# EDGAR Filing Document

**Accession Number:** 0000074663
**File Stem:** 0001133228-26-003789
**Filing Date:** 2026-3
**Character Count:** 3394
**Document Hash:** 1ce4e588a7a4c33aa8c080bf9062eb56
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-26-003789.hdr.sgml**: 20260319

**ACCESSION NUMBER**: 0001133228-26-003789

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260319

**DATE AS OF CHANGE**: 20260319

**EFFECTIVENESS DATE**: 20260319

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eaton Vance Series Trust II
- **CENTRAL INDEX KEY:** 0000074663

**ORGANIZATION NAME:**
- **EIN:** 132706484
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-42722
- **FILM NUMBER:** 26774148

**BUSINESS ADDRESS:**
- **STREET 1:** ONE POST OFFICE SQUARE
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109
- **BUSINESS PHONE:** 6174828260

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON VANCE SERIES TRUST II
- **DATE OF NAME CHANGE:** 20031030

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON VANCE INCOME FUND OF BOSTON
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** OPPENHEIMER INCOME FUND OF BOSTON INC
- **DATE OF NAME CHANGE:** 19821207

## Series and Classes Contracts Data

### Eaton Vance Income Fund of Boston (Series ID: S000004984)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                 | Ticker Symbol | Class ID   |
| Eaton Vance Income Fund of Boston Class A  | EVIBX         | C000013484 |
| Eaton Vance Income Fund of Boston Class C  | ECIBX         | C000013486 |
| Eaton Vance Income Fund of Boston Class R  | ERIBX         | C000013487 |
| Eaton Vance Income Fund of Boston Class I  | EIBIX         | C000013488 |
| Eaton Vance Income Fund of Boston Class R6 | EIBRX         | C000142452 |

---

## Series and Classes Contracts Data

### Eaton Vance Income Fund of Boston (Series ID: S000004984)

| Class ID   | Class Name                                 | Ticker Symbol   |
|:---|:---|:---|
| C000013484 | Eaton Vance Income Fund of Boston Class A  | EVIBX           |
| C000013486 | Eaton Vance Income Fund of Boston Class C  | ECIBX           |
| C000013487 | Eaton Vance Income Fund of Boston Class R  | ERIBX           |
| C000013488 | Eaton Vance Income Fund of Boston Class I  | EIBIX           |
| C000142452 | Eaton Vance Income Fund of Boston Class R6 | EIBRX           |

**eaton vance income Fund of boston**

**eaton vance short duration high income Fund**

**(the "Funds")**

**Supplement to Summary Prospectuses, Statutory Prospectus<br> and Statement of Additional Information ("SAI") dated March 1, 2026**

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

Effective December 31, 2026 (the "Effective Date"), Stephen C. Concannon, CFA intends to retire and will no longer serve as a portfolio manager of the Funds. Accordingly, on the Effective Date, all references to Mr. Concannon will be removed from the Funds' Summary Prospectuses, Statutory Prospectus and SAI.

Justin H. Bourgette, CFA, Bo Hunt and Jeffrey D. Mueller will continue to serve as portfolio managers of Eaton Vance Income Fund of Boston.

Justin H. Bourgette, CFA and Bo Hunt will continue to serve as portfolio managers of Eaton Vance Short Duration High Income Fund.

---

| | |
|:---|:---|
| **March 19, 2026** | **48675-00 3.19.26** |

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