# EDGAR Filing Document

**Accession Number:** 0000773757
**File Stem:** 0001193125-26-116978
**Filing Date:** 2026-3
**Character Count:** 7151
**Document Hash:** e3abbc649d5334caa1ab63ee04aa7be0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-116978.hdr.sgml**: 20260320

**ACCESSION NUMBER**: 0001193125-26-116978

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260320

**DATE AS OF CHANGE**: 20260320

**EFFECTIVENESS DATE**: 20260320

**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:** 26776909

**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 Alternative Strategies Fund (Series ID: S000036207)

| Class ID   | Class Name                                                    | Ticker Symbol   |
|:---|:---|:---|
| C000179757 | Multi-Manager Alternative Strategies Fund Institutional Class | CZAMX           |

**Supplement dated March 20, 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 Alternative 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 Manulife Investment Management (US) LLC (Manulife)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:** Manulife Investment Management (US) LLC (Manulife)

---

| | | | |
|:---|:---|:---|:---|
| **Portfolio Management** | **Title** | **Role with Fund** | **Managed Fund Since** |
| Christopher Chapman, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Portfolio Manager – Co-Head of <br> Global Multi-Sector Fixed Income of <br> Manulife<br>| Portfolio Manager | 2017 |
| Thomas Goggins | Senior Portfolio Manager of Manulife | Portfolio Manager | 2017 |
| Bradley Lutz, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Portfolio Manager - Co-Head of <br> Global Multi-Sector Fixed Income of <br> Manulife<br>| Portfolio Manager | 2022 |
| Kisoo Park<sup>\*</sup> <br>| Senior Portfolio Manager of Manulife | Portfolio Manager | 2017 |
| Christopher Smith, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Associate Portfolio Manager, Managing <br> Director - Global Multi-Sector Fixed Income <br> of Manulife<br>| Portfolio Manager | March 2026 |
| David Bees, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Portfolio Manager, Managing Director - <br> Global Multi-Sector Fixed Income of <br> Manulife<br>| Portfolio Manager | March 2026 |
| Kelly Lim, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Associate Portfolio Manager, Global Multi-<br> Sector Fixed Income of Manulife<br>| Portfolio Manager | March 2026 |

---

*\*Kisoo Park, one of the Fund's portfolio managers, has announced plans to retire from Manulife, effective September 1, 2026. Until then, Mr. Park will serve as a Portfolio Manager of the Fund.*

*The rest of the section remains the same.*

*The portfolio manager information for Manulife 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:** Manulife Investment Management (US) LLC (Manulife)

---

| | | | |
|:---|:---|:---|:---|
| **Portfolio Management** | **Title** | **Role with Fund** | **Managed Fund Since** |
| Christopher Chapman, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Portfolio Manager – Co-Head of <br> Global Multi-Sector Fixed Income of <br> Manulife<br>| Portfolio Manager | 2017 |
| Thomas Goggins | Senior Portfolio Manager of Manulife | Portfolio Manager | 2017 |
| Bradley Lutz, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Portfolio Manager - Co-Head of <br> Global Multi-Sector Fixed Income of <br> Manulife<br>| Portfolio Manager | 2022 |
| Kisoo Park<sup>\*</sup> <br>| Senior Portfolio Manager of Manulife | Portfolio Manager | 2017 |
| Christopher Smith, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Associate Portfolio Manager, Managing <br> Director - Global Multi-Sector Fixed Income <br> of Manulife<br>| Portfolio Manager | March 2026 |
| David Bees, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Portfolio Manager, Managing Director - <br> Global Multi-Sector Fixed Income of <br> Manulife<br>| Portfolio Manager | March 2026 |
| Kelly Lim, CFA | &nbsp;&nbsp;&nbsp;&nbsp; Associate Portfolio Manager, Global Multi-<br> Sector Fixed Income of Manulife<br>| Portfolio Manager | March 2026 |

---

**Mr. Chapman** joined Manulife in 2005. Mr. Chapman began his investment career in 1999 and earned a BSBA in Management from Stonehill College and MSF from Boston College.

**Mr. Goggins** joined Manulife in 2009. Mr. Goggins began his investment career in 1989 and earned a BBA from the University of Wisconsin and MA in Finance from JL Kellogg Graduate School of Management at Northwestern University.

**Mr. Lutz** joined Manulife in 2002. Mr. Lutz began his investment career in 1992 and earned a B.S. in finance from Miami University.

SUP100_08_026_(03/26)

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**Mr. Park** joined Manulife in 2011. Mr. Park began his investment career in 1986 and earned a BA in Economics from Tufts University and attended the University of Chicago Booth School of Business.

**Mr. Smith** joined Manulife in 2012. Mr. Smith began his investment career in 2010 and earned a B.B.A.. in finance and finance management from Merrimack College.

**Mr. Bees** joined Manulife in 2004. Mr. Bees began his investment career in 2004 and earned a BS from the Syracuse University and MS in Finance from D'Amore -McKim School of Business at Northeastern University.

**Ms. Lim** joined Manulife in 2026. Prio to joining Manulife, Ms. Lim was a Senior Trader at Fidelity International. Ms. Lim began her investment career in 2010 and earned a BSc in Actuarial Science from the London School of Economics and Political Science and a MSc in Mathematical and Computation Finance from the University of Oxford.

*\*Kisoo Park, one of the Fund's portfolio managers, has announced plans to retire from Manulife, effective September 1, 2026. Until then, Mr. Park will serve as a Portfolio Manager of the Fund.*

*The rest of the section remains the same.*

*Shareholders should retain this Supplement for future reference.*

SUP100_08_026_(03/26)

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