EATON VANCE SENIOR FLOATING-RATE TRUST
Supplement to Prospectus dated February 28, 2022
1. The following replaces the fifth paragraph under “Investment Objectives, Policies and Risk” in “Prospectus Summary” in the Prospectus:
Catherine C. McDermott, Daniel P. McElaney, Craig P. Russ and Andrew N. Sveen are Vice Presidents of Eaton Vance and are portfolio managers of the Trust. Mr. Russ has managed the Trust since November 2003 and Messrs. McElaney and Sveen and Ms. McDermott have managed the Trust since March 2019. Messrs. McElaney, Russ and Sveen and Ms. McDermott have been employed by Eaton Vance for more than five years and manage other Eaton Vance funds. Effective July 1, 2022, the portfolio managers of the Trust will be Catherine C. McDermott, Daniel P. McElaney and Andrew N. Sveen.
2. The following replaces the fifth paragraph under “The Adviser” in “Management of the Trust” in the Prospectus:
Catherine C. McDermott, Daniel P. McElaney, Craig P. Russ and Andrew N. Sveen are Vice Presidents of Eaton Vance and are portfolio managers of the Trust. Mr. Russ has managed the Trust since November 2003 and Messrs. McElaney and Sveen and Ms. McDermott have managed the Trust since March 2019. Messrs. McElaney, Russ and Sveen and Ms. McDermott have been employed by Eaton Vance for more than five years and manage other Eaton Vance funds. Effective July 1, 2022, the portfolio managers of the Trust will be Catherine C. McDermott, Daniel P. McElaney and Andrew N. Sveen.
EATON VANCE SENIOR FLOATING-RATE TRUST
Supplement to Statement of Additional Information dated February 28, 2022
| 1. | The following replaces the first table under “Portfolio Managers.” in “Investment Advisory and Other Services”: |
| | Number of
All Accounts | Total Assets of
All Accounts | Number of Accounts
Paying a Performance Fee | Total Assets of Accounts
Paying a Performance Fee |
| Catherine C. McDermott | | | | |
| Registered Investment Companies | 7 | $4,846.7 | 0 | $0 |
| Other Pooled Investment Vehicles | 0 | $0 | 0 | $0 |
| Other Accounts | 0 | $0 | 0 | $0 |
| Daniel P. McElaney | | | | |
| Registered Investment Companies | 4 | $1,917.6 | 0 | $0 |
| Other Pooled Investment Vehicles | 0 | $0 | 0 | $0 |
| Other Accounts | 0 | $0 | 0 | $0 |
| Craig P. Russ | | | | |
| Registered Investment Companies | 10 | $40,565.8 | 0 | $0 |
| Other Pooled Investment Vehicles | 5 | $5,849.1 | 0 | $0 |
| Other Accounts | 7 | $3,511.9 | 0 | $0 |
| Andrew N. Sveen | | | | |
| Registered Investment Companies | 12 | $41,468.3 | 0 | $0 |
| Other Pooled Investment Vehicles | 0 | $0 | 0 | $0 |
| Other Accounts | 0 | $0 | 0 | $0 |
| 2. | The following replaces the second table under “Portfolio Managers.” in “Investment Advisory and Other Services”: |
| Portfolio Manager | Dollar Range of Equity Securities
Beneficially Owned in the Trust | Aggregate Dollar Range of Equity
Securities Beneficially Owned
in the Eaton Vance Family of Funds |
| Catherine C. McDermott | None | Over $1,000,000 |
| Daniel P. McElaney | None | $100,001 - $500,000 |
| Craig P. Russ | $500,001 - $1,000,000 | Over $1,000,000 |
| Andrew N. Sveen | $100,001 - $500,000 | $100,001 - $500,000 |
Effective July 1, 2022, the portfolio managers of the Trust will be Catherine C. McDermott, Daniel P. McElaney and Andrew N. Sveen.
March 11, 2022
