# MFS HIGH YIELD MUNICIPAL TRUST

MFS HIGH YIELD MUNICIPAL TRUST (CIK 809844) is an SEC-registered fund company and $47.4M in net assets as of 2026-05-31.

## Registrant

- CIK: 809844
- File number: 811-04992
- LEI: A8WLLLHJKX1MW5QPZU93
- Address: 111 HUNTINGTON AVENUE, BOSTON, US-MA, 02199
- Phone: 617-954-5000
- Net assets: $47.4M
- Total assets: $80.8M
- Latest report: 2026-05-31

## Fund series (1)

| Series | Net assets |
| --- | --- |
| MFS HIGH YIELD MUNICIPAL TRUST | $47.4M |

## Largest reported holdings (across all series)

| Holding | Value |
| --- | --- |
| [MFS Institutional Money Market Portfolio](https://search.stillhousedata.com/security/55291X109) | $2.4M |
| [Washington Health Care Facilities Authority](https://search.stillhousedata.com/security/93978HFX8) | $1.1M |
| [Chicago Board of Education Dedicated Capital Improvement Tax](https://search.stillhousedata.com/security/167510AA4) | $987K |
| [County of Cuyahoga OH](https://search.stillhousedata.com/security/2322655U8) | $770K |
| [Florida Development Finance Corp](https://search.stillhousedata.com/security/340618DV6) | $743K |
| [District of Columbia](https://search.stillhousedata.com/security/25483WAK8) | $742K |
| [Orange County Health Facilities Authority](https://search.stillhousedata.com/security/68450LGN9) | $702K |
| [New York Transportation Development Corp](https://search.stillhousedata.com/security/650116HT6) | $692K |
| [Greater Orlando Aviation Authority](https://search.stillhousedata.com/security/392275FJ7) | $686K |
| [New York Transportation Development Corp](https://search.stillhousedata.com/security/650116GY6) | $656K |
| [Tulsa County Industrial Authority](https://search.stillhousedata.com/security/899530BA6) | $648K |
| [Washington State Housing Finance Commission](https://search.stillhousedata.com/security/939783Z58) | $638K |
| [Chicago Board of Education](https://search.stillhousedata.com/security/167505ZG4) | $565K |
| [Allegheny County Airport Authority](https://search.stillhousedata.com/security/01728LKZ4) | $551K |
| [Orange County Health Facilities Authority](https://search.stillhousedata.com/security/68450LJQ9) | $535K |

## 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/registrant/809844.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.