# EDGAR Filing Document

**Accession Number:** 0000882443
**File Stem:** 0001193125-25-244330
**Filing Date:** 2025-10
**Character Count:** 2929
**Document Hash:** 390d89ac07c7b3457bf0914ffbd8e2d7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-244330.hdr.sgml**: 20251021

**ACCESSION NUMBER**: 0001193125-25-244330

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251021

**DATE AS OF CHANGE**: 20251021

**EFFECTIVENESS DATE**: 20251021

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AMG Funds I
- **CENTRAL INDEX KEY:** 0000882443

**ORGANIZATION NAME:**
- **EIN:** 561773580
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-44909
- **FILM NUMBER:** 251405438

**BUSINESS ADDRESS:**
- **STREET 1:** 680 WASHINGTON BOULEVARD, SUITE 500
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06901
- **BUSINESS PHONE:** 2032993500

**MAIL ADDRESS:**
- **STREET 1:** 680 WASHINGTON BOULEVARD, SUITE 500
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06901

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MANAGERS TRUST I
- **DATE OF NAME CHANGE:** 20000801

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SMITH BREEDEN TRUST
- **DATE OF NAME CHANGE:** 19920929

## Series and Classes Contracts Data

### AMG GW&K Core Bond ESG Fund (Series ID: S000009914)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | MBDFX         | C000027427 |
| Class Z    | MBDLX         | C000158522 |
| Class N    | MBGVX         | C000158523 |

---

## Series and Classes Contracts Data

### AMG GW&K Core Bond ESG Fund (Series ID: S000009914)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000027427 | Class I      | MBDFX           |
| C000158522 | Class Z      | MBDLX           |
| C000158523 | Class N      | MBGVX           |

Filed pursuant to Rule 497(e)

File Nos. 033-44909 and 811-06520

**AMG FUNDS I** 

**AMG GW&K Core Bond ESG Fund** 

Supplement dated October 21, 2025 to the Prospectus and Statement of Additional Information, each dated March 1, 2025, as supplemented July 1, 2025

The following information supplements and supersedes any information to the contrary relating to AMG GW&K Core Bond ESG Fund (the "Fund"), a series of AMG Funds I (the "Trust"), contained in the Fund's Prospectus (the "Prospectus") and Statement of Additional Information (the "SAI"), dated and supplemented as noted above.

Effective as of September 30, 2026, Mary F. Kane will retire from GW&K Investment Management, LLC, the Fund's subadviser, and will no longer serve as a portfolio manager of the Fund. Effective upon Ms. Kane's retirement, Brett Kozlowski will serve as the portfolio manager primarily responsible for the day-to-day management of the Fund. Accordingly, as of September 30, 2026, all references to and information relating to Ms. Kane in the Prospectus and SAI are deleted and all references to the portfolio manager of the Fund shall refer to Mr. Kozlowski.

PLEASE KEEP THIS SUPPLEMENT FOR FUTURE REFERENCE