MARSICO INVESTMENT FUND
NSAR-B, 1999-11-26
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<PAGE>      PAGE  1
000 B000000 09/30/99
000 C000000 0001047112
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 THE MARSICO INVESTMENT FUND
001 B000000 811-8397
001 C000000 4142715885
002 A000000 1200 17TH STREET SUITE 1300
002 B000000 DENVER
002 C000000 CO
002 D010000 80202
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 Y
007 B000000  2
007 C010100  1
007 C020100 FOCUS FUND
007 C030100 N
007 C010200  2
007 C020200 GROWTH & INCOME FUND
007 C030200 N
007 C010300  3
007 C010400  4
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
008 A00AA01 MARSICO CAPITAL MANAGEMENT LLC
008 B00AA01 A
008 C00AA01 801-54914
008 D01AA01 DENVER
008 D02AA01 CO
008 D03AA01 80202
010 A00AA01 SUNSTONE FINANCIAL GROUP INC
010 B00AA01 84-5792
010 C01AA01 MILWAUKEE
010 C02AA01 WI
010 C03AA01 53202
011 A00AA01 SUNSTONE DISTRIBUTION SERVICES LLC
011 B00AA01 8-42106
011 C01AA01 MILWAUKEE
011 C02AA01 WI
<PAGE>      PAGE  2
011 C03AA01 53202
012 A00AA01 SUNSTONE FINANCIAL GROUP INC
012 B00AA01 84-5792
012 C01AA01 MILWAUKEE
012 C02AA01 WI
012 C03AA01 53202
013 A00AA01 PRICEWATERHOUSECOOPERS LLP
013 B01AA01 DENVER
013 B02AA01 CO
013 B03AA01 80202
014 A00AA01 NATIONSBANC MONTGOMERY SECURITIES
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015 A00AA01 STATE STREET BANK & TRUST CO
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<PAGE>      PAGE  5
015 A00AA29 STATE STREET LONDON LTD
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<PAGE>      PAGE  6
022 A000004 CHARLES SCHWAB & CO,INC
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<PAGE>      PAGE  9
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<PAGE>      PAGE  11
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<PAGE>      PAGE  13
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SIGNATURE   DEREK PETERSEN
TITLE       FINANCIAL ANALYST


WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001047112
<NAME> THE MARSICO INVESTMENT FUND
<SERIES>
   <NUMBER> 1
   <NAME> FOCUS FUND
<MULTIPLIER> 1000

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-START>                             OCT-01-1998
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                        1,908,594
<INVESTMENTS-AT-VALUE>                       2,295,557
<RECEIVABLES>                                   45,102
<ASSETS-OTHER>                                     161
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<SENIOR-LONG-TERM-DEBT>                              0
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<SENIOR-EQUITY>                                      0
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<SHARES-COMMON-STOCK>                          129,525
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<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
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<OTHER-INCOME>                                       0
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<NET-INVESTMENT-INCOME>                        (7,311)
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<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
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<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                       1,399,884
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                     (39,630)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           14,486
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 22,322
<AVERAGE-NET-ASSETS>                         1,704,291
<PER-SHARE-NAV-BEGIN>                            12.36
<PER-SHARE-NII>                                 (0.06)
<PER-SHARE-GAIN-APPREC>                           5.13
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              17.43
<EXPENSE-RATIO>                                   1.31
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0001047112
<NAME> THE MARSICO INVESTMENT FUND
<SERIES>
   <NUMBER> 2
   <NAME> GROWTH & INCOME FUND
<MULTIPLIER> 1000

<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          SEP-30-1999
<PERIOD-START>                             OCT-01-1998
<PERIOD-END>                               SEP-30-1999
<INVESTMENTS-AT-COST>                          586,923
<INVESTMENTS-AT-VALUE>                         694,128
<RECEIVABLES>                                    8,352
<ASSETS-OTHER>                                     128
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 702,608
<PAYABLE-FOR-SECURITIES>                        12,811
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        1,307
<TOTAL-LIABILITIES>                             14,118
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       579,674
<SHARES-COMMON-STOCK>                           42,269
<SHARES-COMMON-PRIOR>                           22,833
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          1,611
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       107,205
<NET-ASSETS>                                   688,490
<DIVIDEND-INCOME>                                3,368
<INTEREST-INCOME>                                1,525
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 (7,241)
<NET-INVESTMENT-INCOME>                        (2,348)
<REALIZED-GAINS-CURRENT>                        19,029
<APPREC-INCREASE-CURRENT>                      110,403
<NET-CHANGE-FROM-OPS>                          127,084
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         32,231
<NUMBER-OF-SHARES-REDEEMED>                     12,795
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                         424,971
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                     (15,087)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            4,570
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  7,291
<AVERAGE-NET-ASSETS>                           508,320
<PER-SHARE-NAV-BEGIN>                            11.54
<PER-SHARE-NII>                                 (0.06)
<PER-SHARE-GAIN-APPREC>                           4.81
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              16.29
<EXPENSE-RATIO>                                   1.43
[AVG-DEBT-OUTSTANDING]                               0
[AVG-DEBT-PER-SHARE]                                 0


</TABLE>

THE MARSICO INVESTMENT FUND

FORM N-SAR

Report for the Period Ending September 30, 1999


Item 77B - Accountant's Report on Internal Control

To the Board of Trustees and Shareholders of
The Marsico Investment Fund


In planning and performing our audits of the financial
statements of The Marsico Investment Fund for the year ended
September 30, 1999, we considered its internal control,
including control activities for safeguarding securities, in
order to determine our auditing procedures for the purpose of
expressing our opinion on the financial statements and to
comply with the requirements of Form N-SAR, not to provide
assurance on internal control.

The management of The Marsico Investment Fund is responsible
for establishing and maintaining internal control.  In
fulfilling this responsibility, estimates and judgments by
management are required to assess the expected benefits and
related costs of controls.  Generally, controls that are
relevant to an audit pertain to the entity's objective of
preparing financial statements for external purposes that are
fairly presented in conformity with generally accepted
accounting principles.  Those controls include the safeguarding
of assets against unauthorized acquisition, use or disposition.

Because of inherent limitations in internal control, errors or
fraud may occur and not be detected.  Also, projection of any
evaluation of internal control to future periods is subject to
the risk that it may become inadequate because of changes in
conditions or that the effectiveness of the design and
operation may deteriorate.

Our consideration of internal control would not necessarily
disclose all matters in internal control that might be material
weaknesses under standards established by the American
Institute of Certified Public Accountants.  A material weakness
is a condition in which the design or operation of one or more
of the internal control components does not reduce to a
relatively low level the risk that misstatements caused by
error or fraud in amounts that would be material in relation to
the financial statements being audited may occur and not be
detected within a timely period by employees in the normal
course of performing their assigned functions.  However, we
noted no matters involving internal control and its operation,
including controls for safeguarding securities, that we
consider to be material weaknesses as defined above as of
September 30, 1999.

This report is intended solely for the information and use of
management and the Board of Trustees of the The Marsico
Investment Fund and the Securities and Exchange Commission and
is not intended to be and should not be used by anyone other
than these specified parties.




PricewaterhouseCoopers LLP
Denver, Colorado
November 3, 1999










Exhibit to Accompany
Item 77J
FORM N-SAR
THE MARSICO INVESTMENT FUND
(the "Funds")

In accordance with the provisions of Statement of Position 93-2,
"Determination, Disclosure and Financial Statement Presentation
of Income, Capital Gain and Return of Capital Distributions by
Investment Companies," the Funds are required to report the
accumulated net investment income (loss) and accumulated net
capital gain (loss) accounts to approximate amounts available for
future distributions on a tax basis (or to offset future realized
capital gains).  Accordingly, reclassifications were recorded to
decrease undistributed net investment loss by $7,310,753 and
$2,347,753, decrease accumulated net realized gain on investments
by $7,294,172 and $2,331,175, and decrease paid-in capital by
$16,581 and $16,578 in the Focus and Growth & Income Funds,
respectively.

These reclassifications have no impact on the net asset values of
the Funds and are designed to present the Funds' capital accounts
on a tax basis.




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