MFS High Yield Municipal Trust (NYSE: CMU) files Form 25 to delist

Rhea-AI Filing Summary

MFS High Yield Municipal Trust notified the New York Stock Exchange that its Common Shares of Beneficial Interest will be removed from listing and/or registration under Section 12(b) of the Exchange Act.

The Exchange certified compliance with rule 12d2-2 procedures and the issuer certified compliance with Exchange rules for a voluntary withdrawal. The filing is a procedural notice of delisting/withdrawal.

Insights

Exchange Compliance Counsel

Delisting/withdrawal certified by NYSE under Section 12(b).

The Exchange executed Form 25 to effect removal of Common Shares of Beneficial Interest for the issuer named, citing compliance with 17 CFR 240.12d2-2 procedures. The filing identifies the action as a voluntary withdrawal under Exchange rules.

Key dependencies are procedural: the certification by the Exchange and the issuer's compliance statements. Subsequent public filings or disclosures may describe timing, method, or holder effects.

Key Figures

Commission File Number: 001-09432 Form expiration date: March 31, 2018 Issuer principal zip code: 02199

3 metrics

Commission File Number 001-09432 Form 25 cover reference

Form expiration date March 31, 2018 Expires line on the form

Issuer principal zip code 02199 Issuer address in filing

Key Terms

Form 25, Section 12(b), 17 CFR 240.12d2-2

3 terms

Form 25 regulatory

"FORM 25 NOTIFICATION OF REMOVAL FROM LISTING AND/OR REGISTRATION"

A Form 25 is an official filing with the U.S. Securities and Exchange Commission used to remove a company's stock or other security from a national exchange list. Investors should care because delisting often means less visibility, lower trading volume and wider price swings—similar to a product moving from a major supermarket to a small local market, which can make buying, selling and valuing the security more difficult.

Section 12(b) regulatory

"REMOVAL FROM LISTING AND/OR REGISTRATION UNDER SECTION 12(b) OF THE SECURITIES EXCHANGE ACT"

Section 12(b) of the U.S. Securities Exchange Act requires securities listed on a national stock exchange to be registered with the U.S. Securities and Exchange Commission (SEC) and to follow regular public reporting and disclosure rules. For investors, a 12(b) listing generally means more routine financial updates, regulatory oversight and easier buying and selling—like a storefront that must display its inventory and prices, making it simpler to inspect and trade the product.

17 CFR 240.12d2-2 regulatory

"Pursuant to 17 CFR 240.12d2-2(b), the Exchange has complied with its rules"

A U.S. Securities and Exchange Commission rule that describes the conditions and procedural steps for a security to be removed from public registration or reporting under the Securities Exchange Act of 1934. For investors, it matters because it explains when a company’s shares can stop being subject to regular disclosure and exchange listing rules — similar to knowing when a publicly tracked product will be discontinued and no longer send updates, which affects transparency and liquidity.

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UNITED STATES

OMB APPROVAL

OMB Number:			3235-0080
Expires:	March 31, 2018
Estimated average burden
hours per response:			1.7

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 25

NOTIFICATION OF REMOVAL FROM LISTING AND/OR REGISTRATION
UNDER SECTION 12(b) OF THE SECURITIES EXCHANGE ACT OF 1934.

Commission File Number

001-09432

Issuer:	MFS HIGH YIELD MUNICIPAL TRUST
Exchange:	NEW YORK STOCK EXCHANGE LLC

(Exact name of Issuer as specified in its charter, and name of Exchange where security is listed and/or registered)

Address:	111 HUNTINGTON AVE
	Boston	MASSACHUSETTS	02199
Telephone number:

(Address, including zip code, and telephone number, including area code, of Issuer's principal executive offices)

Common Shares of Beneficial Interest

(Description of class of securities)

Please place an X in the box to designate the rule provision relied upon to strike the class of securities from listing and registration:

17 CFR 240.12d2-2(a)(1)

17 CFR 240.12d2-2(a)(2)

17 CFR 240.12d2-2(a)(3)

17 CFR 240.12d2-2(a)(4)

Pursuant to 17 CFR 240.12d2-2(b), the Exchange has complied with its rules to strike the class of securities from listing and/or withdraw registration on the Exchange. ¹

Pursuant to 17 CFR 240.12d2-2(c), the Issuer has complied with its rules of the Exchange and the requirements of 17 CFR 240.12d-2(c) governing the voluntary withdrawal of the class of securities from listing and registration on the Exchange.

Pursuant to the requirements fo the Securities Exchange Act of 1934, NEW YORK STOCK EXCHANGE LLC certifies that it has reasonable grounds to believe that it meets all of the requirements for filing the Form 25 and has caused this notification to be signed on its behalf by the undersigned duly authorized person.

2026-06-08	By	Tyler Mastronardi		Analyst, Market Watch
Date		Name		Title

¹ Form 25 and attached Notice will be considered compliance with the provisions of 17 CFR 240.19d-1 as applicable. See General Instructions.

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 the Form 25 for MFS High Yield Municipal Trust (CMU) mean?

It notifies the SEC and market that the issuer's common shares will be removed from NYSE listing. The Exchange and issuer certified compliance with 17 CFR 240.12d2-2 procedures for voluntary withdrawal.

Who certified the delisting for CMU?

The New York Stock Exchange LLC certified it had reasonable grounds to file Form 25. The issuer also certified compliance with Exchange rules for the voluntary withdrawal as stated in the notice.

Does the Form 25 state when trading will stop for CMU?

The provided excerpt does not specify a trading halt or effective delisting date. The filing is a procedural notification citing compliance with the applicable withdrawal rules.

What class of security is affected in this CMU filing?

The filing lists Common Shares of Beneficial Interest as the class of securities to be removed from listing and/or registration under Section 12(b) of the Exchange Act.