# EDGAR Filing Document

**Accession Number:** 0000798244
**File Stem:** 0000912938-23-000262
**Filing Date:** 2023-3
**Character Count:** 3736
**Document Hash:** 77184ab24986e77ae3f0d41b188fc016
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912938-23-000262.hdr.sgml**: 20230302

**ACCESSION NUMBER**: 0000912938-23-000262

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230302

**DATE AS OF CHANGE**: 20230302

**EFFECTIVENESS DATE**: 20230302

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST I
- **CENTRAL INDEX KEY:** 0000798244
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1130

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-07638
- **FILM NUMBER:** 23696566

**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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS SERIES TRUST I /MA/
- **DATE OF NAME CHANGE:** 19940427

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS LIFETIME MANAGED SECTORS FUND
- **DATE OF NAME CHANGE:** 19930408

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LIFETIME MANAGED SECTORS TRUST
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### MFS Technology Fund (Series ID: S000000768)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| A          | MTCAX         | C000002249 |
| R4         | MTCJX         | C000002250 |
| B          | MTCBX         | C000002251 |
| C          | MTCCX         | C000002252 |
| I          | MTCIX         | C000002253 |
| R1         | MTCKX         | C000002255 |
| R2         | MTERX         | C000002257 |
| R3         | MTCHX         | C000002258 |
| R6         | MTCLX         | C000124425 |

---

## Series and Classes Contracts Data

### MFS Technology Fund (Series ID: S000000768)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000002249 | A            | MTCAX           |
| C000002250 | R4           | MTCJX           |
| C000002251 | B            | MTCBX           |
| C000002252 | C            | MTCCX           |
| C000002253 | I            | MTCIX           |
| C000002255 | R1           | MTCKX           |
| C000002257 | R2           | MTERX           |
| C000002258 | R3           | MTCHX           |
| C000124425 | R6           | MTCLX           |

![](image0.jpg)

SUPPLEMENT TO THE PROSPECTUS

*Supplement dated March 2, 2023, to the Prospectus dated December 29, 2022.*

MFS<sup>®</sup> Technology Fund

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#### <br>
**Effective immediately, the sentence after the tables in the sections entitled "Portfolio Manager(s)" under the main headings entitled "Summary of Key Information" and "Management of the Fund" is replaced in its entirety with the following:**

Effective September 29, 2023, Matthew Sabel will retire as a portfolio manager of the fund.

1050493 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SCT-SUP-I-030223

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