As Filed with the U.S. Securities and Exchange Commission on June 16, 2023

1933 Act File No. 333-221045

1940 Act File No. 811-23305

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549
__________________
FORM N-1A
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REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	☒
Pre-Effective Amendment No.	☐
Post-Effective Amendment No. 80	☒
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	☒
Amendment No. 82	☒
(Check appropriate box or boxes.)
__________________
American Century ETF Trust
__________________
4500 MAIN STREET, KANSAS CITY, MISSOURI 64111   (Address of Principal Executive Offices)                  (Zip Code)
REGISTRANT’S TELEPHONE NUMBER, INCLUDING AREA CODE: (816) 531-5575
JOHN PAK 4500 MAIN STREET, KANSAS CITY, MISSOURI 64111 (Name and Address of Agent for Service)
Approximate Date of Proposed Public Offering: As soon as practicable after the effective date of the Registration Statement
It is proposed that this filing will become effective (check appropriate box)

☐	immediately upon filing pursuant to paragraph (b)
☒	on June 22, 2023 at 8:30 a.m. Central pursuant to paragraph (b)
☐	60 days after filing pursuant to paragraph (a)(1)
☐	on (date) pursuant to paragraph (a)(1)
☐	75 days after filing pursuant to paragraph (a)(2)
☐	on (date) pursuant to paragraph (a)(2) of rule 485
If appropriate, check the following box:
☒	this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

EXPLANATORY NOTE

Pursuant to Rule 485(b)(1)(iii) under the Securities Act of 1933, this Post-Effective Amendment No. 80 is being filed for the sole purpose of designating a new effective date, June 22, 2023, for the Registrant’s Post-Effective Amendment No. 79 previously filed on March 21, 2023, pursuant to Rule 485(a) (the “Amendment”).

This Post-Effective Amendment No. 80 incorporates by reference the information contained in Parts A, B and C of the Amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement amendment pursuant to Rule 485(b) promulgated under the Securities Act of 1933, as amended, and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Kansas City, State of Missouri on the 16th day of June, 2023.

	American Century ETF Trust
By:	* _________________________________
	Patrick Bannigan
	President

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

SIGNATURES	TITLE	DATE
* _____________________________	President (principal executive officer)	June 16, 2023
Patrick Bannigan
* _____________________________	Chief Financial Officer and Treasurer (principal financial officer and principal accounting officer)	June 16, 2023
R. Wes Campbell
* _____________________________	Board Chair and Trustee	June 16, 2023
Reginald M. Browne
* _____________________________	Trustee	June 16, 2023
Jeremy I. Bulow
* _____________________________	Trustee	June 16, 2023
Barry A. Mendelson
* _____________________________	Trustee	June 16, 2023
Jonathan S. Thomas
* _____________________________	Trustee	June 16, 2023
Stephen E. Yates

*By: /s/ Evan C. Johnson Evan C. Johnson Attorney in Fact  (pursuant to Power of Attorney dated September 14, 2022)

Pursuant to Power of Attorney, dated September 14, 2022 (filed electronically as Exhibit q1 to Post-Effective Amendment No. 74 to the Registration Statement of the Registrant on September 20, 2022, File No. 333-221045, and incorporated herein by reference).

Secretary’s Certificate, September 14, 2022 (filed electronically as Exhibit q2 to Post-Effective Amendment No. 74 to the Registration Statement of the Registrant on September 20, 2022, File No. 333-221045, and incorporated herein by reference).