fund) (the "MFS Funds"). The principal business address
of  each  of  the   aforementioned   Funds  is  500  Boylston  Street,   Boston,
Massachusetts 02116.

         MFS  also  serves  as  investment  adviser  of the  following  no-load,
open-end Funds: MFS Institutional Trust ("MFSIT") (which has seven series),  MFS
Variable  Insurance  Trust  ("MVI")  (which  has  twelve  series)  and MFS Union
Standard Trust ("UST") (which has two series). The principal business address of
each of the aforementioned Funds is 500 Boylston Street,  Boston,  Massachusetts
02116.

         In  addition,  MFS  serves  as  investment  adviser  to  the  following
closed-end Funds: MFS Municipal Income Trust, MFS Multimarket  Income Trust, MFS
Government  Markets Income Trust,  MFS  Intermediate  Income Trust,  MFS Charter
Income  Trust and MFS Special  Value  Trust (the "MFS  Closed-End  Funds").  The
principal business address of each of the  aforementioned  Funds is 500 Boylston
Street, Boston, Massachusetts 02116.
    
<PAGE>
   
         Lastly,  MFS serves as investment  adviser to MFS/Sun Life Series Trust
("MFS/SL"),  Sun Growth Variable  Annuity Funds,  Inc.  ("SGVAF"),  Money Market
Variable Account,  High Yield Variable Account,  Capital  Appreciation  Variable
Account,  Government  Securities  Variable Account,  World Governments  Variable
Account, Total Return Variable Account and Managed Sectors Variable Account. The
principal  business  address of each is One Sun Life Executive  Park,  Wellesley
Hills, Massachusetts 02181.

         MFS International  Ltd. ("MIL"),  a limited liability company organized
under  the laws of the  Republic  of  Ireland  and a  subsidiary  of MFS,  whose
principal  business  address is 41-45 St.  Stephen's  Green,  Dublin 2, Ireland,
serves as  investment  adviser to and  distributor  for MFS  International  Fund
(which has four  portfolios:  MFS  International  Funds-U.S.  Equity  Fund,  MFS
International  Funds-U.S.  Emerging Growth Fund, MFS International  Funds-Global
Governments  Fund, MFS  International  Funds - U.S.  Dollar Reserve Fund and MFS
International  Funds-Charter  Income Fund) (the "MIL Funds").  The MIL Funds are
organized in Luxembourg and qualify as an undertaking for collective investments
in transferable  securities  (UCITS).  The principal business address of the MIL
Funds is 47, Boulevard Royal, L-2449 Luxembourg.

         MIL also  serves  as  investment  adviser  to and  distributor  for MFS
Meridian  U.S.  Government  Bond Fund,  MFS Meridian  Charter  Income Fund,  MFS
Meridian  Global  Government  Fund, MFS Meridian U.S.  Emerging Growth Fund, MFS
Meridian  Global Equity Fund, MFS Meridian  Limited  Maturity Fund, MFS Meridian
World Growth  Fund,  MFS Meridian  Money Market Fund,  MFS Meridian  World Total
Return  Fund,  MFS Meridian  U.S.  Equity Fund and MFS  Meridian  Research  Fund
(collectively  the "MFS  Meridian  Funds").  Each of the MFS  Meridian  Funds is
organized  as an  exempt  company  under  the laws of the  Cayman  Islands.  The
principal  business  address of each of the MFS Meridian  Funds is P.O. Box 309,
Grand Cayman, Cayman Islands, British West Indies.

         MFS  International  (U.K.) Ltd.  ("MIL-UK"),  a private limited company
registered  with the  Registrar of Companies for England and Wales whose current
address is 4 John  Carpenter  Street,  London,  England  ED4Y 0NH,  is  involved
primarily  in  marketing  and  investment  research  activities  with respect to
private clients and the MIL Funds and the MFS Meridian Funds.

         MFS Fund Distributors, Inc. ("MFD"), a wholly owned subsidiary of
MFS, serves as distributor for the MFS Funds, MVI, UST and MFSIT.

         Clarendon Insurance Agency, Inc. ("CIAI"), a wholly owned subsidiary
of MFS, serves as distributor for certain life insurance and annuity contracts
issued by Sun Life Assurance Company of Canada (U.S.).

         MFS Service Center, Inc. ("MFSC"), a wholly owned subsidiary of MFS,
serves as shareholder servicing agent to the MFS Funds, the MFS Closed-End
Funds, MFSIT, MVI and UST.

         MFS Asset Management, Inc. ("AMI"), a wholly owned subsidiary of MFS,
provides investment advice to substantial private clients.

         MFS Retirement Services, Inc. ("RSI"), a wholly owned subsidiary of
MFS, markets MFS products to retirement plans and provides administrative and
record keeping services for retirement plans.
    
<PAGE>
   
         MFS

         The Directors of MFS are A. Keith Brodkin, Jeffrey L. Shames, Arnold
D. Scott, John R. Gardner and John D. McNeil.  Mr. Brodkin is the Chairman,
Mr. Shames is the President, Mr. Scott is a Senior Executive Vice President
and Secretary, Bruce C. Avery, William S. Harris, William W. Scott, Jr., and
Patricia A. Zlotin are Executive Vice Presidents, Stephen E. Cavan is a Senior
Vice President, General Counsel and an Assistant Secretary, Joseph W. Dello
Russo is a Senior Vice President, Chief Financial Officer and Treasurer,
Robert T. Burns is a Vice President, Associate General Counsel and an
Assistant Secretary of MFS, and Thomas B. Hastings is a Vice President and
Assistant Treasurer.

         Massachusetts Investors Trust
         Massachusetts Investors Growth Stock Fund
         MFS Growth Opportunities Fund
         MFS Government Securities Fund
         MFS Series Trust I
         MFS Series Trust V
         MFS Series Trust VI
         MFS Series Trust X
         MFS Government Limited Maturity Fund

         A. Keith Brodkin is the Chairman and President, Stephen E. Cavan is
the Secretary, W. Thomas London is the Treasurer, James O. Yost, Vice
President of MFS, is the Assistant Treasurer, James R. Bordewick, Jr., Vice
President and Associate General Counsel of MFS, is the Assistant Secretary.

         MFS Series Trust II

         A. Keith Brodkin is the Chairman and President, Leslie J. Nanberg,
Senior Vice President of MFS, is a Vice President, Stephen E. Cavan is the
Secretary, W. Thomas London is the Treasurer, James O. Yost is the Assistant
Treasurer, and James R. Bordewick, Jr., is the Assistant Secretary.

         MFS Government Markets Income Trust
         MFS Intermediate Income Trust

         A. Keith Brodkin is the Chairman and President, Patricia A. Zlotin,
Executive Vice President of MFS and Leslie J. Nanberg, Senior Vice President
of MFS, are Vice Presidents, Stephen E. Cavan is the Secretary, W. Thomas
London is the Treasurer, James O. Yost is the Assistant Treasurer, and James
R. Bordewick, Jr., is the Assistant Secretary.

         MFS Series Trust III

         A. Keith Brodkin is the Chairman and President, James T. Swanson,
Robert J. Manning, Cynthia M. Brown and Joan S. Batchelder, Senior Vice
Presidents of MFS, Bernard Scozzafava, Vice President of MFS, and Matthew
Fontaine, Assistant Vice President of MFS, are Vice Presidents, Sheila
Burns-Magnan and Daniel E. McManus, Assistant Vice Presidents
    
<PAGE>
   
of MFS, are Assistant Vice  Presidents,  Stephen E. Cavan is the  Secretary,  W.
Thomas London is the Treasurer,  James O. Yost is the Assistant  Treasurer,  and
James R. Bordewick, Jr., is the Assistant Secretary.

         MFS Series Trust IV
         MFS Series Trust IX

         A. Keith Brodkin is the Chairman and President, Robert A. Dennis and
Geoffrey L. Kurinsky, Senior Vice Presidents of MFS, are Vice Presidents,
Stephen E. Cavan is the Secretary, W. Thomas London is the Treasurer, James O.
Yost is the Assistant Treasurer and James R. Bordewick, Jr., is the Assistant
Secretary.

         MFS Series Trust VII

         A. Keith Brodkin is the Chairman and President, Leslie J. Nanberg and
Stephen C. Bryant, Senior Vice Presidents of MFS, are Vice Presidents, Stephen
E. Cavan is the Secretary, W. Thomas London is the Treasurer, James O. Yost is
the Assistant Treasurer and James R. Bordewick, Jr., is the Assistant
Secretary.

         MFS Series Trust VIII

         A. Keith Brodkin is the Chairman and President, Jeffrey L. Shames,
Leslie J. Nanberg, Patricia A. Zlotin, James T. Swanson and John D.
Laupheimer, Jr., Vice President of MFS, are Vice Presidents, Stephen E. Cavan
is the Secretary, W. Thomas London is the Treasurer, James O. Yost is the
Assistant Treasurer and James R. Bordewick, Jr., is the Assistant Secretary.

         MFS Municipal Series Trust

         A. Keith Brodkin is the Chairman and President, Cynthia M. Brown and
Robert A. Dennis are Vice Presidents, David B. Smith, Geoffrey L. Schechter
and David R. King, Vice Presidents of MFS, are Vice Presidents, Daniel E.
McManus, Assistant Vice President of MFS, is an Assistant Vice President,
Stephen E. Cavan is the Secretary, W. Thomas London is the Treasurer, James O.
Yost is the Assistant Treasurer and James R. Bordewick, Jr., is the Assistant
Secretary.

         MFS Variable Insurance Trust
         MFS Union Standard Trust
         MFS Institutional Trust

         A. Keith Brodkin is the Chairman and President, Stephen E. Cavan is
the Secretary, W. Thomas London is the Treasurer, James O. Yost is the
Assistant Treasurer and James R. Bordewick, Jr., is the Assistant Secretary.

         MFS Municipal Income Trust

         A. Keith Brodkin is the Chairman and President, Cynthia M. Brown and
Robert J. Manning are Vice Presidents, Stephen E. Cavan is the Secretary, W.
Thomas London is the Treasurer, James O. Yost, is the Assistant Treasurer and
James R. Bordewick, Jr., is the Assistant Secretary.
    
<PAGE>
   
         MFS Multimarket Income Trust
         MFS Charter Income Trust

         A. Keith Brodkin is the Chairman and President, Patricia A. Zlotin,
Leslie J. Nanberg and James T. Swanson are Vice Presidents, Stephen E. Cavan
is the Secretary, W. Thomas London is the Treasurer, James O. Yost, Vice
President of MFS, is the Assistant Treasurer and James R. Bordewick, Jr., is
the Assistant Secretary.

         MFS Special Value Trust

         A. Keith Brodkin is the Chairman and President, Jeffrey L. Shames,
Patricia A. Zlotin and Robert J. Manning are Vice Presidents, Stephen E. Cavan
is the Secretary, W. Thomas London is the Treasurer, and James O. Yost, is the
Assistant Treasurer and James R. Bordewick, Jr., is the Assistant Secretary.

         SGVAF

         W. Thomas London is the Treasurer.

         MIL

         A. Keith Brodkin is a Director and the Chairman, Arnold D. Scott and
Jeffrey L. Shames are Directors, Ziad Malek, Senior Vice President of MFS, is
the President, Thomas J. Cashman, Jr., a Senior Vice President of MFS, is a
Senior Vice President, Stephen E. Cavan is a Director, Senior Vice President
and the Clerk, James R. Bordewick, Jr. is a Director, Vice President and an
Assistant Clerk, Robert T. Burns is an Assistant Clerk, Joseph W. Dello Russo
is the Treasurer and Thomas B. Hastings is the Assistant Treasurer.

         MIL-UK

         A. Keith Brodkin is a Director and the Chairman, Arnold D. Scott,
Jeffrey L. Shames, and James R. Bordewick, Jr., are Directors, Stephen E.
Cavan is a Director and the Secretary, Ziad Malek is the President, James E.
Russell is the Treasurer, and Robert T. Burns is the Assistant Secretary.

         MIL Funds

         A. Keith Brodkin is the Chairman, President and a Director, Richard
B. Bailey, John A. Brindle, Richard W. S. Baker and William F. Waters are
Directors, Stephen E. Cavan is the Secretary, W. Thomas London is the
Treasurer, James O. Yost is the Assistant Treasurer and James R. Bordewick,
Jr., is the Assistant Secretary, and Ziad Malek is a Senior Vice President.

         MFS Meridian Funds

         A. Keith Brodkin is the Chairman, President and a Director, Richard
B. Bailey, John A. Brindle, Richard W. S. Baker, Arnold D. Scott, Jeffrey L.
Shames and William F. Waters are Directors,
    
<PAGE>
   
Stephen E. Cavan is the Secretary,  W. Thomas London is the Treasurer,  James R.
Bordewick,  Jr.,  is the  Assistant  Secretary,  James O. Yost is the  Assistant
Treasurer, and Ziad Malek is a Senior Vice President.

         MFD

         A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and
Jeffrey L. Shames are Directors, William W. Scott, Jr., an Executive Vice
President of MFS, is the President, Stephen E. Cavan is the Secretary, Robert
T. Burns is the Assistant Secretary, Joseph W. Dello Russo is the Treasurer,
and Thomas B. Hastings is the Assistant Treasurer.

         CIAI

         A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and
Jeffrey L. Shames are Directors, Cynthia Orcott is President, Bruce C. Avery
is the Vice President, Joseph W. Dello Russo is the Treasurer, Thomas B.
Hastings is the Assistant Treasurer, Stephen E. Cavan is the Secretary, and
Robert T. Burns is the Assistant Secretary.

         MFSC

         A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and
Jeffrey L. Shames are Directors, Joseph A. Recomendes, a Senior Vice President
of MFS, is Vice Chairman and a Director, Janet A. Clifford is the Executive
Vice President, Joseph W. Dello Russo is the Treasurer, Thomas B. Hastings is
the Assistant Treasurer, Stephen E. Cavan is the Secretary, and Robert T.
Burns is the Assistant Secretary.

         AMI

         A. Keith Brodkin is the Chairman and a Director, Jeffrey L. Shames,
and Arnold D. Scott are Directors, Thomas J. Cashman, Jr., is the President
and a Director, Leslie J. Nanberg is a Senior Vice President, a Managing
Director and a Director, George F. Bennett, Carol A. Corley, John A. Gee,
Brianne Grady and Kevin R. Parke  are Senior Vice Presidents and Managing
Directors, Joseph W. Dello Russo is the Treasurer, Thomas B. Hastings is the
Assistant Treasurer and Robert T. Burns is the Secretary.

         RSI

         William W. Scott, Jr. and Bruce C. Avery are Directors, Arnold D.
Scott is the Chairman and a Director, Joseph W. Dello Russo is the Treasurer,
Thomas B. Hastings is the Assistant Treasurer, Stephen E. Cavan is the
Secretary, Robert T. Burns is the Assistant Secretary and Sharon A. Brovelli
and Martin E. Beaulieu are Senior Vice Presidents.

         In addition, the following persons,  Directors or officers of MFS, have
the affiliations
    
<PAGE>
   
indicated:

         A. Keith Brodkin           Director, Sun Life Assurance Company of
                                    Canada (U.S.), One Sun Life Executive
                                    Park, Wellesley Hills, Massachusetts
                                    Director, Sun Life Insurance and Annuity
                                    Company of New York, 67 Broad Street,
                                    New York, New York

         John R. Gardner            President and a Director, Sun Life
                                    Assurance Company of Canada, Sun Life
                                    Centre, 150 King Street West, Toronto,
                                    Ontario, Canada (Mr. Gardner is also an
                                    officer and/or Director of various
                                    subsidiaries and affiliates of Sun Life)

         John D. McNeil             Chairman, Sun Life Assurance Company of
                                    Canada, Sun Life Centre, 150 King Street
                                    West, Toronto, Ontario, Canada (Mr.
                                    McNeil is also an officer and/or Director
                                    of various subsidiaries and affiliates of
                                    Sun Life)

         Joseph W. Dello Russo      Director of Mutual Fund Operations, The
                                    Boston Company, Exchange Place, Boston,
                                    Massachusetts (until August, 1994)
    
Item 29. Distributors

         (a) Reference is hereby made to Item 28 above.

         (b) Reference is hereby made to Item 28 above;  the principal  business
address of each of these persons is 500 Boylston Street,  Boston,  Massachusetts
02116.

         (c) Not applicable.

Item 30. Location of Accounts and Records

         The Registrant's  corporate documents are kept by the Registrant at its
offices.   Portfolio  brokerage  orders,  other  purchase  orders,  reasons  for
brokerage  allocation and lists of persons  authorized to transact  business for
the  Registrant  are kept by  Massachusetts  Financial  Services  Company at 500
Boylston Street,  Boston,  Massachusetts 02116.  Shareholder account records are
kept by MFS Service Center, Inc. at 500 Boylston Street,  Boston,  Massachusetts
02116.  Transaction  journals,  receipts  for the  acceptance  and  delivery  of
securities  and cash,  ledgers and trial  balances are kept by State Street Bank
and Trust Company at State Street  South,  5-West,  North Quincy,  Massachusetts
02171.
<PAGE>

Item 31. Management Services

         Not applicable.

Item 32. Undertakings

         (a) Not applicable.
   
         (b) The  Registrant  undertakes to file a  post-effective  amendment to
this registration  statement,  in order to file financial statements for the MFS
Institutional  Core Plus Fixed Income Fund and MFS Institutional  Research Fund,
which need not be certified,  within four to six months from the effective  date
of  Post-Effective  Amendment  No. 8 filed with the SEC on September 15, 1995 or
within four to six months of the  commencement of investment  operations of each
Fund.
    
         (c)  Registrant  undertakes to furnish each person to whom a prospectus
is  delivered  with a copy of its  latest  annual  report to  shareholders  upon
request and without charge.

         (d)  Insofar  as  indemnification   for  liability  arising  under  the
Securities  Act of 1933 may be permitted to trustees,  officers and  controlling
persons of the  Registrant  pursuant to the  provisions  set forth in Item 27 of
this Part C, or otherwise,  the  Registrant has been advised that in the opinion
of the Securities and Exchange Commission such indemnification is against public
policy as expressed in the Act and is,  therefore,  unenforceable.  In the event
that a claim  for  indemnification  against  such  liabilities  (other  than the
payment by the Registrant of expenses incurred or paid by a trustee,  officer or
controlling  person of the Registrant in the  successful  defense of any action,
suit or proceeding) is asserted by such director,  officer or controlling person
in connection with the Securities being Registered,  the Registrant will, unless
in the  opinion  of its  counsel  the matter  has been  settled  by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.
<PAGE>

                                   SIGNATURES



         Pursuant  to the  requirements  of the  Securities  Act of 1933 and the
Investment  Company Act of 1940, the  Registrant  certifies that it meets all of
the requirements for  effectiveness of this Registration  Statement  pursuant to
Rule  485(b)  under  the  Securities  Act of  1933  and  has  duly  caused  this
Post-Effective  Amendment  to the  Registration  Statement  to be  signed on its
behalf by the undersigned,  thereto duly  authorized,  in the City of Boston and
The Commonwealth of Massachusetts on the 26th day of June 1996.

                                    MFS INSTITUTIONAL TRUST


                                    By:     JAMES R. BORDEWICK, JR.
                                    Name:   James R. Bordewick, Jr.
                                    Title:  Assistant Secretary

         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Post-Effective  Amendment to its Registration Statement has been signed below by
the following persons in the capacities indicated on June 26, 1996.

         SIGNATURE                          TITLE


A. KEITH BRODKIN*          Chairman, President (Principal
A. Keith Brodkin           Executive Officer) and Trustee


W. THOMAS LONDON*          Treasurer (Principal Financial Officer
W. Thomas London           and Principal Accounting Officer)


WILLIAM R. GUTOW*          Trustee
William R. Gutow


NELSON J. DARLING, JR.*    Trustee
Nelson J. Darling, Jr.


                                    *By:    JAMES R. BORDEWICK, JR.
                                    Name:   James R. Bordewick, Jr.
                                            as Attorney-in-fact

                                    *Executed by James R. Bordewick, Jr. on
                                    behalf of those indicated pursuant to a
                                    Power of Attorney dated August 12, 1994,
                                    filed with Post-Effective Amendment
                                    No. 9 on October 27, 1995.
<PAGE>


                               INDEX TO EXHIBITS



EXHIBIT NO.                 DESCRIPTION OF EXHIBIT

17                Financial Data Schedules for MFS Institutional
                  International Equity Fund and MFS Institutional
                  Mid-Cap Growth Equity Fund.

<TABLE> <S> <C>

<PAGE>

<ARTICLE> 6
<SERIES>
   <NUMBER> 07
   <NAME> MFS INSTITUTIONAL INTERNATIONAL EQUITY FUND
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          JUN-30-1996
<PERIOD-START>                             FEB-01-1996
<PERIOD-END>                               APR-30-1996
<INVESTMENTS-AT-COST>                          2274329
<INVESTMENTS-AT-VALUE>                         2393817
<RECEIVABLES>                                    32024
<ASSETS-OTHER>                                   13236
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 2439077
<PAYABLE-FOR-SECURITIES>                          7722
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         8318
<TOTAL-LIABILITIES>                              16040
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       2288536
<SHARES-COMMON-STOCK>                           227905
<SHARES-COMMON-PRIOR>                                1
<ACCUMULATED-NII-CURRENT>                        12328
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                           2697
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        119476
<NET-ASSETS>                                   2423037
<DIVIDEND-INCOME>                                12231
<INTEREST-INCOME>                                 5115
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    5018
<NET-INVESTMENT-INCOME>                          12328
<REALIZED-GAINS-CURRENT>                          2697
<APPREC-INCREASE-CURRENT>                       119476
<NET-CHANGE-FROM-OPS>                           134501
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         227905
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                         2423037
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             3962
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  29643
<AVERAGE-NET-ASSETS>                           2126154
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                   0.07
<PER-SHARE-GAIN-APPREC>                           0.56
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              10.63
<EXPENSE-RATIO>                                   0.95
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                              0.00

</TABLE>

<TABLE> <S> <C>

<PAGE>

        
<ARTICLE> 6
<SERIES>
   <NUMBER> 06
   <NAME> MFS INSTITUTIONAL MID-CAP GROWTH EQUITY
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          JUN-30-1996
<PERIOD-START>                             DEC-28-1995
<PERIOD-END>                               APR-30-1996
<INVESTMENTS-AT-COST>                         12722267
<INVESTMENTS-AT-VALUE>                        13076185
<RECEIVABLES>                                    30043
<ASSETS-OTHER>                                   14430
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                13120658
<PAYABLE-FOR-SECURITIES>                       4732337
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         6813
<TOTAL-LIABILITIES>                            4739150
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       7963442
<SHARES-COMMON-STOCK>                           731884
<SHARES-COMMON-PRIOR>                           296334
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                          (2222)
<ACCUMULATED-NET-GAINS>                          66370
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        353918
<NET-ASSETS>                                   8381508
<DIVIDEND-INCOME>                                 1643
<INTEREST-INCOME>                                 4148
<OTHER-INCOME>                                       0
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