CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT

I, Thomas F. Marsico, Principal Executive Officer of the Marsico Investment
Fund (the "Registrant"), certify that:

1. The Form of the N-CSR of the Registrant (the "Report") for the period
ended September 30, 2003 fully complies with the requirements of Section
13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The Information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the
Registrant.

Date: November 25, 2003                        /s/ Thomas F. Marsico
     -------------------------                 -----------------------------
                                               Thomas F. Marsico, President
                                               (principal executive officer)

A signed original of this written statement required by Section 906 has been
provided to the Marsico Investment Fund and will be retained by the Marsico
Investment Fund and furnished to the SEC or its staff upon request.








      CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT

I, Christopher J. Marsico, Principal Financial Officer of the Marsico
Investment Fund (the "Registrant"), certify that:

1. The Form of the N-CSR of the Registrant (the "Report") for the period
ended September 30, 2003 fully complies with the requirements of Section
13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The Information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the
Registrant.

Date:November 25, 2003                         /s/ Christopher J. Marsico
     -------------------------                 -----------------------------
                                               Christopher J. Marsico,
                                               Vice President and Treasurer
                                               (principal financial officer)

A signed original of this written statement required by Section 906 has been
provided to the Marsico Investment Fund and will be retained by the Marsico
Investment Fund and furnished to the SEC or its staff upon request.