Post-Effective Amendment to Post-Effective Amendment by Investment Company (Form 485BXT)

As filed with the Securities and Exchange Commission on October 1, 2026

File No. 333-255884
File No. 811-23661

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549  

FORM N-1A
REGISTRATION STATEMENT

and

REGISTRATION STATEMENT

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

STEPHANIE A. CAPISTRON, 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)

If appropriate, check the following box:

Explanatory Note

The purpose of this filing is to delay the effectiveness of the Registrant's Post-Effective Amendment No. 98 under the Securities Act of 1933 (the "Securities Act") until October 5, 2026. Parts A, B, and C of the Registrant's Post-Effective Amendment No. 98 under the Securities Act of 1933 and Amendment No. 100 under the Investment Company Act of 1940, filed on July 2, 2026, are incorporated by reference herein.

On September 14, 2026, the Registrant submitted Post-Effective Amendment No. 108 to its Registration Statement under the Securities Act and Amendment No. 110 to its Registration Statement under the Investment Company Act (the "First Delaying Amendment") solely to designate September 18, 2026 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 September 17, 2026, the Registrant submitted Post-Effective Amendment No. 109 to its Registration Statement under the Securities Act and Amendment No. 111 to its Registration Statement under the Investment Company Act (the "Second Delaying Amendment") solely to designate September 23, 2026 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 September 21, 2026, the Registrant submitted Post-Effective Amendment No. 110 to its Registration Statement under the Securities Act and Amendment No. 112 to its Registration Statement under the Investment Company Act (the "Third Delaying Amendment") solely to designate September 25, 2026 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 September 24, 2026, the Registrant submitted Post-Effective Amendment No. 111 to its Registration Statement under the Securities Act and Amendment No. 113 to its Registration Statement under the Investment Company Act (the "Fourth Delaying Amendment") solely to designate September 29, 2026 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 September 28, 2026, the Registrant submitted Post-Effective Amendment No. 112 to its Registration Statement under the Securities Act and Amendment No. 114 to its Registration Statement under the Investment Company Act (the "Fifth Delaying Amendment") solely to designate October 2, 2026 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. 113 to its Registration Statement under the Securities Act and Amendment No. 115 under the Investment Company Act solely to designate October 5, 2026 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 October 1, 2026.

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)	October 1, 2026
/s/ Howard M. Reich Howard M. Reich	Treasurer (Principal Financial and Accounting Officer)	October 1, 2026
/s/ Anne F. Ackerley* Anne F. Ackerley	Trustee	October 1, 2026
/s/ Scott M. Amero* Scott M. Amero	Trustee	October 1, 2026
/s/ Donna J. Dean* Donna J. Dean	Trustee	October 1, 2026
/s/ Robert Kasdin* Robert Kasdin	Trustee	October 1, 2026
/s/ Kathryn L. Quirk* Kathryn L. Quirk	Trustee	October 1, 2026
/s/ Douglas J. Skinner* Douglas J. Skinner	Trustee	October 1, 2026
/s/ Ann M. Spruill* Ann M. Spruill	Trustee	October 1, 2026
/s/ Landis Zimmerman* Landis Zimmerman	Trustee	October 1, 2026

By* /s/ Charles F. McCain

 Charles F. McCain
 As Attorney-in-Fact

 Dated: October 1, 2026

* Pursuant to Powers of Attorney dated July 1, 2025 - filed with Post-Effective Amendment No. 79 on July 15, 2025