MFS High Yield Municipal (NYSE: CMU) insiders amend share buy

Rhea-AI Filing Summary

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.

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

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^*

Bulldog Investors, LLP

(Last) (First) (Middle)

PARK 80 WEST - PLAZA TWO

250 PEHLE AVE. SUITE 708

(Street)

SADDLE BROOK NJ 07663

(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	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/20/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)
01/22/2026

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

	Form filed by One Reporting Person
X	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
Common Stock	01/20/2026		P		678	A(2)	$3.5	24,878(1)	D

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

1. Name and Address of Reporting Person^*

Bulldog Investors, LLP

(Last) (First) (Middle)

PARK 80 WEST - PLAZA TWO

250 PEHLE AVE. SUITE 708

(Street)

SADDLE BROOK NJ 07663

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

GOLDSTEIN PHILLIP

(Last) (First) (Middle)

60 HERITAGE DRIVE

(Street)

PLEASANTVILLE NY 10570

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Dakos Andrew

(Last) (First) (Middle)

250 PEHLE AVE.

SUITE 708

(Street)

SADDLE BROOK NJ 07663

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. Shares are held by Phillip Goldstein. Bulldog Investors, LLP and Andrew Dakos disclaim beneficial interest in such shares except to the extent of any pecuniary interest therein. Andrew Dakos and Phillip Goldstein are the partners of Bulldog Investors, LLP

2. This Amendment is filed solely to reflect in Column 4 of Table I, that the securities in the reported transaction were Acquired, not Disposed of.

	Bulldog Investors, LLP By: /s/ Phillip Goldstein, Partner, by Stephanie Darling as POA	01/23/2026
	/s/ Phillip Goldstein, by Stephanie Darling as POA	01/23/2026
	/s/ Andrew Dakos, by Stephanie Darling as POA	01/23/2026
	** 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 insider transaction did CMU report in this amended Form 4/A?

The filing reports that Phillip Goldstein purchased 678 shares of MFS High Yield Municipal Trust (CMU) common stock at $3.50 per share on 01/20/2026.

How many CMU shares does Phillip Goldstein own after this transaction?

After the reported purchase, Phillip Goldstein beneficially owned 24,878 shares of MFS High Yield Municipal Trust common stock directly.

Who are the reporting persons in this CMU Form 4/A filing?

The reporting persons are Bulldog Investors, LLP, Phillip Goldstein, and Andrew Dakos, who are identified as having a reporting relationship with MFS High Yield Municipal Trust (CMU).

What correction does this amendment make to the original CMU Form 4?

The amendment states it is filed solely to correct Column 4 of Table I so that the transaction is shown as Acquired (A), rather than Disposed of (D).

How is beneficial ownership of the CMU shares characterized in the filing?

A footnote explains that the shares are held by Phillip Goldstein, and that Bulldog Investors, LLP and Andrew Dakos disclaim beneficial interest in those shares except to the extent of any pecuniary interest.

What is the relationship of the reporting persons to MFS High Yield Municipal Trust (CMU)?

The reporting persons are identified as having the role of Director with respect to MFS High Yield Municipal Trust (CMU), as indicated in the relationship section.