As filed with the Securities and Exchange Commission on April 18, 2024
File No. 333-255884
File No. 811-23661


SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM N-1A
REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933

Post-Effective Amendment No. 49

and
REGISTRATION STATEMENT
UNDER
THE INVESTMENT COMPANY ACT OF 1940
Amendment No. 51

HARBOR ETF TRUST
(Exact name of Registrant as Specified in Charter)
111 South Wacker Drive, 34th Floor, Chicago, Illinois 60606
(Address of Principal Executive Offices)
(312) 443-4400
(Registrant’s Telephone Number, including Area Code)
CHARLES F. MCCAIN, ESQ.
Harbor ETF Trust
111 South Wacker Drive – 34th Floor
Chicago, Illinois 60606
CHRISTOPHER P. HARVEY, ESQ.
Dechert LLP
One International Place – 40th Floor
100 Oliver Street
Boston, Massachusetts 02110
(Name and address of Agents 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 May 17, 2024 pursuant to paragraph (b)

60 days after filing pursuant to paragraph (a)(1)

on     pursuant to paragraph (a)(1)

75 days after filing pursuant to paragraph (a)(2)

on     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.
Title of Securities Being Registered: Shares of the Harbor Human Capital Factor Large Cap Growth ETF



Explanatory Note
The purpose of this filing is to delay the effectiveness of the Registrant’s Post-Effective Amendment No. 37 under the Securities Act of 1933 (the “Securities Act”) until May 17, 2024. Parts A, B, and C of the Registrant’s Post-Effective Amendment No. 37 under the Securities Act of 1933 and Amendment No. 39 under the Investment Company Act of 1940, filed on September 15, 2023, are incorporated by reference herein.
On November 27, 2023, the Registrant submitted  Post-Effective Amendment No. 40 to its Registration Statement under the Securities Act and Amendment No. 42 to its Registration Statement under the Investment Company Act (the “First Delaying Amendment”) solely to designate December 27, 2023 as the new effective date for the Post-Effective Amendment pursuant to Rule 485(b) under the Securities Act. The First Delaying Amendment is incorporated herein by reference.
On December 26, 2023, the Registrant submitted  Post-Effective Amendment No. 41 to its Registration Statement under the Securities Act and Amendment No. 43 to its Registration Statement under the Investment Company Act (the “Second Delaying Amendment”) solely to designate January 26, 2024 as the new effective date for the Post-Effective Amendment pursuant to Rule 485(b) under the Securities Act. The Second Delaying Amendment is incorporated herein by reference.
On January 25, 2024, the Registrant submitted  Post-Effective Amendment No. 42 to its Registration Statement under the Securities Act and Amendment No. 44 to its Registration Statement under the Investment Company Act (the “Third Delaying Amendment”) solely to designate February 23, 2024 as the new effective date for the Post-Effective Amendment pursuant to Rule 485(b) under the Securities Act. The Third Delaying Amendment is incorporated herein by reference.
On February 22, 2024, the Registrant submitted  Post-Effective Amendment No. 44 to its Registration Statement under the Securities Act and Amendment No. 46 to its Registration Statement under the Investment Company Act (the “Fourth Delaying Amendment”) solely to designate March 23, 2024 as the new effective date for the Post-Effective Amendment pursuant to Rule 485(b) under the Securities Act. The Fourth Delaying Amendment is incorporated herein by reference.
On March 21, 2024, the Registrant submitted  Post-Effective Amendment No. 46 to its Registration Statement under the Securities Act and Amendment No. 48 to its Registration Statement under the Investment Company Act (the “Fourth Delaying Amendment”) solely to designate April 19, 2024 as the new effective date for the Post-Effective Amendment pursuant to Rule 485(b) under the Securities Act. The Fifth Delaying Amendment is incorporated herein by reference.
The Registrant is submitting Post-Effective Amendment No. 49 to its Registration Statement under the Securities Act and Amendment No. 51 under the Investment Act solely to designate, May 17, 2024 as the new effective date for the Post-Effective Amendment pursuant to Rule 485(b) under the Securities Act.

SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended (the “Securities Act”), and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act and has duly caused this Amendment to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Chicago, the State of Illinois, on April 18, 2024.
Harbor ETF Trust
By: /s/ Charles F. McCain
Charles F. McCain
President and Trustee
Pursuant to the requirements of the Securities Act, this filing has been signed below by the following persons in the capacities and on the dates indicated.
Signatures
Title
Date
/s/ Charles F. McCain

Charles F. McCain
President and Trustee
(Principal Executive Officer)
April 18, 2024
/s/ John M. Paral

John M. Paral
Treasurer
April 18, 2024
/s/ Scott M. Amero*

Scott M. Amero
Trustee
April 18, 2024
/s/ Donna J. Dean*

Donna J. Dean
Trustee
April 18, 2024
/s/ Robert Kasdin*

Robert Kasdin
Trustee
April 18, 2024
/s/ Kathryn L. Quirk*

Kathryn L. Quirk
Trustee
April 18, 2024
/s/ Douglas J. Skinner*

Douglas J. Skinner
Trustee
April 18, 2024
/s/ Ann M. Spruill*

Ann M. Spruill
Trustee
April 18, 2024
/s/ Landis Zimmerman*

Landis Zimmerman
Trustee
April 18, 2024
By* /s/ Charles F. McCain
Charles F. McCain
As Attorney-in-Fact
Dated: April 18, 2024