# EDGAR Filing Document

**Accession Number:** 0000773757
**File Stem:** 0001193125-26-127762
**Filing Date:** 2026-3
**Character Count:** 5266
**Document Hash:** 2f2624d8d5eab8d8e81698a678415d5c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-127762.hdr.sgml**: 20260327

**ACCESSION NUMBER**: 0001193125-26-127762

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260327

**DATE AS OF CHANGE**: 20260327

**EFFECTIVENESS DATE**: 20260327

**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:** 26801376

**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 Total Return Bond Strategies Fund (Series ID: S000036205)

| Class ID   | Class Name                                                          | Ticker Symbol   |
|:---|:---|:---|
| C000179755 | Multi-Manager Total Return Bond Strategies Fund Institutional Class | CTRZX           |

**Supplement dated March 27, 2026**

to the Prospectus and Summary Prospectus (each as supplemented) of the following fund:

---

| | |
|:---|:---|
| **Fund** | **Prospectus and Summary Prospectus Dated** |
| Columbia Funds Series Trust I |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Multi-Manager Total Return Bond Strategies Fund | 1/1/2026 |

---

*Effective immediately, the following changes are hereby made to the Fund's Prospectus and Summary Prospectus.*

*The portfolio manager information for Voya Investment Management Co. LLC (Voya) under the heading "Fund Management" in the Summary Prospectus and in the "Summary of the Fund" section of the Prospectus is hereby superseded and replaced with the following:*

**Subadviser:** Voya Investment Management Co. LLC (Voya)

---

| | | | |
|:---|:---|:---|:---|
| **Portfolio Management** | **Title** | **Role with Fund** | **Managed Fund Since** |
| David Goodson | Head of Securitized of Voya | Co-Portfolio Manager | 2018 |
| Sean Banai, CFA | Head of Multi-Sector of Voya | Co-Portfolio Manager | 2024 |
| Rajen Jadav, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Vice President and Portfolio <br> Manager of Voya<br>| Co-Portfolio Manager | March 2026 |
| Anuranjan Sharma | &nbsp;&nbsp;&nbsp;&nbsp; Senior Vice President and Portfolio <br> Manager of Voya<br>| Co-Portfolio Manager | March 2026 |
| Vinay Viralam, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Vice President and Portfolio <br> Manager of Voya<br>| Co-Portfolio Manager | March 2026 |

---

*The rest of the section remains the same.*

*The portfolio manager information for Voya under the heading "Primary Service Provider Contracts - Portfolio Managers" in the "More Information About the Fund" section of the Prospectus is hereby superseded and replaced with the following:*

**Subadviser:** Voya Investment Management Co. LLC (Voya)

---

| | | | |
|:---|:---|:---|:---|
| **Portfolio Management** | **Title** | **Role with Fund** | **Managed Fund Since** |
| David Goodson | Head of Securitized of Voya | Co-Portfolio Manager | 2018 |
| Sean Banai, CFA | Head of Multi-Sector of Voya | Co-Portfolio Manager | 2024 |
| Rajen Jadav, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Vice President and Portfolio <br> Manager of Voya<br>| Co-Portfolio Manager | March 2026 |
| Anuranjan Sharma | &nbsp;&nbsp;&nbsp;&nbsp; Senior Vice President and Portfolio <br> Manager of Voya<br>| Co-Portfolio Manager | March 2026 |
| Vinay Viralam, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Vice President and Portfolio <br> Manager of Voya<br>| Co-Portfolio Manager | March 2026 |

---

**Mr. Goodson** joined Voya in 2002. Mr. Goodson began his investment career in 1996 and earned a BS in management from Georgia Institute of Technology.

**Mr. Banai** joined Voya in 1999. Mr. Banai began his investment career in 1999 and earned a BA and MS from Georgia State University.

**Mr. Jadav** joined Voya in 2019. Mr. Jadav began his investment career in 1997 and earned a BS in business management and economics from SUNY at Stony Brook and an MA in economics from New York University.

**Mr. Sharma** joined Voya in 2014. Mr. Sharma began his investment career in 2005 and earned a MBA in investment strategy, with honors, from Carnegie Mellon University and a BT in chemical engineering from the Indian Institute of Technology (IIT) Delhi.

**Mr. Viralam** joined Voya in 2016. Mr. Viralam began his investment career in 2005 and earned a BS in finance, economics and electrical & systems engineering from the University of Pennsylvania.

*The rest of the section remains the same.*

*Shareholders should retain this Supplement for future reference.*

SUP101_08_018_(03/26)

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