# MFS Mid Cap Growth Fund

MFS Mid Cap Growth Fund is a registered fund series of MFS SERIES TRUST IV (series S000002434). Net assets $13.8B as of 2026-05-31.

## Profile

- Series ID: S000002434
- Registrant: MFS SERIES TRUST IV
- LEI: XPX0WXKIO6CLKBLYF666
- Net assets: $13.8B
- Total assets: $13.9B
- As of: 2026-05-31

## Advisers

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

## Top holdings (111 reported)

_Showing 15 of 111 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [Monolithic Power Systems, Inc.](https://search.stillhousedata.com/security/609839105) | — | $587.3M | 426.08% |
| [Howmet Aerospace, Inc.](https://search.stillhousedata.com/security/443201108) | — | $544.5M | 395.00% |
| [Quanta Services, Inc.](https://search.stillhousedata.com/security/74762E102) | — | $459.9M | 333.62% |
| [Take-Two Interactive Software, Inc.](https://search.stillhousedata.com/security/874054109) | — | $375.2M | 272.20% |
| [Live Nation Entertainment, Inc.](https://search.stillhousedata.com/security/538034109) | — | $361.5M | 262.30% |
| [Natera, Inc.](https://search.stillhousedata.com/security/632307104) | — | $300.6M | 218.05% |
| [TKO Group Holdings, Inc.](https://search.stillhousedata.com/security/87256C101) | — | $292.2M | 212.01% |
| [Masimo Corp.](https://search.stillhousedata.com/security/574795100) | — | $291.9M | 211.79% |
| Ascendis Pharma A/S | — | $285.5M | 207.11% |
| [Burlington Stores, Inc.](https://search.stillhousedata.com/security/122017106) | — | $268.2M | 194.61% |
| [Cloudflare, Inc.](https://search.stillhousedata.com/security/18915M107) | — | $264.3M | 191.72% |
| Seagate Technology Holdings plc | — | $262.5M | 190.41% |
| [Vistra Corp.](https://search.stillhousedata.com/security/92840M102) | — | $242.0M | 175.58% |
| [Nasdaq, Inc.](https://search.stillhousedata.com/security/631103108) | — | $240.5M | 174.51% |
| [Cheniere Energy, Inc.](https://search.stillhousedata.com/security/16411R208) | — | $230.3M | 167.08% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-05-31 | $13.8B |
| 2026-02-28 | $13.8B |
| 2025-11-30 | $14.6B |
| 2025-08-31 | $15.2B |
| 2025-05-31 | $15.0B |
| 2025-02-28 | $14.9B |
| 2024-11-30 | $16.1B |
| 2024-08-31 | $14.7B |

## More

- [Registrant: MFS SERIES TRUST IV](https://search.stillhousedata.com/registrant/63068)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000002434.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.