EATON VANCE SERIES TRUST
N-30D, 1998-06-30
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<PAGE>

 

[LOGO OF EATON VANCE   Investing                
APPEARS HERE]          for the                    [PICTURE OF STATUE OF
                       21st                       LIBERTY APPEARS HERE]
                       Century                                             
                                                                           
                                 
                                 





                        Semiannual Report April 30, 1998

[PICTURE OF WALL ST.               
SIGN APPEARS HERE]            DIVERSIFICATION FUND






                                   Eaton Vance
                      Global Management-Global Distribution



[PICTURE OF CALCULATOR &
TAX FORMS APPEARS HERE]
<PAGE>

 
Diversification Fund as of April 30, 1998

INVESTMENT UPDATE


[PICTURE OF DUNCAN W. RICHARDSON APPEARS HERE]
Duncan W. Richardson
Portfolio Manager 

Investment Environment
- --------------------------------------------------------------------------------

    The Economy

 .   The U.S. economy continued its extraordinary performance in the latter part
    of 1997 and early 1998. Gross Domestic Product - the primary indicator of
    overall U.S. economic growth - grew at real annual rates of 3.7% in the
    fourth quarter of 1997 and 4.2% in the first quarter of 1998. Meanwhile, the
    civilian unemployment rate reached a 28-year low of 4.3% in April, 1998.

 .   The inflation rate, which historically has risen during periods of sustained
    growth and low unemployment, has remained very low. The Consumer Price Index
    increased only 1.7% in 1997 and has advanced at a rate of 1.0% (annualized)
    thus far in 1998.

 .   The consensus among leading economists is that inflation has remained low
    due to global competition, a strong dollar - made even stronger by the Asian
    currency crisis - and higher productivity brought on by advances in
    technology.

 The Stock Market

 .   The U.S. stock market's strong performance during the period reflected the
    healthy economic climate and the continued demand for U.S. stocks. In 1997,
    the return of the S&P 500 Index exceeded 20% for a record third consecutive
    year, and year-to-date through April 30, 1998, the S&P 500 has achieved
    returns of 15.1%.*

 .   As stock valuations have increased, so has market volatility. In October,
    the market fell by over 10%, sparked largely by initial fears concerning the
    Asian economic and currency crisis. After recovering, the market experienced
    a similar Asian-inspired decline of over 5% in January, 1998.

 .   Since January, the market has advanced to new record highs, driven by
    buoyant economic conditions in the U.S. and diminishing concerns about the
    impact of the Asian crisis on the earnings of U.S. multinationals.

The Fund
- --------------------------------------------------------------------------------

    The Past Six Months

 .   During the six months ended April 30, 1998, the Fund had a total return of
    22.3%. This return resulted from an increase in net asset value to $409.10
    per share on April 30, 1998 from $335.79 on October 31, 1997 and the
    reinvestment of $1.25 per share in income dividends.

 .   By comparison, the average annual total return for mutual funds in the
    Lipper Growth Funds Category was 18.2% during this period.* 

    Fund Strategy and Outlook

 .   The Fund seeks to achieve long-term, after-tax returns by investing in the
    Tax-Managed Growth Portfolio.

 .   The Portfolio invests in a broadly diversified selection of stocks,
    emphasizing holdings of high-quality growth companies that are acquired with
    the expectation of being held for a period of years. The Portfolio utilizes
    a number of tax-efficient management techniques and seeks to achieve returns
    primarily in the form of unrealized gains, which are not subject to current
    tax.

 .   With stocks reaching ever-higher valuations, we have been careful in our
    selection of stocks to acquire. During the period, we have found
    opportunities in the oil services, financial, and technology sectors.

 .   We continue to anticipate lower returns in the stock market and a reversion
    toward the historic annual average of 10%. Earnings disappointments or
    interest rate hikes over the coming months could pull the market lower.
    Nevertheless, we plan to stay with the same type of high-quality companies
    that are currently in the Portfolio, as we believe they will continue to
    produce consistent returns over the long term.

- --------------------------------------------------------------------------------
/1/Returns are calculated by determining the percentage change in net asset
value with all distributions reinvested. /2/For Tax-Managed Growth Portfolio, as
of 4/30/98; may not be representative of the Portfolio's current or future
investments. The ten largest holdings accounted for 13.6% of the Portfolio's
investments. *It is not possible to invest directly in an Index or Lipper
Category. Past performance is no guarantee of future results. Investment return
and principal value will fluctuate so that shares, when redeemed, may be worth
more or less than their original cost.
- --------------------------------------------------------------------------------

Fund Information
as of April 30, 1998

Performance/1/
- -----------------------------------------

Average Annual Total Returns
- -----------------------------------------

One Year                           42.9%
Five Years                         21.6
Ten Years                          16.8
Life of Fund (7/27/61)             10.6

- --------------------------------------------------------------------------------
Mutual fund shares are not insured by the FDIC and are not deposits or other
obligations of, or guaranteed by, any depository institution. Shares are subject
to investment risks, including possible loss of principal invested.
- --------------------------------------------------------------------------------

Five Largest Sectors/2/
- -----------------------------------------

By total net assets

      [BAR CHART APPEARS HERE]

Financial                          10.0%
Insurance                           8.4%
Drugs                               8.3%
Computer Hardware & Software        7.9%
Medical Products                    6.4%


Ten Largest Holdings/2/
- -------------------------------------------

By total net assets

Pfizer, Inc.                           1.7%
Johnson & Johnson Co.                  1.4
General Re Corp.                       1.4
Automatic Data Processing, Inc.        1.4
SunAmerica, Inc.                       1.3
Home Depot, Inc. (The)                 1.3
Albertson's, Inc.                      1.3
Federal National Mortgage Assoc.       1.3
Marsh & McLennan Cos., Inc.            1.3
Schlumberger Ltd.                      1.2


                                       2
<PAGE>

Diversification Fund as of April 30, 1998

FINANCIAL STATEMENTS (Unaudited)

Statement of Assets and Liabilities  


As of April 30, 1998
Assets
- --------------------------------------------------------------------------------
Investment in Tax-Managed Growth Portfolio (Portfolio), at value 
   (Note 1A) (identified cost, $16,945,380)                        $131,369,095
- --------------------------------------------------------------------------------
Total assets                                                       $131,369,095
- --------------------------------------------------------------------------------

Liabilities                                                       
- --------------------------------------------------------------------------------
Payable to affiliate for Trustees' fees (Note 5)                   $        316
Accrued expenses                                                          4,349
- --------------------------------------------------------------------------------
Total liabilities                                                  $      4,665
- --------------------------------------------------------------------------------
Net Assets for 321,104 shares of                                   
   beneficial interest outstanding                                 $131,364,430
- --------------------------------------------------------------------------------

Sources of Net Assets                                             
- --------------------------------------------------------------------------------
Accumulated undistributed net realized gain on investment 
   transactions from Portfolio (computed on the basis of
   identified cost), less the excess of cost of Fund shares        
   redeemed over proceeds from sales of Fund shares 
   (including shares issued to shareholders electing to 
   receive payment of distributions in Fund shares)                $ 25,714,662

Accumulated undistributed net investment income                         307,836

Federal tax on undistributed net realized long-term capital 
   gain, paid on behalf of shareholders (Note 1C)                    (9,081,783)

Net unrealized appreciation of investments from Portfolio
   (computed on the basis of identified cost)                       114,423,715
- --------------------------------------------------------------------------------
Total                                                             $ 131,364,430
- --------------------------------------------------------------------------------

Net Asset Value and Redemption                                    
Price Per Share                                                   
- --------------------------------------------------------------------------------
($131,364,430 / 321,104 shares of                                 
   beneficial interest outstanding)                               $      409.10
- --------------------------------------------------------------------------------

Statement of Operations                                           
                                                                  
For the Six Months Ended                                          
April 30, 1998                                                    
Investment Income (Note 1B)                                       
- --------------------------------------------------------------------------------
Dividend income allocated from Portfolio (net of foreign 
   taxes, $8,597)                                                 $     724,838
Interest income allocated from Portfolio                                123,901
Expenses allocated from Portfolio                                      (318,273)
- --------------------------------------------------------------------------------
Net investment income from Portfolio                              $     530,466
- --------------------------------------------------------------------------------
                                                                  
Expenses                                                          
- --------------------------------------------------------------------------------
Compensation of Trustees not members of the Administrator's 
   organization (Note 5)                                          $       1,804
Legal and accounting services                                            11,461
Transfer and dividend disbursing agent fees                              10,160
Printing and postage                                                      7,854
Custodian fee                                                             4,490
- --------------------------------------------------------------------------------
Total expenses                                                    $      35,769
- --------------------------------------------------------------------------------

Net investment income                                             $     494,697
- --------------------------------------------------------------------------------

Realized and Unrealized                                           
Gain (Loss) from Portfolio                                        
- --------------------------------------------------------------------------------
Net realized gain (loss) --                                       
   Investment transactions (identified cost basis)                $     153,976
- --------------------------------------------------------------------------------
Net realized gain on investments                                  $     153,976
- --------------------------------------------------------------------------------
Change in unrealized appreciation (depreciation) --               
   Investments                                                    $  23,525,759
   Foreign currency                                                        (508)
- --------------------------------------------------------------------------------
Net change in unrealized appreciation                             
   (depreciation) of investments                                  $  23,525,251
- --------------------------------------------------------------------------------
Net realized and unrealized gain on investments                   $  23,679,227
- --------------------------------------------------------------------------------
Net increase in net assets from operations                        $  24,173,924
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                       3
<PAGE>

Diversification Fund as of April 30, 1998

FINANCIAL STATEMENTS CONT'D

Statements of Changes in Net Assets


                                              
                                            Six Months Ended            
Increase (Decrease)                         April 30, 1998      Year Ended      
in Net Assets                               (Unaudited)         October 31, 1997
- --------------------------------------------------------------------------------
From operations -- 
   Net investment income                    $     494,697       $       783,753
   Net realized gain on
      investment transactions                     153,976             2,758,428
   Net change in unrealized                                                    
      appreciation (depreciation)                                              
      of investments                           23,525,251            23,773,373
- --------------------------------------------------------------------------------
Net increase in net
   assets from operations                   $  24,173,924         $  27,315,554
- --------------------------------------------------------------------------------
Distributions to
   shareholders (Note 2) --
   From net investment income               $    (405,107)        $    (697,226)
- --------------------------------------------------------------------------------
Total distributions to shareholders         $    (405,107)        $    (697,226)
- --------------------------------------------------------------------------------
Transactions in shares of beneficial
   interest (Note 3) --
   Net asset value of shares issued to
      shareholders in payment of
      distributions declared                $      84,457         $     142,926
   Cost of shares redeemed                     (3,745,888)           (2,593,458)
- --------------------------------------------------------------------------------
Net decrease in net assets from Fund        
   share transactions                       $  (3,661,431)        $  (2,450,532)
- --------------------------------------------------------------------------------
Net increase in net assets                  $  20,107,386         $  24,167,796
- --------------------------------------------------------------------------------

Net Assets
- --------------------------------------------------------------------------------
At beginning of period                      $ 111,257,044         $  87,089,248
- --------------------------------------------------------------------------------
At end of period                            $ 131,364,430         $ 111,257,044
- --------------------------------------------------------------------------------

Accumulated undistributed
net investment income
included in net assets
- --------------------------------------------------------------------------------
At end of period                            $     307,836         $     218,246
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                       4
<PAGE>

Diversification Fund  as of April 30, 1998

FINANCIAL STATEMENTS CONT'D

Financial Highlights

<TABLE>
<CAPTION>
                                                                                                                   
                                     Six Months Ended                                                  Year Ended May 31,
                                     April 30, 1998   Year Ended        Period Ended        ---------------------------------------
                                     (Unaudited)      October 31, 1997  October 31, 1996 *    1996      1995      1994      1993
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                  <C>              <C>               <C>                 <C>       <C>       <C>       <C> 
Net asset value -- Beginning of                                                                                                    
   period                                $335.790         $256.640          $240.770        $202.720  $170.980  $174.560  $159.820 
- -----------------------------------------------------------------------------------------------------------------------------------

Income (loss) from operations
- -----------------------------------------------------------------------------------------------------------------------------------
Net investment income                    $  1.550         $  2.351          $  0.863        $  2.465  $  2.350  $  2.011  $  1.935
Net realized and unrealized gain                                                                                                   
   (loss) on investments                   73.010           78.879            16.207          43.430    33.209    (2.899)   17.155 
- -----------------------------------------------------------------------------------------------------------------------------------
Total income (loss) from operations      $ 74.560         $ 81.230          $ 17.070        $ 45.895  $ 35.559  $ (0.888) $ 19.090
- -----------------------------------------------------------------------------------------------------------------------------------

Less distributions
- -----------------------------------------------------------------------------------------------------------------------------------
From net investment income               $  (1.250)       $  (2.080)        $ (1.200)       $ (2.380) $ (2.220) $  (1.950)$ (1.900)
From net realized gain on                      
   investments                                 --               --                --          (5.465)   (1.145)       --    (2.450) 
- -----------------------------------------------------------------------------------------------------------------------------------
Total distributions                      $  (1.250)        $  (2.080)       $ (1.200)       $ (7.845) $ (3.365) $  (1.950)$ (4.350)
- -----------------------------------------------------------------------------------------------------------------------------------
Less provision for federal tax on
   undistributed net realized            
    long-term gain (Note 1C)             $     --         $     --          $     --        $     --  $ (0.454) $  (0.742)$     -- 
- -----------------------------------------------------------------------------------------------------------------------------------

Net asset value-- End of period          $409.100         $335.790          $256.640        $240.770  $202.720  $ 170.980 $174.560
- -----------------------------------------------------------------------------------------------------------------------------------

Total Return /(1)/                          22.25%           31.76%             7.12%          23.10%    21.16%     (0.50)%  12.10%
- -----------------------------------------------------------------------------------------------------------------------------------

Ratios/Supplemental Data
- -----------------------------------------------------------------------------------------------------------------------------------
Net assets, end of period (000's         
   omitted)                              $131,364         $111,257           $87,089         $84,596   $73,097   $69,204  $ 79,243 
Ratio of expenses to average daily           
   net assets /(2)//(3)/                     0.60%+           0.67%             0.74%+          0.79%     0.79%     0.78%     0.78% 
Ratio of expenses to average daily
   net assets after custodian                0.60%+           0.67%             0.74%+          0.78%       --        --        --
   fee reduction /(3)/
Ratio of net investment income to            0.83%+           0.77%             0.84%+          1.11%     1.30%     1.17%     1.19%
   average daily net assets
Portfolio Turnover /(4)/                       --               --                --              13%        9%        8%        5%
Average commission rate (per share)/(5)/       --               --                --         $0.0600        --        --        --
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE> 

+     Annualized.

*     For the five month period ended October 31, 1996.

/(1)/ Total return is calculated assuming a purchase at the net asset value on
      the first day and a sale at the net asset value on the last day of each
      period reported. Dividends and distributions, if any, are assumed
      reinvested at the net asset value on the reinvestment date. Total return
      is not computed on an annualized basis.

/(2)/ Includes the Fund's share of its corresponding Portfolio's allocated
      expenses for the period the fund was investing in the Portfolio.

/(3)/ The expense ratios for the year ended May 31, 1996 and periods thereafter
      have been adjusted to reflect a change in reporting requirements. The new
      reporting guidelines require the Fund to increase its expense ratio by the
      effect of any expense offset arrangements with its service providers. The
      expense ratios for each of the prior periods have not been adjusted to
      reflect this change.

/(4)/ Portfolio Turnover represents the rate of portfolio activity for the
      period while the Fund was making investments directly in securities. The
      portfolio turnover rate for the period since the Fund transferred all of
      its investable assets to the Portfolio is shown in the Portfolio's
      financial statements which are included elsewhere in this report.

/(5)/ Average commission rate paid is computed by dividing the total dollar
      amount of commissions paid during the fiscal year by the total number of
      shares purchased and sold during the fiscal year for which commissions
      were charged. For fiscal years beginning on or after September 1, 1995, a
      fund is required to disclose its average commission rate per share for
      security trades on which commissions were charged. The average commission
      rate for the period since the Fund transferred all of its investable
      assets to the Portfolio is shown in the Portfolio's financial statements
      which are included elsewhere in this report.

                       See notes to financial statements

                                       5
<PAGE>
 
Diversification Fund as of April 30, 1998

NOTES TO FINANCIAL STATEMENTS (Unaudited)

1  Significant Accounting Policies
   -----------------------------------------------------------------------------
   Diversification Fund (the Fund), formerly the Diversification Fund, Inc., is
   a series of Eaton Vance Series Trust (the Trust). The Trust is an entity of
   the type commonly known as a Massachusetts business trust and is registered
   under the Investment Company Act of 1940, as amended, as a diversified open-
   end management investment company. The Fund invests all of its investable
   assets in interests in the Tax-Managed Growth Portfolio (the Portfolio), a
   New York Trust, having the same investment objective as the Fund. The value
   of the Fund's investment in the Portfolio reflects the Fund's proportionate
   interest in the net assets of the Portfolio (2.3% at April 30, 1998). The
   performance of the Fund is directly affected by the performance of the
   Portfolio. The financial statements of the Portfolio, including the portfolio
   of investments, are included elsewhere in this report and should be read in
   conjunction with the Fund's financial statements. The following is a summary
   of significant accounting policies consistently followed by the Fund in the
   preparation of its financial statements. The policies are in conformity with
   generally accepted accounting principles.

   A Investment Valuation -- Valuation of securities by the Portfolio is
   discussed in Note 1A of the Portfolio's Notes to Financial Statements, which
   are included elsewhere in this report.

   B Income -- The Fund's net investment income consists of the Fund's pro rata
   share of the net investment income of the Portfolio, less all actual and
   accrued expenses of the Fund determined in accordance with generally accepted
   accounting principles.

   C Federal Taxes -- The Fund's policy is to comply with the provisions of the
   Internal Revenue Code applicable to regulated investment companies and to
   distribute to shareholders each year all of its net investment income and net
   realized short-term capital gain. Accordingly, no provision for federal
   income or excise tax is necessary. At October 31, 1997, the Fund, for federal
   income tax purposes, had a capital loss carryover $822,563 which will reduce
   the taxable income arising from future net realized gain on investments, if
   any, to the extent permitted by the Internal Revenue Code, and thus will
   reduce the amount of distributions to shareholders which would otherwise be
   necessary to relieve the Fund of any liability for federal income or excise
   tax. Such capital loss carryover will expire on October 31, 2005 ($620,094)
   and October 31, 2004 ($202,469). The Fund generally designates as
   undistributed any taxable net realized long-term gain (but reserves the right
   to distribute such gain in any year) and pays the federal tax thereon on
   behalf of shareholders. Provision for such tax is recorded on the Fund's
   records on the last business day of the Fund's fiscal year because the
   Internal Revenue Code provides that such tax is allocated among shareholders
   of record on that date.

   D Other -- Investment transactions are accounted for on a trade-date basis.
   Dividends to shareholders are recorded on the ex-dividend date.

   E Use of Estimates -- The preparation of financial statements in conformity
   with generally accepted accounting principles requires management to make
   estimates and assumptions that affect the reported amounts of assets and
   liabilities at the date of the financial statements and the reported amounts
   of revenue and expense during the reporting period. Actual results could
   differ from those estimates.

   F Expense Reduction -- Investors Bank & Trust Company (IBT) serves as
   custodian to the Fund and the Portfolio. Pursuant to the respective custodian
   agreements, IBT receives a fee reduced by credits which are determined based
   on the average cash balances the Fund or the Portfolio maintains with IBT.
   All significant credit balances used to reduce the Fund's custodian fees are
   reported as a reduction of operating expenses on the Statement of Operations.

   G Interim Financial Information -- The interim financial statements relating
   to April 30, 1998 and the six months then ended have not been audited by
   independent certified public accountants, but in the opinion of the Fund's
   management reflect all adjustments, consisting only of normal recurring
   adjustments, necessary for the fair presentation of the financial statements.


                                       6
<PAGE>
 
Diversification Fund as of April 30, 1998

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D


2  Distributions to Shareholders
   -----------------------------------------------------------------------------
   The Fund's policy is to distribute all or substantially all of the net
   investment income allocated to the Fund by the Portfolio (less the Fund's
   direct expenses). Distributions are paid in the form of additional shares of
   the Fund or, at the election of the shareholder, in cash. Generally accepted
   accounting principles require that only distributions in excess of tax basis
   earnings and profits be 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 only are
   classified as distributions in excess of net investment income or accumulated
   net realized gains.

3  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:

                              Six Months Ended
                              April 30, 1998   Year Ended
                              (Unaudited)      October 31, 1997
                                         
    ----------------------------------------------------------------------------
    Issued to shareholders electing 
    to receive payment  
    of distributions
      in Fund shares                 231                   480
                   
    Redemptions                  (10,454)               (8,501)
    ----------------------------------------------------------------------------
    Net decrease                 (10,223)               (8,021)
    ----------------------------------------------------------------------------
                          
 
4  Investment Transactions
   -----------------------------------------------------------------------------
   Decreases in the Fund's investment in the Portfolio aggregated $4,106,999 for
   the six months ended April 30, 1998. In addition, investments were
   distributed in payment for Fund shares redeemed, resulting in realized
   capital gains for book purposes of $2,995,391.


5  Transactions with Affiliates
   -----------------------------------------------------------------------------
   Eaton Vance Management (EVM) serves as the administrator of the Fund, but
   receives no compensation. The Portfolio has engaged Boston Management and
   Research (BMR), a subsidiary of EVM, to render investment advisory services.
   See Note 2 of the Portfolio's Notes to Financial Statements which are
   included elsewhere in this report. Except as to trustees of the Fund who are
   not members of EVM's organization, officers and trustees receive remuneration
   for their services to the Fund out of such investment adviser fee.

   Certain of the officers and trustees of the Fund are officers and
   directors/trustees of the above organizations.




                                       7
<PAGE>

Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited)


Common Stocks--97.0% 


Security                                            Shares              Value
- --------------------------------------------------------------------------------
Advertising -- 2.5%
- --------------------------------------------------------------------------------
AC Nielson Corp.                                    45,668          $  1,278,704
Advo, Inc.                                         170,000             4,866,250
Cognizant Corp.                                    249,006            12,808,246
Harte-Hanks Communications, Inc.                   144,604             3,280,703
Interpublic Group of Companies,  Inc.+              20,000             1,277,117
Interpublic Group of Companies, Inc.               279,756            17,869,415
Interpublic Group of Companies, Inc.+               42,000             2,679,531
Interpublic Group of Companies, Inc.+               82,350             5,257,476
Omnicom Group, Inc.                              1,466,200            69,461,224
Snyder Communications, Inc.+                       442,500            18,768,638
Snyder Communications, Inc.+                        40,000             1,695,750
TMP Worldwide, Inc.                                 43,000             1,139,500
True North Communications, Inc.                     33,000             1,006,500
WPP Group PLC                                      488,000             3,096,458
- --------------------------------------------------------------------------------
                                                                    $144,485,512
- --------------------------------------------------------------------------------

Aerospace and Defense -- 0.6%
- --------------------------------------------------------------------------------
Boeing Company (The)                               221,682          $ 11,097,955
Raytheon Co. Class A                                   133                 7,340
Raytheon Co. Class B                               224,544            12,728,838
TRW, Inc.                                            2,000               105,625
United Technologies Corp.                           49,398             4,862,616
United Technologies Corp.+                          36,844             3,625,018
- --------------------------------------------------------------------------------
                                                                    $ 32,427,392
- --------------------------------------------------------------------------------

Apparel -- 0.0%                                                     
- --------------------------------------------------------------------------------
Samsonite Corp.                                      1,000          $     28,750
- --------------------------------------------------------------------------------
                                                                    $     28,750
- --------------------------------------------------------------------------------

Auto and Parts -- 0.8%
- --------------------------------------------------------------------------------
Aftermarket Technology Corp.+                       46,000          $    893,412
Borg-Warner Automotive, Inc.                       225,000            13,992,188
Chrysler Corp.                                      32,000             1,286,000
Ford Motor Co.                                       1,000                45,813
General Motors Corp.                                 5,396               363,556
Harley-Davidson, Inc.                                1,000                36,000
Magna International, Inc. Class A                  345,000            25,724,063
Meritor Automotive, Inc.                            61,133             1,577,996
Snap-On, Inc.+                                      44,444             1,878,656
- --------------------------------------------------------------------------------
                                                                    $ 45,797,684
- --------------------------------------------------------------------------------

Banks - Regional -- 4.5%
- --------------------------------------------------------------------------------
AmSouth Bancorporation                               18,328         $  1,143,209
Banc One Corp.                                      501,848           29,514,935
Bank of Granite Corp.                                18,000              679,500
Bank of New York Co., Inc. (The)                     78,172            4,617,034
BankBoston Corp.                                      1,080              116,573
BB&T Corp.                                           33,235            2,235,054
City National Corp.                                 100,000            3,718,750
Colonial Bancgroup, Inc. (The)                      153,137            5,493,790
Comerica, Inc.                                      100,000            6,693,750
Community First Bancshares, Inc.+                   148,000            7,451,772
Compass Bancshares, Inc.                             48,208            2,338,088
Crestar Financial Corp.                              28,348            1,695,565
Fifth Third Bancorp                                 112,500            6,187,500
First Citizens Bancshares, Inc.                      35,300            3,997,725
First Union Corp.                                   786,051           47,457,823
Fleet Financial Group, Inc.                          57,486            4,965,353
Golden West Financial Corp.                           7,000              737,188
Keycorp                                              68,800            2,730,500
Marshall and Ilsley Corp.                            20,000            1,170,000
National City Corp.                                  33,309            2,306,648
National Commerce Bancorporation+                    79,816            3,564,622
Nationsbank Corp.                                   309,101           23,414,401
Northern Trust Corp.                                141,898           10,358,554
Norwest Corp.                                     1,626,244           64,541,558
PNC Bank Corp.                                       44,900            2,713,644
Sovereign Bancorp, Inc.                             366,000            6,908,250
Summit Bancorp                                       21,642            1,084,805
SunTrust Banks, Inc.                                    480               39,090
U.S. Bancorp                                         20,000            2,540,000
Union Planters Corp.                                 14,875              914,813
Valley National Bancorp                             184,691            7,410,726
Wachovia Corp.                                        6,330              537,654
Westamerica Bancorporation                           82,596            2,725,668
- --------------------------------------------------------------------------------
                                                                    $262,004,542
- --------------------------------------------------------------------------------

Banks and Money Services -- 2.0%
- --------------------------------------------------------------------------------
Ahmanson (H.F.) & Co.                                 2,600         $    198,250
Bank of Montreal                                     19,000            1,037,875
Bank United Corp.                                     2,000              103,500
BankAmerica Corp.                                    41,624            3,538,040
Beneficial Corp.                                     14,100            1,838,288
Chase Manhattan Corp.                                32,632            4,521,572

                       See notes to financial statements

                                       8
<PAGE>

Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                                              Shares            Value
- --------------------------------------------------------------------------------

Banks and Money Services (continued)
- --------------------------------------------------------------------------------
Citicorp                                             430,117       $  64,732,608
First Chicago NBD Corp.                               43,006           3,994,182
Firstbank of Illinois Co.                             26,146           1,196,180
FirstPlus Financial Group, Inc.                      120,000           5,820,000
FirstPlus Financial Group, Inc.+                     209,395          10,020,587
Morgan (J.P.) & Co., Inc.                             55,800           7,323,750
Washington Mutual, Inc.                               92,759           6,498,927
Wells Fargo & Co.                                     11,542           4,253,227
- --------------------------------------------------------------------------------
                                                                   $ 115,076,986
- --------------------------------------------------------------------------------

Beverages -- 1.8%
- --------------------------------------------------------------------------------
Anheuser-Busch Cos., Inc.                            261,465       $  11,978,365
Coca-Cola Company (The)                              502,245          38,107,839
PepsiCo, Inc.                                      1,311,156          52,036,503
- --------------------------------------------------------------------------------
                                                                   $ 102,122,707
- --------------------------------------------------------------------------------

Broadcasting and Cable -- 1.0%
- --------------------------------------------------------------------------------
American Radio Systems Corp.                         149,451       $   9,910,469
Clear Channel Communications, Inc.                    43,700           4,118,725
Comcast Corp., Class A                                62,500           2,238,281
Cox Communications, Inc., Class A                     93,319           4,164,360
Liberty Media Group, Class A                          91,828           3,047,542
Tele-Communications, Inc.                            490,073          15,804,854
U.S. West, Inc. - Media Group                        258,524           9,759,281
Univision Communications, Inc.                       200,649           7,687,365
- --------------------------------------------------------------------------------
                                                                   $  56,730,877
- --------------------------------------------------------------------------------

Building Materials -- 0.9%
- --------------------------------------------------------------------------------
American Standard Companies, Inc.                    143,358       $   6,979,743
CRH PLC                                              255,000           3,638,289
Interface, Inc.                                      184,213           7,817,539
Masco Corp.                                          114,331           6,631,198
Sherwin-Williams Co. (The)                            44,670           1,591,369
Stanley Works (The)                                   12,160             622,440
Valspar Corp.                                        570,000          22,728,750
Walter Industries, Inc.                                1,000              20,625
- --------------------------------------------------------------------------------
                                                                   $  50,029,953
- --------------------------------------------------------------------------------

Business Services - Miscellaneous-- 0.8%
- --------------------------------------------------------------------------------
Accustaff, Inc.                                       100,000      $   3,587,500
Corporate Express, Inc.                                92,486            930,640
Corrections Corporation of America                     54,756          1,519,479
Fair, Issac and Co., Inc.                              88,828          3,530,913
Fair, Issac and Co., Inc.+                            150,000          5,947,594
Half (Robert) International, Inc.                       1,800             97,425
Manpower, Inc.                                        110,000          4,846,875
Metzler Group, Inc. (The)                              90,000          3,116,250
Romac International, Inc.+                             45,546          1,204,555
Staff Leasing, Inc.                                    78,125          2,285,156
Staff Leasing, Inc.+                                   78,125          2,276,016
Sylvan Learning Systems, Inc.*                        142,857          7,053,564
Sylvan Learning Systems, Inc.+                        196,789          9,704,311
- --------------------------------------------------------------------------------
                                                                   $  46,100,278
- --------------------------------------------------------------------------------

Chemicals -- 1.0%
- --------------------------------------------------------------------------------
Bayer AG ADR                                           40,000      $   1,778,764
Dow Chemical Co. (The)                                 25,248          2,441,166
DuPont (E.I.) de Nemours & Co.                        215,107         15,662,478
Eastman Chemical Co.                                      123              8,456
Mississippi Chemical Corp.                            272,180          4,933,263
Monsanto Co.                                          492,240         26,027,190
Olin Corp.                                              1,037             48,545
Solutia, Inc.                                         200,336          5,684,534
- --------------------------------------------------------------------------------
                                                                   $  56,584,396
- --------------------------------------------------------------------------------

Chemicals - Specialty -- 0.1%
- --------------------------------------------------------------------------------
Airgas, Inc.                                           61,000      $     945,500
Airgas, Inc.+                                         205,555          3,179,730
- --------------------------------------------------------------------------------
                                                                   $   4,125,230
- --------------------------------------------------------------------------------

Communications Equipment -- 1.5%
- --------------------------------------------------------------------------------
Dialogic Corp.                                         80,000      $   2,990,000
General Cable Corp.                                     2,000             90,625
L.M. Ericsson Telephone Co., ADR                      226,000         11,624,875
Lucent Technologies, Inc.                               2,830            215,434
Nokia Corp., Class A ADR                              683,000         45,675,624
Northern Telecom Ltd. ADR                             111,740          6,802,173
PairGain Technologies, Inc.                           140,581          2,591,962
PairGain Technologies, Inc.+                          210,000          3,869,939


                       See notes to financial statements

                                       9
<PAGE>

Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                                           Shares           Value
- --------------------------------------------------------------------------------

Communications Equipment (continued)
- --------------------------------------------------------------------------------
Salient 3 Communications, Inc., Class A             78,125          $    810,547
Tellabs, Inc.                                      146,623            10,391,905
- --------------------------------------------------------------------------------
                                                                    $ 85,063,084
- --------------------------------------------------------------------------------

Communications Services -- 1.7%
- --------------------------------------------------------------------------------
360 Communications Co.                               1,333          $     40,740
Airtouch Communications, Inc.                        1,865                99,078
Aliant Communications, Inc.                         36,322             1,030,637
Alltel Corp.                                        53,760             2,298,240
Ameritech Corp.                                     28,362             1,207,158
AT&T Corp.                                          34,467             2,070,174
BellSouth Corp.                                      6,980               448,029
Citizens Utilities Corp., Class B                   44,309               448,632
Excel Communications, Inc.                         100,000             2,350,000
McLeodUSA, Inc.                                     57,143             2,628,578
McLeodUSA, Inc.+                                    36,000             1,652,688
Nextel Communications, Inc., Class A /(1)/          75,830             2,175,373
Premier Technologies, Inc.                          89,479             2,852,143
SBC Communications, Inc.                             9,342               387,109
Sprint Corp.                                         1,600               109,300
Tel-Save Holdings, Inc.                            247,376             5,643,265
Telecom Corp. of New Zealand Ltd. ADR                8,000               306,500
Telephone & Data Systems, Inc.                      86,756             4,120,910
Worldcom, Inc.                                   1,575,000            67,380,389
- --------------------------------------------------------------------------------
                                                                    $ 97,248,943
- --------------------------------------------------------------------------------

Computer Software -- 3.9%
- --------------------------------------------------------------------------------
Baan Co., NV ADR                                   223,926          $  9,936,716
BMC Software, Inc.*                                  4,000               374,250
Cadence Design Systems, Inc.                       506,000            18,374,125
Computer Associates International, Inc.            624,684            36,583,057
Compuware Corp.                                      1,400                68,425
CSG Systems International, Inc.                      7,958               362,089
HNC Software, Inc.*                                125,000             4,875,000
HNC Software, Inc.+                                147,980             5,756,792
HNC Software, Inc.+                                129,814             5,050,089
Intuit, Inc.                                       286,227            15,223,699
Lexmark International Group, Inc.                1,197,000            69,276,374
Microsoft Corp.                                    139,700            12,590,463
Oracle Corp.                                       502,500            13,002,188
Parametric Technology Corp.                         94,600             3,024,239
PeopleSoft, Inc.                                   134,692             6,263,178
PeopleSoft, Inc.+                                  120,000             5,577,210
Saville Systems PLC ADR                            160,000             7,980,000
Saville Systems PLC ADR                            160,000             7,970,025
Security Dynamics Technologies, Inc.*               40,000               965,000
Sterling Commerce, Inc.                              2,388               101,639
Wind River Systems, Inc.+                           13,000               449,225
- --------------------------------------------------------------------------------
                                                                    $223,803,783
- --------------------------------------------------------------------------------

Computers and Business Equipment -- 4.0%
- --------------------------------------------------------------------------------
Cabletron Systems, Inc.                             33,715          $    446,724
Cisco Systems, Inc.                                427,930            31,345,873
Cisco Systems, Inc.+                               116,062             8,497,291
Compaq Computer Corp.                               10,224               286,911
Dell Computer Corp.                                  1,900               153,425
Dell Computer Corp.+                               750,000            60,441,374
Digital Equipment Corp.                             29,355             1,632,872
EMC Corp.                                            3,000               138,375
Hewlett-Packard Co.                                505,085            38,039,214
International Business Machines Corp.              168,510            19,526,096
Sun Microsystems, Inc.                               3,500               144,156
Xerox Corp.                                        624,000            70,823,999
- --------------------------------------------------------------------------------
                                                                    $231,476,310
- --------------------------------------------------------------------------------

Conglomerates -- 0.9%                                           
- --------------------------------------------------------------------------------
General Electric Co.                               642,104          $ 54,659,102
- --------------------------------------------------------------------------------
                                                                    $ 54,659,102
- --------------------------------------------------------------------------------

Consumer Services -- 0.4%                                       
- --------------------------------------------------------------------------------
Block (H&R), Inc.                                  366,177          $ 16,477,965
Cendant Corp.                                      187,999             4,699,975
Service Corp. International                          3,000               123,750
ServiceMaster Co.                                   45,562             1,301,365
Stewart Enterprises, Inc.                          114,000             2,949,750
- --------------------------------------------------------------------------------
                                                                    $ 25,552,805
- --------------------------------------------------------------------------------

Containers and Packaging -- 0.6%                                
- --------------------------------------------------------------------------------
Sealed Air Corp.                                   535,000          $ 33,537,813
- --------------------------------------------------------------------------------
                                                                    $ 33,537,813
- --------------------------------------------------------------------------------


                       See notes to financial statements

                                      10
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                             Shares                Value
- --------------------------------------------------------------------------------

Distribution -- 1.3%
- --------------------------------------------------------------------------------
Cardinal Health, Inc.                  211,200             $  20,328,000
Supervalu, Inc.                         51,506                 2,250,168
Sysco Corp.                          1,492,272                35,534,727
U.S. Foodservice, Inc.                 452,443                15,976,893
U.S. Foodservice, Inc.+                 66,438                 2,340,227
Wilmar Industries, Inc.                 50,000                 1,193,750
- --------------------------------------------------------------------------------
                                                           $  77,623,765
- --------------------------------------------------------------------------------

Drugs -- 8.3%
- --------------------------------------------------------------------------------
American Home Products Corp.             2,300             $     214,188
Amgen, Inc.                            405,532                24,179,846
Astra AB Class A                     1,074,400                22,074,300
Astra AB Class B ADR                   160,000                 3,240,000
Bristol-Myers Squibb Co.               354,171                37,497,855
Covance, Inc.                           81,250                 1,741,797
Elan Corp., PLC ADR*                   401,676                24,954,122
Genentech, Inc.                         80,000                 5,540,000
Genzyme Corp.*                          12,150                    92,644
Genzyme Corp., Class A                 940,000                29,081,250
Lilly (Eli) & Co.                      589,158                40,983,303
Merck & Co., Inc.                      562,848                67,823,183
Pfizer, Inc.                           845,058                96,178,163
Quintiles Transnational Corp.           95,420                 4,723,290
Quintiles Transnational Corp.+         100,000                 4,947,525
Schering-Plough Corp.                  276,240                22,133,730
Sepracor, Inc.*                         96,000                 4,440,000
SmithKline Beecham PLC ADR             105,440                 6,280,270
Teva Pharmaceutical Industries         
 Ltd. ADR+                             100,000                 4,256,831
Vertex Pharmaceuticals, Inc.*          215,000                 6,691,875
Warner-Lambert Co.                     215,344                40,740,393
Watson Pharmaceuticals, Inc.           573,550                24,662,650
Watson Pharmaceuticals, Inc.+          122,888                 5,270,974
- --------------------------------------------------------------------------------
                                                           $ 477,748,189
- --------------------------------------------------------------------------------

Electric Utilities -- 0.2%
- --------------------------------------------------------------------------------
Central and South West Corp.             1,600             $      41,700
Dominion Resources, Inc.                 3,249                   128,539
Duke Energy Corp.                        1,800                   104,175
New England Electric System              2,700                   117,450
Texas Utilities Co.                    250,196                10,007,840
- --------------------------------------------------------------------------------
                                                           $  10,399,704
- --------------------------------------------------------------------------------

Electrical Equipment -- 0.7%
- --------------------------------------------------------------------------------
American Power Conversion Corp.        200,000             $   6,434,281
AMP, Inc.                              112,340                 4,416,366
Emerson Electric Co.                   151,648                 9,648,604
General Signal Corp.                    68,600                 3,018,400
Molex, Inc. Class A                     90,066                 2,420,524
Rockwell International Corp.            93,700                 5,241,344
Rockwell International Corp.+           90,000                 5,031,858
Thomas & Betts Corp.+                   22,963                 1,339,795
- --------------------------------------------------------------------------------
                                                           $  37,551,172
- --------------------------------------------------------------------------------

Electronics - Instruments -- 0.7%
- --------------------------------------------------------------------------------
Analog Devices, Inc.                   280,000             $  10,902,500
Dionex Corp.                           181,070                 9,664,611
Thermo Electron Corp.                  390,000                15,526,875
Waters Corp.+                           29,580                 1,581,739
X-Rite, Inc.                           170,000                 2,199,375
X-Rite, Inc.+                          118,000                 1,523,572
X-Rite, Inc.+                          140,000                 1,810,344
- --------------------------------------------------------------------------------
                                                           $  43,209,016
- --------------------------------------------------------------------------------

Electronics - Semiconductors -- 2.1%
- --------------------------------------------------------------------------------
Altera Corp.*                            3,600             $     145,800
Burr-Brown Corp.+                      600,000                18,253,369
Intel Corp.                            595,670                48,137,581
Intel Corp.+                            70,002                 5,654,208
KLA-Tencor Corp.                        36,000                 1,451,250
Linear Technologies Corp.               45,000                 3,622,500
Maxim Integrated Products Co.+          40,000                 1,614,193
Motorola, Inc.                         110,768                 6,161,470
National Semiconductor Corp.+           79,368                 1,745,223
Smart Modular Technologies, Inc.+       60,000                 1,479,398
Speedfam International, Inc.+          221,000                 6,405,796
Texas Instruments, Inc.                313,780                20,101,531
Ultratech Stepper, Inc.+               245,129                 6,013,455
Uniphase Corp.+                         25,932                 1,403,997
- --------------------------------------------------------------------------------
                                                           $ 122,189,771
- --------------------------------------------------------------------------------

Engineering and Construction -- 0.1%
- --------------------------------------------------------------------------------
Jacobs Engineering Group, Inc.         130,225             $   4,346,259
Jacobs Engineering Group, Inc.+         32,230                 1,075,138
- --------------------------------------------------------------------------------
                                                           $   5,421,397
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                       11
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                             Shares                Value                
- --------------------------------------------------------------------------------

Entertainment -- 0.3%
- --------------------------------------------------------------------------------
Callaway Golf Co.+                     235,715             $   6,407,818
Disney (Walt) Co.                       26,900                 3,344,006
Mattel, Inc.                            20,995                   804,371
Regal Cinemas, Inc.                      2,250                    68,766
Time Warner Inc.                       104,628                 8,213,298
- --------------------------------------------------------------------------------
                                                           $  18,838,259
- --------------------------------------------------------------------------------

Environmental Services -- 0.7%
- --------------------------------------------------------------------------------
Browning-Ferris Industries, Inc.       391,647             $  13,364,954
U.S.A. Waste Services, Inc.            303,556                14,893,216
Waste Management, Inc.                 304,212                10,191,102
- --------------------------------------------------------------------------------
                                                           $  38,449,272
- --------------------------------------------------------------------------------

Financial - Miscellaneous -- 3.5%
- --------------------------------------------------------------------------------
American Express Co.                   273,148             $  27,861,096
American General Corp.                  91,153                 6,073,069
Capital One Financial Corp.             36,000                 3,458,250
Federal Home Loan Mortgage Corp.       502,500                23,272,031
Federal National Mortgage            
 Association                         1,242,855                74,415,942
Household International, Inc.           36,018                 4,734,116
MGIC Investment Corp.                  680,000                42,840,000
Providian Financial Corp.              166,107                 9,997,565
Travelers Group, Inc.                  154,161                 9,432,726
- --------------------------------------------------------------------------------
                                                           $ 202,084,795
- --------------------------------------------------------------------------------

Foods -- 3.7%
- --------------------------------------------------------------------------------
Archer-Daniels-Midland Co.             136,929             $   2,943,974
Bestfoods                               22,400                 1,229,200
Corn Products International, Inc.          500                    17,813
Earthgrains Co. (The)                        1                        47
Flowers Industries, Inc.               393,000                 8,400,375
General Mills, Inc.                     17,500                 1,182,344
Kellogg Co.                             44,714                 1,844,453
McCormick & Co., Inc.                  554,298                18,984,707
Pioneer Hi-Bred International, Inc.    852,171                32,169,455
Quaker Oats Co. (The)                   39,942                 2,076,984
Riviana Foods, Inc.+                   150,000                 3,476,386
Sara Lee Corp.                         577,972                34,425,457
Tyson Food, Inc.                     1,779,999                34,376,231
Unilever ADR                           812,000                60,595,499
Wrigley (Wm.) Jr. Co.                  113,180                10,073,020
- --------------------------------------------------------------------------------
                                                           $ 211,795,945
- --------------------------------------------------------------------------------

Furniture and Appliances -- 0.9%
- --------------------------------------------------------------------------------
HON Industries, Inc.                 1,000,558             $  32,017,856
HON Industries, Inc.+                  134,930                 4,315,601
HON Industries, Inc.+                  134,930                 4,309,124
Leggett & Platt, Inc.                  119,744                 6,219,204
Leggett & Platt, Inc.+                  29,420                 1,527,237
Miller (Herman), Inc.                  120,000                 3,622,500
- --------------------------------------------------------------------------------
                                                           $  52,011,522
- --------------------------------------------------------------------------------

Health Services -- 1.0%
- --------------------------------------------------------------------------------
Aetna, Inc.                              4,821             $     389,597
Aetna, Inc.+                            55,000                 4,442,465
Beverly Enterprises, Inc.              357,143                 5,625,002
FPA Medical Management, Inc.           315,000                 3,937,500
Genesis Health Ventures, Inc.            4,000                   105,750
Health Management Associates,           
 Inc., Class A                          40,780                 1,284,570
HealthSouth Corp.                      146,000                 4,407,375
Integrated Health Services, Inc.        50,000                 1,928,125
Magellan Health Services, Inc.          50,000                 1,387,500
MedPartners, Inc.                       17,696                   181,384
Omnicare, Inc.                          25,650                   878,513
Orthodontic Centers of America, 
 Inc.+                                 100,000                 2,122,003
Pacificare Health Systems, Inc.,        19,500                 1,396,688
Class B
Parexel International Corp.+            35,000                 1,169,569
Quest Diagnostics, Inc.                 15,625                   300,781
Quorum Health Group, Inc.                6,893                   221,422
Quorum Health Group, Inc.+              48,840                 1,568,201
Renal Care Group, Inc.                 116,855                 4,469,704
Renal Care Group, Inc.+                130,817                 4,983,735
Response Oncology, Inc.                 44,761                   374,873
Sunrise Assisted Living, Inc.+         140,000                 6,256,811
Sunrise Assisted Living, Inc.+         210,000                 9,405,920
United HealthCare Corp.                 20,000                 1,405,000
Vencor, Inc.                            25,600                   694,400
- --------------------------------------------------------------------------------
                                                           $  58,936,888
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                       12
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                                      Shares              Value
- --------------------------------------------------------------------------------

Household Products -- 1.9%
- --------------------------------------------------------------------------------
Blyth Industries, Inc.                        222,000             $   8,144,625
Blyth Industries, Inc.+                       300,000                10,992,492
Blyth Industries, Inc.+                        40,000                 1,464,565
Blyth Industries, Inc.+                        20,000                   730,815
Colgate-Palmolive Co.                          43,652                 3,915,039
Fortune Brands, Inc.                            1,500                    55,313
Gillette Co.                                  127,100                14,672,106
Kimberly-Clark Corp.                          511,394                25,953,246
Procter & Gamble Co.                          360,700                29,645,031
Rubbermaid, Inc.                              463,920                13,279,710
- --------------------------------------------------------------------------------
                                                                  $ 108,852,942
- --------------------------------------------------------------------------------

Industrial Equipment -- 1.0%
- --------------------------------------------------------------------------------
Dover Corp.                                   324,360             $  12,812,220
Dover Corp.+                                   46,000                 1,816,092
Federal Signal Corp.                          283,471                 6,076,910
Illinois Tool Works, Inc.                     169,010                11,915,205
Parker-Hannifin Corp.                         150,898                 6,733,823
Regal Beloit Corp.                            265,000                 8,148,750
Tecumseh Products Co., Class A                193,055                 9,725,146
- --------------------------------------------------------------------------------
                                                                  $  57,228,146
- --------------------------------------------------------------------------------

Information Services -- 3.4%
- --------------------------------------------------------------------------------
Automatic Data Processing, Inc.             1,184,740             $  79,303,533
Bell and Howell Co.                           115,000                 3,176,875
BISYS Group, Inc. (The)*                       53,873                 2,127,984
Ceridian Corp.                                 90,500                 5,118,906
Computer Sciences Corp.                       282,000                14,875,500
Computer Sciences Corp.+                      160,000                 8,435,780
Dun & Bradstreet Corp. (The)                   86,158                 3,058,609
Electronic Data Systems Corp.                 155,000                 6,665,000
First Data Corp.                              128,618                 4,356,935
HBO and Co.                                    12,219                   730,849
IDX Systems Corp.+                             35,000                 1,520,876
Lason, Inc.+                                  165,000                 6,422,130
Lason, Inc.+                                  190,000                 7,380,360
Paychex, Inc.                                  58,651                 3,185,482
Reuters Holdings PLC ADR                      334,611                21,686,975
Sapient Corp.                                 236,480                11,661,605
Sapient Corp.+                                 87,396                 4,309,784
Saville Systems PLC ADR+                       99,197                 4,927,661
Siebel Systems, Inc.                          118,000                 3,053,250
SunGard Data Systems, Inc.                     80,000                 2,850,000
USCS International, Inc.+                     150,000                 3,011,203
- --------------------------------------------------------------------------------
                                                                  $ 197,859,297
- --------------------------------------------------------------------------------

Insurance -- 8.4%
- --------------------------------------------------------------------------------
Aegon, N.V. ADR                                42,726             $   5,677,217
Allmerica Financial Corp.                       1,500                    93,938
Allstate Corp. (The)                          598,208                57,577,519
American International Group, Inc.            506,784                66,673,769
AON Corp.                                      44,054                 2,841,483
Berkshire Hathaway, Inc. Class A+                 500                 3,430,000
Berkshire Hathaway, Inc. Class B                   21                    48,195
Chubb Corp.                                   101,050                 7,976,634
Conseco, Inc.+                                100,000                 4,942,650
General RE Corp.                              362,481                81,037,158
Jefferson-Pilot Corp.                          38,268                 2,245,824
Kansas City Life Insurance Co.                 35,400                 3,009,000
Lab Holdings, Inc.                             35,960                   836,070
Marsh & McLennan Cos., Inc.                   804,444                73,304,959
Mercury General Corp.                           2,000                   129,500
Mutual Risk Management Ltd.                   863,500                29,251,063
Progressive Corp.                             285,085                38,611,200
Protective Life Corp.                          64,346                 2,388,845
Provident Companies, Inc.                       3,728                   145,625
Safeco Corp.                                   12,122                   605,342
St. Paul Cos., Inc. (The)                     134,513                11,399,969
SunAmerica, Inc.                            1,542,524                77,029,791
Torchmark Corp.                               222,850                 9,930,753
UICI                                           57,257                 1,660,453
UICI+                                         180,000                 5,211,283
UNUM Corp.                                     50,000                 2,687,500
- --------------------------------------------------------------------------------
                                                                  $ 488,745,740
- --------------------------------------------------------------------------------

Investment Services -- 0.6%
- --------------------------------------------------------------------------------
E*Trade Group, Inc.+                          100,000             $   2,353,477
Merrill Lynch & Co., Inc.                     259,116                22,737,429
Morgan Stanley Dean Witter Discover & Co.      55,533                 4,380,165
Price (T. Rowe) Associates, Inc.               43,358                 3,273,529
Schwab (Charles) and Co., Inc.                 44,500                 1,557,500
- --------------------------------------------------------------------------------
                                                                  $  34,302,100
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                       13
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                             Shares                Value               
- --------------------------------------------------------------------------------

Lodging and Gaming -- 0.0%
- --------------------------------------------------------------------------------
Signature Resorts, Inc.+                50,000             $     887,985
- --------------------------------------------------------------------------------
                                                           $     887,985
- --------------------------------------------------------------------------------

Machinery -- 0.0%
- --------------------------------------------------------------------------------
DT Industries, Inc.                     37,728             $   1,263,888
- --------------------------------------------------------------------------------
                                                           $   1,263,888
- --------------------------------------------------------------------------------

Manufacturing -- 0.0%
- --------------------------------------------------------------------------------
Tyco International Ltd.                 20,000             $   1,090,000
- --------------------------------------------------------------------------------
                                                           $   1,090,000
- --------------------------------------------------------------------------------

Medical Products -- 6.4%
- --------------------------------------------------------------------------------
Abbott Laboratories                    219,233             $  16,031,413
Allegiance Corp.                        22,661                 1,033,908
Ballard Medical Products+              251,058                 6,304,678
Bausch & Lomb, Inc.                    145,574                 7,196,815
Baxter International, Inc.             806,028                44,684,177
Becton, Dickinson and Co.                3,510                   244,384
Becton, Dickinson and Co.+              14,490                 1,006,849
Boston Scientific Corp.                508,000                36,734,750
Dentsply International, Inc.            42,000                 1,380,750
ESC Medical Systems Ltd.                30,000                   975,000
Heartport, Inc.                         41,026                   435,901
Hillenbrand Industries, Inc.           647,898                40,412,638
Incyte Pharmaceuticals, Inc.+          577,571                25,946,511
Johnson & Johnson Co.                1,150,375                82,108,015
Marquette Medical Systems, Inc.         55,000                 1,485,000
Medtronics, Inc.                     1,052,726                55,399,705
Medtronics, Inc.+                       29,472                 1,550,189
Schein (Henry) Corp.                   200,000                 7,800,000
Schein (Henry) Corp.+                  225,700                 8,797,899
Schein (Henry) Corp.+                   17,000                   660,348
Schein (Henry) Corp.+                  130,000                 5,066,603
Sofamor Danek Group, Inc.*             223,000                19,568,250
St. Jude Medical,  Inc.                 42,144                 1,493,478
Steris Corp.                            37,297                 2,193,530
- --------------------------------------------------------------------------------
                                                           $ 368,510,791
- --------------------------------------------------------------------------------

Metals - Gold -- 0.0%
- --------------------------------------------------------------------------------
Freeport-McMoran Copper & Gold,          
 Inc.                                    6,000             $     112,875
- --------------------------------------------------------------------------------
                                                           $     112,875
- --------------------------------------------------------------------------------

Metals - Industrial -- 0.3%
- --------------------------------------------------------------------------------
Cyprus Amax Minerals Co.                20,950             $     361,388
Inco, Ltd.                             124,000                 2,177,750
Nucor Corp.                             40,000                 2,397,500
Nucor Corp.+                            22,648                 1,354,750
Potash Corp. of Saskatchewan           120,105                10,726,878
- --------------------------------------------------------------------------------
                                                           $  17,018,266
- --------------------------------------------------------------------------------

Natural Gas Utilities -- 0.2%
- --------------------------------------------------------------------------------
Columbia Energy Group                      747             $      60,694
KN Energy, Inc.                         20,000                 1,173,750
NGC Corp.                              290,000                 4,277,500
Sonat, Inc.                            107,200                 4,757,000
- --------------------------------------------------------------------------------
                                                           $  10,268,944
- --------------------------------------------------------------------------------

Oil and Gas - Equipment and Services -- 2.9%
- --------------------------------------------------------------------------------
Baker Hughes, Inc.                     639,234             $  25,888,977
Dresser Industries, Inc.                79,800                 4,219,425
EVI, Inc.                               33,000                 1,757,250
Halliburton Co.                        259,925                14,295,875
National-Oilwell, Inc.                  50,000                 1,896,875
National-Oilwell, Inc.+                416,400                15,733,986
Newpark Resources, Inc.                110,000                 2,646,346
Noble Drilling, Inc.                   170,000                 5,493,125
Patterson Energy, Inc.+                200,000                 2,779,700
Rowan Companies, Inc.                  250,000                 7,359,375
Royal Dutch Petroleum Co.               24,289                 1,373,847
Schlumberger Ltd.                      879,470                72,886,075
Tosco Corp.                                300                    10,688
Tosco Corp.+                           314,619                11,185,885
Weatherford Enterra, Inc.               25,000                 1,251,563
- --------------------------------------------------------------------------------
                                                           $ 168,778,992
- --------------------------------------------------------------------------------

Oil and Gas - Exploration
and Production -- 1.7%
- --------------------------------------------------------------------------------
Anadarko Petroleum Corp.               512,000             $  37,504,000
Apache Corp.                           945,440                33,444,940
British Petroleum Co. PLC ADR              500                    47,250
Burlington Resources, Inc.             119,335                 5,608,745
Oryx Energy Co.                        369,103                 9,642,816
Phillips Petroleum Co.                     979                    48,522
Triton Energy Ltd.*                    150,000                 6,018,750

                       See notes to financial statements

                                       14
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                             Shares                Value                
- --------------------------------------------------------------------------------

Oil and Gas - Exploration
and Production (continued)
- --------------------------------------------------------------------------------
Union Pacific Resources Group, Inc.     79,795             $   1,905,106
USX-Marathon Group                      50,895                 1,822,677
- --------------------------------------------------------------------------------
                                                           $  96,042,806
- --------------------------------------------------------------------------------

Oil and Gas - Integrated -- 0.9%
- --------------------------------------------------------------------------------
Amoco Corp.                            282,730             $  12,510,803
Atlantic Richfield Co.                  42,450                 3,311,100
Chevron Corp.                           55,600                 4,597,425
Exxon Corp.                            206,175                15,037,889
Mobil Corp.                            183,413                14,489,627
Murphy Oil Corp.                        29,700                 1,527,694
National Fuel Gas Co.                    2,000                    92,000
Quaker State Corp.                      90,758                 1,639,316
Texaco, Inc.                             1,914                   117,711
- --------------------------------------------------------------------------------
                                                           $  53,323,565
- --------------------------------------------------------------------------------

Paper and Forest Products -- 0.7%
- --------------------------------------------------------------------------------
Caraustar Industries, Inc.             184,961             $   6,334,914
Champion International Corp.            61,687                 3,319,532
Deltic Timber Corp.                      8,485                   242,353
Fort James Corp.                        56,401                 2,798,900
Georgia-Pacific Corp. - G-P Group      160,000                12,350,000
Georgia-Pacific Corp. - G-P Group+      14,133                 1,088,164
Georgia-Pacific Corp. - Timber         
 Group                                 160,000                 4,100,000
Mead Corporation (The)                  38,768                 1,342,342
Sonoco Products Co.                     71,429                 2,870,553
Union Camp Corp.                        80,309                 4,848,656
Weyerhauser Co.                         61,755                 3,558,632
- --------------------------------------------------------------------------------
                                                           $  42,854,046
- --------------------------------------------------------------------------------

Photography -- 0.1%
- --------------------------------------------------------------------------------
Eastman Kodak Co.                       49,744             $   3,590,895
- --------------------------------------------------------------------------------
                                                           $   3,590,895
- --------------------------------------------------------------------------------

Printing and Business Products -- 1.0%
- --------------------------------------------------------------------------------
American Business Products, Inc.       261,355             $   6,043,834
Avery Dennison Corp.                   537,816                28,168,113
Bowne & Co., Inc.                       86,320                 3,566,095
Danka Business Systems, PLC ADR          1,000                    20,000
Deluxe Corp.                            80,675                 2,702,613
Donnelley (R.R.) & Sons Co.             32,896                 1,449,480
Harland (John H.) Co.                   51,540                   918,056
Ikon Office Solutions, Inc.            115,500                 2,793,656
U.S. Office Products Co.               776,817                13,739,951
- --------------------------------------------------------------------------------
                                                           $  59,401,798
- --------------------------------------------------------------------------------

Publishing -- 2.4%
- --------------------------------------------------------------------------------
Belo (A.H.) Corp.                       55,110             $   2,917,386
Central Newspapers, Inc., Class A      210,000                15,382,500
Dow Jones & Co., Inc.                1,011,000                49,223,062
Gannett Co., Inc.                      260,900                17,724,894
Houghton Mifflin Co.                   112,400                 3,660,025
McGraw-Hill Companies, Inc. (The)      455,608                35,281,145
Meredith Corp.                         190,000                 8,170,000
Times Mirror Co. Class A               151,670                 9,280,308
- --------------------------------------------------------------------------------
                                                           $ 141,639,320
- --------------------------------------------------------------------------------

REITS -- 0.3%
- --------------------------------------------------------------------------------
Catellus Development Corp.             290,000             $   5,165,625
Equity Office Properties Trust           2,812                    79,966
Lasalle Partners, Inc.+                213,193                 7,313,852
Redwood Trust, Inc.                     71,710                 1,765,859
Rouse Co. (The)                        127,700                 3,942,738
SLH Corp.                               53,940                 1,618,200
- --------------------------------------------------------------------------------
                                                           $  19,886,240
- --------------------------------------------------------------------------------

Restaurants -- 1.0%
- --------------------------------------------------------------------------------
Bob Evans Farms, Inc.                   48,193             $     981,932
Boston Chicken, Inc.                    38,500                   164,826
Brinker International, Inc.            446,376                10,713,024
CKE Restaurants, Inc.                  100,000                 3,455,575
CKE Restaurants, Inc.+                  10,000                   344,865
McDonald's Corp.                       263,100                16,279,313
Outback Steakhouse, Inc.                77,101                 2,939,476
Outback Steakhouse, Inc.+              130,181                 4,961,165
Starbucks Corp.*                       300,000                14,437,500
Tricon Global Restaurants, Inc.        189,766                 6,025,071
- --------------------------------------------------------------------------------
                                                           $  60,302,747
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                       15
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                                     Shares                Value
- --------------------------------------------------------------------------------

Retail - Food and Drug -- 3.2%
- --------------------------------------------------------------------------------
Albertson's, Inc.                            1,521,744             $  76,087,199
CVS Corp.                                      690,000                50,887,499
Hannaford Brothers Co.                          30,849                 1,370,852
Kroger Co. (The)                                22,800                   954,750
Rite Aid Corp.                                   6,000                   192,750
Safeway, Inc.                                1,343,768                51,399,125
Walgreen Co.                                    13,750                   474,375
Whole Foods Market, Inc.                        90,000                 5,568,750
Winn-Dixie Stores, Inc.                         19,681                   740,498
- --------------------------------------------------------------------------------
                                                                   $ 187,675,798
- --------------------------------------------------------------------------------

Retail - General -- 2.3%
- --------------------------------------------------------------------------------
99 Cents Only Stores+                          342,670             $  13,034,246
Casey's General Stores, Inc.+                   75,000                 1,225,055
Dayton Hudson Corp.                                135                    11,787
Department 56, Inc.                            190,000                 6,828,125
Dollar General Corp.                            20,500                   776,438
Dollar Tree Stores, Inc.+                      165,195                 8,943,905
Dollar Tree Stores, Inc.+                      195,000                10,573,461
May Department Stores Co. (The)                104,008                 6,415,994
Penney (J.C.) Company, Inc.                    928,864                66,007,397
Pier 1 Imports, Inc.+                          100,000                 2,630,906
Wal-Mart Stores, Inc.                          344,390                17,413,219
- --------------------------------------------------------------------------------
                                                                   $ 133,860,533
- --------------------------------------------------------------------------------

Retail - Specialty and Apparel -- 2.7%
- --------------------------------------------------------------------------------
Burlington Coat Factory Warehouse Corp.        205,200             $   3,975,750
Burlington Coat Factory Warehouse Corp.+       338,400                 6,553,222
CompUSA, Inc.                                    1,000                    18,563
Harcourt General, Inc.                         216,416                11,294,210
Home Depot, Inc. (The)                       1,099,500                76,552,687
Limited, Inc. (The)                            205,000                 6,880,313
Lowe's Companies+                               30,000                 2,097,076
Office Depot, Inc.                              90,000                 2,981,250
OfficeMax, Inc.                                333,334                 6,270,846
Pep Boys - Manny, Moe & Jack (The)+             35,476                   771,217
Pep Boys - Manny, Moe & Jack (The)+             62,500                 1,356,656
Republic Industries, Inc.                    1,060,417                29,492,848
TJX Companies, Inc. (The)                          250                    11,063
Toys "R" Us, Inc.                              113,225                 3,120,764
Unifi, Inc.                                     50,000                 1,915,625
- --------------------------------------------------------------------------------
                                                                   $ 153,292,090
- --------------------------------------------------------------------------------

Specialty Chemicals and Materials -- 2.2%
- --------------------------------------------------------------------------------
Corning, Inc.                                  130,000             $   5,200,000
Dexter Corp. (The)                              47,829                 1,975,936
Ecolab, Inc.                                 1,844,036                58,432,890
Great Lakes Chemical Corp.                      33,290                 1,672,823
International Flavors & Fragrances, Inc.       148,101                 7,247,693
International Specialty Products, Inc.          59,000                 1,176,313
Lam Research Corp.                              83,000                 2,573,000
Millipore Corp.                              1,011,340                34,891,230
Minnesota Mining & Manufacturing Co.            37,685                 3,556,522
Nalco Chemical Co.                             221,952                 8,822,592
Pall Corp.                                     216,000                 4,239,000
- --------------------------------------------------------------------------------
                                                                   $ 129,787,999
- --------------------------------------------------------------------------------

Telephone Utilities -- 0.0%
- --------------------------------------------------------------------------------
Bell Atlantic Corp.                              4,083             $     382,016
GTE Corp.+                                      17,500                 1,020,100
U.S. West, Inc. - Communications Group           1,280                    67,520
- --------------------------------------------------------------------------------
                                                                   $   1,469,636
- --------------------------------------------------------------------------------

Tobacco -- 0.1%
- --------------------------------------------------------------------------------
Philip Morris Cos., Inc.                       182,560             $   6,811,770
Schweitzer-Mauduit International, Inc.           5,731                   190,556
- --------------------------------------------------------------------------------
                                                                   $   7,002,326
- --------------------------------------------------------------------------------

Transportation -- 0.7%
- --------------------------------------------------------------------------------
Arnold Industries, Inc.                        148,543             $   2,376,688
Burlington Northern Santa Fe Corp.              62,933                 6,230,367
Coach USA, Inc.                                 94,666                 4,490,718
Coach USA, Inc.+                                74,223                 3,519,193
Coach USA, Inc.+                               185,676                 8,794,793
FDX Corp.                                       93,723                 6,373,164
Heartland Express, Inc.+                       250,000                 6,215,641
Union Pacific Corp.                             90,300                 4,943,925
- --------------------------------------------------------------------------------
                                                                   $  42,944,489
- --------------------------------------------------------------------------------

                       See notes to financial statements

                                       16
<PAGE>
 
Tax-Managed Growth Portfolio  as of April 30, 1998

PORTFOLIO OF INVESTMENTS (Unaudited) CONT'D



Security                                      Shares              Value         
- --------------------------------------------------------------------------------
                                                                               
Trucks and Parts -- 0.1%                                                       
- --------------------------------------------------------------------------------
Paccar, Inc.                                   46,602             $    2,766,994
- --------------------------------------------------------------------------------
                                                                  $    2,766,994
- --------------------------------------------------------------------------------
                                                                               
Total Common Stocks                                                            
    (identified cost $3,813,073,110)                              $5,613,877,090
- --------------------------------------------------------------------------------

Convertible Preferred Stocks-- 0.6%

                                        
Security                                      Shares              Value         
- --------------------------------------------------------------------------------

Entertainment -- 0.6%
- --------------------------------------------------------------------------------
Time Warner Inc., Series J                    100,187             $  16,998,074
Time Warner Inc., Series J+/(1)/               66,791                11,508,464
Time Warner Inc., Series J+/(1)/               21,410                 3,627,043
Time Warner Inc., Series J+/(1)/               14,272                 2,455,455
- --------------------------------------------------------------------------------
                                                                  $  34,589,036
- --------------------------------------------------------------------------------

Financial - Miscellaneous -- 0.0%
- --------------------------------------------------------------------------------
American General Corp., Series D               21,474             $   1,224,018
- --------------------------------------------------------------------------------
                                                                  $   1,224,018
- --------------------------------------------------------------------------------

Insurance -- 0.0%
- --------------------------------------------------------------------------------
Aetna, Inc., Series C                             449             $      35,247
- --------------------------------------------------------------------------------
                                                                  $      35,247
- --------------------------------------------------------------------------------

Total Convertible Preferred Stocks
    (identified cost $23,414,320)                                 $  35,848,301
- --------------------------------------------------------------------------------

Commercial Paper-- 2.8%

                                          Face Amount                           
                                          (000's                                
Name of Company                           omitted)                Value
- --------------------------------------------------------------------------------
CIT Group Holdings, Inc., 5.52%, 5/6/98   $    87,551            $   87,483,878
Prudential Funding Corp., 5.55%, 5/1/98        76,449                76,449,000
- --------------------------------------------------------------------------------

Total Commercial Paper
    (identified cost $163,932,878)                               $  163,932,878
- --------------------------------------------------------------------------------

Total Investments -- 100.4%
    (identified cost $4,000,420,308)                             $5,813,658,269
- --------------------------------------------------------------------------------

Other Assets, Less Liabilities-- (0.4)%                          $  (21,685,428)
- --------------------------------------------------------------------------------

Net Assets -- 100.0%                                             $5,791,972,841
- --------------------------------------------------------------------------------

ADR -- American Depositary Receipt

+     Security exempt from registration under Rule 144A or Rule 145 of the
      Securities Act of 1933. These securities may be resold in transactions
      exempt from registration, normally to qualified institutional buyers. At
      April 30, 1998, the value of these securities amounted to $538,710,935 or
      9.3% of net assets.
*     Non-income producing security.
/(1)/ Security valued at fair value using methods determined in good faith by or
      at the direction of the Trustees.


                       See notes to financial statements

                                       17
<PAGE>

Tax-Managed Growth Portfolio as of April 30, 1998

FINANCIAL STATEMENTS (Unaudited)

Statement of Assets and Liabilities 


As of April 30, 1998
Assets
- --------------------------------------------------------------------------------
Investments, at value (Note 1A)
    (identified cost $4,000,420,308)                           $ 5,813,658,269
Cash                                                                   717,709
Dividends and interest receivable                                    4,394,381
Tax reclaim receivable                                                 121,594
Other assets                                                            15,734
Prepaid expenses                                                        78,230
Deferred organization expenses (Note 1C)                                 5,625
- --------------------------------------------------------------------------------
Total assets                                                   $ 5,818,991,542
- --------------------------------------------------------------------------------

Liabilities
- --------------------------------------------------------------------------------
Payable for investments purchased                              $    26,919,490
Payable to affiliate for Trustees' fees (Note 2)                         2,856
Accrued expenses                                                        96,355
- --------------------------------------------------------------------------------
Total liabilities                                              $    27,018,701
- --------------------------------------------------------------------------------
Net Assets applicable to investors' interest in                
    Portfolio                                                  $ 5,791,972,841 
- --------------------------------------------------------------------------------

Sources of Net Assets
- --------------------------------------------------------------------------------
Net proceeds from capital contributions and                    $ 3,978,733,433
    withdrawals                                      
Net unrealized appreciation of investments           
    (computed on the basis of identified cost)                   1,813,239,408
- --------------------------------------------------------------------------------
Total                                                          $ 5,791,972,841
- --------------------------------------------------------------------------------

Statement of Operations

For the Six Months
Ended April 30, 1998
Investment Income (Note 1F)
- --------------------------------------------------------------------------------
Dividends (net of foreign taxes, $305,713)                     $    23,598,717
Interest income                                                      3,981,921
- --------------------------------------------------------------------------------
Total income                                                   $    27,580,638
- --------------------------------------------------------------------------------
                                                     
Expenses                                             
- --------------------------------------------------------------------------------
Investment adviser fee (Note 2)                                $     9,349,095
Compensation of Trustees not members of the          
    Investment Adviser's organization (Note 2)                          16,376
Legal and accounting services                                          449,226
Custodian fee                                                          259,346
Amortization of organization expenses (Note 1C)                         10,297
Miscellaneous                                                          242,687
- --------------------------------------------------------------------------------
Total expenses                                                 $    10,327,027
- --------------------------------------------------------------------------------
                                                     
Net investment income                                          $    17,253,611
- --------------------------------------------------------------------------------

Realized and Unrealized
Gain (Loss) on Investments
- --------------------------------------------------------------------------------
Net realized gain (loss) --
    Investment transactions (identified cost basis)            $     5,622,063
- --------------------------------------------------------------------------------
Net realized gain on investments                               $     5,622,063
- --------------------------------------------------------------------------------
Change in unrealized appreciation (depreciation) -- 
    Investments (identified cost basis)                        $   758,404,874
    Foreign currency                                                     1,447
- --------------------------------------------------------------------------------
                                                    
Net change in unrealized appreciation               
    (depreciation) of investments                              $   758,406,321 
- --------------------------------------------------------------------------------
                                                    
Net realized and unrealized gain on investments                $   764,028,384
- --------------------------------------------------------------------------------
                                                    
Net increase in net assets from operations                     $   781,281,995
- --------------------------------------------------------------------------------


                       See notes to financial statements

                                      18
<PAGE>

Tax-Managed Growth Portfolio as of April 30, 1998

FINANCIAL STATEMENTS CONT'D

Statements of Changes in Net Assets


                                             
                                         Six Months Ended    Year Ended      
Increase (Decrease)                      April 30, 1998      October 31, 1997
in Net Assets                            (Unaudited)                    
- --------------------------------------------------------------------------------
From operations --                                                           
    Net investment income                $   17,253,611       $   14,399,615 
    Net realized gain on                                                     
        investment transactions               5,622,063           52,637,579 
    Net change in unrealized
        appreciation (depreciation)                                          
        of investments                      758,406,321          375,109,348 
- --------------------------------------------------------------------------------
Net increase in net assets                                                   
    from operations                      $  781,281,995       $  442,146,542 
- --------------------------------------------------------------------------------
Capital transactions --                                                      
    Contributions                        $2,270,240,902       $1,907,707,281 
    Withdrawals                            (130,995,874)        (415,207,575)
- --------------------------------------------------------------------------------
Net increase in net assets                                                   
    from capital transactions            $2,139,245,028       $1,492,499,706 
- --------------------------------------------------------------------------------
                                                                             
Net increase in net assets               $2,920,527,023       $1,934,646,248 
- --------------------------------------------------------------------------------

                                                                             
Net Assets                                                                   
- --------------------------------------------------------------------------------
At beginning of period                   $2,871,445,818       $  936,799,570 
- --------------------------------------------------------------------------------
At end of period                         $5,791,972,841       $2,871,445,818  
- --------------------------------------------------------------------------------


                       See notes to financial statements

                                      19
<PAGE>

Tax-Managed Growth Portfolio as of April 30, 1998

FINANCIAL STATEMENTS CONT'D

Supplementary Data
<TABLE> 
<CAPTION> 
                                                      Six Months Ended      
                                                      April 30, 1998         Year Ended            Period Ended     
                                                      (Unaudited)            October 31, 1997      October 31, 1996* 
- ---------------------------------------------------------------------------------------------------------------------
<S>                                                   <C>                    <C>                   <C> 
Ratios to average daily net assets
- ---------------------------------------------------------------------------------------------------------------------
Expenses                                                    0.54%+                  0.56%                   0.66%+
Net investment income                                       0.90%+                  0.81%                   0.91%+
Portfolio Turnover                                             2%                     14%                      6%
- ---------------------------------------------------------------------------------------------------------------------
Average commission rate (per share)/(1)/              $   0.0581               $   0.0582                $ 0.0585
- ---------------------------------------------------------------------------------------------------------------------
Net assets, end of period (000's omitted)             $5,791,973               $2,871,446                $936,800
- ---------------------------------------------------------------------------------------------------------------------
</TABLE> 

+     Annualized.
*     For the period from the start of business, December 1, 1995, to October
      31, 1996.
/(1)/ Average commission rate paid is computed by dividing the total dollar
      amount of commissions paid during the fiscal year by the total number of
      shares purchased and sold during the fiscal year for which commissions
      were charged.


                       See notes to financial statements

                                      20
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998

NOTES TO FINANCIAL STATEMENTS (Unaudited)


1 Significant Accounting Policies
  ------------------------------------------------------------------------------
  Tax-Managed Growth Portfolio (the Portfolio) is registered under the
  Investment Company Act of 1940, as amended, as a diversified, open-end
  management investment company. The Portfolio, which is organized as a trust
  under the laws of the State of New York on December 1, 1995, seeks to provide
  long-term after-tax returns by investing in a diversified portfolio of equity
  securities. The Declaration of Trust permits the Trustees to issue interests
  in the Portfolio. The following is a summary of significant accounting
  policies consistently followed by the Portfolio in the preparation of its
  financial statements. The policies are in conformity with generally accepted
  accounting principles.

  A Investment Valuations -- Marketable securities, including options, that are
  listed on foreign or U.S. securities exchanges or in the NASDAQ National
  Market System are valued at closing sale prices, on the exchange where such
  securities are principally traded. Futures positions on securities or
  currencies are generally valued at closing settlement prices. Unlisted or
  listed securities for which closing sale prices are not available are valued
  at the mean between the latest bid and asked prices. Short-term debt
  securities with a remaining maturity of 60 days or less are valued at
  amortized cost, which approximates value. Other fixed income and debt
  securities, including listed securities and securities for which price
  quotations are available, will normally be valued on the basis of valuations
  furnished by a pricing service. Investments for which valuations or market
  quotations are unavailable are valued at fair value using methods determined
  in good faith by or at the direction of the Trustees.

  B Income Taxes -- The Portfolio is treated as a partnership for Federal tax
  purposes. No provision is made by the Portfolio for federal or state taxes on
  any taxable income of the Portfolio because each investor in the Portfolio is
  ultimately responsible for the payment of any taxes on its share of such
  income. Since some of the Portfolio's investors are regulated investment
  companies that invest all or substantially all of their assets in the
  Portfolio, the Portfolio normally must satisfy the applicable source of income
  and diversification requirements (under the Internal Revenue Code) in order
  for its investors to satisfy them. The Portfolio will allocate, at least
  annually among its investors, each investor's distributive share of the
  Portfolio's net investment income, net realized capital gains, and any other
  items of income, gain, loss, deduction or credit.

  C Deferred Organization Expenses -- Costs incurred by the Portfolio in
  connection with its organization, are being amortized on the straight-line
  basis over five years.

  D Futures Contracts -- Upon the entering of a financial futures contract, the
  Portfolio is required to deposit either in cash or securities an amount
  ("initial margin") equal to a certain percentage of the purchase price
  indicated in the financial futures contract. Subsequent payments are made or
  received by the Portfolio ("margin maintenance") each day, dependent on daily
  fluctuations in the value of the underlying security, and are recorded for
  book purposes as unrealized gains or losses by the Portfolio. The Portfolio's
  investment in financial futures contracts is designed to hedge against
  anticipated future changes in price of current or anticipated portfolio
  positions. Should prices move unexpectedly, the Portfolio may not achieve the
  anticipated benefits of the financial futures contracts and may realize a
  loss.

  E Securities Sold Short -- The Portfolio may sell securities it does not own
  in anticipation of a decline in the market price of the securities or in order
  to hedge portfolio positions. The Portfolio will generally borrow the security
  sold in order to make delivery to the buyer. Upon executing the transaction,
  the Portfolio records the proceeds as deposits with brokers in the Statement
  of Assets and Liabilities and establishes an offsetting payable for securities
  sold short for the securities due on settlement. The proceeds are retained by
  the broker as collateral for the short position. The liability is marked to
  market and the Portfolio is required to pay the lending broker any dividend or
  interest income earned while the short position is open. A gain or loss is
  recorded when the security is delivered to the broker. The Portfolio may
  recognize a loss on the transaction if the market value of the securities sold
  increases before the securities are delivered.

  F Other -- Investment transactions are accounted for on the date the
  investments are purchased or sold. Dividend income is recorded on the ex-
  dividend date. However, if the ex-dividend date has passed, certain dividends
  from foreign securities are recorded as the Portfolio is informed of the ex-
  dividend date. Interest income is recorded on the accrual basis.

  G Use of Estimates -- The preparation of financial statements in conformity
  with generally accepted accounting principles requires management to make
  estimates and assumptions that affect the reported amounts of assets and
  liabilities at the date of the financial statements and the reported amounts
  of revenue and


                                      21
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998 

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D


  expense during the reporting period. Actual results could differ from those
  estimates.

  H Expense Reduction -- Investors Bank & Trust Company (IBT) serves as
  custodian of the Portfolio. Pursuant to the custodian agreement, IBT receives
  a fee reduced by credits which are determined based on the average daily cash
  balances the Portfolio maintains with IBT. All significant credit balances
  used to reduce the Portfolio's custodian fees are reflected as a reduction of
  expenses on the statement of operations.

  I Interim Financial Information -- The interim financial statements relating
  to April 30, 1998 and for the six-month period then ended have not been
  audited by independent certified public accountants, but in the opinion of the
  Portfolio's management, reflect all adjustments, consisting only of normal
  recurring adjustments necessary for the fair presentation of the financial
  statements.

2 Investment Adviser Fee and Other Transactions with Affiliates
  ------------------------------------------------------------------------------
  The investment adviser fee is earned by Boston Management and Research (BMR),
  a wholly-owned subsidiary of Eaton Vance Management (EVM), as compensation for
  management and investment advisory services rendered to the Portfolio. Under
  the advisory agreement, BMR receives a monthly advisory fee of 5/96 of 1%
  (0.625% annually) of the average daily net assets of the Portfolio up to
  $500,000,000, and at reduced rates as daily net assets exceed that level. For
  the six month period ended April 30, 1998, the adviser fee was 0.49% of the
  Portfolio's average net assets (annualized). Except as to Trustees of the
  Portfolio who are not members of EVM's or BMR's organization, officers and
  Trustees receive remuneration for their services to the Portfolio out of such
  investment adviser fee. Trustees of the Portfolio that are not affiliated with
  the Investment Adviser may elect to defer receipt of all or a percentage of
  their annual fees in accordance with the terms of the Trustees Deferred
  Compensation Plan. For the six month period ended April 30, 1998, no
  significant amounts have been deferred. Certain of the officers and Trustees
  of the Portfolio are officers or directors/trustees of the above
  organizations.

3 Investment Transactions
  ------------------------------------------------------------------------------
  Purchases and sales of investments, other than short-term obligations,
  aggregated $2,184,250,541 and $65,206,232, respectively. In addition,
  investments having an aggregate market value of $25,484,816 at dates of
  withdrawal were distributed in payment for capital withdrawals resulting in
  capital gains for book purposes of $23,796,960.


4 Federal Income Tax Basis of Investment
  ------------------------------------------------------------------------------
  The cost and unrealized appreciation (depreciation) in value of the
  investments owned at April 30, 1998, as computed on a federal income tax
  basis, are as follows:

  Aggregate cost                                          $4,000,420,308
  ------------------------------------------------------------------------------
  Gross unrealized appreciation                           $1,813,836,547

  Gross unrealized depreciation                                 (598,586)
  ------------------------------------------------------------------------------

  Net unrealized appreciation                             $1,813,237,961
  ------------------------------------------------------------------------------

5 Financial Instruments
  ------------------------------------------------------------------------------
  The Portfolio may trade in financial instruments with off-balance sheet risk
  in the normal course of its investing activities to assist in managing
  exposure to various market risks. These financial instruments include written
  options, forward foreign currency exchange contracts and financial futures
  contracts and may involve, to a varying degree, elements of risk in excess of
  the amounts recognized for financial statement purposes.

  The notional or contractual amounts of these instruments represent the
  investment the Portfolio has in particular classes of financial instruments
  and does not necessarily represent the amounts potentially subject to risk.
  The measurement of the risks associated with these instruments is meaningful
  only when all related and offsetting transactions are considered.

  The Portfolio did not have any open obligations under these financial
  instruments at April 30, 1998.


                                      22
<PAGE>
 
Tax-Managed Growth Portfolio as of April 30, 1998 

NOTES TO FINANCIAL STATEMENTS (Unaudited) CONT'D


6 Line of Credit

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

  The Portfolio participates with other portfolios and funds managed by BMR and
  EVM and its affiliates in a $100 million unsecured line of credit agreement
  with a group of banks. The Portfolio may temporarily borrow from the line of
  credit to satisfy redemption requests or settle investment transactions.
  Interest is charged to each portfolio or fund based on its borrowings at the
  Eurodollar rate or federal funds rate. In addition, a fee computed at an
  annual rate of 0.10% on the daily unused portion of the line of credit is
  allocated among the participating portfolios and funds at the end of each
  quarter. The Portfolio did not have any significant borrowings or allocated
  fees during the six month period ended April 30, 1998.




                                      23
<PAGE>
 
Diversification Fund as of April 30, 1998

INVESTMENT MANAGEMENT

Diversification Fund

Officers
James B. Hawkes
President and Trustee

James L. O'Connor
Treasurer

Alan R. Dynner
Secretary

Other Trustees
Landon T. Clay

Donald R. Dwight
President, Dwight Partners, Inc.

Samuel L. Hayes, III
Jacob H. Schiff Professor of Investment
Banking, Harvard University Graduate School of Business Administration

Norton H. Reamer
Chairman and Chief Executive Officer, United Asset Management Corporation

John L. Thorndike
Formerly Director, Fiduciary Company Incorporated

Jack L. Treynor
Investment Adviser and Consultant


Tax-Managed Growth Portfolio


Officers
James B. Hawkes
President and Trustee

Duncan W. Richardson
Vice President and Portfolio Manager

James L. O'Connor
Treasurer

Alan R. Dynner
Secretary

Other Trustees
Landon T. Clay

Donald R. Dwight
President, Dwight Partners, Inc.

Samuel L. Hayes, III
Jacob H. Schiff Professor of Investment Banking, Harvard University Graduate
School of Business Administration

Norton H. Reamer
Chairman and Chief Executive Officer, United Asset Management Corporation

John L. Thorndike
Formerly Director, Fiduciary Company Incorporated

Jack L. Treynor
Investment Adviser and Consultant



                                      24
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<PAGE>

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<PAGE>
 
Investment Adviser of Tax-Managed Growth Portfolio

Boston Management and Research

24 Federal Street
Boston, MA 02110

Administrator of Diversification Fund

Eaton Vance Management

24 Federal Street
Boston, MA 02110

Custodian

Investors Bank & Trust Company

200 Clarendon Street, 16th Floor
Boston, MA 02116

Transfer and Dividend Disbursing Agent

First Data Investor Services Group

Attention:  Eaton Vance Funds
P.O. Box 5123
Westborough, MA 01581-5123





Diversification Fund
24 Federal Street
Boston, MA 02110




- --------------------------------------------------------------------------------
   This report must be preceded or accompanied by a current prospectus which
                contains more complete information on the Fund.
- --------------------------------------------------------------------------------

                                                                    DIVSRC-6/98


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