EIGHTH AMENDMENT TO

ETF DISTRIBUTION AGREEMENT

This eighth amendment (“Amendment”) to the ETF Distribution Agreement (the “Agreement”) dated as of December 13, 2017 by and between American Century ETF Trust (“Trust”) and Foreside Fund Services, LLC (“Foreside”) is entered into as of September 10, 2020 (the “Effective Date”).

WHEREAS, the Trust and Foreside (the “Parties”) desire to amend Exhibit A of the Agreement to reflect the addition of three Funds; and

WHEREAS, Section 8(d) of the Agreement requires that all amendments and modifications to the Agreement be in writing and executed by the Parties.

NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereby agree as follows:

1. Capitalized terms not otherwise defined herein shall have the meanings set forth in Agreement.

2. Exhibit A of the Agreement is hereby deleted in its entirety and replaced by the Exhibit A attached hereto which reflects the addition of Avantis Core Fixed Income ETF, Avantis Short-Term Fixed Income ETF, and Avantis Core Municipal Fixed Income ETF.

3. Except as expressly amended hereby, all of the provisions of the Agreement shall remain unamended and in full force and effect to the same extent as if fully set forth herein.

4. This Amendment shall be governed by, and the provisions of this Amendment shall be construed and interpreted under and in accordance with, the laws of the State of Delaware.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed in their names and on their behalf by and through their duly authorized officers, as of the Effective Date.

American Century ETF Trust        Foreside Fund Services, LLC

By: /s/ Ryan L. Blaine                By: /s/ Mark A. Fairbanks

Ryan L. Blaine            Mark A. Fairbanks, Vice President        Assistant Vice President            

EXHIBIT A

As of September 10, 2020

American Century Diversified Corporate Bond ETF

American Century Diversified Municipal Bond ETF

American Century Quality Diversified International ETF

American Century STOXX U.S. Quality Value ETF

American Century STOXX U.S. Quality Growth ETF

Avantis U.S. Equity ETF

Avantis International Equity ETF

Avantis Emerging Markets Equity ETF

Avantis U.S. Small Cap Value ETF

Avantis International Small Cap Value ETF

American Century Focused Dynamic Growth ETF

American Century Focused Large Cap Value ETF

American Century Mid Cap Growth Impact ETF

American Century Sustainable Equity ETF

Avantis Core Fixed Income ETF

Avantis Short-Term Fixed Income ETF

Avantis Core Municipal Fixed Income ETF