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American Mutual Fund

American Mutual Fund

American Mutual Fund® Prospectus Supplement January 29, 2021 (for prospectus dated January 1, 2021, as supplemented to date)    

Average annual total returns For the periods ended December 31, 2019 (with maximum sales charge):

The table under the heading “Average annual total returns – Share class A” in the “Investment results” section of the prospectus is amended to read as follows:

Average Annual Returns - American Mutual Fund - Class A	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Since Inception	Average Annual Returns, Inception Date
Performance Measure Domain	14.73%	7.97%	10.81%	11.51%	Feb. 21, 1950
After Taxes on Distributions	13.44%	6.54%	9.70%
After Taxes on Distributions and Sale of Fund Shares	9.59%	6.02%	8.73%

Keep this supplement with your prospectus.