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American Century Mutual Funds Inc.

07/02/2026 | Press release | Distributed by Public on 07/02/2026 14:56

Prospectus by Investment Company (Form 497)


Statement of Additional Information (SAI) Supplement
American Century Mutual Funds, Inc.
Supplement dated July 3, 2026 n Statement of Additional Information dated March 1, 2026

Joseph Reiland, CFA, Vice President and Senior Portfolio Manager, has announced his plans to retire. As a result, he will no longer serve as a portfolio manager for the funds effective July 31, 2026.

Justin Brown, CFA, Vice President and Portfolio Manager, no longer serves as portfolio manager for the funds effective July 31, 2026.

Effective July 15, 2026, Richard Weiss, Radu Gabudean, Ph.D., Vidya Rajappa, CFA, and Scott Wilson, CFA will be added to the Balanced Fund.


The following replaces the entry for Scott Marolf in the Accounts Managed table on pages 42-43 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)
Scott Marolf1
Number of Accounts 6 1 4
Assets
$18.3 billion2
$582.0 million $658.7 million
1 Information provided as of June 26, 2026.
2 Includes $14.6 billion in Growth Fund and $3.0 billion in Large Cap Equity Fund.

The following entries are added for DJ Cross, Radu Gabudean, Vidya Rajappa, Scott Wilson, and Richard Weiss in the Accounts Managed table on pages 42-43 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)
DJ Cross1
Number of Accounts 6 1 4
Assets
$18.3 billion2
$582.0 million $658.7 million
Radu Gabudean1
Number of Accounts 32 40 14
Assets
$18.5 billion3
$8.8 billion $283.0 million
Vidya Rajappa1
Number of Accounts 32 40 14
Assets
$18.5 billion3
$8.8 billion $283.0 million
Scott Wilson1
Number of Accounts 32 40 14
Assets
$18.3 billion3
$8.8 billion $283.0 million
Richard Weiss1
Number of Accounts 32 40 14
Assets
$18.5 billion3
$8.8 billion $283.0 million
1 Information provided as of June 26, 2026.
2 Includes $14.6 billion in Growth Fund and $3.0 billion in Large Cap Equity Fund.
3 Includes $906.4 million in Balanced Fund.


The following replaces the entry for Scott Marolf in the Ownership of Securities table on page 46 of the SAI:

Ownership of Securities
Aggregate Dollar Range of Securities in Fund
Growth
Scott Marolf1
F
Large Cap Equity
Scott Marolf1
E
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.
1 Information provided as of June 26, 2026.

The following entries for DJ Cross, Radu Gabudean, Vidya Rajappa, Scott Wilson, and Richard Weiss are added in the Ownership of Securities table on page 46 of the SAI:

Ownership of Securities
Aggregate Dollar Range of Securities in Fund
Balanced
Radu Gabudean1
A
Vidya Rajappa1
A
Scott Wilson1
A
Richard Weiss1
A
Growth
DJ Cross1
F
Large Cap Equity
DJ Cross1
B
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.
1 Information provided as of June 26, 2026.


















©2026 American Century Proprietary Holdings, Inc. All rights reserved.
CL-SPL-98902 2607

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