Stocks
CMU Mfs High Yield Municipal Trust

CMU

Mfs High Yield Municipal Trust

Company with tickers: CMU

CIK

809844

CUSIP

59318E102

Shares Outstanding

25,492,782

Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades

Report Date:

Holders: 40

Total Value: $42,682,493

Total Shares: 12,160,261

Institutional Ownership Trend

24 quarters

Holder Concentration

Across 40 13F filers · Δ vs Sep 30, 2025

Top Holder

29.6%

+4.7 pts

Top 5

74.9%

+0.7 pts

Top 10

90.7%

−0.2 pts

HHI

1,622

Moderately concentrated +201

Quarterly Activity

vs Sep 30, 2025

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +2

Institutional value: +2.0%

Shares held: +0.8%

Top Buyers

vs Sep 30, 2025

Institution	Added	Now Holds
Small Bulldog Investors, LLC	+598,697	3,593,657
Mid RiverNorth Capital Management, LLC	+51,821	2,630,896
Small CITY OF LONDON INVESTMENT MANAGEMENT CO LTD	+50,000	568,249
Large Advisor Group Holdings, Inc.	+18,521	48,223
Small Thomas J. Herzfeld Advisors, Inc.	+12,171	558,611

Top Sellers

vs Sep 30, 2025

Institution	Sold	Now Holds
Mega MORGAN STANLEY	−96,370	1
Mega CITADEL ADVISORS LLC	−10,765	18,396
Mega UBS Group AG	−10,523	238,830
Small Almitas Capital LLC	−9,450	1,497,718
Large Cetera Investment Advisers	−5,408	30,249

Top New Positions

vs Sep 30, 2025

Institution	Acquired	Value (USD)
Mega BANK OF AMERICA CORP /DE/	405,971	$1,424,957
Mid EVOLVE PRIVATE WEALTH, LLC	92,603	$325,036
Micro Novak & Powell Financial Services, Inc.	30,365	$106,581
Mid Mutual Advisors, LLC	20,998	$73,702
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	13,703	$48,097

Top Sold-Out Positions

vs Sep 30, 2025

Institution	Previously Held	Last Value (USD)
Mid SIT INVESTMENT ASSOCIATES INC	1,045,340	$3,627,329
Mid Private Advisor Group, LLC	19,093	$66,252
Large NOMURA HOLDINGS INC	10,000	$34,700
Mega ROYAL BANK OF CANADA	2,955	$10,253

40 of 40 shown

All Common Calls Puts

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Holder	Value (USD)	% of 13F	Shares	Change	Type	Discretion	Filed	Action
Small Bulldog Investors, LLC	$12,613,736	29.55%	3,593,657	+20.0%	Shares	Sole	2026-02-13	View
Mid RiverNorth Capital Management, LLC	$9,234,444	21.64%	2,630,896	+2.0%	Shares	Sole	2026-02-17	View
Small Almitas Capital LLC	$5,256,990	12.32%	1,497,718	-0.6%	Shares	Sole	2026-02-17	View
Small ICON ADVISERS INC/CO	$2,883,310	6.76%	821,456	0.0%	Shares	Sole	2026-02-13	View
Small CITY OF LONDON INVESTMENT MANAGEMENT CO LTD	$1,994,553	4.67%	568,249	+9.6%	Shares	Sole	2026-02-13	View
Small Thomas J. Herzfeld Advisors, Inc.	$1,960,724	4.59%	558,611	+2.2%	Shares	Sole	2026-02-13	View
Mega BANK OF AMERICA CORP /DE/	$1,424,957	3.34%	405,971	New	Shares	Defined	2026-02-17	View
Large Allspring Global Investments Holdings, LLC	$1,323,659	3.10%	377,111	0.0%	Shares	Defined	2026-01-15	View
Mega Bank of New York Mellon Corp	$1,117,636	2.62%	318,415	+1.9%	Shares	Defined	2026-02-10	View
Small Matisse Capital	$920,350	2.16%	262,208	0.0%	Shares	Sole	2026-01-29	View
Mega UBS Group AG	$838,292	1.96%	238,830	-4.2%	Shares	Defined	2026-01-29	View
Large Lido Advisors, LLC	$513,748	1.20%	146,367	0.0%	Shares	Sole	2026-02-10	View
Micro MELFA WEALTH MANAGEMENT, LLC	$435,671	1.02%	124,123	+0.1%	Shares	Sole	2026-01-16	View
Mid EVOLVE PRIVATE WEALTH, LLC	$325,036	0.76%	92,603	New	Shares	Sole	2026-02-17	View
Mega LPL Financial LLC	$210,571	0.49%	59,992	-0.8%	Shares	Sole	2026-02-11	View
Large Advisor Group Holdings, Inc.	$169,262	0.40%	48,223	+62.4%	Shares	Defined	2026-02-17	View
Mega RAYMOND JAMES FINANCIAL INC	$169,241	0.40%	48,217	-0.1%	Shares	Defined	2026-02-18	View
Mid Equitable Holdings, Inc.	$114,861	0.27%	32,724	+0.9%	Shares	Defined	2026-02-17	View
Large Pathstone Holdings, LLC	$108,560	0.25%	30,929	+11.5%	Shares	Sole	2026-02-13	View
Micro Novak & Powell Financial Services, Inc.	$106,581	0.25%	30,365	New	Shares	Sole	2026-02-10	View
Large Cetera Investment Advisers	$106,173	0.25%	30,249	-15.2%	Shares	Sole	2026-02-17	View
Large Cambridge Investment Research Advisors, Inc.	$91,439	0.21%	26,051	+0.3%	Shares	Sole	2026-02-05	View
Mid Mutual Advisors, LLC	$73,702	0.17%	20,998	New	Shares	Sole	2026-02-02	View
Small BLUE BELL PRIVATE WEALTH MANAGEMENT, LLC	$73,432	0.17%	20,921	-4.6%	Shares	Sole	2026-02-09	View
Large Rockefeller Capital Management L.P.	$70,200	0.16%	20,000	0.0%	Shares	Defined	2026-02-17	View
Mega CITADEL ADVISORS LLC	$64,569	0.15%	18,396	-36.9%	Shares	Defined	2026-02-17	View
Small SPIREPOINT PRIVATE CLIENT, LLC	$57,026	0.13%	16,247	0.0%	Shares	Sole	2026-01-22	View
Micro Noble Wealth Management PBC	$53,001	0.12%	15,100	0.0%	Shares	Sole	2026-01-05	View
Large COHEN & STEERS, INC.	$52,650	0.12%	15,000	0.0%	Shares	Sole	2026-02-13	View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	$48,097	0.11%	13,703	New	Shares	Other	2026-02-17	View
Small Closed-End Fund Advisors, Inc.	$45,949	0.11%	13,091	New	Shares	Sole	2026-02-11	View
Mid INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC	$45,152	0.11%	12,864	-2.2%	Shares	Sole	2026-02-03	View
Large Kestra Advisory Services, LLC	$44,773	0.10%	12,756	0.0%	Shares	Sole	2026-02-13	View
Mid Integrated Wealth Concepts LLC	$41,052	0.10%	11,696	-28.0%	Shares	Sole	2026-02-13	View
Mid Mesirow Financial Investment Management, Inc.	$40,972	0.10%	11,673	+1.4%	Shares	Sole	2026-02-05	View
Mega WELLS FARGO & COMPANY/MN	$33,727	0.08%	9,609	+46.8%	Shares	Defined	2026-02-13	View
Small Independence Bank of Kentucky	$10,038	0.02%	2,860	-42.9%	Shares	Sole	2026-01-20	View
Mid ROTHSCHILD INVESTMENT LLC	$5,394	0.01%	1,537	0.0%	Shares	Sole	2026-02-10	View
Micro Mascoma Wealth Management LLC	$2,962	0.01%	844	0.0%	Shares	Sole	2026-02-04	View
Mega MORGAN STANLEY	$3	0.00%	1	-100.0%	Shares	Defined	2026-02-13	View
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