MFS High Yield Municipal Trust
US ˙ NYSE ˙ US59318E1029

SecurityCMU / MFS High Yield Municipal Trust
InstitutionLPL Financial LLC
Latest Disclosed Ownership60,315 shares
Latest Disclosed Value $ 215,928
LPL Financial LLC reports 0.54% increase in ownership of CMU / MFS High Yield Municipal Trust

On May 6, 2026 - LPL Financial LLC filed a 13F-HR form disclosing ownership of 60,315 shares of MFS High Yield Municipal Trust (US:CMU) valued at $215,928 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 59,992 shares of MFS High Yield Municipal Trust. This represents a change in shares of 0.54% during the quarter. The current value of the position is $202,658 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-06 2026-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 60,315 323 0.54 216 2.38 0.0001
2026-02-11 2025-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 59,992 -473 -0.78 211 0.48 0.0001
2025-11-12 2025-09-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 60,465 21,697 55.97 210 62.02 0.0001
2025-08-12 2025-06-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 38,768 -14,625 -27.39 129 -30.65 0.0000
2025-05-07 2025-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 53,393 271 0.51 186 0.00 0.0001
2025-02-11 2024-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 53,122 1,092 2.10 187 -2.11 0.0001
2024-11-08 2024-09-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 52,030 -13,871 -21.05 191 -15.93 0.0001
2024-08-07 2024-06-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 65,901 2,344 3.69 226 7.11 0.0001
2024-05-10 2024-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 63,557 -18,204 -22.26 212 -21.85 0.0001
2024-02-14 2023-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 81,761 -5,358 -6.15 271 -0.74 0.0002
2023-11-13 2023-09-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 87,119 15,441 21.54 273 18.26 0.0002
2023-07-31 2023-06-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 71,678 -12,562 -14.91 231 -14.81 0.0002
2023-05-10 2023-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 84,240 -19,826 -19.05 270 -16.92 0.0002
2023-02-07 2022-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 104,066 -15,482 -12.95 326 -9.72 0.0003
2022-11-14 2022-09-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 119,548 36,322 43.64 360 28.57 0.0003
2022-08-12 2022-06-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 83,226 -13,595 -14.04 280 -25.33 0.0003
2022-05-16 2022-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 96,821 25,297 35.37 375 16.10 0.0003
2022-02-14 2021-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 71,524 2,146 3.09 323 1.57 0.0003
2021-11-15 2021-09-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 69,378 9,516 15.90 318 11.97 0.0003
2021-08-13 2021-06-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 59,862 5,510 10.14 284 17.36 0.0003
2021-05-14 2021-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 54,352 -1,399 -2.51 242 -1.22 0.0003
2021-02-12 2020-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 55,751 4,200 8.15 245 12.90 0.0003
2020-11-09 2020-09-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 51,551 8,036 18.47 217 22.60 0.0003
2020-08-13 2020-06-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 43,515 -200 -0.46 177 -3.80 0.0003
2020-05-14 2020-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 43,715 9,929 29.39 184 15.00 0.0004
2020-02-14 2019-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 33,786 0 0.00 160 1.27 0.0003
2019-11-13 2019-09-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 33,786 0 0.00 158 -1.25 0.0003
2019-08-09 2019-06-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 33,786 -2,800 -7.65 160 -5.88 0.0003
2019-05-08 2019-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 36,586 0 0.00 170 11.11 0.0004
2019-02-07 2018-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 36,586 -3,500 -8.73 153 -15.93 0.0004
2018-11-14 2018-09-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 40,086 -203 -0.50 182 0.00 0.0004
2018-08-14 2018-06-30 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 40,289 8,624 27.24 182 29.08 0.0005
2018-05-15 2018-03-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 31,665 100 0.32 141 -3.42 0.0004
2018-02-14 2017-12-31 13F MFS HIGH YIELD MUN TR SH BEN INT 59318E102 31,565 31,565 146 0.0004
2016-11-16 2016-09-30 13F MFS HIGH SH BEN INT 59318E102 0 -28,909 -100.00 0 -100.00
2016-08-15 2016-06-30 13F MFS HIGH SH BEN INT 59318E102 28,909 -21,309 -42.43 142 -42.04 0.0012
2016-05-16 2016-03-31 13F MFS HIGH SH BEN INT 59318E102 50,218 -400 -0.79 245 6.06 0.0007
2016-02-12 2015-12-31 13F MFS HIGH SH BEN INT 59318E102 50,618 13,301 35.64 231 40.85 0.0006
2015-11-13 2015-09-30 13F MFS HIGH SH BEN INT 59318E102 37,317 -1,070 -2.79 164 3.14 0.0009
2015-08-14 2015-06-30 13F MFS HIGH SH BEN INT 59318E102 38,387 0 0.00 159 -7.56 0.0008
2015-05-14 2015-03-31 13F MFS HIGH SH BEN INT 59318E102 38,387 -740 -1.89 172 0.00 0.0009
2015-02-13 2014-12-31 13F MFS HIGH SH BEN INT 59318E102 39,127 -2,000 -4.86 172 -3.91 0.0009
2014-11-10 2014-09-30 13F MFS HIGH SH BEN INT 59318E102 41,127 -1,000 -2.37 179 -1.65 0.0011
2014-08-05 2014-06-30 13F/A-1 MFS HIGH SH BEN INT 59318E102 42,127 -956 -2.22 182 -4.21 0.0011
2014-08-05 2014-06-30 13F MFS HIGH SH BEN INT 59318E102 42,127 1,693
2014-05-12 2014-03-31 13F MFS HIGH SH BEN INT 59318E102 43,083 16,197 60.24 190 71.17 0.0012
2014-02-13 2013-12-31 13F MFS HIGH SH BEN INT 59318E102 26,886 -16,544 -38.09 111 -36.93 0.0007
2013-11-04 2013-09-30 13F MFS HIGH SH BEN INT 59318E102 43,430 -81,596 -65.26 176 -68.35 0.0012
2013-08-15 2013-06-30 13F MFS HIGH SH BEN INT 59318E102 125,026 125,026 556 0.0040
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.