Western Asset Municipal High Income Fund Inc.
US ˙ NYSE ˙ US95766N1037

SecurityMHF / Western Asset Municipal High Income Fund Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership372,813 shares
Latest Disclosed Value $ 2,587,328
Morgan Stanley reports 5.70% increase in ownership of MHF / Western Asset Municipal High Income Fund Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 372,813 shares of Western Asset Municipal High Income Fund Inc. (US:MHF) valued at $2,587,322 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 352,696 shares of Western Asset Municipal High Income Fund Inc.. This represents a change in shares of 5.70% during the quarter. The current value of the position is $2,553,769 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)
2026-05-15 2026-03-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 372,813 20,117 5.70 2,587 6.64 0.0002
2026-05-27 2025-12-31 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 352,696 -2,582 -0.73 2,427 -5.53 0.0001
2026-02-13 2025-12-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 352,696 -2,582 2,427 0.0001
2026-05-27 2025-09-30 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 355,278 -76,907 -17.79 2,569 -14.49 0.0002
2025-11-14 2025-09-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 355,278 -76,907 2,569 0.0002
2025-08-15 2025-06-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 432,185 -31,332 -6.76 3,004 -12.55 0.0002
2025-05-15 2025-03-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 463,517 -1,107 -0.24 3,435 8.71 0.0002
2025-05-15 2024-12-31 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 464,624 -57,990 -11.10 3,159 -16.38 0.0002
2025-02-14 2024-12-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 464,624 -57,990 3,159 0.0002
2025-05-14 2024-09-30 13F/A-2 WESTERN ASSET MUN HIGH INCOM COM 95766N103 522,614 22,525 4.50 3,779 11.45 0.0003
2025-02-14 2024-09-30 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 522,614 22,525 3,779 0.0003
2024-11-14 2024-09-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 522,614 22,525 3,779 0.0000
2025-05-14 2024-06-30 13F/A-2 WESTERN ASSET MUN HIGH INCOM COM 95766N103 500,089 -30,827 -5.81 3,391 -5.94 0.0003
2024-10-17 2024-06-30 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 500,089 -30,827 3,391 0.0003
2024-08-14 2024-06-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 500,089 -30,827 3,391 0.0003
2024-10-17 2024-03-31 13F/A-2 WESTERN ASSET MUN HIGH INCOM COM 95766N103 530,916 -21,440 -3.88 3,605 1.64 0.0003
2024-08-16 2024-03-31 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 530,916 -21,440 3,605 0.0000
2024-05-15 2024-03-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 530,916 -21,440 3,605 0.0003
2024-08-16 2023-12-31 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 552,356 -18,135 -3.18 3,546 2.07 0.0003
2024-02-13 2023-12-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 552,356 -18,135 3,546 0.0003
2023-11-15 2023-09-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 570,491 -57,128 -9.10 3,474 -15.47 0.0004
2023-08-14 2023-06-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 627,619 -3,052 -0.48 4,111 -2.28 0.0004
2023-05-15 2023-03-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 630,671 -27,672 -4.20 4,207 0.14 0.0005
2023-02-14 2022-12-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 658,343 135,235 25.85 4,200 29.51 0.0005
2022-11-14 2022-09-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 523,108 -19,868 -3.66 3,243 -9.08 0.0004
2022-10-27 2022-06-30 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 542,976 68,046 14.33 3,567 6.67 0.0005
2022-08-15 2022-06-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 542,976 68,046 3,567 0.0001
2022-10-27 2022-03-31 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 474,930 35,649 8.12 3,344 -5.19 0.0005
2022-05-13 2022-03-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 474,930 35,649 3,344 0.0005
2022-02-14 2021-12-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 439,281 -15,386 -3.38 3,527 -2.30 0.0004
2021-11-15 2021-09-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 454,667 13,872 3.15 3,610 -3.19 0.0005
2021-08-23 2021-06-30 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 440,795 -40,452 -8.41 3,729 -0.80 0.0005
2021-08-16 2021-06-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 440,795 -40,452 3,729 0.0001
2021-05-17 2021-03-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 481,247 31,207 6.93 3,759 11.21 0.0006
2021-02-16 2020-12-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 450,040 -3,393 -0.75 3,380 0.06 0.0005
2020-11-13 2020-09-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 453,433 21,907 5.08 3,378 9.96 0.0007
2020-08-14 2020-06-30 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 431,526 16,815 4.05 3,072 4.77 0.0007
2020-05-26 2020-03-31 13F/A-1 WESTERN ASSET MUN HIGH INCOM COM 95766N103 414,711 138,029 49.89 2,932 39.82 0.0008
2020-05-15 2020-03-31 13F WESTERN ASSET MUN HIGH INCOM COM 95766N103 414,711 138,029 2,932 225.2387
2020-02-14 2019-12-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 276,682 73,213 35.98 2,097 35.99 0.0005
2019-11-14 2019-09-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 203,469 41,222 25.41 1,542 25.57 0.0004
2019-08-14 2019-06-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 162,247 -42,681 -20.83 1,228 -19.00 0.0003
2019-05-15 2019-03-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 204,928 -18,537 -8.30 1,516 -2.13 0.0004
2019-02-14 2018-12-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 223,465 -6,061 -2.64 1,549 -4.68 0.0005
2019-04-23 2018-09-30 13F/A-2 WESTERN ASSET MUN HI INCM FD COM 95766N103 229,526 -57,463 -20.02 1,625 -21.69 0.0004
2018-11-20 2018-09-30 13F/A-1 WESTERN ASSET MUN HI INCM FD COM 95766N103 229,526 0 1,625 0.0004
2018-11-14 2018-09-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 229,526 -57,463 1,625
2019-04-23 2018-06-30 13F/A-1 WESTERN ASSET MUN HI INCM FD COM 95766N103 286,989 39,254 15.85 2,075 16.44 0.0006
2018-08-14 2018-06-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 286,989 39,254 2,075
2019-04-23 2018-03-31 13F/A-1 WESTERN ASSET MUN HI INCM FD COM 95766N103 247,735 39,905 19.20 1,782 15.86 0.0005
2018-05-14 2018-03-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 247,735 39,905 1,782
2019-04-23 2017-12-31 13F/A-1 WESTERN ASSET MUN HI INCM FD COM 95766N103 207,830 12,974 6.66 1,538 1.85 0.0004
2018-02-14 2017-12-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 207,830 12,974 1,538
2017-11-14 2017-09-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 194,856 -65,019 -25.02 1,510 -21.19 0.0005
2017-08-11 2017-06-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 259,875 -35,601 -12.05 1,916 -10.34 0.0006
2017-05-22 2017-03-31 13F/A-1 WESTERN ASSET MUN HI INCM FD COM 95766N103 295,476 35,839 13.80 2,137 14.83 0.0007
2017-05-12 2017-03-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 295,476 2,137
2017-02-22 2016-12-31 13F/A-1 WESTERN ASSET MUN HI INCM FD COM 95766N103 259,637 145,543 127.56 1,861 105.18 0.0006
2017-02-13 2016-12-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 259,637 1,861
2016-11-10 2016-09-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 114,094 1,299 1.15 907 -2.47 0.0003
2016-08-12 2016-06-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 112,795 241 0.21 930 1.53 0.0003
2016-05-12 2016-03-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 112,554 -59,309 -34.51 916 -31.64 0.0004
2016-02-09 2015-12-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 171,863 -51,059 -22.90 1,340 -16.87 0.0005
2016-02-08 2015-09-30 13F/A-1 WESTERN ASSET MUN HI INCM FD COM 95766N103 222,922 36,867 19.82 1,612 21.02 0.0006
2015-11-09 2015-09-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 222,922 1,612
2015-08-12 2015-06-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 186,055 -23,825 -11.35 1,332 -18.63 0.0005
2015-05-14 2015-03-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 209,880 -8,527 -3.90 1,637 -2.68 0.0006
2015-02-13 2014-12-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 218,407 -7,705 -3.41 1,682 2.44 0.0006
2014-12-16 2014-09-30 13F/A-1 WESTERN ASSET MUN HI INCM FD COM 95766N103 226,112 -47,438 -17.34 1,642 -14.35 0.0006
2014-11-14 2014-09-30 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 226,112 1,642
2014-05-13 2014-03-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 273,550 -25,724 -8.60 1,917 -4.82 0.0008
2014-02-13 2013-12-31 13F WESTERN ASSET MUN HI INCM FD COM 95766N103 299,274 -51,918 -14.78 2,014 -15.66 0.0009
2013-11-13 2013-09-30 13F WESTERN ASSET MUN HIGH INCO COM 95766N103 351,192 69,106 24.50 2,388 18.04 0.0011
2013-08-08 2013-06-30 13F WESTERN ASSET MUN HIGH INCO COM 95766N103 282,086 282,086 2,023 0.0010
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.