Filing Details

Accession Number:
0001398344-24-000039
Form Type:
13D Filing
Publication Date:
2024-01-01 19:00:00
Filed By:
Bulldog Investors
Company:
Mfs High Yield Municipal Trust (NYSE:CMU)
Filing Date:
2024-01-02
SEC Url:
13D Filing
Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
Bulldog Investors, LLP 0 1,401,848 0 1,401,848 5.50%
Phillip Goldstein 0 2,100,594 0 2,100,594 8.24%
Andrew Dakos 0 2,100,594 0 2,100,594 8.24%
Filing

SCHEDULE 13D/A


DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT
12/28/29

1. NAME OF REPORTING PERSON
Bulldog Investors, LLP


2. CHECK THE BOX IF MEMBER OF A GROUP                  a[]

                                                       b[]

3. SEC USE ONLY

4. SOURCE OF FUNDS
WC


5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) AND 2(e)                        []

6. CITIZENSHIP OR PLACE OF ORGANIZATION
DE
___________________________________________________________


7. SOLE VOTING POWER
0

8. SHARED VOTING POWER
1,401,848

9. SOLE DISPOSITIVE POWER
0
_______________________________________________________

10. SHARED DISPOSITIVE POWER
1,401,848


11. AGGREGATE AMOUNT OWNED BY EACH REPORTING PERSON
1,401,848 (Footnote 1)

12. CHECK IF THE AGGREGATE AMOUNT EXCLUDES CERTAIN SHARES

[]
___________________________________________________________


13. PERCENT OF CLASS REPRESENTED BY ROW 11
5.50%

14. TYPE OF REPORTING PERSON

IA

___________________________________________________________


1. NAME OF REPORTING PERSON
Phillip Goldstein


2. CHECK THE BOX IF MEMBER OF A GROUP                  a[]

                                                       b[]

3. SEC USE ONLY

4. SOURCE OF FUNDS
WC


5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) AND 2(e)                        []

6. CITIZENSHIP OR PLACE OF ORGANIZATION
USA
___________________________________________________________


7. SOLE VOTING POWER
0

8. SHARED VOTING POWER
2,100,594

9. SOLE DISPOSITIVE POWER
0
_______________________________________________________

10. SHARED DISPOSITIVE POWER
2,100,594


11. AGGREGATE AMOUNT OWNED BY EACH REPORTING PERSON
2,100,594 (Footnote 1)

12. CHECK IF THE AGGREGATE AMOUNT EXCLUDES CERTAIN SHARES

[]
___________________________________________________________


13. PERCENT OF CLASS REPRESENTED BY ROW 11

8.24%


14. TYPE OF REPORTING PERSON

IN

___________________________________________________________
1. NAME OF REPORTING PERSON
Andrew Dakos


2. CHECK THE BOX IF MEMBER OF A GROUP                  a[]

                                                       b[]

3. SEC USE ONLY

4. SOURCE OF FUNDS
WC


5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
PURSUANT TO ITEMS 2(d) AND 2(e)                        []

6. CITIZENSHIP OR PLACE OF ORGANIZATION
USA
___________________________________________________________


7. SOLE VOTING POWER
0

8. SHARED VOTING POWER
2,100,594

9. SOLE DISPOSITIVE POWER
0
_______________________________________________________

10. SHARED DISPOSITIVE POWER
2,100,594


11. AGGREGATE AMOUNT OWNED BY EACH REPORTING PERSON
2,100,594 (Footnote 1)

12. CHECK IF THE AGGREGATE AMOUNT EXCLUDES CERTAIN SHARES

[]
___________________________________________________________


13. PERCENT OF CLASS REPRESENTED BY ROW 11

8.24%


14. TYPE OF REPORTING PERSON

IN

___________________________________________________________


Item 1. SECURITY AND ISSUER

This Constitutes Amendment #3 to the schedule 13d filed
July 17, 2023. Except as specifically set forth herein,
the Schedule 13d remaines unmodified




ITEM 5. INTEREST IN SECURITIES OF THE ISSUER
(a) As per the N-CSRS filed on 7/18/23 there were 28,325,314 shares of
common stock outstanding as of 5/31/23. On 11/16/23 2,832,532 shares were
tendered leaving 25,492,782 shares outstanding. The percentages set forth
herein were derived using such number. Phillip Goldstein and Andrew Dakos
own Bulldog Investors, LLP, a registered investment advisor. As of
December 29, 2023 Bulldog Investors, LLP is deemed to be the beneficial
owner of 1,401,848 shares of CMU (representing 5.50% of CMU's outstanding
shares) solely by virtue of Bulldog Investors LLP's power to direct the
vote of,and dispose of, these shares.
As of December 29, 2023, each of Messrs. Goldstein and Dakos is deemed to be
the beneficial owner of 2,100,594 shares of CMU (representing 8.24% of CMU's
outstanding shares) by virtue of their power to direct the vote of, and
dispose of, these shares.

(b)Bulldog Investors,LLP has sole power to dispose of and vote 0 shares.
Bulldog Investors, LLP has shared power to dispose of and vote 1,401,848
shares. Certain of Bulldog Investors, LLP's clients (none of whom
beneficially own more than 5% of CMU's shares) share this power with
Bulldog Investors, LLP. Messrs. Goldstein and Dakos are partners of Bulldog
Investors, LLP. Messrs. Goldstein and Dakos have shared power to dispose
of and vote an additional 698,746 shares.


c) Since the last filing on 11/17/23 the following shares of CMU were bought
   and sold.

Date			Shares		 Price
11/30/2023		7,950		3.1700
12/4/2023		10,000		 3.2100
12/5/2023		10,700		 3.2000
12/11/2023		7,800		3.2100
12/12/2023		247		3.2100
12/13/2023		3,588		3.2100
12/15/2023		4,500		3.2700
12/18/2023		1,800		 3.2800
12/21/2023		24,500		3.2988
12/21/2023		26,820		 3.2900
12/22/2023		23,700		3.2952
12/22/2023		5,000		 3.2900
12/26/2023		14,629		3.3045
12/27/2023		713		 3.3000
12/27/2023		(2,226)		 3.3100
12/28/2023		85,131		 3.3000
12/28/2023		20,000		 3.3000
12/29/2023		10,000		 3.3000
12/29/2023		117,837		 3.3000




d) Clients of Bulldog Investors, LLP and a closed-end investment company
for which Messrs. Goldstein and Dakos have investment authority are
entitled to receive any dividends or sales proceeds.

e) N/A

ITEM 6. CONTRACTS,ARRANGEMENTS,UNDERSTANDINGS OR RELATIONSHIPS
WITH RESPECT TO SECURITIES OF THE ISSUER.
None

ITEM 7. MATERIAL TO BE FILED AS EXHIBITS
None


After reasonable inquiry and to the best of my knowledge
and belief, I certify that the information set forth in this
statement is true, complete and correct.

Dated: 01/02/2024

By: /S/ Phillip Goldstein
Name:   Phillip Goldstein

By: /S/ Andrew Dakos
Name:   Andrew Dakos

Bulldog Investors, LLP
By: /s/ Andrew Dakos
Andrew Dakos, Partner

Footnote 1: The reporting persons disclaim beneficial ownership except
to the extent of any pecuniary interest therein.