American Century Mutual Funds Inc.

07/31/2026 | Press release | Distributed by Public on 07/31/2026 07:47

Prospectus by Investment Company (Form 497)


American Century Mutual Funds, Inc.
Statement of Additional Information Supplement
Supplement dated August 1, 2026 n Statement of Additional Information dated March 1, 2026


The following replaces the entries for Growth Fund and Ultra Fund in the management fee table under Investment Advisor on pages 39-41 of the Statement of Additional Information:

Fund Class Percentage of Strategy Assets
Growth Investor, A, C, and R 0.830% of the first $25 billion
0.800% over $25 billion
I and R5 0.630% of the first $25 billion
0.600% over $25 billion
Y, R6 and G 0.480% of the first $25 billion
0.450% over $25 billion
Ultra Investor, A, C and R 0.920% of the first $15 billion
0.880% of the next $10 billion
0.800% over $25 billion
I and R5 0.720% of the first $15 billion
0.680% of the next $10 billion
0.600% over $25 billion
Y, R6 and G 0.570% of the first $15 billion
0.530% of the next $10 billion
0.450% over $25 billion

Joseph Reiland, CFA, Vice President and Senior Portfolio Manager, has announced his plans to retire. As a result, he no longer serves as a portfolio manager for the Balanced Fund, Growth Fund, and Large Cap Equity Fund effective July 31, 2026.

Justin Brown, CFA, Vice President and Portfolio Manager, no longer serves as portfolio manager for the Balanced Fund, Growth Fund, and Large Cap Equity Fund effective July 31, 2026.

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

The following replaces the entry for Scott Marolf in the Accounts Managed table on pages 42-43 of the Statement of Additional Information:
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 7 1 4
Assets
$18.7 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, Richard Weiss, and Scott Wilson in the Accounts Managed table on pages 42-43 of the Statement of Additional Information:
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 7 1 4
Assets
$18.7 billion2
$582.0 million $658.7 million
Radu Gabudean1
Number of Accounts 31 40 14
Assets
$18.1 billion3
$8.8 billion $283.0 million
Vidya Rajappa1
Number of Accounts 31 40 14
Assets
$18.1 billion3
$8.8 billion $283.0 million
Richard Weiss1
Number of Accounts 31 40 14
Assets
$18.1 billion3
$8.8 billion $283.0 million
Scott Wilson1
Number of Accounts 30 40 14
Assets
$17.9 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 Statement of Additional Information:
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, Richard Weiss, and Scott Wilson are added in the Ownership of Securities table on page 46 of the Statement of Additional Information:
Ownership of Securities
Aggregate Dollar Range of Securities in Fund
Balanced
Radu Gabudean1
A
Vidya Rajappa1
A
Richard Weiss1
A
Scott Wilson1
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-98919 2608

American Century Mutual Funds Inc. published this content on July 31, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on July 31, 2026 at 13:47 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]