<SEC-DOCUMENT>0000926877-17-000237-index.html : 20171129
<SEC-HEADER>0000926877-17-000237.hdr.sgml : 20171129
<ACCEPTANCE-DATETIME>20171129095521
ACCESSION NUMBER:		0000926877-17-000237
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170930
FILED AS OF DATE:		20171129
DATE AS OF CHANGE:		20171129
EFFECTIVENESS DATE:		20171129

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MARSICO INVESTMENT FUND
		CENTRAL INDEX KEY:			0001047112
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-08397
		FILM NUMBER:		171227020

	BUSINESS ADDRESS:	
		STREET 1:		1200 17TH ST
		STREET 2:		STE 1600
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202
		BUSINESS PHONE:		3034545600

	MAIL ADDRESS:	
		STREET 1:		1200 17TH STREET SUITE 1600
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0001047112
<SERIES-ID>S000007710
<SERIES-NAME>MARSICO FOCUS FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000020960
<CLASS-CONTRACT-NAME>MARSICO FOCUS FUND
<CLASS-CONTRACT-TICKER-SYMBOL>MFOCX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001047112
<SERIES-ID>S000007711
<SERIES-NAME>MARSICO GROWTH FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000020961
<CLASS-CONTRACT-NAME>MARSICO GROWTH FUND
<CLASS-CONTRACT-TICKER-SYMBOL>MGRIX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001047112
<SERIES-ID>S000007712
<SERIES-NAME>MARSICO 21ST CENTURY FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000020962
<CLASS-CONTRACT-NAME>MARSICO 21ST CENTURY FUND
<CLASS-CONTRACT-TICKER-SYMBOL>MXXIX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001047112
<SERIES-ID>S000007713
<SERIES-NAME>MARSICO INTERNATIONAL OPPORTUNITIES FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000020963
<CLASS-CONTRACT-NAME>MARSICO INTERNATIONAL OPPORTUNITIES FUND
<CLASS-CONTRACT-TICKER-SYMBOL>MIOFX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001047112
<SERIES-ID>S000014643
<SERIES-NAME>MARSICO FLEXIBLE CAPITAL FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000040092
<CLASS-CONTRACT-NAME>MARSICO FLEXIBLE CAPITAL FUND
<CLASS-CONTRACT-TICKER-SYMBOL>MFCFX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001047112
<SERIES-ID>S000017705
<SERIES-NAME>MARSICO GLOBAL FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000048905
<CLASS-CONTRACT-NAME>MARSICO GLOBAL FUND
<CLASS-CONTRACT-TICKER-SYMBOL>MGLBX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>NSAR-B
<SEQUENCE>1
<FILENAME>answer.fil
<DESCRIPTION>ANSWER
<TEXT>
Document 1 - file: answer.fil

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>Marsico2017N-SAR.txt
<DESCRIPTION>INTERNALCONTROL
<TEXT>
Document 2 - file: Marsico2017N-SAR.txt

</DOCUMENT>
</SEC-DOCUMENT>