Advisor officer Joseph Flaherty files CMU (CMU) insider Form 4

Rhea-AI Filing Summary

MFS High Yield Municipal Trust (CMU) received a Form 4 filing from Joseph Flaherty, identified as an officer of the trust’s advisor. The filing relates to insider reporting for transactions with an earliest date of June 1, 2025. The document includes standard tables for non-derivative and derivative securities and confirms the report is filed by a single reporting person, but the excerpt does not display any specific transactions or position amounts.

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Accepted by SEC EDGAR 12/11/2025 - 08:36 AM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

X

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

FLAHERTY JOSEPH

(Last) (First) (Middle)

111 HUNTINGTON AVENUE

(Street)

BOSTON MA 02199

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MFS HIGH YIELD MUNICIPAL TRUST [ CMU ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			OFFICER OF THE ADVISOR

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	CHRISTOPHER R. BOHANE	12/11/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What does this Form 4 for MFS High Yield Municipal Trust (CMU) report?

This Form 4 reports insider information for MFS High Yield Municipal Trust. It identifies Joseph Flaherty as the reporting person and officer of the advisor, with an earliest transaction date of June 1, 2025, but the excerpt shows no specific transaction entries.

Who is the reporting person in the CMU Form 4 filing?

The reporting person is Joseph Flaherty, listed as an officer of the advisor to MFS High Yield Municipal Trust. He is not marked as a director or 10% owner, and the form is filed by this single reporting person only.

What is the earliest transaction date disclosed in this CMU Form 4?

The earliest transaction date disclosed is June 1, 2025. This date anchors when the reported insider activity first occurred, even though the excerpted tables do not detail individual non-derivative or derivative security transactions.

Does the CMU Form 4 show non-derivative or derivative securities tables?

Yes, the filing contains standard tables for both non-derivative and derivative securities. These sections define how acquisitions or dispositions would be reported, although the provided excerpt does not include any populated transaction rows or amounts.

Is Joseph Flaherty a director or 10% owner of MFS High Yield Municipal Trust (CMU)?

In this filing, Joseph Flaherty is not identified as a director or 10% owner. He is instead classified under “Other” as an officer of the advisor, indicating his role is tied to the advisory entity rather than direct issuer management.