American Century Mutual Funds Inc.
07/31/2026 | Press release | Distributed by Public on 07/31/2026 07:45
Prospectus by Investment Company (Form 497)
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American Century Mutual Funds, Inc.
Prospectus Supplement
Growth Fund
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Supplement dated August 1, 2026 n Prospectus dated March 1, 2026
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The following replaces the Fees and Expenses tables on page 2 of the prospectus:
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Shareholder Fees (fees paid directly from your investment)
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| Investor | I | Y | A | C | R | R5 | R6 | G | |||||||||||||||||||||
| Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) | None | None | None | 5.75% | None | None | None | None | None | ||||||||||||||||||||
| Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase) | None | None | None | None¹ | 1.00% | None | None | None | None | ||||||||||||||||||||
| Maximum Annual Account Maintenance Fee (waived for unmatured Giftrust accounts or if eligible investments total at least $25,000 or shareholder has elected electronic delivery) | $25 | None | None | None | None | None | None | None | None | ||||||||||||||||||||
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Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
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| Investor | I | Y | A | C | R | R5 | R6 | G | |||||||||||||||||||||
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Management Fee2
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0.83% | 0.63% | 0.48% | 0.83% | 0.83% | 0.83% | 0.63% | 0.48% | 0.48% | ||||||||||||||||||||
| Distribution and Service (12b-1) Fees | None | None | None | 0.25% | 1.00% | 0.50% | None | None | None | ||||||||||||||||||||
| Other Expenses | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | ||||||||||||||||||||
| Total Annual Fund Operating Expenses | 0.83% | 0.63% | 0.48% | 1.08% | 1.83% | 1.33% | 0.63% | 0.48% | 0.48% | ||||||||||||||||||||
| Fee Waiver | None | None | None | None | None | None | None | None | 0.48%³ | ||||||||||||||||||||
| Total Annual Fund Operating Expenses After Fee Waiver | 0.83% | 0.63% | 0.48% | 1.08% | 1.83% | 1.33% | 0.63% | 0.48% | 0.00% | ||||||||||||||||||||
1 Purchases of $1 million or more may be subject to a contingent deferred sales charge of 1.00% if the shares are redeemed within one year of the date of the purchase.
2 The management fee has been restated to reflect the decrease in the management fee schedule effective August 1, 2026.
3 The advisor has agreed to waive the G Class's management fee in its entirety. The advisor expects this fee waiver to remain in effect permanently and cannot terminate it without the approval of the Board of Directors.
The following replaces the Example section on pages 2 and 3 of the prospectus:
The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods and that you earn a 5% return each year. The example also assumes that the fund's operating expenses remain the same except, that it reflects the rate and duration of any fee waivers noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
| 1 year | 3 years | 5 years | 10 years | |||||||||||
| Investor Class | $85 | $265 | $461 | $1,026 | ||||||||||
| I Class | $65 | $202 | $352 | $787 | ||||||||||
| Y Class | $49 | $154 | $269 | $604 | ||||||||||
| A Class | $679 | $899 | $1,137 | $1,816 | ||||||||||
| C Class | $186 | $576 | $991 | $1,950 | ||||||||||
| R Class | $136 | $422 | $730 | $1,601 | ||||||||||
| R5 Class | $65 | $202 | $352 | $787 | ||||||||||
| R6 Class | $49 | $154 | $269 | $604 | ||||||||||
| G Class | $0 | $0 | $0 | $0 | ||||||||||
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©2026 American Century Proprietary Holdings, Inc. All rights reserved. CL-SPL-98904 2608 |
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American Century Mutual Funds, Inc.
Prospectus Supplement
Select Fund
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Supplement dated August 1, 2026 n Prospectus dated March 1, 2026
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The following replaces the Fees and Expenses tables on page 2 of the prospectus:
|
Shareholder Fees (fees paid directly from your investment)
|
|||||||||||||||||||||||||||||
| Investor | I | Y | A | C | R | R5 | R6 | G | |||||||||||||||||||||
| Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) | None | None | None | 5.75% | None | None | None | None | None | ||||||||||||||||||||
| Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase) | None | None | None | None¹ | 1.00% | None | None | None | None | ||||||||||||||||||||
| Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $25,000 or shareholder has elected electronic delivery) | $25 | None | None | None | None | None | None | None | None | ||||||||||||||||||||
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Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
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| Investor | I | Y | A | C | R | R5 | R6 | G | |||||||||||||||||||||
| Management Fee | 0.98% | 0.78% | 0.63% | 0.98% | 0.98% | 0.98% | 0.78% | 0.63% | 0.63% | ||||||||||||||||||||
| Distribution and Service (12b-1) Fees | None | None | None | 0.25% | 1.00% | 0.50% | None | None | None | ||||||||||||||||||||
| Other Expenses | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | ||||||||||||||||||||
| Total Annual Fund Operating Expenses | 0.98% | 0.78% | 0.63% | 1.23% | 1.98% | 1.48% | 0.78% | 0.63% | 0.63% | ||||||||||||||||||||
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Fee Waiver2
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0.08% | 0.08% | 0.08% | 0.08% | 0.08% | 0.08% | 0.08% | 0.08% | 0.63%³ | ||||||||||||||||||||
| Total Annual Fund Operating Expenses After Fee Waiver | 0.90% | 0.70% | 0.55% | 1.15% | 1.90% | 1.40% | 0.70% | 0.55% | 0.00% | ||||||||||||||||||||
1 Purchases of $1 million or more may be subject to a contingent deferred sales charge of 1.00% if the shares are redeemed within one year of the date of the purchase.
2 The advisor has agreed to waive a portion of the fund's management fee such that the management fee does not exceed 0.897% for Investor, A, C and R Classes, 0.697% for I and R5 Classes, and 0.547% for Y and R6 Classes. The advisor expects this waiver arrangement to continue until February 29, 2028 and cannot terminate it prior to such date without the approval of the Board of Directors.
3 The advisor has agreed to waive the G Class's management fee in its entirety. The advisor expects this fee waiver to remain in effect permanently and cannot terminate it without the approval of the Board of Directors.
The following replaces the Example section on pages 2 and 3 of the prospectus:
The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods and that you earn a 5% return each year. The example also assumes that the fund's operating expenses remain the same, except that it reflects the rate and duration of any fee waivers noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
| 1 year | 3 years | 5 years | 10 years | |||||||||||
| Investor Class | $92 | $305 | $535 | $1,194 | ||||||||||
| I Class | $72 | $242 | $426 | $959 | ||||||||||
| Y Class | $56 | $194 | $344 | $779 | ||||||||||
| A Class | $686 | $936 | $1,205 | $1,971 | ||||||||||
| C Class | $193 | $615 | $1,061 | $2,104 | ||||||||||
| R Class | $143 | $461 | $801 | $1,760 | ||||||||||
| R5 Class | $72 | $242 | $426 | $959 | ||||||||||
| R6 Class | $56 | $194 | $344 | $779 | ||||||||||
| G Class | $0 | $0 | $0 | $0 | ||||||||||
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©2026 American Century Proprietary Holdings, Inc. All rights reserved. CL-SPL-98905 2608 |
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American Century Mutual Funds, Inc.
Prospectus Supplement
Ultra Fund
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Supplement dated August 1, 2026 n Prospectus dated March 1, 2026
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The following replaces the Fees and Expenses tables on page 2 of the prospectus:
|
Shareholder Fees (fees paid directly from your investment)
|
|||||||||||||||||||||||||||||
| Investor | I | Y | A | C | R | R5 | R6 | G | |||||||||||||||||||||
| Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) | None | None | None | 5.75% | None | None | None | None | None | ||||||||||||||||||||
| Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase) | None | None | None | None¹ | 1.00% | None | None | None | None | ||||||||||||||||||||
| Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $25,000 or shareholder has elected electronic delivery) | $25 | None | None | None | None | None | None | None | None | ||||||||||||||||||||
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Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
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| Investor | I | Y | A | C | R | R5 | R6 | G | |||||||||||||||||||||
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Management Fee2
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0.87% | 0.67% | 0.52% | 0.87% | 0.87% | 0.87% | 0.67% | 0.52% | 0.52% | ||||||||||||||||||||
| Distribution and Service (12b-1) Fees | None | None | None | 0.25% | 1.00% | 0.50% | None | None | None | ||||||||||||||||||||
| Other Expenses | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | ||||||||||||||||||||
| Total Annual Fund Operating Expenses | 0.87% | 0.67% | 0.52% | 1.12% | 1.87% | 1.37% | 0.67% | 0.52% | 0.52% | ||||||||||||||||||||
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Fee Waiver
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None | None | None | None | None | None | None | None | 0.52%³ | ||||||||||||||||||||
| Total Annual Fund Operating Expenses After Fee Waiver | 0.87% | 0.67% | 0.52% | 1.12% | 1.87% | 1.37% | 0.67% | 0.52% | 0.00% | ||||||||||||||||||||
1 Purchases of $1 million or more may be subject to a contingent deferred sales charge of 1.00% if the shares are redeemed within one year of the date of the purchase.
2 The management fee has been restated to reflect the decrease in the management fee schedule effective August 1, 2026.
3 The advisor has agreed to waive the G Class's management fee in its entirety. The advisor expects this waiver to remain in effect permanently and cannot terminate it without the approval of the Board of Directors.
The following replaces the Example section on pages 2 and 3 of the prospectus:
The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods and that you earn a 5% return each year. The example also assumes that the fund's operating expenses remain the same, except that it reflects the rate and duration of any fee waivers noted in the table above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
| 1 year | 3 years | 5 years | 10 years | |||||||||||
| Investor Class | $89 | $278 | $483 | $1,073 | ||||||||||
| I Class | $69 | $215 | $374 | $835 | ||||||||||
| Y Class | $53 | $167 | $291 | $653 | ||||||||||
| A Class | $683 | $911 | $1,157 | $1,860 | ||||||||||
| C Class | $190 | $589 | $1,012 | $1,993 | ||||||||||
| R Class | $140 | $435 | $751 | $1,645 | ||||||||||
| R5 Class | $69 | $215 | $374 | $835 | ||||||||||
| R6 Class | $53 | $167 | $291 | $653 | ||||||||||
| G Class | $0 | $0 | $0 | $0 | ||||||||||
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©2026 American Century Proprietary Holdings, Inc. All rights reserved. CL-SPL-98906 2608 |
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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 13:45 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]