# EDGAR Filing Document

**Accession Number:** 0001258623
**File Stem:** 0001133228-26-000399
**Filing Date:** 2026-1
**Character Count:** 12862
**Document Hash:** 4ec06abd68512a6d14f02c6e75954d16
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-26-000399.hdr.sgml**: 20260122

**ACCESSION NUMBER**: 0001133228-26-000399

**CONFORMED SUBMISSION TYPE**: 424B3

**PUBLIC DOCUMENT COUNT**: 11

**FILED AS OF DATE**: 20260122

**DATE AS OF CHANGE**: 20260122

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eaton Vance Senior Floating-Rate Trust
- **CENTRAL INDEX KEY:** 0001258623

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 424B3
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-266343
- **FILM NUMBER:** 26550749

**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 FLOATING RATE TRUST
- **DATE OF NAME CHANGE:** 20031017

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON VANCE SENIOR FLOATING RATE FUND
- **DATE OF NAME CHANGE:** 20030806

?xml version='1.0' encoding='ASCII'?

![Eaton Vance Logo - NEW](image_001.jpg)

**Filed pursuant to Rule 424(b)(3) File No. 333-266343**

**EATON VANCE SENIOR FLOATING-RATE TRUST** Supplement to Prospectus dated March 31, 2023

**The following replaces the Financial Highlights contained in the Prospectus:**

**Selected data for a Common Share outstanding during the periods stated.**

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** |
| | **2025** | **2024** | **2023** | **2022** | **2021** |
| Net asset value - Beginning of year (Common shares) | $12.91 | $12.77 | $12.28 | $14.30 | $13.50 |
| **Income (Loss) From Operations** |  |  |  |  |  |
| Net investment income<sup>(1)</sup> | $1.23 | $1.50 | $1.45 | $0.92 | $0.72 |
| Net realized and unrealized gain (loss) | (0.47) | 0.27 | 0.44 | (1.93) | 0.91 |
| &nbsp;&nbsp;&nbsp;Distributions to preferred shareholders From net investment income<sup>(1)</sup> | (0.18) | (0.22) | (0.20) | (0.05) |  |
| **Total income (loss) from operations** | $**0.58** | $**1.55** | $**1.69** | $**(1.06)** | $**1.63** |
| **Less Distributions to Common Shareholders** |  |  |  |  |  |
| From net investment income | $(1.07) | $(1.38) | $(1.20) | $(0.88) | $(0.81) |
| Tax return on capital | (0.03) | (0.03) |  | (0.10) | (0.05) |
| **Total distributions to common shareholders** | $**(1.10)** | $**(1.41)** | $**(1.20)** | $**(0.98)** | $**(0.86)** |
| **Premium from common shares sold through shelf offering<sup>(1)</sup>** | $**0.00** **<sup>(2)</sup>** | $**0.00** **<sup>(2)</sup>** | $**—** | $**0.02** | $**0.00** **<sup>(2)</sup>** |
| **Discount on tender offer<sup>(1)</sup>** | $**—** | $**—** | $**—** | $**—** | $**0.03** |
| **Net asset value — End of year (Common shares)** | $**12.39** | $**12.91** | $**12.77** | $**12.28** | $**14.30** |
| **Market value — End of year (Common shares)** | $**11.40** | $**12.77** | $**11.64** | $**11.17** | $**14.90** |
| **Total Investment Return on Net Asset Value<sup>(3)</sup>** | **5.06%** | **12.62%** | **15.09%** | **(7.26)%** | **12.69%** |
| **Total Investment Return on Market Value<sup>(3)</sup>** | **(2.27)%** | **22.31%** | **15.34%** | **(19.10)%** | **33.21%** |
| &nbsp;&nbsp;&nbsp;**Ratios/Supplemental Data** |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Net assets applicable to common shares, end of year (000's omitted) | $365788 | $378631 | $372481 | $358405 | $403589 |
| &nbsp;&nbsp;&nbsp;Ratios (as a percentage of average daily net assets applicable to common shares):<sup>(4)(5)†</sup> |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Expenses excluding interest and fees | 1.36% | 1.29% | 1.34% | 1.37% | 1.33% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Interest and fee expense<sup>(6)</sup> | 1.90% | 2.10% | 1.95% | 0.81% | 0.46% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total expenses | 3.26% | 3.39% | 3.29% | 2.18% | 1.79% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net expenses | 3.26%<sup>(7)</sup> | 3.39%<sup>(7)</sup> | 3.29%<sup>(7)</sup> | 2.18%<sup>(7)</sup> | 1.79% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net investment income | 9.73% | 11.59% | 11.37% | 6.83% | 5.05% |
| Portfolio Turnover | 30% | 28% | 24% | 12% | 66% |
| Senior Securities: |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total notes payable outstanding (in 000's) | $110000 | $133000 | $110000 | $133000 | $120000 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Asset coverage per $1,000 of notes payable<sup>(8)</sup> | $5016 | $4418 | $5076 | $4265 | $4995 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total preferred shares outstanding | 3032 | 3032 | 3032 | 3032 | 3032 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Asset coverage per preferred share<sup>(9)</sup> | $74235 | $70350 | $75134 | $67924 | $76531 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Involuntary liquidation preference per preferred share<sup>(10)</sup> | $25000 | $25000 | $25000 | $25000 | $25000 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Approximate market value per preferred share<sup>(10)</sup> | $25000 | $25000 | $25000 | $25000 | $25000 |

---

(See related footnotes.)

**Financial Highlights (continued)**

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** |
|  | **2020** | **2019** | **2018** | **2017** | **2016** |
| Net asset value - Beginning of year (Common shares) | $14.51 | $15.37 | $15.21 | $14.86 | $14.35 |
| **Income (Loss) From Operations** |  |  |  |  |  |
| Net investment income<sup>(1)</sup> | $0.81 | $0.99 | $0.89 | $0.89 | $0.96 |
| Net realized and unrealized gain (loss) | (0.87) | (0.80) | 0.15 | 0.36 | 0.46 |
| &nbsp;&nbsp;&nbsp;Distributions to preferred shareholders From net investment income<sup>(1)</sup> | (0.03) | (0.07) | (0.06) | (0.03) | (0.02) |
| &nbsp;&nbsp;&nbsp;Discount on redemption and repurchase of auction preferred shares<sup>(1)</sup> |  |  | 0.04 |  | 0.05 |
| **Total income (loss) from operations** | $**(0.09)** | $**0.12** | $**1.02** | $**1.22** | $**1.45** |
| **Less Distributions to Common Shareholders** |  |  |  |  |  |
| From net investment income | $(0.92) | $(0.98) | $(0.86) | $(0.87) | $(0.94) |
| **Total distributions to common shareholders** | $**(0.92)** | $**(0.98)** | $**(0.86)** | $**(0.87)** | $**(0.94)** |
| **Net asset value — End of year (Common shares)** | $**13.50** | $**14.51** | $**15.37** | $**15.21** | $**14.86** |
| **Market value — End of year (Common shares)** | $**11.90** | $**12.91** | $**13.43** | $**14.55** | $**14.15** |
| **Total Investment Return on Net Asset Value<sup>(3)</sup>** | **0.42%** | **1.69%** | **7.25** **%<sup>(11)</sup>** | **8.54%** | **11.31** **%<sup>(12)</sup>** |
| **Total Investment Return on Market Value<sup>(3)</sup>** | **(0.52)%** | **3.55%** | **(2.04)%** | **9.04%** | **17.27%** |
| &nbsp;&nbsp;&nbsp;**Ratios/Supplemental Data** |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;Net assets applicable to common shares, end of year (000's omitted) | $497341 | $534714 | $566490 | $560431 | $547620 |
| &nbsp;&nbsp;&nbsp;Ratios (as a percentage of average daily net assets applicable to common shares):<sup>(4)(5)†</sup> |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Expenses excluding interest and fees | 1.32% | 1.28% | 1.31% | 1.34% | 1.38% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Interest and fee expense<sup>(6)</sup> | 0.78% | 1.40% | 1.06% | 0.75% | 0.49% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total expenses | 2.10% | 2.68% | 2.37% | 2.09% | 1.87% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net expenses | 2.10% | 2.68% | 2.37% | 2.09% | 1.87% |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Net investment income | 6.03% | 6.64% | 5.78% | 5.93% | 6.84% |
| Portfolio Turnover | 30% | 28% | 32% | 42% | 35% |
| Senior Securities: |  |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total notes payable outstanding (in 000's) | $223000 | $218000 | $222000 | $199000 | $198000 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Asset coverage per $1,000 of notes payable<sup>(8)</sup> | $3570 | $3801 | $3893 | $4298 | $4250 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total preferred shares outstanding | 3032 | 3032 | 3032 | 3836 | 3836 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Asset coverage per preferred share<sup>(9)</sup> | $66612 | $70501 | $72558 | $72511 | $71584 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Involuntary liquidation preference per preferred share<sup>(10)</sup> | $25000 | $25000 | $25000 | $25000 | $25000 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Approximate market value per preferred share<sup>(10)</sup> | $25000 | $25000 | $25000 | $25000 | $25000 |

---

(See related footnotes.)

<sup>(1)</sup> Computed using average shares outstanding.

<sup>(2)</sup> Amount is less than $0.005.

<sup>(3)</sup> Returns are historical and are calculated by determining the percentage change in net asset value or market value with all distributions reinvested. Distributions are assumed to be reinvested at prices obtained under the Trust's dividend reinvestment plan.

<sup>(4)</sup> Total expenses do not reflect amounts reimbursed and/or waived by the adviser and certain of its affiliates, if applicable. Net expenses are net of all reductions and represent the net expenses paid by the Trust.

<sup>(5)</sup> Ratios do not reflect the effect of dividend payments to preferred shareholders.

<sup>(6)</sup> Interest and fee expense relates to the notes payable incurred to partially redeem the Trust's APS.

<sup>(7)</sup> Includes a reduction by the investment adviser of a portion of its adviser fee due to the Trust's investment in the Morgan Stanley Institutional Liquidity Funds – Government Portfolio (equal to less than 0.005% of average daily net assets for the years ended October 31, 2025, 2024, 2023 and 2022).

<sup>(8)</sup> Calculated by subtracting the Trust's total liabilities (not including the notes payable and preferred shares) from the Trust's total assets, and dividing the result by the notes payable balance in thousands.

<sup>(9)</sup> Calculated by subtracting the Trust's total liabilities (not including the notes payable and preferred shares) from the Trust's total assets, dividing the result by the sum of the value of the notes payable and liquidation value of preferred shares, and multiplying the result by the liquidation value of one preferred share. Such amount equates to 297%, 281%, 301%, 272%, 306%, 266%, 282%, 290%, 290% and 286% at October 31, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017 and 2016, respectively.

<sup>(10)</sup> Plus accumulated and unpaid dividends.

<sup>(11)</sup> The total return based on net asset value reflects the impact of the tender and repurchase by the Trust of a portion of its APS at 92% of the per share liquidation preference. Absent this transaction, the total return based on net asset value would have been 6.94%.

<sup>(12)</sup> The total return based on net asset value reflects the impact of the tender and repurchase by the Trust of a portion of its APS at 95% of the per share liquidation preference. Absent this transaction, the total return based on net asset value would have been 10.95%.

<sup>†</sup> Ratios based on net assets applicable to common shares plus preferred shares and borrowings are presented below. Ratios do not reflect the effect of dividend payments to preferred shareholders and exclude the effect of custody fee credits, if any.

---

| | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** | **Year Ended October 31,** |
| | **2025** | **2024** | **2023** | **2022** | **2021** | **2020** | **2019** | **2018** | **2017** | **2016** |
| Expenses excluding interest and fees | 0.89% | 0.86% | 0.89% | 0.88% | 0.87% | 0.84% | 0.82% | 0.85% | 0.87% | 0.88% |
| Interest and fee expense | 1.23% | 1.39% | 1.28% | 0.52% | 0.31% | 0.50% | 0.91% | 0.69% | 0.49% | 0.31% |
| Total expenses | 2.12% | 2.25% | 2.17% | 1.40% | 1.18% | 1.34% | 1.73% | 1.54% | 1.36% | 1.19% |
| Net investment income | 6.33% | 7.66% | 7.47% | 4.39% | 3.34% | 3.86% | 4.29% | 3.76% | 3.85% | 4.34% |

---

January 22, 2026