# EDGAR Filing Document

**Accession Number:** 0001070732
**File Stem:** 0001133228-25-010015
**Filing Date:** 2025-9
**Character Count:** 3930
**Document Hash:** 55e1be41632d38ef48be9f54f85b0797
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-25-010015.hdr.sgml**: 20250923

**ACCESSION NUMBER**: 0001133228-25-010015

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 5

**FILED AS OF DATE**: 20250923

**DATE AS OF CHANGE**: 20250923

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eaton Vance Senior Income Trust
- **CENTRAL INDEX KEY:** 0001070732

**ORGANIZATION NAME:**
- **EIN:** 043435040

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 811-09013
- **FILM NUMBER:** 251333641

**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 SENIOR INCOME TRUST
- **DATE OF NAME CHANGE:** 19980919

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 14A**

**Proxy Statement Pursuant to Section 14(a) of the**

**Securities Exchange Act of 1934**

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

**☐** **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))**

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

**<u>Eaton Vance Senior Income Trust</u>**

**(Name of Registrant as specified in its Charter)**

**(Name of Person(s) Filing Proxy Statement), if other than the Registrant)**

Payment of Filing Fee (Check the appropriate box):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

**Eaton Vance Senior Income Trust**

One Post Office Square

Boston, Massachusetts 02109

**Supplement to Proxy Statement**

**for**

**Annual Meeting of Shareholders**

On August 22, 2025, Eaton Vance Senior Income Trust (the "Fund") filed with the Securities and Exchange Commission the definitive proxy statement (the "Proxy Statement") for its annual meeting of shareholders (the "Annual Meeting") to be held on Wednesday, October 8, 2025, at 11:30 a.m. (Eastern Time). The Fund is filing this supplement to its Proxy Statement (the "Supplement") to correct certain inadvertent scrivener's errors in the Proxy Statement and the form of proxy cards filed with the Proxy Statement, as discussed below.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. The
 Proxy Statement referenced an incorrect number of outstanding Auction Preferred Shares entitled
 to vote at the Annual Meeting as of the record date, July 29, 2025. We are issuing this Supplement
 to provide the correct information:

As of July 29, 2025, there were 1,504 Auction Preferred Shares, $0.01 par value per share, liquidation preference $25,000 per share, of the Fund outstanding.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. The
 form of proxy cards attached to the EDGAR filing referenced an incorrect Annual Meeting date.
 The proxy cards mailed to shareholders included the correct Annual Meeting date, and this
 Supplement updates the form of proxy cards included in the EDGAR version of the Proxy Statement. **There are no changes to the proxy card or voting instruction form previously mailed to shareholders.** 

For more information, please contact the Fund at 1-800-262-1122. This Supplement should be read in conjunction with the Proxy Statement, and other than the revisions described above, this Supplement does not modify any information in the Proxy Statement. From and after the date of this Supplement, any references to the "Proxy Statement" are to the Proxy Statement as supplemented hereby.

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| | |
|:---|:---|
| **September 23, 2025** | **48648-00 9.23.25** |

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