<SEC-DOCUMENT>0000100334-20-000028-index.html : 20200228
<SEC-HEADER>0000100334-20-000028.hdr.sgml : 20200228
<ACCEPTANCE-DATETIME>20200228105613
ACCESSION NUMBER:		0000100334-20-000028
CONFORMED SUBMISSION TYPE:	497K
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20200228
DATE AS OF CHANGE:		20200228
EFFECTIVENESS DATE:		20200228

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMERICAN CENTURY MUTUAL FUNDS, INC.
		CENTRAL INDEX KEY:			0000100334
		IRS NUMBER:				446006315
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		497K
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-14213
		FILM NUMBER:		20666664

	BUSINESS ADDRESS:	
		STREET 1:		4500 MAIN STREET
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64111
		BUSINESS PHONE:		816-531-5575

	MAIL ADDRESS:	
		STREET 1:		4500 MAIN STREET
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64111

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMERICAN CENTURY MUTUAL FUNDS INC
		DATE OF NAME CHANGE:	19970107

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TWENTIETH CENTURY INVESTORS INC
		DATE OF NAME CHANGE:	19920703
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000100334
<SERIES-ID>S000006206
<SERIES-NAME>HERITAGE FUND
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000017106
<CLASS-CONTRACT-NAME>INVESTOR CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>TWHIX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000017107
<CLASS-CONTRACT-NAME>A CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>ATHAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000017108
<CLASS-CONTRACT-NAME>I CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>ATHIX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000017109
<CLASS-CONTRACT-NAME>C CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>AHGCX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000055524
<CLASS-CONTRACT-NAME>R CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>ATHWX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000129042
<CLASS-CONTRACT-NAME>R6 CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>ATHDX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000189745
<CLASS-CONTRACT-NAME>R5 CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>ATHGX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000189746
<CLASS-CONTRACT-NAME>Y CLASS
<CLASS-CONTRACT-TICKER-SYMBOL>ATHYX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497K
<SEQUENCE>1
<FILENAME>acmf2020497kheritagefund.htm
<DESCRIPTION>497K
<TEXT>
Document 1 - file: acmf2020497kheritagefund.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>chart-f5856627d58183ddb3aa01.jpg
<TEXT>
Document 2 - file: chart-f5856627d58183ddb3aa01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>newaci_logoblkg33.jpg
<TEXT>
Document 3 - file: newaci_logoblkg33.jpg

</DOCUMENT>
</SEC-DOCUMENT>