# EDGAR Filing Document

**Accession Number:** 0000882748
**File Stem:** 0001398344-26-000410
**Filing Date:** 2026-1
**Character Count:** 3929
**Document Hash:** ac9d41e467164bd8fadd525d950798d7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001398344-26-000410.hdr.sgml**: 20260109

**ACCESSION NUMBER**: 0001398344-26-000410

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260109

**DATE AS OF CHANGE**: 20260109

**EFFECTIVENESS DATE**: 20260109

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BOSTON TRUST WALDEN FUNDS
- **CENTRAL INDEX KEY:** 0000882748

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-44964
- **FILM NUMBER:** 26521447

**BUSINESS ADDRESS:**
- **STREET 1:** ONE BEACON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02108
- **BUSINESS PHONE:** 617-859-3437

**MAIL ADDRESS:**
- **STREET 1:** ONE BEACON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02108

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BOSTON TRUST & WALDEN FUNDS
- **DATE OF NAME CHANGE:** 20110801

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COVENTRY GROUP
- **DATE OF NAME CHANGE:** 19920929

## Series and Classes Contracts Data

### Boston Trust Midcap Fund (Series ID: S000019041)

---

|  |  |  |
|:---|:---|:---|
| Class Name               | Ticker Symbol | Class ID   |
| Boston Trust Midcap Fund | BTMFX         | C000052650 |

---

### Boston Trust Walden Midcap Fund (Series ID: S000033434)

---

|  |  |  |
|:---|:---|:---|
| Class Name                      | Ticker Symbol | Class ID   |
| Boston Trust Walden Midcap Fund | WAMFX         | C000102803 |

---

## Series and Classes Contracts Data

### Boston Trust Midcap Fund (Series ID: S000019041)

| Class ID   | Class Name               | Ticker Symbol   |
|:---|:---|:---|
| C000052650 | Boston Trust Midcap Fund | BTMFX           |

### Boston Trust Walden Midcap Fund (Series ID: S000033434)

| Class ID   | Class Name                      | Ticker Symbol   |
|:---|:---|:---|
| C000102803 | Boston Trust Walden Midcap Fund | WAMFX           |

**Boston Trust Walden Funds** 

One Beacon Street<br> Boston, MA 02108

Boston Trust Midcap Fund (BTMFX)<br> Boston Trust Walden Midcap Fund (WAMFX)<br> (each a "Fund," collectively the "Funds")

**Supplement dated January 9, 2026<br> to the Prospectus and Statement of Additional Information ("SAI") dated May 1, 2025,<br> as supplemented from time to time** 

Effective January 9, 2026, Mark B. Zagata will no longer serve as co-portfolio manager of the Boston Trust Walden Midcap Fund and the Boston Trust Midcap Fund. As of January 9, 2026, the Prospectus and SAI of the Funds are amended as follows:

1. All references to Mark B. Zagata are removed from the Prospectus and SAI.

2. "Porfolio Management" on page 9 of the Prospectus with respect to the Boston Trust Midcap Fund is restated as follows:

---

| | |
|:---|:---|
| **Investment Adviser:** | Boston Trust Walden Inc. |
| **Lead Portfolio Manager:** | Stephen J. Amyouny, CFA, Since 2007 |
| **Portfolio Manager:** | Richard Q. Williams, CFA, Since 2017 |

---

3. "Porfolio Management" on page 22 of the Prospectus with respect to the Boston Trust Walden Midcap Fund is restated as follows:

---

| | |
|:---|:---|
| **Investment Adviser:** | Boston Trust Walden Inc. |
| **Lead Portfolio Manager:** | Stephen J. Amyouny, CFA, Since 2007 |
| **Portfolio Manager:** | Richard Q. Williams, CFA, Since 2017 |

---

**Please retain this supplement with your Summary Prospectus and Prospectus for future reference.** 

*This Supplement dated January 9, 2026, and the Summary Prospectus, Prospectus, and SAI, each dated May 1, 2025, as supplemented, provide relevant information for all shareholders and should be retained for future reference. The Prospectus and SAI have been filed with the Securities and Exchange Commission, are incorporated by reference, and can be obtained without charge by calling 1-800-282-8782, extension 7050.*