UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSRS

              CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT
                              INVESTMENT COMPANIES

Investment Company Act file number 811-9637
                                   811-9739

Name of Fund: Merrill Lynch Large Cap Growth Fund of Merrill Lynch Large Cap
              Series Funds, Inc.
              Master Large Cap Growth Portfolio of Master Large Cap Series Trust

Fund Address: P.O. Box 9011
              Princeton, NJ 08543-9011

Name and address of agent for service: Terry K. Glenn, President, Merrill Lynch
        Large Cap Growth Fund of Merrill Lynch Large Cap Series Funds, Inc. and
        Master Large Cap Growth Portfolio of Master Large Cap Series Trust, 800
        Scudders Mill Road, Plainsboro, NJ 08536. Mailing address: P.O. Box
        9011, Princeton, NJ 08543-9011

Registrant's telephone number, including area code: (609) 282-2800

Date of fiscal year end: 10/31/04

Date of reporting period: 11/01/03 - 04/30/04

Item 1 - Report to Stockholders



[LOGO] Merrill Lynch Investment Managers                         www.mlim.ml.com

                                Merrill Lynch
                                Large Cap Growth Fund
                                Of Merrill Lynch Large Cap Series Funds, Inc.

Semi-Annual Report
April 30, 2004



[LOGO] Merrill Lynch Investment Managers

Merrill Lynch Large Cap Growth Fund

Portfolio Information as of April 30, 2004

                                                                      Percent of
Ten Largest Equity Holdings                                           Net Assets
- --------------------------------------------------------------------------------
General Electric Company ...........................................      3.7%
Pfizer, Inc. .......................................................      3.7
Cisco Systems, Inc. ................................................      3.1
Microsoft Corporation ..............................................      2.4
QUALCOMM Incorporated ..............................................      1.9
Altria Group, Inc. .................................................      1.5
Genentech, Inc. ....................................................      1.5
Yahoo! Inc. ........................................................      1.5
Zimmer Holdings, Inc. ..............................................      1.4
The Gap, Inc. ......................................................      1.3
- --------------------------------------------------------------------------------

                                                                      Percent of
Five Largest Industries*                                              Net Assets
- --------------------------------------------------------------------------------
Specialty Retail ..................................................      9.8%
Communications Equipment ..........................................      9.0
Semiconductors & Semiconductor Equipment ..........................      7.3
Software ..........................................................      6.7
Pharmaceuticals ...................................................      5.8
- --------------------------------------------------------------------------------
*     For Portfolio compliance purposes, "Industries" means any one or more of
      the industry sub-classifications used by one or more widely recognized
      market indexes or ratings group indexes, and/or as defined by Portfolio
      management. This definition may not apply for purposes of this report,
      which may combine such industry sub-classifications for reporting ease.


2       MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


A Letter From the President

Dear Shareholder

Equity markets produced positive results for the most recent six-month and
12-month reporting periods. The U.S. stock market, as measured by the Standard &
Poor's 500 Index, returned +6.27% for the six-month period and +22.88% for the
12-month period ended April 30, 2004.

Though equity markets enjoyed favorable returns overall, we did experience an
overdue market correction late in the period. This was largely in response to
disappointing employment news (which has improved markedly since then),
terrorist attacks in Madrid and instability in Iraq -- all of which weighed
heavily on the markets. However, despite the more recent skittishness, we still
observe substantial economic strength in the United States.

In fact, the U.S. economy has continued to benefit from 2003's significant
fiscal and monetary stimulus in the form of low interest rates and tax cuts.
This has opened the door to consumer spending, capital spending, increases in
exports and long-awaited job growth. A major shift on the employment front came
on April 2 when the Department of Labor reported the biggest monthly jobs
increase in four years. These developments have supported continued improvements
in corporate earnings -- a positive for stock markets. For its part, the Federal
Reserve Board maintained its accommodative policy stance, and is expected to
raise interest rates at a gradual pace in order to ensure the sustainability of
the current economic recovery.

The events and efforts of the past year leave us with a much stronger economy
today. Of course, markets will always fluctuate, and there are many
uncertainties -- not the least of which are geopolitical in nature -- which can
translate into negative market movements. Keeping this in mind, however, we
encourage you to revisit your portfolio and your asset allocation strategy to
ensure you are well positioned to take advantage of the opportunities that lie
ahead. Importantly, your financial advisor can help you develop a strategy most
suitable for your circumstances through all types of market and economic cycles.

We thank you for trusting Merrill Lynch Investment Managers with your investment
assets, and we look forward to serving you in the months and years ahead.

                                                Sincerely,


                                                /s/ Terry K. Glenn

                                                Terry K. Glenn
                                                President and Director/Trustee


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004         3


[LOGO] Merrill Lynch Investment Managers

A Discussion With Your Fund's Portfolio Manager

      Despite a favorable backdrop of improving corporate earnings and economic
revitalization, an equity market correction late in the period produced a drag
on Fund performance.

How did the Fund perform during the period in light of the existing market
conditions?

For the six-month period ended April 30, 2004, Merrill Lynch Large Cap Growth
Fund's Class A, Class B, Class C, Class I and Class R Shares had total returns
of +1.39%, +1.04%, +1.05%, +1.51% and +1.29%, respectively. (Fund results shown
do not reflect sales charges and would be lower if sales charges were included.
Complete performance information can be found on pages 6 and 7 of this report to
shareholders.) While these returns reflect positive absolute results, the Fund's
relative performance trailed the +4.14% return of the unmanaged benchmark, the
Russell 1000 Growth Index, for the same period. In addition, the Fund
underperformed its comparable Lipper category of Large-Cap Growth Funds, which
posted a return of +2.42% for the same six-month period. (Funds in this Lipper
category seek long-term growth of capital by investing in large-capitalization
companies with long-term earnings expected to grow significantly faster than the
earnings of the stocks represented in a major unmanaged stock index.)
Importantly, over the long-term, the Fund has consistently outperformed its
benchmark, the Russell 1000 Growth Index.

Because the Fund invests in large-capitalization stocks that represent a
significant part of the U.S. stock market, its portfolio was influenced by the
same economic and market events that affected the broader stock market during
the period. The last quarter of 2003 and the first quarter of 2004 were marked
by dramatic rises and falls in world markets, with the equity markets undergoing
a correction in the spring of 2004, despite strong economic growth and robust
corporate earnings.

What factors influenced Fund performance during the period?

The Fund invests primarily in a diversified portfolio of large cap companies
selected from securities found in the Russell 1000 Index. During the past six
months, the Portfolio was positioned in economically sensitive cyclical stocks.
Despite improving corporate earnings and economic revitalization, a combination
of interest rate fears, rising energy prices, risks to growth in China and a
destabilized U.S. dollar pushed equity prices lower late in the period. Given
the Portfolio's heightened exposure to stocks leveraged to economic recovery and
a market upturn, the correction had a greater impact on the Portfolio and
ultimately resulted in the underperformance of the Fund relative to both its
benchmark and its Lipper peers.

Stock selection in the consumer discretionary and health care sectors benefited
performance during the period. The Portfolio's overweight position in
telecommunication services also contributed to performance. On the negative
side, stock selection in information technology and consumer staples hindered
results.

At the individual stock level, the largest positive contributors to performance
were Sprint Corp. (PCS), Genentech, Inc., DaVita, Inc., Motorola, Inc. and
Waters Corporation. The largest detractors from performance included Amkor
Technology, Inc., Foundry Networks, Inc., Emulex Corporation, SanDisk
Corporation and ITT Educational Services, Inc.. Underweights in Exxon Mobil
Corporation and The Gillette Company also negatively affected performance.

What changes were made to the Portfolio during the period?

We increased our positions relative to the benchmark in the materials,
financials and consumer staples sectors based on our belief that stocks in these
sectors would benefit as we transition from an economic recovery to an
environment of rising interest rates. We reduced our position relative to the
benchmark in information technology and telecommunication services in light of
improved valuations and decelerating growth in these sectors.

The largest purchases during the period included Cisco Systems, Inc., QUALCOMM
Incorporated, Altria Group, Inc., Yahoo! Inc. and Texas Instruments
Incorporated. The largest sales included Intel Corporation, Sprint Corp. (PCS),
National Semiconductor Corporation, Staples, Inc. and American Tower
Corporation.


4       MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


How would you characterize the Portfolio's position at the close of the period?

The Portfolio's largest overweights as of April 30, 2004 were in the consumer
discretionary and information technology sectors, which we believe should
benefit from strong earnings growth. The largest underweights were in
financials, which tend to underperform in periods of rising interest rates, and
telecommunication services.

Companies exhibiting good earnings momentum, earnings surprise and valuation
characteristics saw strong performance through the end of 2003. However,
relative performance for these companies deteriorated as the broad markets
turned downward in spring 2004. We remain committed to these disciplines for
stock selection, and the Portfolio ended the period positioned in cyclical
stocks that we believe should benefit as investor focus returns to the robust
corporate earnings environment. Nonetheless, given the recent equity market
correction and interest rate pressures, we are moderating our exposure to
economic sensitivity as well as reducing our exposure to lower-capitalization
securities. Our intention is to continue to reduce the interest rate sensitivity
of the Portfolio as rates continue to increase.

The Federal Funds futures market now projects a near certain hike in the Federal
Funds target rate in June with another potential increase in August. We believe
the economy is stronger than many expected at this point. Strong payroll reports
for March and April, as well as recent data from the Institute for Supply
Management survey, indicate that a sustainable economic recovery is underway,
which should continue to support consumption and other business activity. We
believe a modest increase in inflation also is underway, and our projection at
the beginning of the year that the Federal Reserve Board would double its rate
from 1% to 2% by year-end currently seems more realistic.

The equity market correction, while not a surprise, has been more significant
than expected, particularly given the boom in corporate earnings. Our view is
that there is at least one more up-leg in the equity market before the cyclical
backdrop becomes a problem. The timing of this rally will hinge on when the
Treasury market calms, the dollar stabilizes or resumes its slow decline, and
oil prices ease. Some combination of these factors should set the stage for more
focus on earnings and a better equity market. In the meantime, sluggishness in
stock prices is likely to persist. We will continue to monitor economic and
market developments in order to make the most informed decisions regarding the
Portfolio's investments.

Robert C. Doll, Jr.
Senior Vice President and Senior Portfolio Manager

May 24, 2004


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004         5


[LOGO] Merrill Lynch Investment Managers

Performance Data

About Fund Performance

Investors are able to purchase shares of the Fund through multiple pricing
alternatives:

o     Class A Shares incur a maximum initial sales charge of 5.25% and an
      account maintenance fee of 0.25% (but no distribution fee).

o     Class B Shares are subject to a maximum contingent deferred sales charge
      of 4% declining to 0% after six years. All Class B Shares purchased prior
      to June 1, 2001 will maintain the four-year schedule. In addition, Class B
      Shares are subject to a distribution fee of 0.75% and an account
      maintenance fee of 0.25%. These shares automatically convert to Class A
      Shares after approximately eight years. (There is no initial sales charge
      for automatic share conversions.)

o     Class C Shares are subject to a distribution fee of 0.75% and an account
      maintenance fee of 0.25%. In addition, Class C Shares are subject to a 1%
      contingent deferred sales charge if redeemed within one year of purchase.

o     Class I Shares incur a maximum initial sales charge (front-end load) of
      5.25% and bear no ongoing distribution or account maintenance fees. Class
      I Shares are available only to eligible investors.

o     Class R Shares do not incur a maximum sales charge (front-end load) or
      deferred sales charge. These shares are subject to a distribution fee of
      0.25% and an account maintenance fee of 0.25%. Class R Shares are
      available only to certain retirement plans.

None of the past results shown should be considered a representation of future
performance. Current performance may be lower or higher than the performance
data quoted. Refer to www.mlim.ml.com to obtain more current performance
information. Performance results do not reflect the deduction of taxes that a
shareholder would pay on fund distributions or the redemption of fund shares.
Figures shown in each of the following tables assume reinvestment of all
dividends and capital gain distributions, if any, at net asset value on the
ex-dividend date. Investment return and principal value of shares will fluctuate
so that shares, when redeemed, may be worth more or less than their original
cost. Dividends paid to each class of shares will vary because of the different
levels of account maintenance, distribution and transfer agency fees applicable
to each class, which are deducted from the income available to be paid to
shareholders.

Recent Performance Results



                                               6-Month         12-Month     Since Inception
As of April 30, 2004                        Total Return     Total Return    Total Return
===========================================================================================
                                                                    
ML Large Cap Growth Fund Class A Shares*        +1.39%          +26.78%         -19.96%
- -------------------------------------------------------------------------------------------
ML Large Cap Growth Fund Class B Shares*        +1.04           +25.85          -22.59
- -------------------------------------------------------------------------------------------
ML Large Cap Growth Fund Class C Shares*        +1.05           +25.69          -22.68
- -------------------------------------------------------------------------------------------
ML Large Cap Growth Fund Class I Shares*        +1.51           +27.00          -19.06
- -------------------------------------------------------------------------------------------
ML Large Cap Growth Fund Class R Shares*        +1.29           +26.86          +27.27
- -------------------------------------------------------------------------------------------
Russell 1000 Growth Index**                     +4.14           +21.65       -41.15/+25.06
- -------------------------------------------------------------------------------------------


*     Investment results shown do not reflect sales charges; results shown would
      be lower if a sales charge was included. Total investment returns are
      based on changes in net asset values for the periods shown, and assume
      reinvestment of all dividends and capital gains distributions at net asset
      value on the ex-dividend date. Performance results are for a limited asset
      pool. The Fund's since inception periods are from 12/22/99 for Class A,
      Class B, Class C and Class I Shares and from 1/03/03 for Class R Shares.
**    This unmanaged broad-based Index is a subset of the Russell 1000 Index
      consisting of those Russell 1000 securities with a greater-than-average
      growth orientation. Since inception total returns are from 12/22/99 and
      1/03/03.


6       MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Performance Data (concluded)

Average Annual Total Return

                                                Return Without    Return With
                                                 Sales Charge    Sales Charge**
===============================================================================
Class A Shares*
===============================================================================
One Year Ended 4/30/04                              +26.78%         +20.13%
- -------------------------------------------------------------------------------
Inception (12/22/99)
through 4/30/04                                     - 4.98          - 6.15
- -------------------------------------------------------------------------------
*     Maximum sales charge is 5.25%.
**    Assuming maximum sales charge.

                                                    Return          Return
                                                 Without CDSC     With CDSC**
===============================================================================
Class B Shares*
===============================================================================
One Year Ended 4/30/04                              +25.85%         +21.85%
- -------------------------------------------------------------------------------
Inception (12/22/99)
through 4/30/04                                     - 5.71          - 6.14
- -------------------------------------------------------------------------------
*     Maximum contingent deferred sales charge is 4% and is reduced to 0% after
      six years.
**    Assuming payment of applicable contingent deferred sales charge.

- -------------------------------------------------------------------------------
                                                   Return           Return
                                                Without CDSC      With CDSC**
===============================================================================
Class C Shares*
===============================================================================
One Year Ended 4/30/04                              +25.69%         +24.69%
- -------------------------------------------------------------------------------
Inception (12/22/99)
through 4/30/04                                     - 5.73          - 5.73
- -------------------------------------------------------------------------------
*     Maximum contingent deferred sales charge is 1% and is reduced to 0% after
      one year.
**    Assuming payment of applicable contingent deferred sales charge.

- -------------------------------------------------------------------------------
                                                Return Without    Return With
                                                 Sales Charge    Sales Charge**
===============================================================================
Class I Shares*
===============================================================================
One Year Ended 4/30/04                              +27.00%         +20.33%
- -------------------------------------------------------------------------------
Inception (12/22/99)
through 4/30/04                                     - 4.74          - 5.91
- -------------------------------------------------------------------------------
*     Maximum sales charge is 5.25%.
**    Assuming maximum sales charge.

- -------------------------------------------------------------------------------
                                                                 Return Without
                                                                  Sales Charge
===============================================================================
Class R Shares
===============================================================================
One Year Ended 4/30/04                                              +26.86%
- -------------------------------------------------------------------------------
Inception (1/03/03) through 4/30/04                                 +20.04
- -------------------------------------------------------------------------------


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004         7


[LOGO] Merrill Lynch Investment Managers

Statement of Assets and Liabilities          Merrill Lynch Large Cap Growth Fund


As of April 30, 2004
====================================================================================================================
Assets
- --------------------------------------------------------------------------------------------------------------------
                                                                                                 
                   Investment in Master Large Cap Growth Portfolio, at value
                    (identified cost--$267,193,059) .............................                      $ 293,094,805
                   Prepaid expenses .............................................                             38,431
                                                                                                       -------------
                   Total assets .................................................                        293,133,236
                                                                                                       -------------
====================================================================================================================
Liabilities
- --------------------------------------------------------------------------------------------------------------------
                   Payables:
                      Distributor ...............................................    $     167,473
                      Other affiliates ..........................................          108,800
                      Administrator .............................................           72,672           348,945
                                                                                     -------------
                   Accrued expenses and other liabilities .......................                             17,381
                                                                                                       -------------
                   Total liabilities ............................................                            366,326
                                                                                                       -------------
====================================================================================================================
Net Assets
- --------------------------------------------------------------------------------------------------------------------
                   Net assets ...................................................                      $ 292,766,910
                                                                                                       =============
====================================================================================================================
Net Assets Consist of
- --------------------------------------------------------------------------------------------------------------------
                   Class A Shares of Common Stock, $.10 par value, 100,000,000
                    shares authorized ...........................................                      $     469,155
                   Class B Shares of Common Stock, $.10 par value, 200,000,000
                    shares authorized ...........................................                          1,296,178
                   Class C Shares of Common Stock, $.10 par value, 100,000,000
                    shares authorized ...........................................                          1,060,626
                   Class I Shares of Common Stock, $.10 par value, 100,000,000
                    shares authorized ...........................................                            851,022
                   Class R Shares of Common Stock, $.10 par value, 200,000,000
                    shares authorized ...........................................                             52,642
                   Paid-in capital in excess of par .............................                        358,586,053
                   Accumulated investment loss--net .............................    $  (1,660,101)
                   Accumulated realized capital losses on investments allocated
                    from the Portfolio--net .....................................      (93,790,411)
                   Unrealized appreciation on investments allocated from the
                    Portfolio--net ..............................................       25,901,746
                                                                                     -------------
                   Total accumulated losses--net ................................                        (69,548,766)
                                                                                                       -------------
                   Net Assets ...................................................                      $ 292,766,910
                                                                                                       =============
====================================================================================================================
Net Asset Value
- --------------------------------------------------------------------------------------------------------------------
                   Class A--Based on net assets of $37,520,084 and 4,691,546
                    shares outstanding ..........................................                      $        8.00
                                                                                                       =============
                   Class B--Based on net assets of $100,296,903 and 12,961,780
                    shares outstanding ..........................................                      $        7.74
                                                                                                       =============
                   Class C--Based on net assets of $81,984,341 and 10,606,262
                    shares outstanding ..........................................                      $        7.73
                                                                                                       =============
                   Class I--Based on net assets of $68,837,689 and 8,510,222
                    shares outstanding ..........................................                      $        8.09
                                                                                                       =============
                   Class R--Based on net assets of $4,127,893 and 526,418
                    shares outstanding ..........................................                      $        7.84
                                                                                                       =============


      See Notes to Financial Statements.


8       MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Statement of Operations                      Merrill Lynch Large Cap Growth Fund


For the Six Months Ended April 30, 2004
====================================================================================================================
Investment Income Allocated from the Portfolio--Net
- --------------------------------------------------------------------------------------------------------------------
                                                                                                 
                   Net investment income allocated from the Portfolio:
                      Dividends (net of $810 foreign withholding tax) ...........                      $     854,338
                      Securities lending--net ...................................                             13,136
                      Interest from affiliates ..................................                              4,393
                      Expenses ..................................................                           (814,749)
                                                                                                       -------------
                   Net investment income allocated from the Portfolio ...........                             57,118
                                                                                                       -------------
====================================================================================================================
Expenses
- --------------------------------------------------------------------------------------------------------------------
                   Account maintenance and distribution fees--Class B ...........    $     524,182
                   Account maintenance and distribution fees--Class C ...........          385,033
                   Administration fees ..........................................          347,517
                   Transfer agent fees--Class B .................................          124,494
                   Transfer agent fees--Class C .................................           91,624
                   Transfer agent fees--Class I .................................           63,854
                   Printing and shareholder reports .............................           40,772
                   Account maintenance fees--Class A ............................           38,978
                   Registration fees ............................................           37,598
                   Transfer agent fees--Class A .................................           31,728
                   Professional fees ............................................           12,402
                   Account maintenance and distribution fees--Class R ...........            4,416
                   Transfer agent fees--Class R .................................            2,217
                   Other ........................................................           12,404
                                                                                     -------------
                   Total expenses ...............................................                          1,717,219
                                                                                                       -------------
                   Investment loss--net .........................................                         (1,660,101)
                                                                                                       -------------
====================================================================================================================
Realized & Unrealized Gain on Investments Allocated from the Portfolio--Net
- --------------------------------------------------------------------------------------------------------------------
                   Realized gain on investments allocated from the Portfolio--net                         16,932,616
                   Change in unrealized appreciation on investments allocated
                    from the Portfolio--net .....................................                        (14,229,748)
                                                                                                       -------------
                   Total realized and unrealized gain on investments allocated
                    from the Portfolio--net .....................................                          2,702,868
                                                                                                       -------------
                   Net Increase in Net Assets Resulting from Operations .........                      $   1,042,767
                                                                                                       =============


      See Notes to Financial Statements.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004         9


[LOGO] Merrill Lynch Investment Managers

Statements of Changes In Net Assets          Merrill Lynch Large Cap Growth Fund



                                                                                       For the Six         For the
                                                                                      Months Ended       Year Ended
                                                                                        April 30,        October 31,
Increase (Decrease) in Net Assets:                                                        2004              2003
====================================================================================================================
Operations
- --------------------------------------------------------------------------------------------------------------------
                                                                                                 
                   Investment loss--net .........................................    $  (1,660,101)    $  (2,682,487)
                   Realized gain on investments allocated from the Portfolio--net       16,932,616        10,079,577
                   Change in unrealized appreciation on investments allocated
                    from the Portfolio--net .....................................      (14,229,748)       37,997,575
                                                                                     -------------------------------
                   Net increase in net assets resulting from operations .........        1,042,767        45,394,665
                                                                                     -------------------------------
====================================================================================================================
Capital Share Transactions
- --------------------------------------------------------------------------------------------------------------------
                   Net increase in net assets derived from capital share
                    transactions ................................................       41,841,275        20,027,496
                                                                                     -------------------------------
====================================================================================================================
Net Assets
- --------------------------------------------------------------------------------------------------------------------
                   Total increase in net assets .................................       42,884,042        65,422,161
                   Beginning of period ..........................................      249,882,868       184,460,707
                                                                                     -------------------------------
                   End of period* ...............................................    $ 292,766,910     $ 249,882,868
                                                                                     ===============================
                      * Accumulated investment loss .............................    $  (1,660,101)               --
                                                                                     ===============================


      See Notes to Financial Statements.


10      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Financial Highlights                         Merrill Lynch Large Cap Growth Fund



                                                                                           Class A
The following per share data and ratios have been       ----------------------------------------------------------------------------
derived from information provided in the financial      For the Six                                                   For the Period
statements.                                             Months Ended           For the Year Ended October 31,++       Dec. 22, 1999+
                                                          April 30,        -----------------------------------------  to October 31,
Increase (Decrease) in Net Asset Value:                     2004             2003            2002           2001           2000++
====================================================================================================================================
Per Share Operating Performance
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                          
                   Net asset value, beginning of period   $   7.89         $   6.39        $   7.47       $  11.32       $  10.00
                                                          --------------------------------------------------------------------------
                   Investment loss--net ...............       (.03)@@@         (.05)@@@        (.06)@@@       (.07)@@@       (.01)
                   Realized and unrealized gain (loss)
                    on investments allocated from the
                    Portfolio--net ....................        .14             1.55           (1.02)         (3.78)          1.33
                                                          --------------------------------------------------------------------------
                   Total from investment operations ...        .11             1.50           (1.08)         (3.85)          1.32
                                                          --------------------------------------------------------------------------
                   Less distributions in excess of
                    realized gain on investments
                    allocated from the Portfolio--net .         --               --              --             --@@           --
                                                          --------------------------------------------------------------------------
                   Net asset value, end of period .....   $   8.00         $   7.89        $   6.39       $   7.47       $  11.32
                                                          ==========================================================================
====================================================================================================================================
Total Investment Return**
- ------------------------------------------------------------------------------------------------------------------------------------
                   Based on net asset value per share .       1.39%@          23.47%         (14.46%)       (33.98%)        13.20%@
                                                          ==========================================================================
====================================================================================================================================
Ratios to Average Net Assets
- ------------------------------------------------------------------------------------------------------------------------------------
                   Expenses, net of reimbursement*** ..       1.37%*           1.46%           1.54%          1.38%          1.74%*
                                                          ==========================================================================
                   Expenses*** ........................       1.37%*           1.46%           1.56%          1.38%          3.94%*
                                                          ==========================================================================
                   Investment loss--net ...............       (.74%)*          (.81%)          (.88%)         (.90%)        (1.14%)*
                                                          ==========================================================================
====================================================================================================================================
Supplemental Data
- ------------------------------------------------------------------------------------------------------------------------------------
                   Net assets, end of period
                    (in thousands) ....................   $ 37,520         $ 27,410        $ 15,874       $ 15,032       $  7,540
                                                          ==========================================================================
                   Portfolio turnover of Master Large
                    Cap Growth Portfolio ..............      64.77%          178.11%         177.46%        230.34%         94.75%
                                                          ==========================================================================


*     Annualized.
**    Total investment returns exclude the effects of sales charges.
***   Includes the Fund's share of the Portfolio's allocated expenses.
+     Commencement of operations.
++    Effective April 14, 2003, Class D Shares were redesignated Class A Shares.
@     Aggregate total investment return.
@@    Amount is less than $(.01) per share.
@@@   Based on average shares outstanding.

      See Notes to Financial Statements.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        11


[LOGO] Merrill Lynch Investment Managers

Financial Highlights (continued)             Merrill Lynch Large Cap Growth Fund



                                                                                           Class B
The following per share data and ratios have been       ----------------------------------------------------------------------------
derived from information provided in the financial      For the Six                                                   For the Period
statements.                                             Months Ended            For the Year Ended October 31,        Dec. 22, 1999+
                                                          April 30,        -----------------------------------------  to October 31,
Increase (Decrease) in Net Asset Value:                     2004             2003            2002           2001           2000
====================================================================================================================================
Per Share Operating Performance
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                          
                   Net asset value, beginning of period   $   7.66         $   6.25        $   7.37       $  11.26       $  10.00
                                                          --------------------------------------------------------------------------
                   Investment loss--net ...............       (.06)@@@         (.10)@@@        (.12)@@@       (.14)@@@       (.01)
                   Realized and unrealized gain (loss)
                    on investments allocated from the
                    Portfolio--net ....................        .14             1.51           (1.00)         (3.75)          1.27
                                                          --------------------------------------------------------------------------
                   Total from investment operations ...        .08             1.41           (1.12)         (3.89)          1.26
                                                          --------------------------------------------------------------------------
                   Less distributions in excess of
                    realized gain on investments
                    allocated from the Portfolio--net .         --               --              --             --@@           --
                                                          --------------------------------------------------------------------------
                   Net asset value, end of period .....   $   7.74         $   7.66        $   6.25       $   7.37       $  11.26
                                                          ==========================================================================
====================================================================================================================================
Total Investment Return**
- ------------------------------------------------------------------------------------------------------------------------------------
                   Based on net asset value per share .       1.04%@          22.56%         (15.20%)       (34.54%)        12.60%@
                                                          ==========================================================================
====================================================================================================================================
Ratios to Average Net Assets
- ------------------------------------------------------------------------------------------------------------------------------------
                   Expenses, net of reimbursement*** ..       2.14%*           2.27%           2.32%          2.17%          2.56%*
                                                          ==========================================================================
                   Expenses*** ........................       2.14%*           2.27%           2.34%          2.17%          4.14%*
                                                          ==========================================================================
                   Investment loss--net ...............      (1.51%)*         (1.61%)         (1.66%)        (1.67%)        (1.82%)*
                                                          ==========================================================================
====================================================================================================================================
Supplemental Data
- ------------------------------------------------------------------------------------------------------------------------------------
                   Net assets, end of period
                    (in thousands) ....................   $100,297         $100,683        $ 83,726       $ 70,428       $ 47,370
                                                          ==========================================================================
                   Portfolio turnover of Master Large
                    Cap Growth Portfolio ..............      64.77%          178.11%         177.46%        230.34%         94.75%
                                                          ==========================================================================


*     Annualized.
**    Total investment returns exclude the effects of sales charges.
***   Includes the Fund's share of the Portfolio's allocated expenses.
+     Commencement of operations.
@     Aggregate total investment return.
@@    Amount is less than $(.01) per share.
@@@   Based on average shares outstanding.

      See Notes to Financial Statements.


12      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Financial Highlights (continued)             Merrill Lynch Large Cap Growth Fund



                                                                                           Class C
The following per share data and ratios have been       ----------------------------------------------------------------------------
derived from information provided in the financial       For the Six                                                  For the Period
statements.                                             Months Ended            For the Year Ended October 31,        Dec. 22, 1999+
                                                          April 30,        -----------------------------------------  to October 31,
Increase (Decrease) in Net Asset Value:                     2004             2003            2002           2001           2000
====================================================================================================================================
Per Share Operating Performance
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                          
                   Net asset value, beginning of period   $   7.65         $   6.25        $   7.36       $  11.25       $  10.00
                                                          --------------------------------------------------------------------------
                   Investment loss--net ...............       (.06)@@@         (.10)@@@        (.12)@@@       (.14)@@@       (.01)
                   Realized and unrealized gain (loss)
                    on investments allocated from the
                    Portfolio--net ....................        .14             1.50            (.99)         (3.75)          1.26
                                                          --------------------------------------------------------------------------
                   Total from investment operations ...        .08             1.40           (1.11)         (3.89)          1.25
                                                          --------------------------------------------------------------------------
                   Less distributions in excess of
                    realized gain on investments
                    allocated from the Portfolio--net .         --               --              --             --@@           --
                                                          --------------------------------------------------------------------------
                   Net asset value, end of period .....   $   7.73         $   7.65        $   6.25       $   7.36       $  11.25
                                                          ==========================================================================
====================================================================================================================================
Total Investment Return**
- ------------------------------------------------------------------------------------------------------------------------------------
                   Based on net asset value per share .       1.05%@          22.40%         (15.08%)       (34.56%)        12.50%@
                                                          ==========================================================================
====================================================================================================================================
Ratios to Average Net Assets
- ------------------------------------------------------------------------------------------------------------------------------------
                   Expenses, net of reimbursement*** ..       2.14%*           2.27%           2.33%          2.17%          2.56%*
                                                          ==========================================================================
                   Expenses*** ........................       2.14%*           2.27%           2.35%          2.17%          4.16%*
                                                          ==========================================================================
                   Investment loss--net ...............      (1.52%)*         (1.62%)         (1.67%)        (1.68%)        (1.83%)*
                                                          ==========================================================================
====================================================================================================================================
Supplemental Data
- ------------------------------------------------------------------------------------------------------------------------------------
                   Net assets, end of period
                    (in thousands) ....................   $ 81,984         $ 68,337        $ 52,872       $ 39,167       $ 23,736
                                                          ==========================================================================
                   Portfolio turnover of Master Large
                    Cap Growth Portfolio ..............      64.77%          178.11%         177.46%        230.34%         94.75%
                                                          ==========================================================================


*     Annualized.
**    Total investment returns exclude the effects of sales charges.
***   Includes the Fund's share of the Portfolio's allocated expenses.
+     Commencement of operations.
@     Aggregate total investment return.
@@    Amount is less than $(.01) per share.
@@@   Based on average shares outstanding.

      See Notes to Financial Statements.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        13


[LOGO] Merrill Lynch Investment Managers

Financial Highlights (continued)             Merrill Lynch Large Cap Growth Fund



                                                                                           Class I
The following per share data and ratios have been       ----------------------------------------------------------------------------
derived from information provided in the financial       For the Six                                                  For the Period
statements.                                             Months Ended           For the Year Ended October 31,++       Dec. 22, 1999+
                                                          April 30,        -----------------------------------------  to October 31,
Increase (Decrease) in Net Asset Value:                     2004             2003            2002           2001           2000++
====================================================================================================================================
Per Share Operating Performance
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                          
                   Net asset value, beginning of period   $   7.97         $   6.44        $   7.50       $  11.35       $  10.00
                                                          --------------------------------------------------------------------------
                   Investment loss--net ...............       (.02)@@          (.04)@@         (.05)@@        (.06)@@        (.02)
                   Realized and unrealized gain (loss)
                    on investments allocated from the
                    Portfolio--net ....................        .14             1.57           (1.01)         (3.78)          1.37
                                                          --------------------------------------------------------------------------
                   Total from investment operations ...        .12             1.53           (1.06)         (3.84)          1.35
                                                          --------------------------------------------------------------------------
                   Less distributions in excess of
                    realized gain on investments
                    allocated from the Portfolio--net .         --               --              --           (.01)            --
                                                          --------------------------------------------------------------------------
                   Net asset value, end of period .....   $   8.09         $   7.97        $   6.44       $   7.50       $  11.35
                                                          ==========================================================================
====================================================================================================================================
Total Investment Return**
- ------------------------------------------------------------------------------------------------------------------------------------
                   Based on net asset value per share .       1.51%@          23.76%         (14.13%)       (33.89%)        13.50%@
                                                          ==========================================================================
====================================================================================================================================
Ratios to Average Net Assets
- ------------------------------------------------------------------------------------------------------------------------------------
                   Expenses, net of reimbursement*** ..       1.11%*           1.22%           1.29%          1.14%          1.38%*
                                                          ==========================================================================
                   Expenses*** ........................       1.11%*           1.22%           1.31%          1.14%          4.77%*
                                                          ==========================================================================
                   Investment loss--net ...............       (.49%)*          (.57%)          (.63%)         (.65%)        (1.04%)*
                                                          ==========================================================================
====================================================================================================================================
Supplemental Data
- ------------------------------------------------------------------------------------------------------------------------------------
                   Net assets, end of period
                    (in thousands) ....................   $ 68,838         $ 53,163        $ 31,989       $ 23,112       $ 18,859
                                                          ==========================================================================
                   Portfolio turnover of Master Large
                    Cap Growth Portfolio ..............      64.77%          178.11%         177.46%        230.34%         94.75%
                                                          ==========================================================================


*     Annualized.
**    Total investment returns exclude the effects of sales charges.
***   Includes the Fund's share of the Portfolio's allocated expenses.
+     Commencement of operations.
++    Effective April 14, 2003, Class A Shares were redesignated Class I Shares.
@     Aggregate total investment return.
@@    Based on average shares outstanding.

      See Notes to Financial Statements.


14      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Financial Highlights (concluded)             Merrill Lynch Large Cap Growth Fund



                                                                                               Class R
                                                                                   ---------------------------------
                                                                                                      For the Period
The following per share data and ratios have been derived                          For the Six          January 3,
from information provided in the financial statements.                             Months Ended          2003+ to
                                                                                     April 30,          October 31,
Increase (Decrease) in Net Asset Value:                                                2004                2003
====================================================================================================================
Per Share Operating Performance
- --------------------------------------------------------------------------------------------------------------------
                                                                                                   
                   Net asset value, beginning of period .....................        $    7.74           $    6.16
                                                                                     -------------------------------
                   Investment loss--net@@ ...................................             (.02)               (.05)
                   Realized and unrealized gain on investments allocated from
                    the Portfolio--net ......................................              .12                1.63
                                                                                     -------------------------------
                   Total from investment operations .........................              .10                1.58
                                                                                     -------------------------------
                   Net asset value, end of period ...........................        $    7.84           $    7.74
                                                                                     ===============================
====================================================================================================================
Total Investment Return++
- --------------------------------------------------------------------------------------------------------------------
                   Based on net asset value per share .......................             1.29%@             25.65%@
                                                                                     ===============================
====================================================================================================================
Ratios to Average Net Assets
- --------------------------------------------------------------------------------------------------------------------
                   Expenses, net of reimbursement** .........................             1.53%*              1.72%*
                                                                                     ===============================
                   Expenses** ...............................................             1.53%*              1.72%*
                                                                                     ===============================
                   Investment loss--net .....................................             (.90%)*             (.94%)*
                                                                                     ===============================
====================================================================================================================
Supplemental Data
- --------------------------------------------------------------------------------------------------------------------
                   Net assets, end of period (in thousands) .................        $   4,128           $     290
                                                                                     ===============================
                   Portfolio turnover of Master Large Cap Growth Portfolio ..            64.77%             178.11%
                                                                                     ===============================


*     Annualized.
**    Includes the Fund's share of the Portfolio's allocated expenses.
+     Commencement of operations.
++    Total investment returns exclude the effects of sales charges.
@     Aggregate total investment return.
@@    Based on average shares outstanding.

      See Notes to Financial Statements.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        15


[LOGO] Merrill Lynch Investment Managers

Notes to Financial Statements                Merrill Lynch Large Cap Growth Fund

1. Significant Accounting Policies:

Merrill Lynch Large Cap Growth Fund of Merrill Lynch Large Cap Series Funds,
Inc. (the "Fund") is registered under the Investment Company Act of 1940, as
amended, as a diversified mutual fund. The Fund seeks to achieve its investment
objective by investing all of its assets in the Master Large Cap Growth
Portfolio (the "Portfolio"), which is a portfolio of Master Large Cap Series
Trust that has 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. The performance of the Fund is directly
affected by the performance of the Portfolio. The financial statements of the
Portfolio, including the Schedule of Investments, are included elsewhere in this
report and should be read in conjunction with the Fund's financial statements.
The Fund's financial statements are prepared in conformity with accounting
principles generally accepted in the United States of America, which may require
the use of management accruals and estimates. Actual results may differ from
these estimates. These unaudited financial statements reflect all adjustments,
which are, in the opinion of management, necessary to a fair statement of the
results for the interim period presented. All such adjustments are of a normal,
recurring nature. The percentage of the Portfolio owned by the Fund at April 30,
2004 was 100%. The Fund offers multiple classes of shares. Shares of Class A and
Class I are sold with a front-end sales charge. Shares of Class B and Class C
may be subject to a contingent deferred sales charge. Class R Shares are sold
only to certain retirement plans. All classes of shares have identical voting,
dividend, liquidation and other rights and the same terms and conditions, except
that Class A, Class B, Class C and Class R Shares bear certain expenses related
to the account maintenance of such shares, and Class B, Class C and Class R
Shares also bear certain expenses related to the distribution of such shares.
Each class has exclusive voting rights with respect to matters relating to its
account maintenance and distribution expenditures. Income, expenses (other than
expenses attributable to a specific class) and realized and unrealized gains and
losses on investments (and foreign currency transactions) are allocated daily to
each class based on its relative net assets. The following is a summary of
significant accounting policies followed by the Fund.

(a) Valuation of investments -- The Fund records its investment in the Portfolio
at fair value. Valuation of securities held by the Portfolio is discussed in
Note 1a of the Portfolio's Notes to Financial Statements, which are included
elsewhere in this report.

(b) Investment income and expenses -- The Fund records daily its proportionate
share of the Portfolio's income, expenses and realized and unrealized gains and
losses. In addition, the Fund accrues its own expenses.

(c) Income taxes -- It is the Fund's policy to comply with the requirements of
the Internal Revenue Code applicable to regulated investment companies and to
distribute substantially all of its taxable income to shareholders. Therefore,
no Federal income tax provision is required. Under the applicable foreign tax
law, a withholding tax may be imposed on interest, dividends and capital gains
at various rates.

(d) Prepaid registration fees -- Prepaid registration fees are charged to
expenses as the related shares are issued.

(e) Dividends and distributions -- Dividends and distributions paid by the Fund
are recorded on the ex-dividend dates.

(f) Investment transactions -- Investment transactions in the Portfolio are
accounted for on a trade date basis.

2. Transactions with Affiliates:

The Fund has entered into an Administration Agreement with Fund Asset
Management, L.P. ("FAM"). The general partner of FAM is Princeton Services, Inc.
("PSI"), an indirect, wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML
& Co."), which is the limited partner. The Fund pays a monthly fee at an annual
rate of .25% of the Fund's average daily net assets for the performance of
administrative services (other than investment advice and related portfolio
activities) necessary for the operation of the Fund.

The Fund has entered into a Distribution Agreement and Distribution Plans with
FAM Distributors, Inc. ("FAMD" or the "Distributor"), which is a wholly-owned
subsidiary of Merrill Lynch Group, Inc. Pursuant to the Distribution Plans
adopted by the Fund in accordance with Rule 12b-1 under the Investment Company
Act of 1940, the Fund pays the Distributor ongoing account maintenance and
distribution fees. The fees are accrued daily and paid monthly at annual rates
based upon the average daily net assets of the shares as follows:

- --------------------------------------------------------------------------------
                                                      Account       Distribution
                                                  Maintenance Fee       Fee
- --------------------------------------------------------------------------------
Class A .............................                  .25%              --
Class B .............................                  .25%             .75%
Class C .............................                  .25%             .75%
Class R .............................                  .25%             .25%
- --------------------------------------------------------------------------------


16      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Notes to Financial Statements (continued)    Merrill Lynch Large Cap Growth Fund

Pursuant to a sub-agreement with the Distributor, Merrill Lynch, Pierce, Fenner
& Smith Incorporated ("MLPF&S"), a subsidiary of ML & Co., also provides account
maintenance and distribution services to the Fund. The ongoing account
maintenance fee compensates the Distributor and MLPF&S for providing account
maintenance services to Class A, Class B, Class C and Class R shareholders. The
ongoing distribution fee compensates the Distributor and MLPF&S for providing
shareholder and distribution-related services to Class B, Class C and Class R
shareholders.

For the six months ended April 30, 2004, FAMD earned underwriting discounts and
MLPF&S earned dealer concessions on sales of the Fund's Class A and Class I
Shares as follows:

- --------------------------------------------------------------------------------
                                                     FAMD                 MLPF&S
- --------------------------------------------------------------------------------
Class A ............................               $ 4,136               $50,391
Class I ............................               $     9               $   155
- --------------------------------------------------------------------------------

For the six months ended April 30, 2004, MLPF&S received contingent deferred
sales charges of $91,737 and $3,694 relating to transactions in Class B and
Class C Shares of the Fund, respectively.

Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of ML & Co., is
the Fund's transfer agent.

Certain officers and/or directors of the Fund are officers and/or directors of
FAM, PSI, FAMD, FDS, and/or ML & Co.

3. Capital Share Transactions:

Net increase in net assets derived from capital share transactions was
$41,841,275 and $20,027,496 for the six months ended April 30, 2004 and the year
ended October 31, 2003, respectively.

Transactions in capital shares for each class were as follows:

- -------------------------------------------------------------------------------
Class A Shares for the Six                                             Dollar
Months Ended April 30, 2004                       Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................           1,685,284         $ 14,152,534
Automatic conversion of shares .......               3,345               27,569
                                              ---------------------------------
Total issued .........................           1,688,629           14,180,103
Shares redeemed ......................            (472,094)          (3,886,599)
                                              ---------------------------------
Net increase .........................           1,216,535         $ 10,293,504
                                              =================================

- -------------------------------------------------------------------------------
Class A Shares for the Year                                            Dollar
Ended October 31, 2003                            Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................           2,096,948         $ 13,866,353
Shares issued resulting from
  reorganization .....................              24,369              150,353
Automatic conversion of shares .......              10,886               71,282
                                              ---------------------------------
Total issued .........................           2,132,203           14,087,988
Shares redeemed ......................          (1,142,207)          (7,444,225)
                                              ---------------------------------
Net increase .........................             989,996         $  6,643,763
                                              =================================

- -------------------------------------------------------------------------------
Class B Shares for the Six                                             Dollar
Months Ended April 30, 2004                       Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................           1,360,670         $ 10,952,784
Automatic conversion of shares .......              (3,449)             (27,569)
Shares redeemed ......................          (1,535,479)         (12,335,449)
                                              ---------------------------------
Net decrease .........................            (178,258)        $ (1,410,234)
                                              =================================

- -------------------------------------------------------------------------------
Class B Shares for the Year                                            Dollar
Ended October 31, 2003                            Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................           3,207,289         $ 20,273,249
Shares issued resulting from
  reorganization .....................             124,168              747,186
                                              ---------------------------------
Total issued .........................           3,331,457           21,020,435
Automatic conversion of shares .......             (11,157)             (71,282)
Shares redeemed ......................          (3,566,576)         (22,576,872)
                                              ---------------------------------
Net decrease .........................            (246,276)        $ (1,627,719)
                                              =================================

- -------------------------------------------------------------------------------
Class C Shares for the Six                                             Dollar
Months Ended April 30, 2004                       Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................           2,730,029         $ 21,888,119
Shares redeemed ......................          (1,051,823)          (8,408,407)
                                              ---------------------------------
Net increase .........................           1,678,206         $ 13,479,712
                                              =================================

- -------------------------------------------------------------------------------
Class C Shares for the Year                                            Dollar
Ended October 31, 2003                            Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................           3,303,721         $ 21,025,257
Shares issued resulting from
  reorganization .....................               8,965               53,892
                                              ---------------------------------
Total issued .........................           3,312,686           21,079,149
Shares redeemed ......................          (2,846,850)         (17,916,272)
                                              ---------------------------------
Net increase .........................             465,836         $  3,162,877
                                              =================================

- -------------------------------------------------------------------------------
Class I Shares for the Six                                             Dollar
Months Ended April 30, 2004                       Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................           3,286,996         $ 27,622,792
Shares redeemed ......................          (1,448,212)         (12,188,749)
                                              ---------------------------------
Net increase .........................           1,838,784         $ 15,434,043
                                              =================================


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        17


[LOGO] Merrill Lynch Investment Managers

Notes to Financial Statements (concluded)    Merrill Lynch Large Cap Growth Fund

- -------------------------------------------------------------------------------
Class I Shares for the Year                                            Dollar
Ended October 31, 2003                            Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................           3,746,535         $ 25,089,884
Shares issued resulting from
  reorganization .....................                  15                   91
                                              ---------------------------------
Total issued .........................           3,746,550           25,089,975
Shares redeemed ......................          (2,044,660)         (13,509,957)
                                              ---------------------------------
Net increase .........................           1,701,890         $ 11,580,018
                                              =================================

- -------------------------------------------------------------------------------
Class R Shares for the Six                                             Dollar
Months Ended April 30, 2004                       Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................             546,234         $  4,511,633
Shares redeemed ......................             (57,285)            (467,383)
                                              ---------------------------------
Net increase .........................             488,949         $  4,044,250
                                              =================================

- -------------------------------------------------------------------------------
Class R Shares for the Period
January 3, 2003+ to                                                    Dollar
October 31, 2003                                  Shares               Amount
- -------------------------------------------------------------------------------
Shares sold ..........................              38,716         $    277,457
Shares redeemed ......................              (1,247)              (8,900)
                                              ---------------------------------
Net increase .........................              37,469         $    268,557
                                              =================================
+     Commencement of operations.

5. Capital Loss Carryforward:

On October 31, 2003, the Fund had a net capital loss carryforward of
$106,177,155, of which $10,449,992 expires in 2007, $2,792,851 expires in 2008,
$52,484,238 expires in 2009 and $40,450,074 expires in 2010. This amount will be
available to offset like amounts of any future taxable gains.


18      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Schedule of Investments                        Master Large Cap Growth Portfolio



                                                                                                             Value        Percent of
Sector         Industry*                       Shares Held   Common Stocks                             (in U.S. dollars)  Net Assets
====================================================================================================================================
                                                                                                              
Consumer       Auto Components                      72,000   Autoliv, Inc.                                $ 3,062,160         1.0%
Discretionary  ---------------------------------------------------------------------------------------------------------------------
               Hotels, Restaurants & Leisure        44,000   Applebee's International, Inc.                 1,706,320         0.6
                                                    82,000   International Game Technology                  3,094,680         1.1
                                                    54,000   Mandalay Resort Group                          3,102,300         1.1
                                                    67,000   Station Casinos, Inc.                          3,020,360         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Household Durables                   65,000   Centex Corporation                             3,116,750         1.1
                                                   104,000   D.R. Horton, Inc.                              2,995,200         1.0
                                                    43,000   Harman International Industries,
                                                             Incorporated                                   3,261,550         1.1
                                                    68,000  +Hovnanian Enterprises, Inc. (Class A)          2,445,960         0.8
                                                    63,000   Lennar Corporation (Class A)                   2,951,550         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Media                                53,000  +Getty Images, Inc.                             2,893,800         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Specialty Retail                    100,000  +Barnes & Noble, Inc.                           2,987,000         1.0
                                                   131,000   Borders Group, Inc.                            3,140,070         1.1
                                                    77,000  +Chico's FAS, Inc.                              3,136,210         1.1
                                                   148,000   Claire's Stores, Inc.                          3,016,240         1.0
                                                   108,000   Foot Locker, Inc.                              2,592,000         0.9
                                                   179,000   The Gap, Inc.                                  3,939,790         1.3
                                                    65,000   Michael's Stores, Inc.                         3,251,950         1.1
                                                    69,000   Regis Corporation                              2,995,980         1.0
                                                   152,000   The TJX Companies, Inc.                        3,734,640         1.3
               ---------------------------------------------------------------------------------------------------------------------
               Textiles, Apparel & Luxury Goods     80,000  +Coach, Inc.                                    3,408,000         1.2
               ---------------------------------------------------------------------------------------------------------------------
                                                             Total Consumer Discretionary                  63,852,510        21.8
====================================================================================================================================
Consumer       Food & Staples Retailing            561,000  +Rite Aid Corporation                           2,748,900         0.9
Staples                                             43,000   Wal-Mart Stores, Inc.                          2,451,000         0.8
               ---------------------------------------------------------------------------------------------------------------------
               Food Products                        52,000   Kellogg Company                                2,230,800         0.8
               ---------------------------------------------------------------------------------------------------------------------
               Household Products                   64,000  +Energizer Holdings, Inc.                       2,771,200         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Tobacco                              80,000   Altria Group, Inc.                             4,430,400         1.5
               ---------------------------------------------------------------------------------------------------------------------
                                                             Total Consumer Staples                        14,632,300         5.0
====================================================================================================================================
Financials     Capital Markets                     263,000  +E* TRADE Group, Inc.                           2,987,680         1.0
                                                    21,000   Legg Mason, Inc.                               1,933,260         0.7
                                                    41,000   Lehman Brothers Holdings, Inc.                 3,009,400         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Commercial Banks                     50,000   Commerce Bancorp, Inc.                         2,850,500         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Consumer Finance                    144,000   MBNA Corporation                               3,510,720         1.2
               ---------------------------------------------------------------------------------------------------------------------
               Insurance                            40,000   Berkley (W.R.) Corporation                     1,620,000         0.5
                                                    77,000   Fidelity National Financial, Inc.              2,818,200         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Thrifts & Mortgage Finance          126,000   New York Community Bancorp, Inc.               3,158,820         1.1
               ---------------------------------------------------------------------------------------------------------------------
                                                             Total Financials                              21,888,580         7.5
====================================================================================================================================
Health Care    Biotechnology                        72,000  +Charles River Laboratories
                                                             International, Inc.                            3,312,000         1.1
                                                    36,000  +Genentech, Inc.                                4,420,800         1.5
                                                    55,000  +IDEXX Laboratories, Inc.                       3,369,300         1.2
                                                    44,000  +Invitrogen Corporation                         3,178,120         1.1
               ---------------------------------------------------------------------------------------------------------------------
               Health Care Equipment & Supplies     46,000   Bausch & Lomb Incorporated                     2,890,180         1.0
                                                    72,000   Becton, Dickinson and Company                  3,639,600         1.2
                                                    58,000  +Respironics, Inc.                              3,039,780         1.0
                                                    50,000  +Zimmer Holdings, Inc.                          3,992,500         1.4
               ---------------------------------------------------------------------------------------------------------------------
               Health Care Providers & Services     36,000   Aetna Inc. (New Shares)                        2,979,000         1.0
                                                    62,000  +DaVita, Inc.                                   3,168,200         1.1
                                                    65,000   Omnicare, Inc.                                 2,696,200         0.9
                                                    59,000   Oxford Health Plans, Inc.                      3,211,960         1.1
               ---------------------------------------------------------------------------------------------------------------------
               Pharmaceuticals                      53,000   Johnson & Johnson                              2,863,590         1.0
                                                   186,000  +King Pharmaceuticals, Inc.                     3,208,500         1.1
                                                   304,000   Pfizer, Inc.                                  10,871,040         3.7
               ---------------------------------------------------------------------------------------------------------------------
                                                             Total Health Care                             56,840,770        19.4
               =====================================================================================================================



        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        19


[LOGO] Merrill Lynch Investment Managers

Schedule of Investments (continued)            Master Large Cap Growth Portfolio



                                                                                                             Value        Percent of
Sector         Industry*                       Shares Held   Common Stocks                             (in U.S. dollars)  Net Assets
====================================================================================================================================
                                                                                                              
Industrials    Commercial Services & Supplies       15,000  +Apollo Group, Inc. (Class A)                 $ 1,363,200         0.5%
                                                    48,000  +Career Education Corporation                   3,072,000         1.1
                                                   138,000   Cendant Corporation                            3,267,840         1.1
                                                    67,000   H&R Block, Inc.                                3,022,370         1.0
                                                    35,000  +University of Phoenix Online                   3,047,100         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Industrial Conglomerates            363,000   General Electric Company                      10,871,850         3.7
               ---------------------------------------------------------------------------------------------------------------------
                                                             Total Industrials                             24,644,360         8.4
====================================================================================================================================
Information    Communications Equipment            437,000  +Cisco Systems, Inc.                            9,120,190         3.1
Technology                                         292,000  +Corning Incorporated                           3,220,760         1.1
                                                   139,000  +Foundry Networks, Inc.                         1,570,700         0.5
                                                   144,000  +Juniper Networks, Inc.                         3,150,720         1.1
                                                   212,000   Motorola, Inc.                                 3,869,000         1.3
                                                    89,000   QUALCOMM Incorporated                          5,558,940         1.9
               ---------------------------------------------------------------------------------------------------------------------
               Computers & Peripherals               9,000  +Lexmark International Group, Inc.
                                                             (Class A)                                        814,140         0.3
                                                   101,000  +SanDisk Corporation                            2,334,110         0.8
               ---------------------------------------------------------------------------------------------------------------------
               Electronic Equipment &              119,000  +Arrow Electronics, Inc.                        3,008,320         1.0
               Instruments                         112,000  +Jabil Circuit, Inc.                            2,955,680         1.0
                                                   137,000   PerkinElmer, Inc.                              2,637,250         0.9
                                                   223,000  +Sanmina--SCI Corporation                       2,234,460         0.8
                                                    57,000  +Thermo Electron Corporation                    1,664,400         0.6
                                                    76,000  +Waters Corporation                             3,279,400         1.1
               ---------------------------------------------------------------------------------------------------------------------
               Information Technology Services      68,000  +Cognizant Technology Solutions
                                                             Corporation                                    2,941,680         1.0
               ---------------------------------------------------------------------------------------------------------------------
               Internet Software & Services         86,000  +Yahoo! Inc.                                    4,339,560         1.5
               ---------------------------------------------------------------------------------------------------------------------
               Office Electronics                  242,000  +Xerox Corporation                              3,250,060         1.1
               ---------------------------------------------------------------------------------------------------------------------
               Semiconductors &                    210,000  +Advanced Micro Devices, Inc.                   2,986,200         1.0
               Semiconductor Equipment             197,000  +Amkor Technology, Inc.                         1,591,760         0.5
                                                   497,000  +Atmel Corporation                              2,902,480         1.0
                                                   143,000  +Cypress Semiconductor Corporation              1,997,710         0.7
                                                   148,000  +Fairchild Semiconductor Corporation            2,881,560         1.0
                                                   140,000   Intel Corporation                              3,602,200         1.2
                                                   258,000  +LSI Logic Corporation                          1,919,520         0.7
                                                    57,000  +Silicon Laboratories Inc.                      2,687,550         0.9
                                                    36,000   Texas Instruments Incorporated                   903,600         0.3
               ---------------------------------------------------------------------------------------------------------------------
               Software                             91,000   Autodesk, Inc.                                 3,048,500         1.0
                                                   274,000   Microsoft Corporation                          7,115,780         2.4
                                                   286,000  +Novell, Inc.                                   2,757,040         1.0
                                                   137,000  +Red Hat, Inc.                                  3,111,270         1.1
                                                    80,000  +Symantec Corporation                           3,604,000         1.2
               ---------------------------------------------------------------------------------------------------------------------
                                                             Total Information Technology                  97,058,540        33.1
====================================================================================================================================
Materials      Chemicals                            76,000   E.I. du Pont de Nemours and Company            3,264,200         1.1
               ---------------------------------------------------------------------------------------------------------------------
               Construction Materials               13,000   Florida Rock Industries, Inc.                    517,270         0.2
               ---------------------------------------------------------------------------------------------------------------------
               Containers & Packaging               47,000   Ball Corporation                               3,102,000         1.1
               ---------------------------------------------------------------------------------------------------------------------
               Metals & Mining                      47,000  +Phelps Dodge Corporation                       3,094,010         1.0
               ---------------------------------------------------------------------------------------------------------------------
                                                             Total Materials                                9,977,480         3.4
====================================================================================================================================
Telecom-       Wireless Telecommunication          163,000  +Nextel Communications, Inc. (Class A)          3,889,180         1.3
munication     Services
Services       ---------------------------------------------------------------------------------------------------------------------
                                                             Total Telecommunication Services               3,889,180         1.3
               =====================================================================================================================
                                                             Total Common Stocks (Cost--$266,881,974)     292,783,720        99.9
====================================================================================================================================



20      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Schedule of Investments (concluded)            Master Large Cap Growth Portfolio



                                   Beneficial Interest/                                                      Value        Percent of
                                            Shares Held   Short-Term Securities                        (in U.S. dollars)  Net Assets
               =====================================================================================================================
                                                                                                                
                                            $ 1,081,880   Merrill Lynch Liquidity Series, LLC Cash
                                                          Sweep Series I (a)                             $  1,081,880         0.4%
                                            $29,000,813   Merrill Lynch Liquidity Series, LLC Money
                                                          Market Series (a)(b)                             29,000,813         9.9
                                              9,666,937   Merrill Lynch Premier Institutional
                                                          Fund (a)(b)                                       9,666,937         3.3
               ---------------------------------------------------------------------------------------------------------------------
                                                          Total Short-Term Securities
                                                          (Cost--$39,749,630)                              39,749,630        13.6
               =====================================================================================================================
               Total Investments (Cost--$306,631,604)                                                     332,533,350       113.5

               Liabilities in Excess of Other Assets                                                      (39,438,545)      (13.5)
                                                                                                         ---------------------------
               Net Assets                                                                                $293,094,805       100.0%
                                                                                                         ===========================


+     Non-income producing security.
*     For Fund compliance purposes, "Industry" means any one or more of the
      industry sub-classifications used by one or more widely recognized market
      indexes or ratings group indexes, and/or as defined by Fund management.
      This definition may not apply for purposes of this report, which may
      combine such industry sub-classifications for reporting ease.
(a)   Investments in companies considered to be an affiliate of the Fund (such
      companies are defined as "Affiliated Companies" in Section 2(a)(3) of the
      Investment Company Act of 1940) are as follows:

      --------------------------------------------------------------------------
                                                                  Interest/
                                                    Net           Dividend
      Affiliate                                  Activity          Income
      --------------------------------------------------------------------------
      Merrill Lynch Liquidity Series, LLC
        Cash Sweep Series I                      $ 618,019         $ 4,393

      Merrill Lynch Liquidity Series, LLC
        Money Market Series                     $8,036,250         $ 2,893

      Merrill Lynch Premier
        Institutional Fund                       2,675,752         $10,243
      --------------------------------------------------------------------------

(b)   Security was purchased with the cash proceeds from securities loaned.

      See Notes to Financial Statements.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        21


[LOGO] Merrill Lynch Investment Managers

Statement of Assets and Liabilities            Master Large Cap Growth Portfolio


As of April 30, 2004
========================================================================================================================
Assets
- ------------------------------------------------------------------------------------------------------------------------
                                                                                                     
                   Investments in unaffiliated securities, at value (including
                    securities loaned of $37,088,095) (identified cost--$266,881,974)                      $ 292,783,720
                   Investments in affiliated securities, at value (identified
                    cost--$39,749,630) ..............................................                         39,749,630
                   Cash .............................................................                            128,453
                   Receivables:
                      Securities sold ...............................................    $   1,319,473
                      Contributions .................................................        1,176,388
                      Dividends .....................................................           59,303
                      Securities lending--net .......................................            4,647
                      Interest from affiliates ......................................            1,570         2,561,381
                                                                                         -------------
                   Prepaid expenses .................................................                              1,701
                                                                                                           -------------
                   Total assets .....................................................                        335,224,885
                                                                                                           -------------
========================================================================================================================
Liabilities
- ------------------------------------------------------------------------------------------------------------------------
                   Collateral on securities loaned, at value ........................                         38,667,750
                   Payables:
                      Securities purchased ..........................................        2,514,610
                      Withdrawals ...................................................          790,455
                      Investment adviser ............................................          145,443
                      Other affiliates ..............................................            1,933         3,452,441
                                                                                         -------------
                   Accrued expenses and other liabilities ...........................                              9,889
                                                                                                           -------------
                   Total liabilities ................................................                         42,130,080
                                                                                                           -------------
========================================================================================================================
Net Assets
- ------------------------------------------------------------------------------------------------------------------------
                   Net assets .......................................................                      $ 293,094,805
                                                                                                           =============
========================================================================================================================
Net Assets Consist of
- ------------------------------------------------------------------------------------------------------------------------
                   Investors' capital ...............................................                      $ 267,193,059
                   Unrealized appreciation on investments--net ......................                         25,901,746
                                                                                                           -------------
                   Net Assets .......................................................                      $ 293,094,805
                                                                                                           =============


      See Notes to Financial Statements.


22      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Statement of Operations                        Master Large Cap Growth Portfolio


For the Six Months Ended April 30, 2004
========================================================================================================================
Investment Income
- ------------------------------------------------------------------------------------------------------------------------
                                                                                                     
                   Dividends (net of $810 foreign withholding tax) ..................                      $     854,340
                   Securities lending--net ..........................................                             13,136
                   Interest from affiliates .........................................                              4,393
                                                                                                           -------------
                   Total income .....................................................                            871,869
                                                                                                           -------------
========================================================================================================================
Expenses
- ------------------------------------------------------------------------------------------------------------------------
                   Investment advisory fees .........................................    $     695,541
                   Accounting services ..............................................           66,333
                   Professional fees ................................................           21,417
                   Custodian fees ...................................................           17,545
                   Trustees' fees and expenses ......................................            8,907
                   Pricing fees .....................................................              487
                   Printing and shareholder reports .................................              129
                   Other ............................................................            4,392
                                                                                         -------------
                   Total expenses ...................................................                            814,751
                                                                                                           -------------
                   Investment income--net ...........................................                             57,118
                                                                                                           -------------
========================================================================================================================
Realized & Unrealized Gain (Loss) on Investments--Net
- ------------------------------------------------------------------------------------------------------------------------
                   Realized gain on investments--net ................................                         16,932,671
                   Change in unrealized appreciation on investments--net ............                        (14,229,911)
                                                                                                           -------------
                   Total realized and unrealized gain on investments--net ...........                          2,702,760
                                                                                                           -------------
                   Net Increase in Net Assets Resulting from Operations .............                      $   2,759,878
                                                                                                           =============


      See Notes to Financial Statements.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        23


[LOGO] Merrill Lynch Investment Managers


Statements of Changes in Net Assets            Master Large Cap Growth Portfolio



                                                                                         For the Six          For the
                                                                                         Months Ended       Year Ended
                                                                                           April 30,        October 31,
Increase (Decrease) in Net Assets:                                                           2004              2003
========================================================================================================================
Operations
- ------------------------------------------------------------------------------------------------------------------------
                                                                                                     
                   Investment income--net ...........................................    $      57,118     $      79,856
                   Realized gain on investments--net ................................       16,932,671        10,011,741
                   Change in unrealized appreciation on investments--net ............      (14,229,911)       38,033,118
                                                                                         -------------------------------
                   Net increase in net assets resulting from operations .............        2,759,878        48,124,715
                                                                                         -------------------------------
========================================================================================================================
Capital Transactions
- ------------------------------------------------------------------------------------------------------------------------
                   Proceeds from contributions ......................................       79,127,862        80,542,171
                   Fair value of withdrawals ........................................      (38,958,669)      (64,177,253)
                                                                                         -------------------------------
                   Net increase in net assets derived from capital transactions .....       40,169,193        16,364,918
                                                                                         -------------------------------
========================================================================================================================
Net Assets
- ------------------------------------------------------------------------------------------------------------------------
                   Total increase in net assets .....................................       42,929,071        64,489,633
                   Beginning of period ..............................................      250,165,734       185,676,101
                                                                                         -------------------------------
                   End of period ....................................................    $ 293,094,805     $ 250,165,734
                                                                                         ===============================


      See Notes to Financial Statements.


24      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Financial Highlights                           Master Large Cap Growth Portfolio



                                                             For the Six                                            For the Period
                                                             Months Ended       For the Year Ended October 31,    December 22, 1999+
The following ratios have been derived from                    April 30,    ------------------------------------    to October 31,
information provided in the financial statements.                2004          2003         2002          2001          2000
====================================================================================================================================
Total Investment Return**
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                      
                   Total investment return ................        1.77%@       25.01%      (13.56%)          --            --
                                                              ======================================================================
====================================================================================================================================
Ratios to Average Net Assets
- ------------------------------------------------------------------------------------------------------------------------------------
                   Expenses, net of reimbursement .........         .58%*         .61%         .67%          .73%         1.30%*
                                                              ======================================================================
                   Expenses ...............................         .58%*         .61%         .67%          .73%         1.82%*
                                                              ======================================================================
                   Investment income (loss)--net ..........         .04%*         .04%        (.01%)        (.24%)        (.75%)*
                                                              ======================================================================
====================================================================================================================================
Supplemental Data
- ------------------------------------------------------------------------------------------------------------------------------------
                   Net assets, end of period (in thousands)   $ 293,095     $ 250,166    $ 185,676     $ 148,652     $  98,125
                                                              ======================================================================
                   Portfolio turnover .....................       64.77%       178.11%      177.46%       230.34%        94.75%
                                                              ======================================================================


*     Annualized.
**    Total investment return is required to be disclosed for fiscal years
      beginning after December 15, 2000.
+     Commencement of operations.
@     Aggregate total investment return.

      See Notes to Financial Statements.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        25


[LOGO] Merrill Lynch Investment Managers

Notes to Financial Statements                  Master Large Cap Growth Portfolio

1. Significant Accounting Policies:

Master Large Cap Growth Portfolio (the "Portfolio") is part of Master Large Cap
Series Trust (the "Trust"). The Portfolio is registered under the Investment
Company Act of 1940, as amended, and is organized as a Delaware statutory trust.
The Declaration of Trust permits the Trustees to issue nontransferable interests
in the Portfolio, subject to certain limitations. The Portfolio's financial
statements are prepared in conformity with accounting principles generally
accepted in the United States of America, which may require the use of
management accruals and estimates. Actual results may differ from these
estimates. These unaudited financial statements reflect all adjustments, which
are, in the opinion of management, necessary to a fair statement of the results
for the interim period presented. All such adjustments are of a normal,
recurring nature. The following is a summary of significant accounting policies
followed by the Portfolio.

(a) Valuation of investments -- Equity securities that are held by the Portfolio
that are traded on stock exchanges or the Nasdaq National Market are valued at
the last sale price or official close price on the exchange, as of the close of
business on the day the securities are being valued or, lacking any sales, at
the last available bid price for long positions, and at the last available ask
price for short positions. In cases where equity securities are traded on more
than one exchange, the securities are valued on the exchange designated as the
primary market by or under the authority of the Board of Trustees of the
Portfolio. Long positions traded in the over-the-counter ("OTC") market, Nasdaq
Small Cap or Bulletin Board are valued at the last available bid price or yield
equivalent obtained from one or more dealers or pricing services approved by the
Board of Trustees of the Portfolio. Short positions traded in the OTC market are
valued at the last available ask price. Portfolio securities that are traded
both in the OTC market and on a stock exchange are valued according to the
broadest and most representative market.

Options written are valued at the last sale price in the case of exchange-traded
options or, in the case of options traded in the OTC market, the last ask price.
Options purchased are valued at their last sale price in the case of
exchange-traded options or, in the case of options traded in the OTC market, the
last bid price. Swap agreements are valued daily based upon quotations from
market makers. Financial futures contracts and options thereon, which are traded
on exchanges, are valued at their last sale price as of the close of such
exchanges. Obligations with remaining maturities of 60 days or less are valued
at amortized cost unless the Investment Adviser believes that this method no
longer produces fair valuations.

Repurchase agreements are valued at cost plus accrued interest. The Portfolio
employs pricing services to provide certain securities prices for the Portfolio.
Securities and assets for which market quotations are not readily available are
valued at fair value as determined in good faith by or under the direction of
the Board of Trustees of the Portfolio, including valuations furnished by the
pricing services retained by the Portfolio, which may use a matrix system for
valuations. The procedures of a pricing service and its valuations are reviewed
by the officers of the Portfolio under the general supervision of the
Portfolio's Board of Trustees. Such valuations and procedures will be reviewed
periodically by the Board of Trustees of the Portfolio.

Generally, trading in foreign securities, as well as U.S. government securities
and money market instruments, is substantially completed each day at various
times prior to the close of business on the New York Stock Exchange ("NYSE").
The values of such securities used in computing the net assets of the
Portfolio's shares are determined as of such times. Foreign currency exchange
rates also are generally determined prior to the close of business on the NYSE.
Occasionally, events affecting the values of such securities and such exchange
rates may occur between the times at which they are determined and the close of
business on the NYSE that may not be reflected in the computation of the
Portfolio's net assets. If events (for example, a company announcement, market
volatility or a natural disaster) occur during such periods that are expected to
materially affect the value of such securities, those securities may be valued
at their fair value as determined in good faith by the Portfolio's Board of
Trustees or by the Investment Adviser using a pricing service and/or procedures
approved by the Portfolio's Board of Trustees.


26      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Notes to Financial Statements (continued)      Master Large Cap Growth Portfolio

(b) Derivative financial instruments -- The Portfolio may engage in various
portfolio investment strategies both to increase the return of the Portfolio and
to hedge, or protect, its exposure to interest rate movements and movements in
the securities markets. Losses may arise due to changes in the value of the
contract or if the counterparty does not perform under the contract.

o     Financial futures contracts -- The Portfolio may purchase or sell
      financial futures contracts and options on such futures contracts. Futures
      contracts are contracts for delayed delivery of securities at a specific
      future date and at a specific price or yield. Upon entering into a
      contract, the Portfolio deposits and maintains as collateral such initial
      margin as required by the exchange on which the transaction is effected.
      Pursuant to the contract, the Portfolio agrees to receive from or pay to
      the broker an amount of cash equal to the daily fluctuation in value of
      the contract. Such receipts or payments are known as variation margin and
      are recorded by the Portfolio as unrealized gains or losses. When the
      contract is closed, the Portfolio records a realized gain or loss equal to
      the difference between the value of the contract at the time it was opened
      and the value at the time it was closed.

o     Options -- The Portfolio may purchase and write call and put options. When
      the Portfolio writes an option, an amount equal to the premium received by
      the Portfolio is reflected as an asset and an equivalent liability. The
      amount of the liability is subsequently marked to market to reflect the
      current market value of the option written. When a security is purchased
      or sold through an exercise of an option, the related premium paid (or
      received) is added to (or deducted from) the basis of the security
      acquired or deducted from (or added to) the proceeds of the security sold.
      When an option expires (or the Portfolio enters into a closing
      transaction), the Portfolio realizes a gain or loss on the option to the
      extent of the premiums received or paid (or a gain or loss to the extent
      that the cost of the closing transaction exceeds the premium paid or
      received).

      Written and purchased options are non-income producing investments.

o     Forward foreign exchange contracts -- The Portfolio may enter into forward
      foreign exchange contracts as a hedge against either specific transactions
      or portfolio positions. The contract is marked-to-market daily and the
      change in market value is recorded by the Portfolio as an unrealized gain
      or loss. When the contract is closed, the Portfolio records a realized
      gain or loss equal to the difference between the value at the time it was
      opened and the value at the time it was closed.

o     Foreign currency options and futures -- The Portfolio may also purchase or
      sell listed or over-the-counter foreign currency options, foreign currency
      futures and related options on foreign currency futures as a short or long
      hedge against possible variations in foreign exchange rates. Such
      transactions may be effected with respect to hedges on non-U.S. dollar
      denominated securities owned by the Portfolio, sold by the Portfolio but
      not yet delivered, or committed or anticipated to be purchased by the
      Portfolio.

(c) Foreign currency transactions -- Transactions denominated in foreign
currencies are recorded at the exchange rate prevailing when recognized. Assets
and liabilities denominated in foreign currencies are valued at the exchange
rate at the end of the period. Foreign currency transactions are the result of
settling (realized) or valuing (unrealized) assets or liabilities expressed in
foreign currencies into U.S. dollars. Realized and unrealized gains or losses
from investments include the effects of foreign exchange rates on investments.

(d) Income taxes -- The Portfolio is considered as a "pass through" entity for
Federal income tax purposes. As such, each investor in the Portfolio is treated
as owner of its proportionate share of the net assets, income, expenses and
realized and unrealized gains and losses of the Portfolio. Therefore, no Federal
income tax provision is required. Under the applicable foreign tax law, a
withholding tax may be imposed on interest, dividends and capital gains at
various rates. It is intended that the Portfolio's assets will be managed so an
investor in the Portfolio can satisfy the requirements of subchapter M of the
Internal Revenue Code.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        27


[LOGO] Merrill Lynch Investment Managers

Notes to Financial Statements (continued)      Master Large Cap Growth Portfolio

(e) Security transactions and investment income -- Security transactions are
accounted for on the date the securities are purchased or sold (the trade
dates). Realized gains and losses on security transactions are determined on the
identified cost basis. Dividend income is recorded on the ex-dividend dates.
Dividends from foreign securities where the ex-dividend date may have passed are
subsequently recorded when the Portfolio has determined the ex-dividend date.
Interest income is recognized on the accrual basis.

(f) Securities lending -- The Portfolio may lend securities to financial
institutions that provide cash or securities issued or guaranteed by the U.S.
government as collateral, which will be maintained at all times in an amount
equal to at least 100% of the current market value of the loaned securities. The
market value of the loaned securities is determined at the close of business of
the Portfolio and any additional required collateral is delivered to the
Portfolio on the next business day. Where the Portfolio receives securities as
collateral for the loaned securities, it receives a fee from the borrower. The
Portfolio typically receives the income on the loaned securities, but does not
receive the income on the collateral. Where the Portfolio receives cash
collateral, it may invest such collateral and retain the amount earned on such
investment, net of any amount rebated to the borrower. Loans of securities are
terminable at any time and the borrower, after notice, is required to return
borrowed securities within five business days. The Portfolio may pay reasonable
finder's, lending agent, administrative and custodial fees in connection with
its loans. In the event that the borrower defaults on its obligation to return
borrowed securities because of insolvency or for any other reason, the Portfolio
could experience delays and costs in gaining access to the collateral. The
Portfolio also could suffer a loss where the value of the collateral falls below
the market value of the borrowed securities, in the event of borrower default or
in the event of losses on investments made with cash collateral.

2. Investment Advisory Agreement and Transactions with Affiliates:

The Trust has entered into an Investment Advisory Agreement with Fund Asset
Management, L.P. ("FAM"). The general partner of FAM is Princeton Services, Inc.
("PSI"), an indirect, wholly-owned subsidiary of Merrill Lynch & Co., Inc. ("ML
& Co."), which is the limited partner.

FAM is responsible for the management of the Portfolio's investments and
provides the necessary personnel, facilities, equipment and certain other
services necessary to the operations of the Portfolio. For such services, the
Portfolio pays a monthly fee at an annual rate of .50% of the average daily
value of the Portfolio's net assets. FAM has entered into a Sub-Advisory
Agreement with Merrill Lynch Asset Management U.K., Limited ("MLAM U.K."), an
affiliate of FAM, pursuant to which MLAM U.K. provides investment advisory
services to FAM with respect to the Portfolio. There is no increase in the
aggregate fees paid by the Portfolio for these services.

The Portfolio has received an exemptive order from the Securities and Exchange
Commission permitting it to lend portfolio securities to Merrill Lynch, Pierce,
Fenner & Smith Incorporated ("MLPF&S"), a subsidiary of ML & Co., or its
affiliates. As of April 30, 2004, the Portfolio lent securities with a value of
$3,448,255 to MLPF&S or its affiliates. Pursuant to that order, the Portfolio
also has retained Merrill Lynch Investment Managers, LLC ("MLIM, LLC"), an
affiliate of FAM, as the securities lending agent for a fee based on a share of
the returns on investment of cash collateral. MLIM, LLC may, on behalf of the
Portfolio, invest cash collateral received by the Portfolio for such loans,
among other things, in a private investment company managed by MLIM, LLC or in
registered money market funds advised by FAM or its affiliates. For the six
months ended April 30, 2004, MLIM, LLC received $5,748 in securities lending
agent fees.


28      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Notes to Financial Statements (concluded)      Master Large Cap Growth Portfolio

For the six months ended April 30, 2004, the Portfolio reimbursed FAM $2,711 for
certain accounting services.

Certain officers and/or trustees of the Trust are officers and/or directors of
FAM, PSI, MLAM U.K. and/or ML & Co.

3. Investments:

Purchases and sales of investments, excluding short-term securities, for the six
months ended April 30, 2004 were $220,013,480 and $180,056,832, respectively.

Net realized gains for the six months ended April 30, 2004 and net unrealized
appreciation as of April 30, 2004 were as follows:

- --------------------------------------------------------------------------------
                                                 Realized            Unrealized
                                                   Gains            Appreciation
- --------------------------------------------------------------------------------
Long-term investments ................          $16,932,671          $25,901,746
                                                --------------------------------
Total ................................          $16,932,671          $25,901,746
                                                ================================

As of April 30, 2004, net unrealized appreciation for Federal income tax
purposes aggregated $21,355,227, of which $36,045,942 related to appreciated
securities and $14,690,715 related to depreciated securities. At April 30, 2004,
the aggregate cost of investments for Federal income tax purposes was
$311,178,123.

4. Short-Term Borrowings:

The Portfolio, along with certain other funds managed by FAM and its affiliates,
is party to a $500,000,000 credit agreement with Bank One, N.A. and certain
other lenders. The Portfolio may borrow under the credit agreement to fund
investor withdrawals and for other lawful purposes other than for leverage. The
Portfolio may borrow up to the maximum amount allowable under the Portfolio's
current prospectus and statement of additional information, subject to various
other legal, regulatory or contractual limits. The Portfolio pays a commitment
fee of .09% per annum based on the Portfolio's pro rata share of the unused
portion of the facility. Amounts borrowed under the facility bear interest at a
rate equal to, at each fund's election, the Federal Funds rate plus .50% or a
base rate as determined by Bank One, N.A. On November 28, 2003, the credit
agreement was renewed for one year under the same terms. The Portfolio did not
borrow under the facility during the six months ended April 30, 2004.


        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        29


[LOGO] Merrill Lynch Investment Managers

Officers and Directors/Trustees

Terry K. Glenn, President and Director/Trustee
James H. Bodurtha, Director/Trustee
Joe Grills, Director/Trustee
Herbert I. London, Director/Trustee
Andre F. Perold, Director/Trustee
Roberta Cooper Ramo, Director/Trustee
Robert S. Salomon, Jr., Director/Trustee
Stephen B. Swensrud, Director/Trustee
Robert C. Doll, Jr., Senior Vice President and
  Senior Portfolio Manager
Donald C. Burke, Vice President and Treasurer
Phillip S. Gillespie, Secretary

Custodian

Brown Brothers Harriman & Co.
40 Water Street
Boston, MA 02109-3661

Transfer Agent

Financial Data Services, Inc.
4800 Deer Lake Drive East
Jacksonville, FL 32246-6484
800-637-3863


30      MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004


Electronic Delivery

The Fund offers electronic delivery of communications to its shareholders. In
order to receive this service, you must register your account and provide us
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        MERRILL LYNCH LARGE CAP GROWTH FUND             APRIL 30, 2004        31


[LOGO] Merrill Lynch Investment Managers                         www.mlim.ml.com

This report is not authorized for use as an offer of sale or a solicitation of
an offer to buy shares of the Fund unless accompanied or preceded by the Fund's
current prospectus. Past performance results shown in this report should not be
considered a representation of future performance. Investment return and
principal value of shares will fluctuate so that shares, when redeemed, may be
worth more or less than their original cost. Statements and other information
herein are as dated and are subject to change.

A description of the policies and procedures that the Fund uses to determine how
to vote proxies relating to portfolio securities is available (1) without
charge, upon request, by calling toll-free 1-800-MER-FUND (1-800-637-3863); (2)
on www.mutualfunds.ml.com; and (3) on the Securities and Exchange Commission's
website at http://www.sec.gov.

Merrill Lynch Large Cap Growth Fund of
Merrill Lynch Large Cap Series Funds, Inc.
Box 9011
Princeton, NJ
08543-9011

                                                                #CAPGROW -- 4/04



Item 2 - Code of Ethics - Not Applicable to this semi-annual report

Item 3 - Audit Committee Financial Expert - Not Applicable to this semi-annual
         report

Item 4 - Principal Accountant Fees and Services - Not Applicable to this
         semi-annual report

Item 5 - Audit Committee of Listed Registrants - Not Applicable

Item 6 - Schedule of Investments - Not Applicable

Item 7 - Disclosure of Proxy Voting Policies and Procedures for Closed-End
         Management Investment Companies - Not Applicable

Item 8 - Purchases of Equity Securities by Closed-End Management Investment
         Company and Affiliated Purchasers - Not Applicable

Item 9 - Submission of Matters to a Vote of Security Holders - Not Applicable

Item 10 - Controls and Procedures

10(a) - The registrant's certifying officers have reasonably designed such
        disclosure controls and procedures to ensure material information
        relating to the registrant is made known to us by others particularly
        during the period in which this report is being prepared. The
        registrant's certifying officers have determined that the registrant's
        disclosure controls and procedures are effective based on our evaluation
        of these controls and procedures as of a date within 90 days prior to
        the filing date of this report.

10(b) - There were no changes in the registrant's internal control over
        financial reporting (as defined in Rule 30a-3(d) under the Act (17 CFR
        270.30a-3(d)) that occurred during the last fiscal half-year of the
        period covered by this report that has materially affected, or is
        reasonably likely to materially affect, the registrant's internal
        control over financial reporting.

Item 11 - Exhibits attached hereto

11(a)(1) - Code of Ethics - Not Applicable to this semi-annual report

11(a)(2) - Certifications - Attached hereto

11(a)(3) - Not Applicable

11(b) - Certifications - Attached hereto

        Pursuant to the requirements of the Securities Exchange Act of 1934 and
        the Investment Company Act of 1940, the registrant has duly caused this
        report to be signed on its behalf by the undersigned, thereunto duly
        authorized.

        Merrill Lynch Large Cap Growth Fund of Merrill Lynch Large Cap Series
        Funds, Inc. and Master Large Cap Growth Portfolio of Master Large Cap
        Series Trust




        By: /s/ Terry K. Glenn
            -----------------------------
            Terry K. Glenn,
            President of
            Merrill Lynch Large Cap Growth Fund of Merrill Lynch Large Cap
            Series Funds, Inc. and Master Large Cap Growth Portfolio of Master
            Large Cap Series Trust

        Date: June 18, 2004

        Pursuant to the requirements of the Securities Exchange Act of 1934 and
        the Investment Company Act of 1940, this report has been signed below by
        the following persons on behalf of the registrant and in the capacities
        and on the dates indicated.


        By: /s/ Terry K. Glenn
            -----------------------------
            Terry K. Glenn,
            President of
            Merrill Lynch Large Cap Growth Fund of Merrill Lynch Large Cap
            Series Funds, Inc. and Master Large Cap Growth Portfolio of Master
            Large Cap Series Trust

        Date: June 18, 2004


        By: /s/ Donald C. Burke
            -----------------------------
            Donald C. Burke,
            Chief Financial Officer of
            Merrill Lynch Large Cap Growth Fund of Merrill Lynch Large Cap
            Series Funds, Inc. and Master Large Cap Growth Portfolio of Master
            Large Cap Series Trust

        Date: June 18, 2004