STOCK TITAN

MFS High Yield Municipal Trust SEC Filings

CMU NYSE

Welcome to our dedicated page for MFS High Yield Municipal Trust SEC filings (Ticker: CMU), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.

Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on MFS High Yield Municipal Trust's stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.

Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time EDGAR feed updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into MFS High Yield Municipal Trust's regulatory disclosures and financial reporting.

Rhea-AI Summary

JPMorgan Chase Bank, N.A., as a 10% owner of MFS HIGH YIELD MUNICIPAL TRUST, reported an internal restructuring involving 330 remarketable variable rate MuniFund term preferred shares held indirectly through a trust. In connection with the reorganization of this fund into MFS MUNICIPAL INCOME TRUST, these 330 preferred shares were exchanged for 330 equivalent preferred shares of the new fund in a cashless transaction, leaving no such preferred shares reported as held in the original trust for this issuer.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
insider
-
Rhea-AI Summary

MFS High Yield Municipal Trust notified the New York Stock Exchange that its Common Shares of Beneficial Interest will be removed from listing and/or registration under Section 12(b) of the Exchange Act.

The Exchange certified compliance with rule 12d2-2 procedures and the issuer certified compliance with Exchange rules for a voluntary withdrawal. The filing is a procedural notice of delisting/withdrawal.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
other
-
Rhea-AI Summary

MFS HIGH YIELD MUNICIPAL TRUST ownership disclosure: Almitas Capital LLC reports beneficial ownership of 1,497,718 shares of Common Stock, representing 5.9% of the class. The filing is an amendment and is signed by Ronald Mass as Managing Principal on 05/18/2026.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
ownership
Rhea-AI Summary

RiverNorth Capital Management filed an amendment to a Schedule 13G reporting beneficial ownership of 2,955,950 shares of MFS High Yield Municipal Trust (CUSIP 59318E102), representing 11.60% of the class as of 03/31/2026. The filing lists sole voting and dispositive power over all reported shares. The amendment is signed by Marcus Collins, General Counsel and Chief Compliance Officer, dated 05/15/2026.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
ownership
-
Rhea-AI Summary

Bulldog Investors, LLP and its principals have reduced their stake in MFS High Yield Municipal Trust (CMU) and are no longer 5% holders. Based on 12,746,391 common shares outstanding as of May 6, 2026, Bulldog Investors is deemed to beneficially own 100,155 shares, or 0.79% of CMU. Phillip Goldstein is deemed to beneficially own 133,190 shares, or 1.04%, while Andrew Dakos is deemed to beneficially own 90,245 shares, or 0.71%, through their roles at Bulldog.

Since the prior filing, accounts managed by Bulldog disposed of 141,450 shares at $3.6400, 79,573 shares at $3.6456, and 1,410,919 shares at $3.71. The reporting persons state they ceased to be beneficial owners of more than 5% of CMU’s common stock on May 6, 2026, following tender offer results disclosed in the company’s press release.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
ownership
-
Rhea-AI Summary

MFS High Yield Municipal Trust filed Amendment No. 3 to its Schedule TO reporting the terms and exhibits for an issuer tender offer commenced April 6, 2026. The Fund offered to purchase for cash up to 50% (12,746,391 shares) of its outstanding common shares upon the terms and conditions set forth in the Offer.

The amendment incorporates the Offer to Purchase, Letter of Transmittal and related communications and adds press releases and the filing fee table as exhibits. The amendment is intended to satisfy Rule 13e-4(c)(3) requirements.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-0.85%
Tags
ownership
Rhea-AI Summary

MFS High Yield Municipal Trust amends its Schedule TO to supplement the tender offer materials for an Offer commenced April 6, 2026, under which the Fund proposes to purchase for cash up to 50% or 12,746,391 shares of its outstanding common shares upon the terms and subject to the conditions of the Offer. This Amendment No. 2 is filed to satisfy Rule 13e-4(c)(3).

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-0.99%
Tags
ownership
-
Rhea-AI Summary

Bulldog Investors, LLP and its principals updated their ownership in MFS High Yield Municipal Trust (CMU) in this Amendment No. 13 to their Schedule 13D. As per an N-CSR, CMU had 25,492,782 common shares outstanding as of 11/30/25.

As of May 1, 2026, Bulldog Investors is deemed the beneficial owner of 1,382,344 shares of CMU, representing 5.42% of outstanding shares. Phillip Goldstein is deemed to beneficially own 1,765,329 shares (6.92%), and Andrew Dakos 1,267,456 shares (4.97%), based on their power to vote and dispose of these shares.

Bulldog Investors has sole voting and dispositive power over 120,488 shares and shared power over 1,261,856 shares, with certain clients sharing this power. Since the prior filing, CMU shares were sold on 4/30/26 and 5/1/26 in multiple trades, including blocks of 234,000 and 800,000 shares at prices around $3.64 per share.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
ownership
-
Rhea-AI Summary

MFS High Yield Municipal Trust: Schedule 13G/A amendment showing JPMorgan Chase Bank's position in Series 2051 preferred shares. The filing states JPMorgan Chase Bank, N.A. beneficially owns 330 Remarketable Variable Rate MuniFund Term Preferred Shares, Series 2051 (CUSIP 59318E607), representing 100% of that preferred class. Voting power is shared: JPM reports 0 sole voting power and 330 shared voting power due to a Voting Trust arrangement. The filing notes that on September 5, 2024 JPM deposited 510 RVMTP Shares into a tender option bond trust (TOB) but that the TOB does not have disposition or voting power; voting rights remain with JPM and the Voting Trust. Signature dated 05/05/2026.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
ownership
Rhea-AI Summary

MFS HIGH YIELD MUNICIPAL TRUST redeemed 180 Remarketable Variable Rate Munifund Term Preferred Shares, Series 2051, that were beneficially owned by JPMorgan Chase Bank through a trust. The redemption price was $100,000 per share, and JPMorgan now reports holding 330 of these preferred shares following the transaction.

Rhea-AI Impact
Rhea-AI Sentiment
End-of-Day
-- %
Tags
insider

FAQ

How many MFS High Yield Municipal Trust (CMU) SEC filings are available on StockTitan?

StockTitan tracks 32 SEC filings for MFS High Yield Municipal Trust (CMU), including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, and Form 4 insider trading disclosures. Each filing includes AI-generated summaries, impact scoring, and sentiment analysis.

When was the most recent SEC filing for MFS High Yield Municipal Trust (CMU)?

The most recent SEC filing for MFS High Yield Municipal Trust (CMU) was filed on June 9, 2026.