# MFS SERIES TRUST I

MFS SERIES TRUST I (CIK 798244) is an SEC-registered fund company with 7 reporting fund series and $80.6B in net assets as of 2026-05-31.

## Registrant

- CIK: 798244
- File number: 811-04777
- LEI: 549300QRB5FQ35HH3533
- Address: 111 HUNTINGTON AVENUE, BOSTON, US-MA, 02199
- Phone: 617-954-5000
- Net assets: $80.6B
- Total assets: $81.1B
- Fund series: 7
- Latest report: 2026-05-31

## Fund series (7)

| Series | Net assets |
| --- | --- |
| [MFS Value Fund](https://search.stillhousedata.com/fund/S000000769) | $51.1B |
| [MFS Research International Fund](https://search.stillhousedata.com/fund/S000000766) | $17.8B |
| [MFS Core Equity Fund](https://search.stillhousedata.com/fund/S000000763) | $6.5B |
| [MFS Technology Fund](https://search.stillhousedata.com/fund/S000000768) | $2.5B |
| [MFS New Discovery Fund](https://search.stillhousedata.com/fund/S000000765) | $2.1B |
| [MFS Low Volatility Equity Fund](https://search.stillhousedata.com/fund/S000042701) | $311.5M |
| [MFS Low Volatility Global Equity Fund](https://search.stillhousedata.com/fund/S000042702) | $294.6M |

## Largest reported holdings (across all series)

| Holding | Value |
| --- | --- |
| Roche Holding AG | $8.7M |
| [Johnson & Johnson](https://search.stillhousedata.com/security/478160104) | $8.5M |
| [Taiwan Semiconductor Manufacturing Co Ltd](https://search.stillhousedata.com/security/874039100) | $8.3M |
| [McKesson Corp](https://search.stillhousedata.com/security/58155Q103) | $7.7M |
| [Analog Devices Inc](https://search.stillhousedata.com/security/032654105) | $7.6M |
| Koninklijke KPN NV | $7.2M |
| [Colgate-Palmolive Co](https://search.stillhousedata.com/security/194162103) | $7.2M |
| [Alphabet Inc](https://search.stillhousedata.com/security/02079K305) | $7.1M |
| [Microsoft Corp](https://search.stillhousedata.com/security/594918104) | $6.5M |
| CLP Holdings Ltd | $6.2M |
| DBS Group Holdings Ltd | $6.0M |
| Eni SpA | $5.7M |
| [Franco-Nevada Corp](https://search.stillhousedata.com/security/351858105) | $4.7M |
| [General Dynamics Corp](https://search.stillhousedata.com/security/369550108) | $4.7M |
| Orion Corp/Republic of Korea | $4.5M |

## More

- [CIK 798244 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=798244&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/registrant/798244.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.