# MFS HIGH YIELD MUNICIPAL TRUST — SC TO-I

MFS HIGH YIELD MUNICIPAL TRUST of BOSTON, MA filed a SC TO-I with the SEC on 2026-04-06.

## Filing

- Filed: 2026-04-06
- Form: SC TO-I
- Accession: 0000930413-26-000980
- Registrant: MFS HIGH YIELD MUNICIPAL TRUST
- CIK: 0000809844
- State of incorporation: MA
- Location: BOSTON, MA

## Documents (15)

| Seq | Type | Description |
| --- | --- | --- |
| 1 | SC TO-I | c115878\_sctoi.htm |
| 2 | EX-99.(A)(1)(I) | c115878\_ex99-a1i.htm |
| 3 | GRAPHIC | GRAPHIC |
| 4 | GRAPHIC | GRAPHIC |
| 5 | EX-99.(A)(1)(II) | c115878\_ex99-a1ii.htm |
| 6 | GRAPHIC | GRAPHIC |
| 7 | GRAPHIC | GRAPHIC |
| 8 | EX-99.(A)(1)(III) | c115878\_ex99-a1iii.htm |
| 9 | EX-99.(A)(1)(IV) | c115878\_ex99-a1iv.htm |
| 10 | EX-99.(A)(1)(V) | c115878\_ex99-a1v.htm |
| 11 | GRAPHIC | GRAPHIC |
| 12 | EX-99.(A)(5)(III) | c115878\_ex99a5iii.htm |
| 13 | GRAPHIC | GRAPHIC |
| 14 | EX-FILING FEES | c115878\_exs-ixbrl.htm |
| 26 | XML | EXTRACTED XBRL INSTANCE DOCUMENT |

## Filing timeline for this registrant (26)

_Showing 12 of 26 filings._

| Filed | Form |
| --- | --- |
| [2026-05-11](https://search.stillhousedata.com/proxy/0000930413-26-001549) | SC TO-I/A |
| [2026-05-06](https://search.stillhousedata.com/proxy/0000930413-26-001497) | SC TO-I/A |
| 2026-04-06 | SC TO-I |
| [2026-03-04](https://search.stillhousedata.com/proxy/0000930413-26-000673) | SC TO-C |
| [2023-11-14](https://search.stillhousedata.com/proxy/0000912938-23-000496) | SC TO-I/A |
| [2023-11-07](https://search.stillhousedata.com/proxy/0000912938-23-000485) | SC TO-I/A |
| [2023-10-06](https://search.stillhousedata.com/proxy/0000912938-23-000451) | SC TO-I |
| [2023-08-25](https://search.stillhousedata.com/proxy/0000912938-23-000398) | SC TO-C |
| [2012-09-12](https://search.stillhousedata.com/proxy/0001193125-12-389495) | SC TO-I/A |
| [2012-09-07](https://search.stillhousedata.com/proxy/0001193125-12-385003) | SC TO-I/A |
| [2012-08-31](https://search.stillhousedata.com/proxy/0001193125-12-377570) | SC TO-I/A |
| [2012-08-24](https://search.stillhousedata.com/proxy/0001193125-12-367040) | SC TO-I/A |

## More

- [CIK 809844 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=809844&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/proxy/0000930413-26-000980.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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