Company: EVF
Filing Date: 2025-08-22
Form Type: DEF 14A
Source: 0001145443-25-000243
Chunk: 2

Company: Eaton Vance Senior Income Trust
Filing Date: 2025-08-22
Form: DEF 14A
Chunk 2
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 vote accordingly FOR or AGAINST any such adjournment of the Annual Meeting.

The Board of Trustees of the Fund has fixed the close of business on July 29, 2025 as the record date for the determination of the shareholders of the Fund entitled to notice of and to vote at the Annual Meeting and any adjournments or postponements thereof.

| By                                         
 Order of the Board of Trustees of the Fund |
| /s/ Nicholas S. Di Lorenzo                 |
| Nicholas                                   
 S. Di Lorenzo                              |
| Secretary                                  |

August 22, 2025

Boston, Massachusetts

<div align='center'>IMPORTANT</div>

Shareholders can help avoid the necessity and additional expense to the Fund(s) of further solicitations by promptly returning the enclosed proxy. The enclosed addressed envelope requires no postage if mailed in the United States and is intended for your convenience.

<div align='center'>Eaton Vance Senior Income Trust

One Post Office Square

Boston, Massachusetts 02109

PROXY STATEMENT</div>

This proxy statement is furnished in connection with the solicitation of proxies by the Board of Trustees of Eaton Vance Senior Income Trust. The proxies will be voted at the Annual Meeting of Shareholders of the Fund and at any adjournments or postponements thereof (the “Annual Meeting”). The Annual Meeting will be held on Wednesday, October 8, 2025 at 11:30 a.m. (Eastern Time) at the principal office of the Fund, One Post Office Square, Boston, Massachusetts 02109, as discussed further herein. The Annual Meeting will be held for the purposes set forth in the accompanying notice. This proxy statement and the enclosed proxy card(s) are first being sent or given to shareholders on or about August 22, 2025.

The Board of Trustees of the Fund (the “Board” or the “Board of Trustees”) has fixed the close of business on July 29, 2025 as the record date for the determination of the shareholders entitled to notice of and to vote at the Annual Meeting and any adjournments or postponements thereof. As of July 29, 2025, there were 18,170,289 common sharesof beneficial interest, $0.01 par value per share (“Common Shares”), and 752 Auction Preferred Shares, $0.01 par value per share, liquidation preference $ 25,000per share (“APS”), of the Fund outstanding. See “Proxy Solicitation, Tabulation and Voting Requirements” below for additional information