<SEC-DOCUMENT>0000748054-17-000010-index.html : 20170807
<SEC-HEADER>0000748054-17-000010.hdr.sgml : 20170807
<ACCEPTANCE-DATETIME>20170807143023
ACCESSION NUMBER:		0000748054-17-000010
CONFORMED SUBMISSION TYPE:	13F-HR
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170630
FILED AS OF DATE:		20170807
DATE AS OF CHANGE:		20170807
EFFECTIVENESS DATE:		20170807

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMERICAN CENTURY COMPANIES INC
		CENTRAL INDEX KEY:			0000748054
		IRS NUMBER:				431325032
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		13F-HR
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	028-11918
		FILM NUMBER:		171011108

	BUSINESS ADDRESS:	
		STREET 1:		4500 MAIN STREET
		CITY:			KANSAS CITY
		STATE:			MO
		ZIP:			64111
		BUSINESS PHONE:		8165315575

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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TWENTIETH CENTURY COMPANIES INC
		DATE OF NAME CHANGE:	19940105
</SEC-HEADER>
<DOCUMENT>
<TYPE>13F-HR
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>INFORMATION TABLE
<SEQUENCE>2
<FILENAME>form13fInfoTable.xml
<DESCRIPTION>DESCRIPTION FOR INFORMATION TABLE
<TEXT>
Document 2 - file: form13fInfoTable.html

Document 2 - RAW XML: form13fInfoTable.xml

</DOCUMENT>
</SEC-DOCUMENT>