Security Snapshot

MFS HIGH YIELD MUNICIPAL TRUST - Common Stock (CMU) Institutional Ownership

CUSIP: 59318E102

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

45

Shares (Excl. Options)

12,707,626

Price

$3.58

Save this security page for your next review

Keep this CUSIP in your watchlists so you can revisit quarter changes from one place. If you create an account from here, we will bring you back after verification.

Create free account and return here Sign in and return here Review latest holder period
Type / Class
Equity / Common Stock
Symbol
CMU on NYSE
Shares outstanding
25,385,051
Price per share
$3.64
All holders as of 31 Mar 2026
Q1 2026
Total 13F shares
12,707,626
Total reported value
$45,491,444
% of total 13F portfolios
0%
Share change
+92,398
Value change
+$375,908
Number of holders
45
Price from insider filings
$3.64
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Key facts

  • CMU - MFS HIGH YIELD MUNICIPAL TRUST - Common Stock is tracked under CUSIP 59318E102.
  • 45 institutions reported positions in Q1 2026.
  • 5 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 41 to 45 between Q4 2025 and Q1 2026.
  • Reported value moved from $44,273,288 to $45,491,444.

Research use

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 45 institutions filings for Q1 2026.

Open SEC Evidence

Security key

59318E102

Latest holder period

Q1 2026

13F holders

45

13D/G owners

5

CIK / CUSIP context first

Open Q1 2026 holders CMU full holder history MFS HIGH YIELD MUNICIPAL TRUST SEC filings MFS HIGH YIELD MUNICIPAL TRUST insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Significant Owners of MFS HIGH YIELD MUNICIPAL TRUST - Common Stock (CMU) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
RIVERNORTH CAPITAL MANAGEMENT, LLC 12% +15% $10,759,658 +$1,371,825 2,955,950 +15% RIVERNORTH CAPITAL MANAGEMENT, LLC 31 Mar 2026
Almitas Capital LLC 5.9% 0% $5,451,694 -$2,530,615 1,497,718 -32% Almitas Capital LLC 31 Mar 2026
CITY OF LONDON INVESTMENT MANAGEMENT CO LTD 4.8% $4,109,866 1,234,194 City of London Investment Management Company Limited 31 Mar 2025
SIT INVESTMENT ASSOCIATES INC 4.1% -48% $3,616,876 -$3,312,255 1,045,340 -48% Sit Investment Associates, Inc. 30 Sep 2025
Bulldog Investors, LLP 1% -84% $484,812 -$5,940,986 133,190 -92% Phillip Goldstein 06 May 2026

As of 31 Mar 2026, 45 institutional investors reported holding 12,707,626 shares of MFS HIGH YIELD MUNICIPAL TRUST - Common Stock (CMU). This represents 50% of the company’s total 25,385,051 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of MFS HIGH YIELD MUNICIPAL TRUST - Common Stock (CMU) together control 49% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Bulldog Investors, LLP 14% 3,531,732 -1.7% 2.8% $12,643,601
RIVERNORTH CAPITAL MANAGEMENT, LLC 12% 2,955,950 +12% 0.53% $10,582,301
Almitas Capital LLC 5.9% 1,497,718 0% 1.2% $5,361,830
ICON ADVISERS INC/CO 2.9% 731,734 -11% 0.61% $2,619,608
MORGAN STANLEY 2.8% 710,702 +81% 0% $2,544,314
CITY OF LONDON INVESTMENT MANAGEMENT CO LTD 2.7% 676,122 +19% 0.18% $2,420,517
BANK OF AMERICA CORP /DE/ 1.6% 405,971 0% 0% $1,453,376
Allspring Global Investments Holdings, LLC 1.5% 377,111 0% 0% $1,350,057
Bank of New York Mellon Corp 1.4% 354,378 +11% 0% $1,268,675
GUGGENHEIM CAPITAL LLC 1.2% 315,595 0.01% $1,129,830
Lido Advisors, LLC 0.58% 146,367 0% 0% $523,994
UBS Group AG 0.51% 129,606 -46% 0% $463,989
MELFA WEALTH MANAGEMENT, INC. 0.49% 124,236 +0.09% 0.26% $444,763
Matisse Capital 0.39% 98,712 -62% 0.15% $353,389
EVOLVE PRIVATE WEALTH, LLC 0.36% 91,331 -1.4% 0.02% $326,965
LPL Financial LLC 0.24% 60,315 +0.54% 0% $215,928
OSAIC HOLDINGS, INC. 0.18% 46,113 -28% 0% $165,091
RAYMOND JAMES FINANCIAL INC 0.17% 43,988 -8.8% 0% $157,478
Equitable Holdings, Inc. 0.13% 33,335 +1.9% 0% $117,006
Pathstone Holdings, LLC 0.12% 30,929 0% 0% $110,726
Novak & Powell Financial Services, Inc. 0.12% 30,789 +1.4% 0.06% $110,223
Cetera Investment Advisers 0.12% 30,249 0% 0% $108,291
CITADEL ADVISORS LLC 0.11% 27,368 +49% 0% $97,977
Cambridge Investment Research Advisors, Inc. 0.1% 26,138 +0.33% 0% $94,000
BLUE BELL PRIVATE WEALTH MANAGEMENT, LLC 0.08% 20,917 -0.02% 0.01% $74,883

Institutional Holders of MFS HIGH YIELD MUNICIPAL TRUST - Common Stock (CMU) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 12,707,626 $45,491,444 +$375,908 $3.58 45
2025 Q4 12,615,228 $44,273,288 +$1,000,065 $3.51 41
2025 Q3 12,226,392 $42,418,919 +$946,743 $3.47 39
2025 Q2 11,973,151 $39,870,326 -$476,442 $3.33 38
2025 Q1 12,135,668 $42,354,332 +$3,547,407 $3.49 39
2024 Q4 11,118,467 $39,161,361 +$6,515,836 $3.52 42
2024 Q3 9,221,748 $33,794,734 +$971,393 $3.66 47
2024 Q2 8,983,657 $30,806,871 +$677,396 $3.43 52
2024 Q1 8,783,335 $29,219,055 -$911,873 $3.33 51
2023 Q4 9,045,712 $29,941,604 -$4,180,662 $3.31 50
2023 Q3 10,689,692 $33,474,788 +$3,919,146 $3.13 49
2023 Q2 9,431,187 $30,368,124 +$4,020,007 $3.22 48
2023 Q1 8,169,887 $26,220,750 +$3,115,302 $3.21 46
2022 Q4 7,222,325 $22,606,284 +$4,457,101 $3.13 46
2022 Q3 5,777,406 $17,383,146 +$1,626,972 $3.01 42
2022 Q2 5,226,511 $17,581,000 +$2,703,671 $3.36 44
2022 Q1 4,402,586 $17,035,000 +$3,934,341 $3.87 38
2021 Q4 3,383,802 $15,285,000 +$2,224,381 $4.52 36
2021 Q3 2,848,595 $13,074,000 +$3,286,914 $4.59 34
2021 Q2 2,131,877 $10,117,000 -$2,086,090 $4.75 29
2021 Q1 2,596,077 $11,589,000 +$1,254,885 $4.46 33
2020 Q4 2,294,011 $10,083,000 +$1,923,319 $4.40 33
2020 Q3 1,855,611 $7,793,000 -$598,639 $4.20 29
2020 Q2 2,004,788 $8,166,000 +$459,050 $4.07 28
2020 Q1 1,893,229 $7,991,000 -$580,434 $4.22 26
2019 Q4 1,996,352 $9,528,000 -$873,839 $4.73 30
2019 Q3 2,193,254 $10,285,000 -$526,154 $4.69 32
2019 Q2 2,304,619 $10,932,334 -$228,157 $4.73 28
2019 Q1 2,346,873 $10,913,806 +$1,492,246 $4.65 28
2018 Q4 2,049,010 $8,542,000 -$6,925 $4.17 36
2018 Q3 1,923,501 $8,751,650 -$507,608 $4.55 31
2018 Q2 2,037,408 $9,188,000 +$244,788 $4.51 31
2018 Q1 1,984,068 $8,835,000 +$616,319 $4.45 28
2017 Q4 1,836,920 $8,485,000 +$1,764,614 $4.62 30
2017 Q3 1,201,760 $5,709,000 -$1,990,049 $4.75 28
2017 Q2 1,663,030 $7,807,000 -$390,923 $4.70 29
2017 Q1 1,746,006 $8,065,000 +$99,142 $4.62 27
2016 Q4 1,726,494 $7,638,000 +$1,046,696 $4.42 24
2016 Q3 1,486,206 $7,505,857 +$203,955 $5.06 26
2016 Q2 1,469,407 $7,226,835 +$1,412,219 $4.92 29
2016 Q1 1,181,770 $5,709,000 -$869,046 $4.82 26
2015 Q4 1,377,061 $6,223,000 +$991,015 $4.51 27
2015 Q3 1,110,903 $4,860,000 -$268,987 $4.37 27
2015 Q2 1,174,962 $4,834,507 +$347,150 $4.11 29
2015 Q1 1,105,401 $4,897,936 -$1,602,123 $4.43 28
2014 Q4 1,472,061 $6,467,955 -$454,681 $4.39 34
2014 Q3 1,748,727 $7,583,008 -$1,710,238 $4.34 29
2014 Q2 1,971,057 $8,516,465 -$652,137 $4.32 26
2014 Q1 2,123,027 $9,380,545 -$108,048 $4.41 21
We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Here you can make detailed settings or revoke your consent (in part if necessary) with effect for the future. For further information, please refer to our Privacy Policy .