# MFS Blended Research Mid Cap Equity Fund

MFS Blended Research Mid Cap Equity Fund is a registered fund series of MFS SERIES TRUST X (series S000054892). Net assets $2.9B as of 2026-05-31.

## Profile

- Series ID: S000054892
- Registrant: MFS SERIES TRUST X
- LEI: 549300CJNZTXTE7DBK33
- Net assets: $2.9B
- Total assets: $2.9B
- As of: 2026-05-31

## Advisers

- [Massachusetts Financial Services Company (Advisor)](https://search.stillhousedata.com/firm/110045)

## Top holdings (160 reported)

_Showing 15 of 160 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [Western Digital Corp.](https://search.stillhousedata.com/security/958102105) | — | $86.4M | 294.51% |
| Flex Ltd. | — | $78.4M | 267.20% |
| [Valero Energy Corp.](https://search.stillhousedata.com/security/91913Y100) | — | $58.3M | 198.57% |
| [Ciena Corp.](https://search.stillhousedata.com/security/171779309) | — | $55.7M | 189.96% |
| Viking Holdings Ltd. | — | $54.5M | 185.74% |
| [Okta, Inc.](https://search.stillhousedata.com/security/679295105) | — | $53.5M | 182.24% |
| [Northern Trust Corp.](https://search.stillhousedata.com/security/665859104) | — | $51.6M | 175.69% |
| [Aramark](https://search.stillhousedata.com/security/03852U106) | — | $50.0M | 170.29% |
| [Westinghouse Air Brake Technologies Corp.](https://search.stillhousedata.com/security/929740108) | — | $47.6M | 162.15% |
| [Edison International](https://search.stillhousedata.com/security/281020107) | — | $46.6M | 158.94% |
| [Popular, Inc.](https://search.stillhousedata.com/security/733174700) | — | $44.1M | 150.40% |
| [Phillips 66](https://search.stillhousedata.com/security/718546104) | — | $43.3M | 147.57% |
| [Humana, Inc.](https://search.stillhousedata.com/security/444859102) | — | $42.7M | 145.55% |
| [PG&E Corp.](https://search.stillhousedata.com/security/69331C108) | — | $42.6M | 145.06% |
| [Ameriprise Financial, Inc.](https://search.stillhousedata.com/security/03076C106) | — | $42.2M | 143.94% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-05-31 | $2.9B |
| 2026-02-28 | $2.6B |
| 2025-11-30 | $2.3B |
| 2025-08-31 | $1.9B |
| 2025-05-31 | $1.5B |
| 2025-02-28 | $1.2B |
| 2024-11-30 | $955.3M |
| 2024-08-31 | $794.9M |

## More

- [Registrant: MFS SERIES TRUST X](https://search.stillhousedata.com/registrant/783740)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000054892.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.