# EDGAR Filing Document

**Accession Number:** 0000918571
**File Stem:** 0000912938-26-000498
**Filing Date:** 2026-4
**Character Count:** 2836
**Document Hash:** 41a6957553c11010037de0efc3460640
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912938-26-000498.hdr.sgml**: 20260430

**ACCESSION NUMBER**: 0000912938-26-000498

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260430

**DATE AS OF CHANGE**: 20260430

**EFFECTIVENESS DATE**: 20260430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS VARIABLE INSURANCE TRUST
- **CENTRAL INDEX KEY:** 0000918571

**ORGANIZATION NAME:**
- **EIN:** 043226600
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-74668
- **FILM NUMBER:** 26920370

**BUSINESS ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **STREET 2:** 21ST FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
- **BUSINESS PHONE:** 18006372929

**MAIL ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **STREET 2:** 21ST FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199

## Series and Classes Contracts Data

### MFS Mid Cap Growth Series (Series ID: S000002678)

---

|  |  |
|:---|:---|
| Class Name    | Class ID   |
| Initial Class | C000007326 |
| Service Class | C000007327 |

---

## Series and Classes Contracts Data

### MFS Mid Cap Growth Series (Series ID: S000002678)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000007326 | Initial Class |  |
| C000007327 | Service Class |  |

![](img_158e7ae615034f1.jpg)

SUPPLEMENT TO THE PROSPECTUS

*Supplement dated April 30, 2026, to the Prospectus dated April 30, 2026.*

## MFS <sup>®</sup> Mid Cap Growth Series
**Effective July 1, 2026, the following is added to the table in the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Summary of Key Information":**

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;**Portfolio Manager** | &nbsp;&nbsp;&nbsp;**Since** | &nbsp;&nbsp;&nbsp;**Title** |
| &nbsp;&nbsp;&nbsp;Bradford Mak | &nbsp;&nbsp;&nbsp;July 2026 | &nbsp;&nbsp;&nbsp;Investment Officer of MFS |

---

**Effective immediately, the following is added after the tables in the sub-sections entitled "Portfolio Manager(s)" under the main headings entitled "Summary of Key Information" and "Management of the Fund":**

Eric Fischman has announced his intention to retire effective April 30, 2027, and he will no longer be a portfolio manager of the fund as of that date.

**Effective July 1, 2026, the following is added to the table in the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Management of the Fund":**

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Portfolio Manager** | &nbsp;&nbsp;**Primary Role** | &nbsp;&nbsp;**Five Year History** |
| &nbsp;&nbsp;Bradford Mak | &nbsp;&nbsp;Portfolio Manager | &nbsp;&nbsp;Employed in the investment area of MFS since 2010 |

---

VMG-SUP-I-043026

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