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Oct. 24, 2019
Avantis International Small Cap Value ETF | Avantis International Small Cap Value ETF
Avantis™ International Small Cap Value ETF
American Century ETF Trust
Summary Prospectus and Prospectus Supplement
Avantis™ International Small Cap Value ETF
 
Supplement dated October 24, 2019
Summary Prospectus dated September 26, 2019 and Prospectus dated September 9, 2019

The following replaces the last sentence of the third paragraph under Principal Investment Strategies on page 2 of the summary prospectus and page 2 of the prospectus.
Though capitalizations will change from time to time, as of July 31, 2019, the total market capitalization of the largest company in the index was $7.7 billion.
Avantis International Small Cap Value Fund | Avantis International Small Cap Value Fund
Avantis™ International Small Cap Value Fund
American Century ETF Trust
Prospectus Supplement
Avantis™ International Small Cap Value Fund

 
Supplement dated October 24, 2019
Prospectus dated September 9, 2019

The following replaces the last sentence of the third paragraph under Principal Investment Strategies on page 2 of the prospectus.
Though capitalizations will change from time to time, as of July 31, 2019, the total market capitalization of the largest company in the index was $7.7 billion.