MFS High Yield Municipal Trust
Printed from CEF Radar (cefradar.com). Source: public filings at the U.S. Securities and Exchange Commission. Last checked: Nov 2, 2026, 1:39 a.m. New York time.
MFS High Yield Municipal Trust is a company, not a closed-end fund. We still track it - notices about it are below - but most of this site is about funds.
Is anyone targeting this fund?
Yes - one large investor holds a stake, but it has not asked for changes.
- RiverNorth owns 11.6% as a passive investor. On file since Nov 14, 2024.
What this means for you
One large investor owns more than 5% of this company but has told the regulator it is not seeking changes. That is common for banks, brokers and index funds that hold shares for their clients.
Nothing is required of you. If an investor changes its mind, it must file a new notice within days, and it will show up here.
What happened, and when
-
Aug 21, 2026
Almitas sold down below 5% and stopped reporting.
Original document → -
May 18, 2026
Almitas filed an updated notice; it still owns 5.9%, as a passive investor.
Original document → -
May 15, 2026
RiverNorth raised its stake to 11.6% (from 10.1%), as a passive investor.
Original document → -
May 12, 2026
Bulldog sold down below 5% and stopped reporting.
Original document → -
May 5, 2026
Bulldog cut its stake to 6.9% (from 11.2%). It has said it may push for changes.
Original document →
Show all 25 events
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May 1, 2026
Bulldog cut its stake to 11.2% (from 12.5%). It has said it may push for changes.
Original document → -
April 27, 2026
Bulldog cut its stake to 12.5% (from 13.6%). It has said it may push for changes.
Original document → -
April 9, 2026
Bulldog cut its stake to 13.6% (from 15.7%). It has said it may push for changes.
Original document → -
Feb 17, 2026
Almitas filed an updated notice; it still owns 5.9%, as a passive investor.
Original document → -
Dec 16, 2025
Bulldog raised its stake to 15.7% (from 14.3%). It has said it may push for changes.
Original document → -
Nov 14, 2025
Almitas now owns 5.9%, as a passive investor.
Original document → -
Nov 14, 2025
Bulldog raised its stake to 14.3% (from 13.1%). It has said it may push for changes.
Original document → -
Oct 7, 2025
RiverNorth raised its stake to 10.1% (from 7.5%), as a passive investor.
Original document → -
Oct 2, 2025
Sit Investment sold down below 5% and stopped reporting.
Original document → -
Aug 28, 2025
Bulldog raised its stake to 13.1% (from 12.1%). It has said it may push for changes.
Original document → -
July 16, 2025
Bulldog raised its stake to 12.1% (from 11.3%). It has said it may push for changes.
Original document → -
May 15, 2025
RiverNorth raised its stake to 7.5% (from 5.2%), as a passive investor.
Original document → -
April 4, 2025
City of London sold down below 5% and stopped reporting.
Original document → -
Feb 14, 2025
Bulldog raised its stake to 11.3% (from 9.4%). It has said it may push for changes.
Original document → -
Jan 3, 2025
Sit Investment now owns 7.9%, as a passive investor.
Original document → -
Nov 14, 2024
RiverNorth now owns 5.2%, as a passive investor.
Original document → -
Nov 14, 2024
City of London now owns 5%, as a passive investor.
Original document → -
Feb 28, 2024
Bulldog raised its stake to 9.4% (from 8.2%). It has said it may push for changes.
Original document → -
Jan 8, 2024
Saba sold down below 5% and stopped reporting.
Original document → -
Jan 2, 2024
Bulldog now owns 8.2%. It has said it may push for changes.
Original document →
Details: all notices, events and fund facts
| Date | Investor | Stake | Type of notice |
|---|---|---|---|
| Aug 21, 2026 | Almitas | 0% | Sold down below 5% |
| May 18, 2026 | Almitas | 5.9% | Updated notice |
| May 15, 2026 | RiverNorth | 11.6% | Updated notice |
| May 12, 2026 | Bulldog | 1% | Sold down below 5% |
| May 5, 2026 | Bulldog | 6.9% | Updated notice |
| May 1, 2026 | Bulldog | 11.2% | Updated notice |
| April 27, 2026 | Bulldog | 12.5% | Updated notice |
| April 9, 2026 | Bulldog | 13.6% | Updated notice |
| Feb 17, 2026 | Almitas | 5.9% | Passive investor |
| Dec 16, 2025 | Bulldog | 15.7% | Updated notice |
| Nov 14, 2025 | Almitas | 5.9% | Passive investor |
| Nov 14, 2025 | Bulldog | 14.3% | Updated notice |
| Oct 7, 2025 | RiverNorth | 10.1% | Updated notice |
| Oct 2, 2025 | Sit Investment | 4.1% | Sold down below 5% |
| Aug 28, 2025 | Bulldog | 13.1% | Updated notice |
| July 16, 2025 | Bulldog | 12.1% | Updated notice |
| May 15, 2025 | RiverNorth | 7.5% | Updated notice |
| April 4, 2025 | City of London | 4.8% | Sold down below 5% |
| Feb 14, 2025 | Bulldog | 11.3% | Updated notice |
| Jan 3, 2025 | Sit Investment | 7.9% | Passive investor |
| Nov 14, 2024 | RiverNorth | 5.2% | Passive investor |
| Nov 14, 2024 | City of London | 5% | Passive investor |
| Feb 28, 2024 | Bulldog | 9.4% | Updated notice |
| Jan 8, 2024 | Saba | 4.5% | Sold down below 5% |
| Jan 2, 2024 | Bulldog | 8.2% | Updated notice |
No announcements from the fund on file. Most funds announce their payout on their own website, not in a filing with the regulator, so a cut or a raise there does not show up here.
- Run by
- not filed yet
- Fund family
- not filed yet
- Exchange
- not listed
See this fund's page at the SEC →
Email me when something new is filed for MFS High Yield Municipal Trust
Free. One email when a large investor files a notice, or when the fund announces a buy-back, a vote or a closing - usually within a day. No password. Most funds announce payout changes on their own website, where we do not look.