Company: EVF
Filing Date: 2025-05-01
Form Type: 424B3
Source: 0001076598-25-000098
Chunk: 0

Company: Eaton Vance Senior Income Trust
Filing Date: 2025-05-01
Form: 424B3
Chunk 0
---
| Filed pursuant to Rule 424(b)(3)                                      
 File Nos. 333-265180, 333-263033, 333-265889, 333-266343, 333-268410, 
 333-270448, 333-269206, 333-284330                                    |

<div align='center'>EATON VANCE NATIONAL MUNICIPAL OPPORTUNITIES TRUST

Supplement to Prospectus dated July 28, 2022

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

EATON VANCE SENIOR INCOME TRUST

Supplement to Prospectus dated August 25, 2022

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

EATON VANCE FLOATING-RATE INCOME TRUST

Supplement to Prospectus dated September 27, 2022

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

EATON VANCE SENIOR FLOATING-RATE TRUST

EATON VANCE TAX-ADVANTAGED GLOBAL DIVIDEND OPPORTUNITIES FUND

Supplement to Prospectuses dated March 31, 2023

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

EATON VANCE TAX-MANAGED BUY-WRITE INCOME FUND

Supplement to Prospectus dated May 4, 2023

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

EATON VANCE MUNICIPAL INCOME TRUST

Supplement to Prospectus dated May 10, 2023

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

EATON VANCE ENHANCED EQUITY INCOME FUND

Supplement to Prospectus dated January 17, 2025

as may be supplemented and/or revised from time to time</div>

| 1. | The following replaces “Potential Conflicts of Interest”: |

As a diversified global financial services firm, Morgan Stanley,
the parent company of the investment adviser and sub-adviser (if applicable), engages in a broad spectrum of activities, including financial
advisory services, investment management activities, lending, commercial banking, sponsoring and managing private investment funds, engaging
in broker-dealer transactions and principal securities, commodities and foreign exchange transactions, research publication and other
activities. In the ordinary course of its business, Morgan Stanley is a full-service investment banking and financial services firm and
therefore engages in activities where Morgan Stanley’s