# EDGAR Filing Document

**Accession Number:** 0000773757
**File Stem:** 0001193125-26-280301
**Filing Date:** 2026-6
**Character Count:** 4693
**Document Hash:** e29091c6a4a5280ec997b7caffc54645
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-280301.hdr.sgml**: 20260624

**ACCESSION NUMBER**: 0001193125-26-280301

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260624

**DATE AS OF CHANGE**: 20260624

**EFFECTIVENESS DATE**: 20260624

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COLUMBIA FUNDS SERIES TRUST I
- **CENTRAL INDEX KEY:** 0000773757

**ORGANIZATION NAME:**
- **EIN:** 363376651
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-99356
- **FILM NUMBER:** 261113159

**BUSINESS ADDRESS:**
- **STREET 1:** 290 CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210
- **BUSINESS PHONE:** 800-345-6611

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COLUMBIA FUNDS TRUST IX
- **DATE OF NAME CHANGE:** 20031107

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LIBERTY STEIN ROE FUNDS MUNICIPAL TRUST
- **DATE OF NAME CHANGE:** 19991025

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** STEINROE MUNICIPAL TRUST
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### Multi-Manager Small Cap Equity Strategies Fund (Series ID: S000036206)

| Class ID   | Class Name                                                         | Ticker Symbol   |
|:---|:---|:---|
| C000179756 | Multi-Manager Small Cap Equity Strategies Fund Institutional Class | CZMSX           |

**Supplement dated June 24, 2026**

to the Prospectus and Summary Prospectus of the following fund (the Fund):

---

| | |
|:---|:---|
| **Fund** | **Prospectus and Summary Prospectus Dated** |
| Columbia Funds Series Trust I |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Multi-Manager Small Cap Equity Strategies Fund | 1/1/2026 |

---

*On June 18, 2026, the Fund's Board of Trustees approved certain changes to the Fund's subadvisers and principal investment strategies effective on or about August 21, 2026 (the Effective Date). As a result, from the Effective Date, Conestoga Capital Advisors, LLC (Conestoga) no longer serves as a subadviser to the Fund. Accordingly, as of the Effective Date, the changes described in this Supplement are hereby made to the Fund's Prospectus and Summary Prospectus.*

*The information under the heading "Principal Investment Strategies" in the Summary Prospectus and in both the "Summary of the Fund" and "More Information About the Fund" sections of the Prospectus between the fifth and last paragraph is hereby superseded and replaced with the following:*

The Fund may also invest in exchange-traded funds (ETFs), including pending the engagement of one or more additional subadvisers.

Columbia Management is responsible for providing day-to-day portfolio management of one sleeve of the Fund and is also responsible for oversight of the Subadvisers. The Fund's Subadvisers are Hotchkis and Wiley Capital Management, LLC (Hotchkis & Wiley), J.P. Morgan Investment Management Inc. (JPMIM) and Jacobs Levy Equity Management, Inc. (Jacobs Levy). Columbia Management and the Subadvisers act independently of each other and use their own methodologies for selecting investments. Columbia Management, subject to the oversight of the Fund's Board of Trustees, determines the allocation of the Fund's assets to each sleeve and may change these allocations at any time.

*The information under the heading "Fund Management" in the Summary Prospectus and in the "Summary of the Fund" section of the Prospectus is hereby revised to remove the information on Conestoga as a subadviser.*

*The information under the heading "Principal Investment Strategies" in the "More Information About the Fund" section of the Prospectus is hereby revised to remove the subheading "Conestoga – Small Cap Growth Strategy Sleeve" and the information on Conestoga.*

*The last sentence of the sixth paragraph under the subsection "The Investment Manager" in the "More Information About the Fund" section of the Prospectus is hereby revised to remove the information on Conestoga as a subadviser.*

*The information under the subsection "Subadvisers" in the "More Information About the Fund" section of the Prospectus is hereby revised to remove the information on Conestoga as a subadviser.*

*The information under the subsection "Portfolio Managers" in the "More Information About the Fund" section of the Prospectus is hereby revised to remove the information on Conestoga as a subadviser.*

*Shareholders should retain this Supplement for future reference.*

SUP102_08_016_(06/26)

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