# EDGAR Filing Document

**Accession Number:** 0001551950
**File Stem:** 0001193125-26-127828
**Filing Date:** 2026-3
**Character Count:** 3981
**Document Hash:** 6f12715104c630dc9bdf4e6a044eaa2b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-127828.hdr.sgml**: 20260327

**ACCESSION NUMBER**: 0001193125-26-127828

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 11

**FILED AS OF DATE**: 20260327

**DATE AS OF CHANGE**: 20260327

**EFFECTIVENESS DATE**: 20260327

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Columbia ETF Trust I
- **CENTRAL INDEX KEY:** 0001551950

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-209996
- **FILM NUMBER:** 26801734

**BUSINESS ADDRESS:**
- **STREET 1:** 290 CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210
- **BUSINESS PHONE:** 800-774-3768

**MAIL ADDRESS:**
- **STREET 1:** 290 CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210

## Series and Classes Contracts Data

### Columbia Research Enhanced Mid Cap ETF (Series ID: S000095312)

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|  |  |  |
|:---|:---|:---|
| Class Name                             | Ticker Symbol | Class ID   |
| Columbia Research Enhanced Mid Cap ETF | REMC          | C000264031 |

---

## Series and Classes Contracts Data

### Columbia Research Enhanced Mid Cap ETF (Series ID: S000095312)

| Class ID   | Class Name                             | Ticker Symbol   |
|:---|:---|:---|
| C000264031 | Columbia Research Enhanced Mid Cap ETF | REMC            |

?xml version='1.0' encoding='ASCII'? 497

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**Supplement dated March 27, 2026**

to the Prospectus and Summary Prospectus of the following fund:

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| | |
|:---|:---|
| **Fund** | &nbsp;&nbsp; **Prospectus and** <br> **Summary Prospectus** <br> **Dated**<br>|
| Columbia ETF Trust I |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Columbia Research Enhanced Mid Cap ETF | &nbsp;&nbsp; Prospectus: 9/15/2025, <br> as amended 12/3/2025; <br> Summary Prospectus: 12/3/2025<br>|

---

*The Board of Trustees of Columbia Research Enhanced Mid Cap ETF (the Fund) approved changes to the Fund's Principal Investment Strategies (effective August 1, 2026) and the Fund's performance benchmark (effective immediately). Accordingly as of the dates referenced above, the changes described in this Supplement are hereby made to the Fund's Prospectus and Summary Prospectus.*

*Effective August 1, 2026, the first paragraph under the subsection "Principal Investment Strategies" in the Fund's Summary Prospectus and in the "Summary of Columbia Research Enhanced Mid Cap ETF" section in the Fund's Prospectus is hereby superseded and replaced with the following:*

The Fund is an actively managed exchange-traded fund (ETF). Under normal circumstances, the Fund invests at least 80% of its assets (plus the amount of any borrowings for investment purposes) in equity securities of companies that have market capitalizations in the range of the companies in the Russell Mid Cap Index (the Capitalization Index), which ranged between $145.1 million and $128.9 billion as of February 28, 2026. The market capitalization range and composition of companies in the Capitalization Index are subject to change.

*Effective immediately, information under the subsection "Performance Information" in the Fund's Summary Prospectus and in the "Summary of Columbia Research Enhanced Mid Cap ETF" section in the Fund's Prospectus is hereby superseded and replaced with the following:*

The Fund has not had a full calendar year of operations as of the date of this prospectus and therefore performance information is not available.

When available, the Fund intends to compare its performance to the performance of the Russell Mid Cap Index, the Solactive United States 800 Index and the Russell 3000<sup>®</sup> Index.

Updated performance information can be obtained by calling toll-free 800.426.3750 or visiting columbiathreadneedleus.com/etfs.

*Shareholders should retain this Supplement for future reference.*

SUP343_03_001_(03/26)

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