# EDGAR Filing Document

**Accession Number:** 0001860434
**File Stem:** 0001193125-25-235871
**Filing Date:** 2025-10
**Character Count:** 3098
**Document Hash:** 825c4db8cd0a73f4772b13714026228b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-235871.hdr.sgml**: 20251009

**ACCESSION NUMBER**: 0001193125-25-235871

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20251009

**DATE AS OF CHANGE**: 20251009

**EFFECTIVENESS DATE**: 20251009

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Harbor ETF Trust
- **CENTRAL INDEX KEY:** 0001860434

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-255884
- **FILM NUMBER:** 251385321

**BUSINESS ADDRESS:**
- **STREET 1:** 111 SOUTH WACKER DRIVE
- **STREET 2:** 34TH FLOOR
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 312-443-4400

**MAIL ADDRESS:**
- **STREET 1:** 111 SOUTH WACKER DRIVE
- **STREET 2:** 34TH FLOOR
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

## Series and Classes Contracts Data

### Harbor Osmosis Emerging Markets Resource Efficient ETF (Series ID: S000088918)

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|  |  |  |
|:---|:---|:---|
| Class Name                                             | Ticker Symbol | Class ID   |
| Harbor Osmosis Emerging Markets Resource Efficient ETF | EFFE          | C000255316 |

---

### Harbor Osmosis International Resource Efficient ETF (Series ID: S000088919)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                          | Ticker Symbol | Class ID   |
| Harbor Osmosis International Resource Efficient ETF | EFFI          | C000255317 |

---

## Series and Classes Contracts Data

### Harbor Osmosis Emerging Markets Resource Efficient ETF (Series ID: S000088918)

| Class ID   | Class Name                                             | Ticker Symbol   |
|:---|:---|:---|
| C000255316 | Harbor Osmosis Emerging Markets Resource Efficient ETF | EFFE            |

### Harbor Osmosis International Resource Efficient ETF (Series ID: S000088919)

| Class ID   | Class Name                                          | Ticker Symbol   |
|:---|:---|:---|
| C000255317 | Harbor Osmosis International Resource Efficient ETF | EFFI            |

![](g942182imgf5980ac51.jpg)

111 South Wacker Drive, 34<sup>th</sup> Floor<br>Chicago, IL 60606-4302<br>harborcapital.com

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**Supplement to the Prospectus and Statement of Additional Information, dated March 1, 2025**

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**Harbor Osmosis Emerging Markets Resource Efficient ETF**

**Harbor Osmosis International Resource Efficient ETF**

**October 9, 2025**

Effective December 1, 2025 (the "Effective Date"), Robbie Parker, CFA, will no longer serve as a portfolio manager to the Harbor Osmosis Emerging Markets Resource Efficient ETF and the Harbor Osmosis International Resource Efficient ETF (the "Funds").

Accordingly, all references to Mr. Parker in the Prospectus and Statement of Additional Information are hereby removed as of the Effective Date.

There are no other changes to the Funds other than those noted herein.

*Investors Should Retain This Supplement For Future Reference*

S1025.P.SAI.ETF

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