FIRST AMENDMENT TO

ETF DISTRIBUTION AGREEMENT

EFFECTIVE AS OF SEPTEMBER 20, 2021

This first amendment (this “Amendment”) to the ETF Distribution Agreement effective as of September 20, 2021 (the “New Agreement”), by and between American Century ETF Trust (the “Fund Company”) and Foreside Fund Services, LLC (the “Distributor”) is entered into as of January 1, 2022 (the “Effective Date”).

WHEREAS, the Fund Company and the Distributor (the “Parties”) desire to amend the New Agreement to reflect the addition of additional Funds;

WHEREAS, by its terms, the New Agreement incorporates by reference the terms of the ETF Distribution Agreement effective as December 13, 2017, as amended, by and between the Parties (the “Old Agreement”); and

WHEREAS, Section 8(d) of the Old Agreement requires that all amendments and modifications 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 ascribed to them in New Agreement.

2.That Exhibit A of the New Agreement is hereby deleted in its entirety and replaced by the Exhibit A attached hereto which reflects the addition of.

1.Except as expressly set forth herein, all of the provisions of the New Agreement and the Old Agreement shall remain unamended and in full force and effect.

2.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    

    Assistant Vice President                Vice President

EXHIBIT A

THE FUNDS

American Century Diversified Corporate Bond ETF

American Century Diversified Municipal Bond ETF

American Century Emerging Markets Bond ETF

American Century Focused Dynamic Growth ETF

American Century Focused Large Cap Value ETF

American Century Low Volatility ETF

American Century Mid Cap Growth Impact ETF

American Century Multisector Income ETF

American Century Quality Convertible Securities ETF

American Century Quality Diversified International ETF

American Century Quality Preferred ETF

American Century Select High Yield ETF

American Century STOXX U.S. Quality Value ETF

American Century STOXX U.S. Quality Growth ETF

American Century Sustainable Equity ETF

American Century Sustainable Growth ETF

Avantis Core Fixed Income ETF

Avantis Core Municipal Fixed Income ETF

Avantis Emerging Markets Equity ETF

Avantis Emerging Markets Value ETF

Avantis International Equity ETF

Avantis International Large Cap Value ETF

Avantis International Small Cap Value ETF

Avantis Real Estate ETF

Avantis Short-Term Fixed Income ETF

Avantis U.S. Equity ETF

Avantis U.S. Large Cap Value ETF

Avantis U.S. Small Cap Equity ETF

Avantis U.S. Small Cap Value ETF