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.
MFS High Yield Municipal Trust (NYSE: CMU) is a diversified, closed-end management investment company that seeks high current income exempt from federal income tax by investing primarily in tax-exempt bonds and tax-exempt notes. As a registered investment company with listed common shares and preferred shares, its regulatory disclosures are an important resource for understanding its portfolio, leverage, and governance.
Although specific SEC filings are not listed here, public announcements reference documents such as tender offer statements on Schedule TO, which include the offer to purchase, letter of transmittal, and related materials for cash tender offers covering up to 10% of the fund’s outstanding common shares. These filings describe the terms of each tender offer, including pricing at a stated percentage of net asset value per share, conditions for acceptance, and procedures for prorating shares when tenders exceed the offer size.
Other regulatory-related communications discuss the fund’s Remarketable Variable Rate MuniFund Term Preferred Shares, Series 2051 (Series 2051 RVMTP Shares). Optional partial redemptions of these preferred shares, completed at their liquidation preference plus unpaid dividends and other distributions, affect the fund’s leverage attributable to preferred shares. Details of such actions are typically supported by formal notices and associated regulatory documentation.
On Stock Titan’s SEC filings page for CMU, investors can access the fund’s available regulatory documents as they are posted to the U.S. Securities and Exchange Commission’s EDGAR system. Stock Titan enhances this information with AI-powered summaries that explain the key points of lengthy filings in plain language, highlight material terms in tender offers, and clarify how preferred share redemptions and other actions may influence the fund’s structure.
By reviewing these filings and AI-generated insights together, users can better understand MFS High Yield Municipal Trust’s investment focus on tax-exempt bonds and notes, its use of preferred shares and leverage, and the formal terms governing tender offers and other corporate actions.
MFS High Yield Municipal Trust (CMU) received an updated Schedule 13D/A from Bulldog Investors, LLP, Phillip Goldstein and Andrew Dakos reflecting their current ownership stakes. Based on 25,492,782 CMU shares outstanding as of 11/30/25, Phillip Goldstein is deemed to beneficially own 3,455,205 shares, or 13.55% of the common stock. Bulldog Investors, LLP is deemed to beneficially own 3,072,220 shares, or 12.05%, while Andrew Dakos is deemed to beneficially own 2,957,332 shares, or 11.60%. The filing notes that Bulldog has sole voting and dispositive power over 120,488 shares and shared power over 2,951,732 shares, with certain clients sharing this power. It also lists recent CMU trading activity over the last 60 days, including purchases and sales around the mid-$3.60 price range.
MFS High Yield Municipal Trust commenced a self-tender offer to purchase for cash up to 50% (12,746,391 shares) of its outstanding common shares. The price payable is 99% of net asset value per share as of the Expiration Date plus any unpaid dividends accrued through May 5, 2026. The Offer commenced on April 6, 2026 and the Schedule TO amendment reports this tender offer and attaches the Offer to Purchase and Letter of Transmittal.
MFS HIGH YIELD MUNICIPAL TRUST submitted a Form 4 identifying Geoffrey Schechter as a reporting person with the role of portfolio manager. The summary data in this filing shows no reported purchases, sales, exercises, gifts, tax withholdings, or other share transactions.
MFS High Yield Municipal Trust has released preliminary communications describing a planned tender offer to purchase for cash up to 50% of the Fund’s outstanding common shares. The announcement states the Offer has not commenced and that the Fund intends to file a Schedule TO with full tender offer documents, including a letter of transmittal.
The communication is informational only and is not an offer or solicitation; timing and final terms are subject to the Fund’s planned filings.
Almitas Capital LLC filed a Schedule 13G reporting beneficial ownership of common shares of MFS High Yield Municipal Trust. The filing states that the position is held in the ordinary course of business and not for the purpose of changing or influencing control of the fund.
MFS High Yield Municipal Trust insiders filed an amended Form 4 after correcting how a recent trade was reported. On 01/20/2026, Phillip Goldstein purchased 678 shares of common stock at $3.50 per share. Following this transaction, he beneficially owned 24,878 shares directly.
The filing is made by Bulldog Investors, LLP, Phillip Goldstein, and Andrew Dakos. A footnote explains that the shares are held by Phillip Goldstein and that Bulldog Investors, LLP and Andrew Dakos disclaim beneficial interest in these shares except to the extent of any pecuniary interest. The amendment is specifically to show in Table I that the securities were acquired, not disposed of, in the reported transaction.
MFS High Yield Municipal Trust generated a total return of 0.54% at net asset value and 2.11% at market price for the 12 months ended November 30, 2025, compared with 2.64% for the Bloomberg Municipal Bond Index. The fund benefited from falling interest rates, with longer duration and yield-curve positioning helping results, but it lagged the benchmark due to weaker security selection in transportation and power, exposure to non-rated bonds, and an overweight in health care.
The portfolio is concentrated in municipal sectors such as hospitals, long-term care, airports, education, and housing, and holds a mix of investment grade and below investment grade bonds. The fund uses leverage through preferred shares and tender option bonds; as of November 30, 2025, it needed a 1.47% net portfolio return to cover leverage costs. Michael Dawson and Jason Kosty serve as portfolio managers, with Geoffrey Schechter stepping off the team effective September 30, 2025.
Phillip Goldstein, a reporting person for MFS High Yield Municipal Trust (CMU), purchased additional common shares of the fund. On January 20, 2026, he bought 678 shares of common stock at $3.50 per share, increasing his directly held position to 24,878 shares after the transaction.
The shares are held by Phillip Goldstein. Bulldog Investors, LLP and Andrew Dakos disclaim beneficial interest in these shares except to the extent of any pecuniary interest, and Andrew Dakos and Phillip Goldstein are partners of Bulldog Investors, LLP.
MFS High Yield Municipal Trust insider filing shows no current stake. An initial Form 3 for MFS High Yield Municipal Trust (ticker CMU) reports that Thomas P. Murphy, identified as a director of the fund’s advisor, does not beneficially own any of the trust’s securities. The filing explicitly states that no securities are beneficially owned, and there are no non-derivative or derivative holdings listed.