# MFS Government Money Market Fund — new fund registration

MFS SERIES TRUST IV registered fund series on Form 485APOS, filed 2006-10-27. Featured series: MFS Government Money Market Fund.

## Registration

- Registrant / trust: MFS SERIES TRUST IV
- CIK: 0000063068
- Form: 485APOS
- Filed: 2006-10-27
- State of incorporation: MA
- Accession: 0001047469-06-013200

## Series & classes (17)

| Series | Class | Ticker | New |
| --- | --- | --- | --- |
| [MFS Government Money Market Fund](https://search.stillhousedata.com/fund/S000002433) | MFS Government Money Market Fund | — | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | A | OTCAX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | R5 | OTCJX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | 529A | EAMCX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | 529B | EBCGX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | 529C | ECGRX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | B | OTCBX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | C | OTCCX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | I | OTCIX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | R | MMCRX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | R1 | OTCGX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | R2 | OTCKX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | R3 | MCPRX | — |
| [MFS Mid Cap Growth Fund](https://search.stillhousedata.com/fund/S000002434) | R4 | OTCHX | — |
| [MFS Money Market Fund](https://search.stillhousedata.com/fund/S000002435) | MFS Money Market Fund | MCMXX | — |
| [MFS Municipal Bond Fund](https://search.stillhousedata.com/fund/S000002436) | A | MMBFX | — |
| [MFS Municipal Bond Fund](https://search.stillhousedata.com/fund/S000002436) | B | MMBBX | — |

## Fees (from the effective prospectus)

- Gross expense ratio: 1.18%
- Management fee: 0.40%
- Other expenses: 0.78%

## Investment objective

The funds investment objective is to seek current income consistent with preservation of capital and liquidity.

## Other filings by this registrant (8)

- [485APOS — 2025-10-08](https://search.stillhousedata.com/launch/0000912938-25-000191)
- [485APOS — 2016-10-27](https://search.stillhousedata.com/launch/0001104659-16-152435)
- [485APOS — 2015-10-29](https://search.stillhousedata.com/launch/0001104659-15-073922)
- [485APOS — 2015-06-29 (27 new series)](https://search.stillhousedata.com/launch/0001104659-15-048286)
- [485APOS — 2014-10-29](https://search.stillhousedata.com/launch/0001104659-14-074631)
- [485APOS — 2011-09-30 (8 new series)](https://search.stillhousedata.com/launch/0001104659-11-054163)
- [485APOS — 2009-10-13](https://search.stillhousedata.com/launch/0001193125-09-206870)
- [485APOS — 2007-03-30](https://search.stillhousedata.com/launch/0001047469-07-002353)

## More

- [Registrant profile: MFS SERIES TRUST IV](https://search.stillhousedata.com/registrant/63068)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/launch/0001047469-06-013200.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.