Statement of Additional Information (SAI) Supplement American Century World Mutual Funds, Inc.
Supplement dated August 4, 2023 n Statement of Additional Information dated April 1, 2023

The following entry is added for Stephen Quance in the Accounts Managed table on pages 33 and 34 of the SAI:

Accounts Managed
		Registered Investment Companies (e.g., American Century Investments funds and American Century Investments - subadvised funds)	Other Pooled Investment Vehicles (e.g., commingled trusts and 529 education savings plans)	Other Accounts (e.g., separate accounts and corporate accounts, including incubation strategies and corporate money)
Stephen Quance1	Number of Accounts	9	0	0
	Assets	$7.8 billion2	$0	$0

1 Information provided as of July 31, 2023.

2 Includes $1.5 billion in International Value.

The following entries are added in the Ownership of Securities table on pages 36 and 37 of the SAI:

Ownership of Securities
	Aggregate Dollar Range of Securities in Fund
International Value
Stephen Quance1	A

1 Information provided as of July 31, 2023.

Ranges: A – none; B – $1-$10,000; C – $10,001-$50,000; D – $50,001-$100,000; E – $100,001-$500,000;
F – $500,001-$1,000,000; G – More than $1,000,000.

©2023 American Century Proprietary Holdings, Inc. All rights reserved.

CL-SPL-98219  2308