# EDGAR Filing Document

**Accession Number:** 0000773757
**File Stem:** 0001193125-25-204994
**Filing Date:** 2025-9
**Character Count:** 6390
**Document Hash:** 8e1eec9f70fa5343ba28bebf0a0a9e46
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-204994.hdr.sgml**: 20250916

**ACCESSION NUMBER**: 0001193125-25-204994

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250916

**DATE AS OF CHANGE**: 20250916

**EFFECTIVENESS DATE**: 20250916

**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:** 251317437

**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 September 16, 2025**

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 | 1/1/2025 |

---

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

*The portfolio manager information for AlphaSimplex Group, LLC (AlphaSimplex) 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"Fund Management" in the Summary Prospectus and in the "Summary of the Fund" section of the Prospectus is hereby superseded and replaced with the following:*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:** AlphaSimplex Group, LLC (AlphaSimplex)

---

| | | | |
|:---|:---|:---|:---|
| **Portfolio Management** | **Title** | **Role with Fund** | **Managed Fund Since** |
| Alexander Healy, Ph.D. | &nbsp;&nbsp;&nbsp;&nbsp; Chief Investment Officer and Portfolio <br> Manager of AlphaSimplex<br>| Co-Portfolio Manager | 2018 |
| Kathryn Kaminski, Ph.D., CAIA | &nbsp;&nbsp;&nbsp;&nbsp; Chief Research Strategist and Portfolio <br> Manager of AlphaSimplex<br>| Co-Portfolio Manager | 2018 |
| Philippe Lüdi, Ph.D., CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Research Scientist and Portfolio <br> Manager of AlphaSimplex<br>| Co-Portfolio Manager | 2018 |
| Tansu Demirbilek | &nbsp;&nbsp;&nbsp;&nbsp; Senior Research Scientist and Portfolio <br> Manager at AlphaSimplex<br>| Co-Portfolio Manager | September 2025 |

---

*The rest of the section remains the same.*

*The portfolio manager information for AlphaSimplex under the "More Information About the Fund — Primary Service Provider Contracts — Portfolio Managers" subsection of the Fund's Prospectus is hereby superseded and replaced with the following:*

**Subadviser:** AlphaSimplex Group, LLC (AlphaSimplex)

---

| | | | |
|:---|:---|:---|:---|
| **Portfolio Management** | **Title** | **Role with Fund** | **Managed Fund Since** |
| Alexander Healy, Ph.D. | &nbsp;&nbsp;&nbsp;&nbsp; Chief Investment Officer and Portfolio <br> Manager of AlphaSimplex<br>| Co-Portfolio Manager | 2018 |
| Kathryn Kaminski, Ph.D., CAIA | &nbsp;&nbsp;&nbsp;&nbsp; Chief Research Strategist and Portfolio <br> Manager of AlphaSimplex<br>| Co-Portfolio Manager | 2018 |
| Philippe Lüdi, Ph.D., CFA | &nbsp;&nbsp;&nbsp;&nbsp; Senior Research Scientist and Portfolio <br> Manager of AlphaSimplex<br>| Co-Portfolio Manager | 2018 |
| Tansu Demirbilek | &nbsp;&nbsp;&nbsp;&nbsp; Senior Research Scientist and Portfolio <br> Manager at AlphaSimplex<br>| Co-Portfolio Manager | September 2025 |

---

**Dr. Healy** joined AlphaSimplex in 2007 and currently serves as Chief Investment Officer. Dr. Healy is responsible for the day-to-day supervision of the research team and the implementation of the firm's investment strategies. Dr. Healy received an A.B. in Mathematics and Computer Science in 2002 and a Ph.D. in Theoretical Computer Science in 2007, both from Harvard University.

**Dr. Kaminski, CAIA** joined AlphaSimplex in 2018 and currently serves as Chief Research Strategist and Portfolio Manager, focusing on portfolio construction and risk management. Prior to joining AlphaSimplex, Dr. Kaminski was a visiting scientist at the MIT Laboratory for Financial Engineering and held portfolio management positions as a director, investment strategies at Campbell and Company and as a senior investment analyst at RPM, a CTA fund of funds. Dr. Kaminski received her B.S. in Electrical Engineering and Ph.D. in Operations Research from Massachusetts Institute of Technology.

**Dr. Lüdi, CFA** joined AlphaSimplex in 2006 and currently serves as Senior Research Scientist, focusing on product and system engineering. Dr. Lüdi received the equivalent of an M.A. in Molecular and Computational Biology from the University of Basel in 2000, followed by an M.S. in Statistics in 2002 and a Ph.D. in Bioinformatics in 2006, both from Duke University.

**Mr. Demirbilek** joined AlphaSimplex in 2025 and currently serves as a Senior Research Scientist and Portfolio Manager. Prior to joining AlphaSimplex, he was a systematic portfolio manager at Brevan Howard since May 2022. He also served as managing director of research and head of systematic macro team at Campbell and Company from November 2015 to March 2022. Mr. Demirbilek began his investment career in 2008 and earned a B.Sc. from Orta Dogu Teknik Universitesi (Middle East Technical University) and an M.Sc. from Ohio State University. He also earned an M.B.A. from Babson College and an M.Fin. in Quantitative Finance from the London Business School.

*The rest of the section remains the same.*

*Shareholders should retain this Supplement for future reference.*

SUP100_08_021_(09/25)

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