# EDGAR Filing Document

**Accession Number:** 0001860434
**File Stem:** 0001193125-26-139184
**Filing Date:** 2026-4
**Character Count:** 4782
**Document Hash:** 99d0ebb1f88ea3bc2dc2ed74e2b50403
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-139184.hdr.sgml**: 20260402

**ACCESSION NUMBER**: 0001193125-26-139184

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260402

**DATE AS OF CHANGE**: 20260402

**EFFECTIVENESS DATE**: 20260402

**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:** 26831015

**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 |

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

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|  |  |  |
|:---|:---|:---|
| 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            |

![](g105845imgfd5908d61.jpg)

**Harbor Osmosis Emerging Markets Resource Efficient ETF** <br>**Harbor Osmosis International Resource Efficient ETF** <br>

**Supplement dated April 2, 2026 to the Prospectus, dated March 1, 2026**

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Effective April 2, 2026 (the "Effective Date"), Dr. Fadi Zaher will serve as a portfolio manager for Harbor Osmosis Emerging Markets Resource Efficient ETF and Harbor Osmosis International Resource Efficient ETF (the "Funds"), each a series of Harbor ETF Trust.

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***The following is added to the "Fund Summary - Portfolio Managers" section of the Funds' Prospectus as of the Effective Date:***

**Dr. Fadi Zaher**, Chief Investment Officer and Portfolio Manager at Osmosis Investment Management US LLC, has managed the Fund since 2026.

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***As of the Effective Date, the applicable table in "The Subadvisors - Portfolio Management" section of the Funds' Prospectus is replaced with the following:***

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

**Osmosis Investment Management US LLC**

Osmosis Investment Management US LLC ("Osmosis"), located at 36-38 Botolph Lane, London, United Kingdom EC3R 8DE, serves as Subadvisor to Harbor Osmosis Emerging Markets Resource Efficient ETF and Harbor Osmosis International Resource Efficient ETF. The portfolio managers are primarily responsible for the day-to-day portfolio management for each aforementioned Fund.

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| | |
|:---|:---|
| **PORTFOLIO MANAGER** | **PROFESSIONAL EXPERIENCE** |
| **Alex Stephen** | Mr. Stephen serves as a Portfolio Manager for the Fund. Mr. Stephen <br> spent eight years in Australia working with Redpoint Investment <br> Management and Antares Equities. Prior to that, Mr. Stephen worked <br> for eight years as a portfolio manager at Legal & General Investment <br> Management (LGIM), managing several index portfolios. Mr. Stephen <br> has been with Osmosis since 2019.<br>|
| **Fadi Zaher** | Dr. Zaher serves as a Portfolio Manager for the Fund, and is the <br> Chief Investment Officer of Osmosis. Dr. Zaher has over 20 years <br> of experience in index, asset allocation, and factor-based investing, <br> including leadership roles at RMS Capital, Barclays Wealth & <br> Investment Management, Kleinwort Benson Bank, and the European <br> Central Bank. Prior to joining Osmosis he led the Index Solutions <br> team at LGIM, and has served as a senior lecturer at Lund University <br> and Imperial College London. Dr. Zaher has been with Osmosis <br> since 2026.<br>|

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*Investors Should Retain This Supplement For Future Reference*

S0426.P.ETF

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