VALQ / American Century ETF Trust - American Century U.S. Quality Value ETF - Документы SEC, Годовой отчет, Доверенное заявление

American Century ETF Trust - American Century US Quality Value ETF
US ˙ ARCA ˙ US0250722081

Основная статистика
LEI 5493006IKK34YJD98183
CIK 1710607
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to American Century ETF Trust - American Century U.S. Quality Value ETF
SEC Filings (Chronological Order)
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June 2, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

DEFA14A 1 acetftdefa14a6225.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (a

May 20, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

May 6, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

May 1, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

April 29, 2025 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES NYSE Arca hereby notifies the SEC of its intention to remove the entire class of the stated securities from listing and registration on the Exchange at the opening of business on May 12, 2025, pursuant to the provisions of Rule 12d2-2 (a).

April 25, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

April 21, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Defin

April 16, 2025 CORRESP

April 16, 2025

April 16, 2025 VIA EDGAR Ms. Anu Dubey Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Dubey: Please find below our response to the comments that you provided on April 15, 2025, regarding the Registrant’s preliminary proxy statement on Sched

April 11, 2025 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

April 10, 2025 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: x Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defin

March 21, 2025 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

8-A12B 1 acetft032120258-a12bx1avuq.htm 8-A12B UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Emp

December 18, 2024 CORRESP

December 18, 2024

December 18, 2024 VIA EDGAR Ms. Karen Rossotto Division of Investment Management U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Rossotto: This letter responds to the comments you provided on August 20, 2024, relating to Post-Effective Amendment No. 89 to the Registrant

October 3, 2024 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES NYSE Arca hereby notifies the SEC of its intention to remove the entire class of the stated securities from listing and registration on the Exchange at the opening of business on October 14, 2024, pursuant to the provisions of Rule 12d2-2 (a).

July 16, 2024 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

June 10, 2024 CORRESP

June 10, 2024

June 10, 2024 VIA EDGAR Ms. Rebecca Marquigny Division of Investment Management U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Marquigny: This letter responds to the comments you provided on May 6, 2024, relating to Post-Effective Amendment No. 87 to the Registrant’s R

May 3, 2024 CORRESP

APPENDIX A

VIA EDGAR May 3, 2024 Ms. Mindy Rotter U.S. Securities and Exchange Commission 100 F Street, NE Washington, DC 20549-2000 Re: American Century Asset Allocation Portfolios, Inc. (File No. 811-21591) American Century California Tax-Free & Municipal Funds (File No. 811-03706) American Century ETF Trust (File No. 811-23305) (collectively, the “Registrants”) Dear Ms. Rotter: This letter responds to the

May 3, 2024 CORRESP

APPENDIX A

VIA EDGAR May 3, 2024 Ms. Mindy Rotter U.S. Securities and Exchange Commission 100 F Street, NE Washington, DC 20549-2000 Re: American Century Asset Allocation Portfolios, Inc. (File No. 811-21591) American Century California Tax-Free & Municipal Funds (File No. 811-03706) American Century ETF Trust (File No. 811-23305) (collectively, the “Registrants”) Dear Ms. Rotter: This letter responds to the

March 18, 2024 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

February 5, 2024 SC 13G/A

AVEM / American Century ETF Trust - Avantis Emerging Markets Equity ETF / Savant Capital, LLC - SAVANT CAPITAL, LLC Passive Investment

SC 13G/A 1 avema220524.htm SAVANT CAPITAL, LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* AMERICAN CENTY ETF TR (Name of Issuer) AVANTIS EMGMKT (Title of Class of Securities) 025072604 (CUSIP Number) December 31, 2023 (Date of Event which Requires Filing of this Statement) Check the appropriate b

November 7, 2023 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

November 6, 2023 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

October 30, 2023 CORRESP

October 30, 2023

October 30, 2023 VIA EDGAR Mr. Raymond Be Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Mr. Be: This letter responds to the comments you provided on September 29, 2023, relating to Post-Effective Amendment No. 82 to the Registrant’s Registration St

October 19, 2023 25

As Filed with the U.S. Securities and Exchange Commission on October 19, 2023

As Filed with the U.S. Securities and Exchange Commission on October 19, 2023 1933 Act File No. 333-221045 1940 Act File No. 811-23305 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 25 NOTIFICATION OF REMOVAL FROM LISTING AND/OR REGISTRATION UNDER SECTION 12(b) OF THE SECURITIES EXCHANGE ACT OF 1934. American Century ETF Trust Cboe BZX Exchange, Inc. (Exact name of Is

October 19, 2023 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

September 22, 2023 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

July 17, 2023 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

June 26, 2023 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

March 13, 2023 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

February 6, 2023 SC 13G/A

AVEM / Avantis Emerging Markets Equity ETF / Savant Capital, LLC - SAVANT CAPITAL, LLC Passive Investment

SC 13G/A 1 avema120623.htm SAVANT CAPITAL, LLC UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* AMERICAN CENTY ETF TR (Name of Issuer) AVANTIS EMGMKT (Title of Class of Securities) 025072604 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statement) Check the appropriate b

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Select High Yield ETF (AHYB) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Select High Yield ETF (AHYB) November 30, 2022 American Century Select High Yield ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 95.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Convertible Securities ETF (QCON) November 30, 2022

NPORT-EX 2 adxyqualconvtsecetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Quality Convertible Securities ETF (QCON) November 30, 2022 American Century Quality Convertible Securities ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CONVERTIBLE BONDS — 72.6% Air Freight and Logistics — 0.6% Air Transport S

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Low Volatility ETF (LVOL) November 30, 2022

NPORT-EX 2 adxwlowvolatilityetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Low Volatility ETF (LVOL) November 30, 2022 American Century Low Volatility ETF - Schedule of Investments  NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.4% Aerospace and Defense — 4.1% General Dynamics Corp. 1,061 267,786 Lockheed Martin

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) November 30, 2022

NPORT-EX 2 acxmqualdiverintletf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) November 30, 2022 American Century Quality Diversified International ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.6% Australia — 3.7% Aristocrat Leisure Ltd. 38,9

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Large Cap Value ETF (AVLV) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Large Cap Value ETF (AVLV) November 30, 2022 Avantis U.S. Large Cap Value ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Aerospace and Defense — 0.2% BWX Technologies, Inc. 22,023 1,340,980 Air Freight and Logistics — 2.4% Expeditors International of Wa

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) November 30, 2022 American Century Focused Large Cap Value ETF - Schedule of Investments  NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund November 30, 2022

NPORT-EX 2 aczdavantisusequity.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund November 30, 2022 Avantis U.S. Equity Fund - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Aerospace and Defense — 1.2% AAR Corp.(1) 1,155 53,777 Aerojet Rocketdyne Holdings, Inc.(1) 3,621 188,292 AerSale

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible International Equity ETF (AVSD) November 30, 2022

NPORT-EX 2 ahjlavantrespintleqtyetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible International Equity ETF (AVSD) November 30, 2022 Avantis Responsible International Equity ETF- Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Australia — 7.5% 88 Energy Ltd.(1) 20,921 142 Accent Group Ltd

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) November 30, 2022

NPORT-EX 2 acz7focusdynamicgrowetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) November 30, 2022 American Century Focused Dynamic Growth ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.2% Aerospace and Defense — 0.5% Rocket Lab USA, Inc.(1) 168,527 706,

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income ETF November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income ETF November 30, 2022 Avantis Core Municipal Fixed Income ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Multisector Income ETF (MUSI) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Multisector Income ETF (MUSI) November 30, 2022 American Century Multisector Income ETF - Schedule of Investments  NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 41.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) November 30, 2022

NPORT-EX 2 acxsavantisintlequityetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) November 30, 2022 Avantis International Equity ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.6% Australia — 7.5% 29Metals Ltd.(1) 53,312 89,751 Accent Group Ltd. 64,983 80,214 Adai

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income Fund November 30, 2022

NPORT-EX 2 adw8avantisstfixedinc.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income Fund November 30, 2022 Avantis Short-Term Fixed Income Fund - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 65.8% Aerospace and Defense — 0.6% General Dynamics Corp., 3.50%, 5/15/25 42,000 41,139 Hun

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund November 30, 2022 Avantis U.S. Small Cap Value Fund - Schedule of Investments  NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.9% Aerospace and Defense — 0.3% AAR Corp.(1) 9,381 436,779 AerSale Corp.(1) 7,640 121,094 Moog, Inc., Class A 8,633 751,330 1,309,203 Air

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible U.S. Equity ETF (AVSU) November 30, 2022

NPORT-EX 2 ahjiavantrespuseqtyetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible U.S. Equity ETF (AVSU) November 30, 2022 Avantis Responsible U.S. Equity ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.6% Aerospace and Defense — 0.3% AerSale Corp.(1) 145 2,298 Archer Aviation, Inc., Cl

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) November 30, 2022

NPORT-EX 2 acxqavantisusequityetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) November 30, 2022 Avantis U.S. Equity ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 1.2% AAR Corp.(1) 5,944 276,753 Aerojet Rocketdyne Holdings, Inc.(1) 28,538 1,48

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) November 30, 2022 American Century Mid Cap Growth Impact ETF - Schedule of Investments  NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Growth ETF (ESGY) November 30, 2022

NPORT-EX 2 ahg8sustainablegrowthetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Growth ETF (ESGY) November 30, 2022 American Century Sustainable Growth ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Aerospace and Defense — 0.6% Lockheed Martin Corp. 85 41,241 Air Freigh

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Large Cap Value Fund November 30, 2022

NPORT-EX 2 ahjravantisuslgcapvalue.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Large Cap Value Fund November 30, 2022 Avantis U.S. Large Cap Value Fund - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.6% Aerospace and Defense — 0.1% BWX Technologies, Inc. 1,427 86,890 Air Freight and Logistics

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Inflation Focused Equity ETF (AVIE) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Inflation Focused Equity ETF (AVIE) November 30, 2022 Avantis Inflation Focused Equity ETF - Schedule of Investments  NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Real Estate ETF (AVRE) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Real Estate ETF (AVRE) November 30, 2022 Avantis Real Estate ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED)  Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) November 30, 2022

NPORT-EX 2 acxwavantintlsmcapvaletf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) November 30, 2022 Avantis International Small Cap Value ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.5% Australia — 9.8% 29Metals Ltd.(1) 599,947 1,010,014 Accent Group Lt

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) November 30, 2022

NPORT-EX 2 acoysustainableequityetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) November 30, 2022 American Century Sustainable Equity ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.6% Aerospace and Defense — 1.3% Lockheed Martin Corp. 2,996 1,453,629 Air

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income Fund November 30, 2022

NPORT-EX 2 adw7avantcoremunifixinc.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income Fund November 30, 2022 Avantis Core Municipal Fixed Income Fund - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.3% Alabama — 2.5% Alabama Federal Aid Highway Finance Authority Rev., 5.0

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund November 30, 2022

NPORT-EX 2 aczeavantisintlequity.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund November 30, 2022 Avantis International Equity Fund - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.9% Australia — 7.4% 29Metals Ltd.(1) 7,709 12,978 Accent Group Ltd. 11,453 14,137 Adairs Ltd.(1)

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Value ETF (AVES) November 30, 2022

NPORT-EX 2 ahjeavantemergmktvaletf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Value ETF (AVES) November 30, 2022 Avantis Emerging Markets Value ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Brazil — 6.3% 3R Petroleum Oleo E Gas SA(1) 4,700 33,375 Aliansce Sonae Shopping C

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) November 30, 2022 Avantis Core Fixed Income ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 62.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Growth ETF (QGRO) November 30, 2022

NPORT-EX 2 acxlstoxxusqualgrowetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Growth ETF (QGRO) November 30, 2022 American Century STOXX® U.S. Quality Growth ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.5% Aerospace and Defense — 0.3% HEICO Corp. 1,495 242,653 Ho

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Value ETF (VALQ) November 30, 2022 American Century STOXX U.S. Quality Value ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principa

NPORT-EX 2 acxgstoxxusqualvaletf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Value ETF (VALQ) November 30, 2022 American Century STOXX U.S. Quality Value ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.6% Aerospace and Defense — 1.3% General Dynamics Corp. 752 189,7

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Equity ETF (AVSC) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Equity ETF (AVSC) November 30, 2022 Avantis U.S. Small Cap Equity ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.9% Aerospace and Defense — 0.9% AAR Corp.(1) 2,132 99,266 AerSale Corp.(1) 1,148 18,196 Archer Aviation, Inc., Class A(1) 5,543 13,91

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) November 30, 2022 Avantis U.S. Small Cap Value ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 0.1% AAR Corp.(1) 5,861 272,888 AerSale Corp.(1) 106,954 1,695,221 Moog, Inc., Class A 35,611 3,099,225 5,06

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income Fund November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income Fund November 30, 2022 Avantis Core Fixed Income Fund - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 61.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® All Equity Markets ETF (AVGE) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® All Equity Markets ETF (AVGE) November 30, 2022 Avantis® All Equity Markets ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) UNDERLYING FUNDS(1) — 99.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Short Duration Strategic Income ETF (SDSI) November 30, 2022

NPORT-EX 2 ahlpshortdurationstrincetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Short Duration Strategic Income ETF (SDSI) November 30, 2022 American Century Short Duration Strategic Income ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 45.8% Aerospace and Defense — 0.2% Boeing Co.,

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund November 30, 2022 Avantis International Small Cap Value Fund - Schedule of Investments  NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Preferred ETF (QPFF) November 30, 2022

NPORT-EX 2 adxzqualpreferredetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Quality Preferred ETF (QPFF) November 30, 2022 American Century Quality Preferred ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) PREFERRED STOCKS — 83.9% Automobiles — 0.4% Ford Motor Co., 6.00% 4,404 104,155 Banks — 24.9% Bank

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Emerging Markets Bond ETF (AEMB) November 30, 2022

NPORT-EX 2 ahg7emergmrktbondetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Emerging Markets Bond ETF (AEMB) November 30, 2022 American Century Emerging Markets Bond ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 46.9% Brazil — 5.2% B2W Digital Lux Sarl, 4.375%, 12/20/30(1) 200,000 124

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) November 30, 2022

NPORT-EX 2 acxpdivermunibondetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) November 30, 2022 American Century Diversified Municipal Bond ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.4% Alabama — 1.0% Black Belt Energy Gas District Rev.,

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund November 30, 2022

NPORT-EX 2 aczfavantisemergmkteqty.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund November 30, 2022 Avantis Emerging Markets Equity Fund - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.2% Brazil — 6.0% 3R Petroleum Oleo E Gas SA(1) 18,200 129,240 Aeris Industria E Comercio

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Large Cap Value ETF (AVIV) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® International Large Cap Value ETF (AVIV) November 30, 2022 Avantis International Large Cap Value ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible Emerging Markets Equity ETF (AVSE) November 30, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible Emerging Markets Equity ETF (AVSE) November 30, 2022 Avantis Responsible Emerging Markets Equity ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) November 30, 2022

NPORT-EX 2 acxuavantemergmkteqtyetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) November 30, 2022 Avantis Emerging Markets Equity ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.9% Brazil — 6.4% 3R Petroleum Oleo E Gas SA(1) 210,466 1,494,536 Aeris Industria E

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) November 30, 2022

NPORT-EX 2 adu8avantisstfixedincetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) November 30, 2022 Avantis Short-Term Fixed Income ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 66.7% Aerospace and Defense — 1.1% General Dynamics Corp., 3.50%, 5/15/25 756,000 7

January 19, 2023 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) November 30, 2022

NPORT-EX 2 acxfdivercorpbondetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) November 30, 2022 American Century Diversified Corporate Bond ETF - Schedule of Investments NOVEMBER 30, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 98.1% Aerospace and Defense — 1.1% Lockheed Martin Corp., 5.25%

December 9, 2022 SC 13G

AVEM / Avantis Emerging Markets Equity ETF / Savant Capital, LLC - SAVANT CAPITAL, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 AMERICAN CENTY ETF TR (Name of Issuer) AVANTIS EMGMKT (Title of Class of Securities) 025072604 (CUSIP Number) November 30, 2022 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

October 11, 2022 8-A12B/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

October 7, 2022 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

September 23, 2022 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

September 14, 2022 CORRESP

September 14, 2022

September 14, 2022 VIA EDGAR Ms. Allison White Division of Investment Management U.S. Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. White: This letter responds to the comments you provided on August 1, 2022, relating to Post-Effective Amendment No. 73 to the Registrant’s Re

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Low Volatility ETF (LVOL) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Low Volatility ETF (LVOL) May 31, 2022 American Century Low Volatility ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income Fund May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income Fund May 31, 2022 Avantis Core Fixed Income Fund - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 69.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Preferred ETF (QPFF) May 31, 2022

NPORT-EX 2 adxzqualpreferredetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Quality Preferred ETF (QPFF) May 31, 2022 American Century Quality Preferred ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) PREFERRED STOCKS — 78.3% Automobiles — 0.5% Ford Motor Co., 6.00% 4,410 110,779 Banks — 25.4% Bank of America

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) May 31, 2022 American Century® Diversified Municipal Bond ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund May 31, 2022 Avantis U.S. Equity Fund - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.5% Aerospace and Defense — 0.9% AAR Corp.(1) 678 32,693 Axon Enterprise, Inc.(1) 257 26,050 Boeing Co.(1) 1,587 208,532 BWX Technologies, Inc. 3,560 182,272 Curtiss-Wri

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) May 31, 2022 American Century Quality Diversified International ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Equity ETF (AVSC) May 31, 2022

NPORT-EX 2 ahjhavantussmcapeqtyetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Equity ETF (AVSC) May 31, 2022 Avantis U.S. Small Cap Equity ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 0.9% AAR Corp.(1) 520 25,074 AerSale Corp.(1) 280 3,881 Astronics Corp

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund May 31, 2022 Avantis International Small Cap Value Fund - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund May 31, 2022 Avantis® U.S. Small Cap Value Fund - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.3% Aerospace and Defense — 0.4% AAR Corp.(1) 14,119 680,818 Moog, Inc., Class A 8,633 702,640 1,383,458 Air Freight and Logistics — 0.9% Air Transpor

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible International Equity ETF (AVSD) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible International Equity ETF (AVSD) May 31, 2022 Avantis Responsible International Equity ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Focused Large Cap Value ETF (FLV) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Focused Large Cap Value ETF (FLV) May 31, 2022 Focused Large Cap Value ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Value ETF (VALQ) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible Emerging Markets Equity ETF (AVSE) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible Emerging Markets Equity ETF (AVSE) May 31, 2022 Avantis Responsible Emerging Markets Equity ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Growth ETF (QGRO) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund May 31, 2022

NPORT-EX 2 aczfavantisemergmkteqty.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund May 31, 2022 Avantis® Emerging Markets Equity Fund - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.4% Brazil — 6.5% 3R Petroleum Oleo E Gas SA(1) 10,200 105,444 Aeris Industria E Comercio De Equip

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) May 31, 2022 Avantis® Short-Term Fixed Income ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 65.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) May 31, 2022 Avantis Core Fixed Income ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 62.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Growth ETF (ESGY) May 31, 2022

NPORT-EX 2 ahg8sustainablegrowthetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Growth ETF (ESGY) May 31, 2022 American Century Sustainable Growth ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.5% Air Freight and Logistics — 0.8% United Parcel Service, Inc., Class B 283 51,577

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Emerging Markets Bond ETF (AEMB) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Emerging Markets Bond ETF (AEMB) May 31, 2022 American Century Emerging Markets Bond ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 54.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) May 31, 2022 Avantis International Equity ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Multisector Income ETF (MUSI) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Multisector Income ETF (MUSI) May 31, 2022 American Century Multisector Income ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 43.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) May 31, 2022 Avantis® U.S. Equity ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 1.0% AAR Corp.(1) 2,071 99,864 Astronics Corp.(1) 2,546 26,733 Axon Enterprise, Inc.(1) 3,252 329,623 Boeing Co.(1) 9,507 1,249,220 BWX

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Real Estate ETF (AVRE) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Real Estate ETF (AVRE) May 31, 2022 Avantis Real Estate ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) May 31, 2022

NPORT-EX 2 acxuavantemergmkteqtyetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) May 31, 2022 Avantis® Emerging Markets Equity ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Brazil — 6.6% 3R Petroleum Oleo E Gas SA(1) 70,866 732,585 Aeris Industria E Comercio De

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Select High Yield ETF (AHYB) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Select High Yield ETF (AHYB) May 31, 2022 American Century Select High Yield ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 95.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) May 31, 2022 Avantis® U.S. Small Cap Value ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Aerospace and Defense — 0.3% AAR Corp.(1) 163,553 7,886,526 Moog, Inc., Class A 36,772 2,992,873 10,879,399 Air Freight and Logistics — 1.1%

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Large Cap Value ETF (AVLV) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Large Cap Value ETF (AVLV) May 31, 2022 Avantis® U.S. Large Cap Value ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Air Freight and Logistics — 2.1% FedEx Corp. 9,412 2,113,747 United Parcel Service, Inc., Class B 27,373 4,988,729 7,102,476 Auto Components

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income Fund May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income Fund May 31, 2022 Avantis Core Municipal Fixed Income Fund - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Value ETF (AVES) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Value ETF (AVES) May 31, 2022 Avantis Emerging Markets Value ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) May 31, 2022

NPORT-EX 2 acoysustainableequityetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) May 31, 2022 American Century® Sustainable Equity ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Aerospace and Defense — 1.2% Lockheed Martin Corp. 3,511 1,545,226 Air Freight a

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) May 31, 2022 American Century Diversified Corporate Bond ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 93.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) May 31, 2022 American Century® Focused Dynamic Growth ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income Fund May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income Fund May 31, 2022 Avantis Short-Term Fixed Income Fund - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 65.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Large Cap Value ETF (AVIV) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® International Large Cap Value ETF (AVIV) May 31, 2022 Avantis® International Large Cap Value ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income ETF May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income ETF May 31, 2022 Avantis® Core Municipal Fixed Income ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) May 31, 2022 Avantis® International Small Cap Value ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Convertible Securities ETF (QCON) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Convertible Securities ETF (QCON) May 31, 2022 American Century Quality Convertible Securities ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CONVERTIBLE BONDS — 66.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) May 31, 2022 American Century Mid Cap Growth Impact ETF - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 97.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund May 31, 2022 Avantis International Equity Fund - Schedule of Investments MAY 31, 2022 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 28, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible U.S. Equity ETF (AVSU) May 31, 2022

American Century Investments® Quarterly Portfolio Holdings Avantis® Responsible U.

June 17, 2022 N-18F1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-18F-1 NOTIFICATION OF ELECTION PURSUANT TO RULE 18f-1 UNDER THE INVESTMENT COMPANY ACT OF 1940. AMERICAN CENTURY ETF TRUST NOTIFICATION OF ELECTION

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-18F-1 NOTIFICATION OF ELECTION PURSUANT TO RULE 18f-1 UNDER THE INVESTMENT COMPANY ACT OF 1940. AMERICAN CENTURY ETF TRUST - NOTIFICATION OF ELECTION The undersigned registered open-end investment company hereby notifies the Securities and Exchange Commission that it elects to commit one of its series, Avantis U.S. Larg

May 18, 2022 CORRESP

VIA EDGAR

VIA EDGAR May 18, 2022 Ms. Allison White U.S. Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549 Re: American Century ETF Trust (File Nos. 333-221045; 811-23305) Dear Ms. White: This letter responds to the comment you provided during our phone conversation on April 21, 2022, regarding your review of the 485(a) filing applicable to Avantis U.S. Large Cap Value Fund (Post-Ef

March 25, 2022 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

March 25, 2022 COVER

American Century Investments P.O. Box 410141, 4500 Main Street 1-800-345-2021 or 816-531-5575 Kansas City, MO 64141-0141 www.americancentury.com

March 25, 2022 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) 1933 Act File No. 333-221045, Post-Effective Amendment No. 71 and 1940 Act File No. 811-23305, Amendment No. 73 (collectively, the “Amendment”) Ladies and Gentlemen: Pursuant to Section 101(a) of Regulation S-T and Rule 485(a) under the Securities Act of

March 14, 2022 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

February 28, 2022 CORRESP

February 28, 2022

February 28, 2022 VIA EDGAR Ms. Alison White Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. White: This letter responds to the comments you provided on January 12, 2022, relating to Post-Effective Amendment No. 68 to the Registrant’s Regist

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Multisector Income ETF (MUSI) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Multisector Income ETF (MUSI) November 30, 2021 American Century Multisector Income ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 57.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) November 30, 2021 American Century Diversified Corporate Bond ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 95.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund November 30, 2021 Avantis U.S. Small Cap Value Fund - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.3% Aerospace and Defense — 0.1% AAR Corp.(1) 11,170 364,812 Kaman Corp. 1,096 40,552 405,364 Air Freight and Logistics — 0.9% Air Transport

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Low Volatility ETF (LVOL) November 30, 2021

NPORT-EX 2 adxwaclowvoletf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Low Volatility ETF (LVOL) November 30, 2021 American Century Low Volatility ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.7% Aerospace and Defense — 1.0% General Dynamics Corp. 360 68,029 Auto Components — 0.5% Ge

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) November 30, 2021 Avantis Core Fixed Income ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 62.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) November 30, 2021 American Century Quality Diversified International ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income Fund November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income Fund November 30, 2021 Avantis Core Municipal Fixed Income Fund - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) November 30, 2021

NPORT-EX 2 acoyacsustainableequityetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) November 30, 2021 American Century Sustainable Equity ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.6% Aerospace and Defense — 0.8% Lockheed Martin Corp. 3,636 1,211,952 Ai

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund November 30, 2021 Avantis U.S. Equity Fund - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.4% Aerospace and Defense — 0.8% AAR Corp.(1) 296 9,667 Aerojet Rocketdyne Holdings, Inc. 361 15,177 AeroVironment, Inc.(1) 151 12,195 Astronics Corp.(1) 327 3

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) November 30, 2021 Avantis U.S. Small Cap Value ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.4% Aerospace and Defense — 0.2% AAR Corp.(1) 70,276 2,295,214 Hexcel Corp.(1) 41,819 2,148,660 Kaman Corp. 6,800 251,600 4,695,474 Air

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Growth ETF (QGRO) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) November 30, 2021 American Century Focused Large Cap Value ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) November 30, 2021

NPORT-EX 2 acxuavantisemgmktequetf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) November 30, 2021 Avantis Emerging Markets Equity ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 100.2% Brazil — 4.7% 3R PETROLEUM OLEO E GAS SA(1) 13,366 64,740 Aeris Industria E Com

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) November 30, 2021 Avantis International Equity ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income Fund November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income Fund November 30, 2021 Avantis Short-Term Fixed Income Fund - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 65.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund November 30, 2021 Avantis International Small Cap Value Fund - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) November 30, 2021 .

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Growth ETF (ESGY) November 30, 2021

NPORT-EX 2 ahg8acsustainablegrowthetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Growth ETF (ESGY) November 30, 2021 American Century Sustainable Growth ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.8% Air Freight and Logistics — 0.7% United Parcel Service, Inc., Class B

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) November 30, 2021

NPORT-EX 2 acz7acfocdyngrwthetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) November 30, 2021 American Century Focused Dynamic Growth ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.5% Aerospace and Defense — 0.4% Rocket Lab USA, Inc.(1) 58,731 931,474

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) November 30, 2021 Avantis U.S. Equity ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 0.9% AAR Corp.(1) 2,071 67,638 Aerojet Rocketdyne Holdings, Inc. 5,457 229,412 AeroVironment, Inc.(1) 343 27,701 Astronics Cor

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Preferred ETF (QPFF) November 30, 2021

NPORT-EX 2 adxzacqualprefetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Quality Preferred ETF (QPFF) November 30, 2021 American Century Quality Preferred ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) PREFERRED STOCKS — 77.1% Automobiles — 0.5% Ford Motor Co., 6.00% 2,943 78,431 Banks — 24.2% Bank of A

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Emerging Markets Bond ETF (AEMB) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Emerging Markets Bond ETF (AEMB) November 30, 2021 American Century Emerging Markets Bond ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 62.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income Fund November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income Fund November 30, 2021 Avantis Core Fixed Income Fund - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 61.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Value ETF (AVES) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Value ETF (AVES) November 30, 2021 Avantis Emerging Markets Value ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Large Cap Value ETF (AVIV) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Large Cap Value ETF (AVIV) November 30, 2021 Avantis International Large Cap Value ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income ETF (AVMU) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income ETF (AVMU) November 30, 2021 Avantis Core Municipal Fixed Income ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) November 30, 2021 Avantis International Small Cap Value ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Select High Yield ETF (AHYB) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Select High Yield ETF (AHYB) November 30, 2021 American Century Select High Yield ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 94.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Value ETF (VALQ) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund November 30, 2021 Avantis International Equity Fund - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 97.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Convertible Securities ETF (QCON) November 30, 2021

NPORT-EX 2 adxyacqualconvsecetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Quality Convertible Securities ETF (QCON) November 30, 2021 American Century Quality Convertible Securities ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CONVERTIBLE BONDS — 65.6% Airlines — 1.2% American Airlines Group, Inc.,

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Large Cap Value ETF (AVLV) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Large Cap Value ETF (AVLV) November 30, 2021 Avantis U.S. Large Cap Value ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 0.2% Huntington Ingalls Industries, Inc. 102 18,106 Textron, Inc. 242 17,134 35,240 Air Freight and Logistic

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) November 30, 2021 American Century Mid Cap Growth Impact ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 97.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund November 30, 2021

NPORT-EX 2 aczfavantisemrgngmktseqty.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund November 30, 2021 Avantis Emerging Markets Equity Fund - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.2% Brazil — 4.8% 3R PETROLEUM OLEO E GAS SA(1) 4,800 23,249 Aeris Industria E Comercio

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) November 30, 2021 Avantis Short-Term Fixed Income ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 65.

January 24, 2022 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Real Estate ETF (AVRE) November 30, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Real Estate ETF (AVRE) November 30, 2021 Avantis Real Estate ETF - Schedule of Investments NOVEMBER 30, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 10, 2022 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

December 20, 2021 CORRESP

December 20, 2021

CORRESP 1 filename1.htm December 20, 2021 VIA EDGAR Ms. Alison White Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. White: This letter responds to your comments that we discussed on November 23, 2021, relating to Post-Effective Amendment No

November 15, 2021 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

October 13, 2021 COVER

October 13, 2021

October 13, 2021 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549-4720 Re: American Century ETF Trust (the ?Registrant?) 1933 Act File No. 333-221045, Post-Effective Amendment No. 65 and 1940 Act File No. 811-23305, Amendment No. 67 (collectively, the ?Amendment?) Ladies and Gentlemen: Pursuant to Section 101(a) of Regulation S-T and Rule 485(a) under the Securities Act o

September 28, 2021 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

September 21, 2021 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

September 10, 2021 CORRESP

September 10, 2021

September 10, 2021 VIA EDGAR Ms. Holly Hunter-Ceci Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the ?Registrant?) File Nos. 333-221045; 811-23305 Dear Ms. Hunter-Ceci: This letter responds to your comment that we discussed on September 9, 2021, relating to Post-Effective Amendment No. 61 to the R

September 8, 2021 CORRESP

September 8, 2021

CORRESP 1 filename1.htm September 8, 2021 VIA EDGAR Ms. Holly Hunter-Ceci Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Hunter-Ceci: This letter responds to your comments that we discussed on August 4, 2021, relating to Post-Effective Amen

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income Fund May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income Fund May 28, 2021 Avantis Short-Term Fixed Income Fund - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 54.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income Fund May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income Fund May 28, 2021 Avantis Core Fixed Income Fund - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 62.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Low Volatility ETF (LVOL) May 28, 2021

NPORT-EX 2 adxwaclowvoletf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Low Volatility ETF (LVOL) May 28, 2021 American Century Low Volatility ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.6% Airlines — 1.0% Alaska Air Group, Inc.(1) 368 25,465 Southwest Airlines Co.(1) 430 26,428 51,893 A

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) May 28, 2021

NPORT-EX 2 acoyacsustainableequityetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) May 28, 2021 American Century Sustainable Equity ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.6% Aerospace and Defense — 1.0% Lockheed Martin Corp. 3,978 1,520,392 Air Freight

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) May 28, 2021

NPORT-EX 2 acxuavantisemegmktequietf.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) May 28, 2021 Avantis Emerging Markets Equity ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.9% Brazil — 5.8% AES Brasil Energia SA 100,200 273,970 Aliansce Sonae Shopping Centers SA 4

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Value ETF (VALQ) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) May 28, 2021 American Century Focused Large Cap Value ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund May 28, 2021 Avantis International Small Cap Value Fund - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) May 28, 2021 American Century Diversified Municipal Bond ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 99.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) May 28, 2021 American Century Quality Diversified International ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) May 28, 2021 American Century Mid Cap Growth Impact ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 97.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) May 28, 2021 Avantis Short-Term Fixed Income ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 54.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund May 28, 2021 Avantis U.S. Small Cap Value - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.1% Aerospace and Defense — 0.3% Hexcel Corp.(1) 11,321 673,147 Air Freight and Logistics — 0.6% Air Transport Services Group, Inc.(1) 14,330 355,957 Atlas

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) May 28, 2021 Avantis International Equity ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) May 28, 2021 Avantis Core Fixed Income ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 62.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund May 28, 2021 Avantis U.S. Equity Fund - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 1.2% AAR Corp.(1) 296 12,358 Aerojet Rocketdyne Holdings, Inc. 361 17,490 AeroVironment, Inc.(1) 151 16,554 Astronics Corp.(1) 327 5,546 Axon

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) May 28, 2021 Avantis U.S. Small Cap Value ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 0.3% AAR Corp.(1) 3,487 145,582 Hexcel Corp.(1) 64,811 3,853,662 3,999,244 Air Freight and Logistics — 0.7% Air Transp

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income ETF (AVMU) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income ETF (AVMU) May 28, 2021 Avantis Core Municipal Fixed Income ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund May 28, 2021

NPORT-EX 2 aczfavantisemgmktequity.htm PART F American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund May 28, 2021 Avantis Emerging Markets Equity Fund - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.0% Brazil — 5.7% AES Brasil Energia SA 9,500 25,975 Aliansce Sonae Shopping Centers SA 4,600 26,53

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) May 28, 2021

NPORT-EX 2 acz7acfocdyngrwthetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) May 28, 2021 American Century Focused Dynamic Growth ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 1.5% Lockheed Martin Corp. 8,396 3,208,951 Automobiles

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) May 28, 2021 Avantis International Small Cap Value ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) May 28, 2021 Avantis U.S. Equity ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 1.1% AAR Corp.(1) 2,071 86,464 Aerojet Rocketdyne Holdings, Inc. 5,457 264,392 AeroVironment, Inc.(1) 800 87,704 Astronics Corp.(1) 2,54

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Preferred ETF (QPFF) May 28, 2021

NPORT-EX 2 adxzacqualprefetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® Quality Preferred ETF (QPFF) May 28, 2021 American Century Quality Preferred ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) PREFERRED STOCKS — 70.4% Automobiles — 0.5% Ford Motor Co., 6.00% 2,784 74,472 Banks — 23.1% Bank of America Cor

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) May 28, 2021 American Century Diversified Corporate Bond ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 96.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Growth ETF (QGRO) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income Fund May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Municipal Fixed Income Fund May 28, 2021 Avantis Core Municipal Fixed Income Fund - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund May 28, 2021

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund May 28, 2021 Avantis International Equity Fund - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

July 26, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Convertible Securities ETF (QCON) May 28, 2021

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Convertible Securities ETF (QCON) May 28, 2021 American Century Quality Convertible Securities ETF - Schedule of Investments MAY 28, 2021 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CONVERTIBLE BONDS — 72.

June 25, 2021 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of regis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

June 21, 2021 COVER

June 21, 2021

June 21, 2021 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) 1933 Act File No. 333-221045, Post-Effective Amendment No. 61 and 1940 Act File No. 811-23305, Amendment No. 63 (collectively, the “Amendment”) Ladies and Gentlemen: Pursuant to Section 101(a) of Regulation S-T and Rule 485(a) under the Securities Act of 1

March 29, 2021 CORRESP

Appendix A

CORRESP 1 filename1.htm VIA EDGAR March 29, 2021 Ms. Mindy Rotter U.S. Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549 Re: American Century Asset Allocation Portfolios, Inc. (File No. 811-21591) American Century California Tax Free & Municipal Funds (File No. 811-03706) American Century ETF Trust (811-23305) Dear: Ms. Rotter This letter responds to the comments you prov

February 12, 2021 8-A12B

- 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) November 30, 2020 American Century Quality Diversified International ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) November 30, 2020 American Century Focused Large Cap Value ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value Fund November 30, 2020 Avantis U.S. Small Cap Value - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.2% Aerospace and Defense — 0.7% AAR Corp. 147 4,170 Astronics Corp.(1) 1,856 21,196 Hexcel Corp. 11,374 563,240 Maxar Technologies, Inc. 3,007 83

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity Fund November 30, 2020 Avantis International Equity Fund - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity Fund November 30, 2020 Avantis U.S. Equity - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.3% Aerospace and Defense — 1.1% AAR Corp. 296 8,397 Aerojet Rocketdyne Holdings, Inc.(1) 361 13,512 AeroVironment, Inc.(1) 75 6,404 Astronics Corp.(1) 1 11 Axon En

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value ETF (AVDV) November 30, 2020 Avantis International Small Cap Value ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity ETF (AVEM) November 30, 2020 Avantis Emerging Markets Equity ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 100.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® Short-Term Fixed Income ETF (AVSF) November 30, 2020 Avantis Short-Term Fixed Income ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 55.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Growth ETF (QGRO) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Small Cap Value ETF (AVUV) November 30, 2020 Avantis U.S. Small Cap Value ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 0.3% AAR Corp. 1,999 56,712 Hexcel Corp. 22,881 1,133,067 1,189,779 Air Freight and Logistics — 0.9% Air Tra

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) November 30, 2020 American Century® Diversified Municipal Bond ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) November 30, 2020 American Century Diversified Corporate Bond ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 94.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® Core Fixed Income ETF (AVIG) November 30, 2020 Avantis Core Fixed Income ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 58.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings American Century® Sustainable Equity ETF (ESGA) November 30, 2020 American Century Sustainable Equity ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century Focused Dynamic Growth ETF (FDG) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings American Century Focused Dynamic Growth ETF (FDG) November 30, 2020 American Century Focused Dynamic Growth ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® Emerging Markets Equity Fund November 30, 2020 Avantis Emerging Markets Equity Fund - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® U.S. Equity ETF (AVUS) November 30, 2020 Avantis U.S. Equity ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 1.2% AAR Corp. 1,943 55,123 Aerojet Rocketdyne Holdings, Inc.(1) 5,288 197,930 AeroVironment, Inc.(1) 315 26,898 Astronics Cor

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® International Equity ETF (AVDE) November 30, 2020 Avantis International Equity ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) November 30, 2020

American Century Investments® Quarterly Portfolio Holdings American Century® Mid Cap Growth Impact ETF (MID) November 30, 2020 American Century Mid Cap Growth Impact ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund November 30, 2020

American Century Investments® Quarterly Portfolio Holdings Avantis® International Small Cap Value Fund November 30, 2020 Avantis International Small Cap Value - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

January 25, 2021 NPORT-EX

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Value ETF (VALQ) November 30, 2020

NPORT-EX 2 acxgstoxxusqualityvalueetf.htm PART F American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.S. Quality Value ETF (VALQ) November 30, 2020 American Century STOXX®U.S. Quality Value ETF - Schedule of Investments NOVEMBER 30, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.5% Aerospace and Defense — 1.7% General Dynamics Corp. 2,11

January 11, 2021 8-A12B

- 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

December 14, 2020 CORRESP

-

December 14, 2020 VIA EDGAR Ms. Elena Stojic Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Stojic: This letter responds to your comments that we discussed on December 11, 2020, relating to Post-Effective Amendment No. 55 to the Registrant’

December 7, 2020 8-A12B

- 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

December 4, 2020 CORRESP

-

December 4, 2020 VIA EDGAR Ms. Elena Stojic Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Stojic: This letter responds to your comments that we discussed on October 19, 2020, relating to Post-Effective Amendment No. 55 to the Registrant’s

November 4, 2020 N-18F1

- N-18F1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-18F-1 NOTIFICATION OF ELECTION PURSUANT TO RULE 18f-1 UNDER THE INVESTMENT COMPANY ACT OF 1940. AMERICAN CENTURY ETF TRUST - NOTIFICATION OF ELECTION The undersigned registered open-end investment company hereby notifies the Securities and Exchange Commission that it elects to commit three of its series, Avantis Core Fi

October 9, 2020 8-A12B

- 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

September 8, 2020 CORRESP

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September 8, 2020 VIA EDGAR Ms. Elena Stojic Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re:American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Stojic: This letter responds to your comment that we discussed on September 4, 2020, relating to Post-Effective Amendment No. 53 to the Registrant’s

September 4, 2020 COVER

September 4, 2020

September 4, 2020 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549-4720 Re: American Century ETF Trust (the ?Registrant?) 1933 Act File No. 333-221045, Post-Effective Amendment No. 55 and 1940 Act File No. 811-23305, Amendment No. 57 (collectively, the ?Amendment?) Ladies and Gentlemen: Pursuant to Section 101(a) of Regulation S-T and Rule 485(a) under the Securities Act

September 1, 2020 CORRESP

-

September 1, 2020 VIA EDGAR Ms. Elena Stojic Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Stojic: This letter responds to your comments that we discussed on July 24, 2020, relating to Post-Effective Amendment No. 53 to the Registrant’s Re

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ U.S. Small Cap Value Fund May 31, 2020 Avantis U.S. Small Cap Value - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.0% Aerospace and Defense — 1.2% Astronics Corp.(1) 1,856 16,945 Hexcel Corp. 8,440 305,444 Maxar Technologies, Inc. 3,007 45,315 Spirit AeroSystems Holding

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings AvantisTM International Equity Fund May 31, 2020 Avantis International Equity Fund - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 97.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ International Small Cap Value Fund May 31, 2020 Avantis International Small Cap Value - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ U.S. Equity ETF (AVUS) May 31, 2020 Avantis U.S. Equity ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.8% Aerospace and Defense — 1.3% AAR Corp. 1,635 32,978 Aerojet Rocketdyne Holdings, Inc.(1) 4,055 177,812 AeroVironment, Inc.(1) 243 17,212 Astronics Corp.(1) 755

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ International Small Cap Value ETF (AVDV) May 31, 2020 Avantis International Small Cap Value ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ Emerging Markets Equity ETF (AVEM) May 31, 2020 Avantis Emerging Markets Equity ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ U.S. Equity Fund May 31, 2020 Avantis U.S. Equity - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 97.7% Aerospace and Defense — 1.2% AAR Corp. 38 767 Aerojet Rocketdyne Holdings, Inc.(1) 361 15,830 AeroVironment, Inc.(1) 75 5,312 Astronics Corp.(1) 34 311 Axon Enterprise, I

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ Emerging Markets Equity Fund May 31, 2020 Avantis Emerging Markets Equity Fund - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 98.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings American Century® Quality Diversified International ETF (QINT) May 31, 2020 American Century Quality Diversified International ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Dynamic Growth ETF (FDG) May 31, 2020 American Century Focused Dynamic Growth ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ U.S. Small Cap Value ETF (AVUV) May 31, 2020 Avantis U.S. Small Cap Value ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.9% Aerospace and Defense — 0.4% AAR Corp. 4,385 88,445 Aerojet Rocketdyne Holdings, Inc.(1) 9 395 Hexcel Corp. 11,421 413,326 Spirit AeroSystems

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings American Century® STOXX® U.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings Avantis™ International Equity ETF (AVDE) May 31, 2020 Avantis International Equity ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Municipal Bond ETF (TAXF) May 31, 2020 American Century Diversified Municipal Bond ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) MUNICIPAL SECURITIES — 98.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings American Century® Focused Large Cap Value ETF (FLV) May 31, 2020 American Century Focused Large Cap Value ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) COMMON STOCKS — 99.

July 23, 2020 NPORT-EX

- PART F

American Century Investments® Quarterly Portfolio Holdings American Century® Diversified Corporate Bond ETF (KORP) May 31, 2020 American Century Diversified Corporate Bond ETF - Schedule of Investments MAY 31, 2020 (UNAUDITED) Shares/ Principal Amount ($) Value ($) CORPORATE BONDS — 91.

July 10, 2020 8-A12B

- 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 American Century ETF Trust (Exact name of registrant as specified in its charter) Delaware See below (State of incorporation or organization) (IRS Employer Identification No.) 4500 Main, Kansas Cit

June 10, 2020 COVER

June 10, 2020

June 10, 2020 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) 1933 Act File No. 333-221045, Post-Effective Amendment No. 53 and 1940 Act File No. 811-23305, Amendment No. 55 (collectively, the “Amendment”) Ladies and Gentlemen: Pursuant to Section 101(a) of Regulation S-T and Rule 485(a) under the Securities Act of 1

June 2, 2020 CORRESP

June 2, 2020

June 2, 2020 VIA EDGAR Ms. Elena Stojic Division of Investment Management U.S. Securities and Exchange Commission 100 F Street NE Washington, DC 20549-4720 Re: American Century ETF Trust (the “Registrant”) File Nos. 333-221045; 811-23305 Dear Ms. Stojic: This letter responds to your comments that we discussed on May 29, 2020, relating to Post-Effective Amendment No. 51 to the Registrant’s Registra

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