Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  CITIGROUP INC
 2. Date of Event Requiring Statement (Month/Day/Year)
03/24/2016		 3. Issuer Name and Ticker or Trading Symbol
MFS HIGH YIELD MUNICIPAL TRUST [CMU]
(Last)
(First)
(Middle)
388 GREENWICH STREET		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

NEW YORK, NY 10013		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Variable Rate Municipal Term Preferred Shares Series 2019/3 3,000 (1)
I
By Subsidiary (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
CITIGROUP INC
388 GREENWICH STREET
NEW YORK, NY 10013		     X    

Signatures

Citigroup Inc., By: /s/ Ali L. Karshan, Assistant Secretary 04/06/2016
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) Citibank, N.A. purchased this new series of Variable Rate Municipal Term Preferred Shares of CUSIP 59318E508 from the issuer on March 24,2016. Citibank, N.A. previously owned 2,844 shares of CUSIP 59318E300 which were redeemed by the issuer on March 24, 2016.
(2) These shares of CUSIP 59318E508 are beneficially owned by Citibank, N.A.("Citibank"). Citicorp is the sole stockholder of Citibank. Citigroup Inc. is the sole stockholder of Citicorp.

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