# EDGAR Filing Document

**Accession Number:** 0000745463
**File Stem:** 0001133228-26-001774
**Filing Date:** 2026-2
**Character Count:** 7647
**Document Hash:** a987948772b25ba2527eff121227bb08
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-26-001774.hdr.sgml**: 20260220

**ACCESSION NUMBER**: 0001133228-26-001774

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260220

**DATE AS OF CHANGE**: 20260220

**EFFECTIVENESS DATE**: 20260220

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eaton Vance Mutual Funds Trust
- **CENTRAL INDEX KEY:** 0000745463

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-90946
- **FILM NUMBER:** 26659823

**BUSINESS ADDRESS:**
- **STREET 1:** ONE POST OFFICE SQUARE
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109
- **BUSINESS PHONE:** 617-482-8260

**MAIL ADDRESS:**
- **STREET 1:** ONE POST OFFICE SQUARE
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON VANCE MUTUAL FUNDS TRUST
- **DATE OF NAME CHANGE:** 19950711

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON VANCE GOVERNMENT OBLIGATIONS TRUST
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### Eaton Vance Government Opportunities Fund (Series ID: S000005288)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                        | Ticker Symbol | Class ID   |
| Eaton Vance Government Opportunities Fund Class R | ERGOX         | C000014450 |
| Eaton Vance Government Opportunities Fund Class A | EVGOX         | C000014451 |
| Eaton Vance Government Opportunities Fund Class C | ECGOX         | C000014453 |
| Eaton Vance Government Opportunities Fund Class I | EIGOX         | C000077399 |

---

### Eaton Vance Short Duration Government Income Fund (Series ID: S000005290)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                                       | Ticker Symbol | Class ID   |
| Eaton Vance Short Duration Government Income Fund Class A        | EALDX         | C000014457 |
| Eaton Vance Short Duration Government Income Fund Class C        | ECLDX         | C000014459 |
| Eaton Vance Short Duration Government Income Fund Class I        | EILDX         | C000078260 |
| Eaton Vance Short Duration Government Income Fund Advisers Class | nan           | C000227652 |

---

## Series and Classes Contracts Data

### Eaton Vance Government Opportunities Fund (Series ID: S000005288)

| Class ID   | Class Name                                        | Ticker Symbol   |
|:---|:---|:---|
| C000014450 | Eaton Vance Government Opportunities Fund Class R | ERGOX           |
| C000014451 | Eaton Vance Government Opportunities Fund Class A | EVGOX           |
| C000014453 | Eaton Vance Government Opportunities Fund Class C | ECGOX           |
| C000077399 | Eaton Vance Government Opportunities Fund Class I | EIGOX           |

### Eaton Vance Short Duration Government Income Fund (Series ID: S000005290)

| Class ID   | Class Name                                                       | Ticker Symbol   |
|:---|:---|:---|
| C000014457 | Eaton Vance Short Duration Government Income Fund Class A        | EALDX           |
| C000014459 | Eaton Vance Short Duration Government Income Fund Class C        | ECLDX           |
| C000078260 | Eaton Vance Short Duration Government Income Fund Class I        | EILDX           |
| C000227652 | Eaton Vance Short Duration Government Income Fund Advisers Class |  |

**EATON VANCE GOVERNMENT OPPORTUNITIES FUND**

**EATON VANCE SHORT DURATION GOVERNMENT INCOME FUND**

**(each, a "Fund" and together, the "Funds")**

**Supplement to Summary Prospectuses, Statutory Prospectus and**

**Statement of Additional Information ("SAI") dated March 1, 2025**

**as may be supplemented and/or revised from time to time**

**The following changes are effective immediately:**

**1. The following replaces "Portfolio Managers" under "Management" in "Fund Summary" in each Fund's Summary Prospectus and the Funds' Statutory Prospectus:**

**Portfolio Managers**

**Gregory A. Finck**, Managing Director of Morgan Stanley and Vice President of BMR, has co-managed the Fund since February 2026.

**Andrew Szczurowski, CFA**, Managing Director of Morgan Stanley and Vice President of BMR, has managed or co-managed the Fund since July 2014.

**2. The following replaces the seventh paragraph under "Government Opportunities Fund." under "Management." in "Management and Organization" in the Funds' Statutory Prospectus:**

The Fund is managed by Gregory A. Finck (since February 2026) and Andrew Szczurowski, CFA (since July 2014). Messrs. Finck and Szczurowski are Managing Directors of Morgan Stanley and Vice Presidents of BMR and Eaton Vance, have been employees of the Morgan Stanley organization for more than five years and manage other Eaton Vance funds and portfolios.

**3. The following replaces the eleventh paragraph under "Short Duration Government Income Fund." under "Management." in "Management and Organization" in the Funds' Statutory Prospectus:**

Messrs. Finck and Szczurowski manage the Fund and have managed it since February 2026 and July 2014, respectively. Additional information about Messrs. Finck and Szczurowski appears under "Government Opportunities Fund." above.

**4. The following tables replace the tables under "Portfolio Managers." in "Investment Advisory and Administrative Services" in the Funds' SAI:**

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | Number of<br> All Accounts | Total Assets of<br> All Accounts | Number of Accounts<br> Paying a Performance Fee | Total Assets of Accounts<br> Paying a Performance Fee |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Gregory A. Finck<sup>(1)</sup> |  |  |  |  |
| Registered Investment Companies<sup>(2)</sup> | 4 | $5130.5 | 0 | $0 |
| Other Pooled Investment Vehicles | 7 | $408.0 | 0 | $0 |
| Other Accounts | 8 | $3999.9 | 1 | $392.2 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Andrew Szczurowski, CFA<sup>(3)</sup> |  |  |  |  |
| Registered Investment Companies<sup>(2)</sup> | 7 | $19819.8 | 0 | $0 |
| Other Pooled Investment Vehicles | 2 | $317.1 | 0 | $0 |
| Other Accounts | 0 | $0 | 0 | $0 |

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<sup>(1)</sup> As of December 31, 2025.

<sup>(2)</sup> Includes the Fund.

<sup>(3)</sup> This portfolio manager serves as portfolio manager of one or more registered investment companies and/or pooled investment vehicles that invest or may invest in one or more underlying registered investment companies in the Eaton Vance family of funds. The underlying investment companies may be managed by this portfolio manager or another portfolio manager.

The following table shows the dollar range of equity securities beneficially owned (or held notionally through IMAP) in a Fund by its portfolio manager(s) as of the Funds' most recent fiscal year ended October 31, 2024 and in the Eaton Vance family of funds as of December 31, 2024.

---

| | | |
|:---|:---|:---|
| Fund Name and <br> Portfolio Managers | Dollar Range of Equity Securities<br> Beneficially Owned in the Fund | Aggregate Dollar Range of Equity<br> Securities Beneficially Owned in<br> the Eaton Vance Family of Funds |
| Government Opportunities Fund |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Gregory A. Finck<sup>(1)</sup> |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Andrew Szczurowski, CFA | $100001 - $500000 | $100001 - $500000 |
| Short Duration Government Income Fund |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Gregory A. Finck<sup>(1)</sup> |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Andrew Szczurowski, CFA | $100001 - $500000 | $100001 - $500000 |

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<sup>(1)</sup> As of December 31, 2025.

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| | |
|:---|:---|
| **February 20, 2026** | **48668-00 2.20.26** |

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