MFS HIGH YIELD MUNICIPAL TRUST reports

Company 1 identity field
Location
Boston, MA
SEC filing record 1 source field
Fiscal year end
30 November
MFS HIGH YIELD MUNICIPAL TRUST has filed 548 SEC EDGAR filings since 31 Jan 1994

SEC filing history

Showing 1-25 of 366 matching filings.

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25
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1
SCHEDULE 13G/A File 005-84331

SCHEDULE 13G/A filing

Filing date
18 May 2026
Reporting date
Not listed
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SCHEDULE 13G/A File 005-84331

SCHEDULE 13G/A filing

Filing date
15 May 2026
Reporting date
Not listed
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SCHEDULE 13D/A File 005-84331

SCHEDULE 13D/A filing

Filing date
12 May 2026
Reporting date
Not listed
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SC TO-I/A File 005-84331

SC TO-I/A filing

Filing date
11 May 2026
Reporting date
Not listed
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SC TO-I/A File 005-84331

SC TO-I/A filing

Filing date
06 May 2026
Reporting date
Not listed
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SCHEDULE 13D/A File 005-84331

SCHEDULE 13D/A filing

Filing date
05 May 2026
Reporting date
Not listed
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SCHEDULE 13G/A File 005-84331

SCHEDULE 13G/A filing

Filing date
05 May 2026
Reporting date
Not listed
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4

4

Filing date
05 May 2026
Reporting date
01 May 2026
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SCHEDULE 13D/A File 005-84331

SCHEDULE 13D/A filing

Filing date
01 May 2026
Reporting date
Not listed
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SCHEDULE 13D/A File 005-84331

SCHEDULE 13D/A filing

Filing date
27 Apr 2026
Reporting date
Not listed
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NPORT-P File 811-04992

NPORT-P filing

Filing date
24 Apr 2026
Reporting date
28 Feb 2026
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SCHEDULE 13D/A File 005-84331

SCHEDULE 13D/A filing

Filing date
09 Apr 2026
Reporting date
Not listed
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SC TO-I File 005-84331

SC TO-I filing

Filing date
06 Apr 2026
Reporting date
Not listed
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N-23C-2 File 817-01077

N-23C-2 filing

Filing date
01 Apr 2026
Reporting date
01 Apr 2026
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4

PRIMARY DOCUMENT

Filing date
01 Apr 2026
Reporting date
30 Sep 2025
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SC TO-C File 005-84331

SC TO-C filing

Filing date
04 Mar 2026
Reporting date
Not listed
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SCHEDULE 13G File 005-84331

SCHEDULE 13G filing

Filing date
17 Feb 2026
Reporting date
Not listed
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N-CEN File 811-04992

N-CEN filing

Filing date
12 Feb 2026
Reporting date
30 Nov 2025
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NPORT-P File 811-04992

NPORT-P filing

Filing date
26 Jan 2026
Reporting date
30 Nov 2025
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4/A

4/A filing

Filing date
23 Jan 2026
Reporting date
20 Jan 2026
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N-CSR File 811-04992

MFS HIGH YIELD MUNICIPAL TRUST (CMU) NCSR

Filing date
23 Jan 2026
Reporting date
30 Nov 2025
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4

4 filing

Filing date
22 Jan 2026
Reporting date
20 Jan 2026
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3

PRIMARY DOCUMENT

Filing date
09 Jan 2026
Reporting date
01 Jan 2026
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SCHEDULE 13D/A File 005-84331

SCHEDULE 13D/A filing

Filing date
16 Dec 2025
Reporting date
Not listed
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4

PRIMARY DOCUMENT

Filing date
11 Dec 2025
Reporting date
01 Jun 2025
SEC evidence
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