# MFS Research Fund

MFS Research Fund is a security (CUSIP 552981391) tracked across SEC portfolio filings. 1 registered fund positions totaling $190.6M via N-PORT as of 2026-05-31.

## Summary

- Issuer: MFS Research Fund
- CUSIP: 552981391
- Asset category: EC
- 13F holders: 0
- N-PORT fund positions: 1
- N-PORT value: $190.6M
- N-PORT report: 2026-05-31

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [MFS Conservative Allocation Fund](https://search.stillhousedata.com/fund/S000002510) | MFS SERIES TRUST X | $190.6M | 528.57% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/552981391.md)
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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.