SEC EDGAR filings, ownership reports, and insider transactions for MFS HIGH YIELD MUNICIPAL TRUST.
Recent SEC filings for MFS HIGH YIELD MUNICIPAL TRUST including 4, 3, SCHEDULE 13D/A and more.
| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open 4 document | View SEC filing for 4 | 22 Jan 2026 | 20 Jan 2026 | ||
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 09 Jan 2026 | 01 Jan 2026 | |
| SCHEDULE 13D/A | Open SCHEDULE 13D/A document | View SEC filing for SCHEDULE 13D/A | 16 Dec 2025 | 005-84331 | ||
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 11 Dec 2025 | 01 Jun 2025 | |
| SCHEDULE 13G | Open SCHEDULE 13G document | View SEC filing for SCHEDULE 13G | 14 Nov 2025 | 005-84331 | ||
| SCHEDULE 13D/A | Open SCHEDULE 13D/A document | View SEC filing for SCHEDULE 13D/A | 14 Nov 2025 | 005-84331 | ||
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 30 Oct 2025 | 811-04992 | ||
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Oct 2025 | 31 Aug 2025 | 811-04992 | |
| SCHEDULE 13G/A | Open SCHEDULE 13G/A document | View SEC filing for SCHEDULE 13G/A | 07 Oct 2025 | 005-84331 | ||
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 06 Oct 2025 | 02 Apr 2025 | |
| SCHEDULE 13G/A | Open SCHEDULE 13G/A document | View SEC filing for SCHEDULE 13G/A | 02 Oct 2025 | 005-84331 | ||
| SCHEDULE 13D/A | Open SCHEDULE 13D/A document | View SEC filing for SCHEDULE 13D/A | 28 Aug 2025 | 005-84331 | ||
| N-PX | Open N-PX document | View SEC filing for N-PX | 28 Aug 2025 | 30 Jun 2025 | 811-04992 | |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | 22 Aug 2025 | 02 Oct 2025 | 811-04992 | |
| CORRESP | Open CORRESP document | View SEC filing for CORRESP | 19 Aug 2025 | |||
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST (CMU) NCSRS | 28 Jul 2025 | 31 May 2025 | 811-04992 |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 25 Jul 2025 | 31 May 2025 | 811-04992 | |
| SCHEDULE 13D/A | Open SCHEDULE 13D/A document | View SEC filing for SCHEDULE 13D/A | 16 Jul 2025 | 005-84331 | ||
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 27 Jun 2025 | 30 Sep 2024 | |
| SCHEDULE 13G/A | Open SCHEDULE 13G/A document | View SEC filing for SCHEDULE 13G/A | 15 May 2025 | 005-84331 | ||
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Apr 2025 | 28 Feb 2025 | 811-04992 | |
| SCHEDULE 13G/A | Open SCHEDULE 13G/A document | View SEC filing for SCHEDULE 13G/A | 04 Apr 2025 | 005-84331 | ||
| 3 | Open 3 document | View SEC filing for 3 | 14 Feb 2025 | 11 Feb 2025 | ||
| SCHEDULE 13D/A | Open SCHEDULE 13D/A document | View SEC filing for SCHEDULE 13D/A | 14 Feb 2025 | 005-84331 | ||
| N-CEN | Open N-CEN document | View SEC filing for N-CEN | 11 Feb 2025 | 30 Nov 2024 | 811-04992 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST NCSR | 27 Jan 2025 | 30 Nov 2024 | 811-04992 |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Jan 2025 | 30 Nov 2024 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 23 Jan 2025 | 15 Jul 2024 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 08 Jan 2025 | 01 Jan 2025 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 08 Jan 2025 | 01 Jan 2025 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 08 Jan 2025 | 01 Jan 2025 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 08 Jan 2025 | 01 Jan 2025 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 08 Jan 2025 | 01 Jan 2025 | |
| SCHEDULE 13G | Open SCHEDULE 13G document | View SEC filing for SCHEDULE 13G | 03 Jan 2025 | 005-84331 | ||
| SC 13G | Open SC 13G document | View SEC filing for SC 13G | 14 Nov 2024 | 005-84331 | ||
| SC 13G | Open SC 13G document | View SEC filing for SC 13G | CITY OF LONDON INVESTMENT MGT CO LTD / MFS HIGH YIELD MUNI - SCH13G | 14 Nov 2024 | 005-84331 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 28 Oct 2024 | 811-04992 | ||
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 25 Oct 2024 | 31 Aug 2024 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 01 Oct 2024 | 31 Mar 2024 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | SC 13G/A | 01 Oct 2024 | 005-84331 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 19 Sep 2024 | 01 Apr 2024 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 18 Sep 2024 | 18 Mar 2024 | |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 13 Sep 2024 | 05 Sep 2024 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | SC 13G/A | 03 Sep 2024 | 005-84331 | |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 03 Sep 2024 | 30 Aug 2024 | |
| N-PX | Open N-PX document | View SEC filing for N-PX | 27 Aug 2024 | 30 Jun 2024 | 811-04992 | |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | 23 Aug 2024 | 03 Oct 2024 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 06 Aug 2024 | 02 Aug 2024 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 25 Jul 2024 | 31 May 2024 | 811-04992 | |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST NCSRS | 22 Jul 2024 | 31 May 2024 | 811-04992 |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 16 Jul 2024 | 15 Jul 2024 | |
| N-23C-2 | Open N-23C-2 document | View SEC filing for N-23C-2 | 17 Jun 2024 | 17 Jun 2024 | 817-01077 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Apr 2024 | 29 Feb 2024 | 811-04992 | |
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | 28 Feb 2024 | 005-84331 | ||
| N-CEN | Open N-CEN document | View SEC filing for N-CEN | 09 Feb 2024 | 30 Nov 2023 | 811-04992 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 31 Jan 2024 | 005-84331 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST NCSR | 25 Jan 2024 | 30 Nov 2023 | 811-04992 |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Jan 2024 | 30 Nov 2023 | 811-04992 | |
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | FORM SC 13D/A | 08 Jan 2024 | 005-84331 | |
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | 02 Jan 2024 | 005-84331 | ||
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | FORM SC 13D/A | 29 Dec 2023 | 005-84331 | |
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | FORM SC 13D/A | 26 Dec 2023 | 005-84331 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | SC 13G/A | 01 Dec 2023 | 005-84331 | |
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | 17 Nov 2023 | 005-84331 | ||
| SC TO-I/A | Open SC TO-I/A document | View SEC filing for SC TO-I/A | 14 Nov 2023 | 005-84331 | ||
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 13 Nov 2023 | 06 Apr 2023 | |
| 4/A | Open 4/A document | View SEC filing for 4/A | PRIMARY DOCUMENT | 13 Nov 2023 | 08 Nov 2023 | |
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | FORM SC 13D/A | 13 Nov 2023 | 005-84331 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 09 Nov 2023 | 08 Nov 2023 | |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 07 Nov 2023 | 03 Nov 2023 | |
| SC TO-I/A | Open SC TO-I/A document | View SEC filing for SC TO-I/A | 07 Nov 2023 | 005-84331 | ||
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Oct 2023 | 31 Aug 2023 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 10 Oct 2023 | 06 Oct 2023 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 06 Oct 2023 | 04 Oct 2023 | |
| SC TO-I | Open SC TO-I document | View SEC filing for SC TO-I | 06 Oct 2023 | 005-84331 | ||
| N-23C-2 | Open N-23C-2 document | View SEC filing for N-23C-2 | 05 Oct 2023 | 05 Oct 2023 | 817-01077 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 03 Oct 2023 | 03 Oct 2023 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 06 Sep 2023 | 01 Sep 2023 | |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 30 Aug 2023 | 05 Oct 2023 | 811-04992 |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 29 Aug 2023 | 30 Jun 2023 | 811-04992 |
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | 25 Aug 2023 | 005-84331 | ||
| SC TO-C | Open SC TO-C document | View SEC filing for SC TO-C | 25 Aug 2023 | 005-84331 | ||
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 25 Jul 2023 | 24 Jul 2023 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 25 Jul 2023 | 31 May 2023 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 19 Jul 2023 | 18 Jul 2023 | |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST NCSRS | 18 Jul 2023 | 31 May 2023 | 811-04992 |
| SC 13D | Open SC 13D document | View SEC filing for SC 13D | 17 Jul 2023 | 005-84331 | ||
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 28 Jun 2023 | 27 Jun 2023 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 22 Jun 2023 | 21 Jun 2023 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 08 Jun 2023 | 06 Jun 2023 | |
| SC 13D/A | Open SC 13D/A document | View SEC filing for SC 13D/A | FORM SC 13D/A | 08 Jun 2023 | 005-84331 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 23 May 2023 | 19 May 2023 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 19 May 2023 | 18 May 2023 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 17 May 2023 | 15 May 2023 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 15 May 2023 | 11 May 2023 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 08 May 2023 | 05 May 2023 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Apr 2023 | 28 Feb 2023 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 14 Apr 2023 | 28 Mar 2023 | |
| SC 13D | Open SC 13D document | View SEC filing for SC 13D | FORM SC 13D | 10 Apr 2023 | 005-84331 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 10 Apr 2023 | 05 Apr 2023 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 04 Apr 2023 | 811-04992 | ||
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | FORM SC 13G/A | 14 Feb 2023 | 005-84331 | |
| N-CEN | Open N-CEN document | View SEC filing for N-CEN | 10 Feb 2023 | 30 Nov 2022 | 811-04992 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Jan 2023 | 30 Nov 2022 | 811-04992 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST NCSR | 19 Jan 2023 | 30 Nov 2022 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 18 Jan 2023 | 005-84331 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 09 Dec 2022 | 005-84331 | |
| SC 13G | Open SC 13G document | View SEC filing for SC 13G | FORM SC 13G | 08 Dec 2022 | 005-84331 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | SC 13G/A | 06 Dec 2022 | 005-84331 | |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 30 Nov 2022 | 28 Nov 2022 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 31 Oct 2022 | 811-04992 | ||
| N-23C-2 | Open N-23C-2 document | View SEC filing for N-23C-2 | 28 Oct 2022 | 28 Oct 2022 | 817-01077 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 25 Oct 2022 | 19 Apr 2022 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 25 Oct 2022 | 31 Aug 2022 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 06 Sep 2022 | 31 Dec 2021 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 31 Aug 2022 | 28 Feb 2022 | |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 29 Aug 2022 | 30 Jun 2022 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 26 Aug 2022 | 06 Oct 2022 | 811-04992 |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 25 Jul 2022 | 31 May 2022 | 811-04992 | |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 22 Jul 2022 | 31 May 2022 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 06 May 2022 | 005-84331 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 25 Apr 2022 | 28 Feb 2022 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 19 Apr 2022 | 15 Oct 2021 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 10 Mar 2022 | 01 Mar 2022 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 10 Mar 2022 | 01 Mar 2022 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 15 Feb 2022 | 15 Aug 2021 | |
| N-CEN | Open N-CEN document | View SEC filing for N-CEN | 09 Feb 2022 | 30 Nov 2021 | 811-04992 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Jan 2022 | 30 Nov 2021 | 811-04992 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 20 Jan 2022 | 30 Nov 2021 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 12 Jan 2022 | 005-84331 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 04 Jan 2022 | 18 Jun 2021 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 23 Dec 2021 | 31 Jan 2020 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 25 Oct 2021 | 31 Aug 2021 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 22 Oct 2021 | 15 Apr 2021 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 13 Sep 2021 | 811-04992 | ||
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 27 Aug 2021 | 30 Jun 2021 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 27 Aug 2021 | 07 Oct 2021 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | SC 13G/A | 10 Aug 2021 | 005-84331 | |
| SC 13G | Open SC 13G document | View SEC filing for SC 13G | SC 13G | 03 Aug 2021 | 005-84331 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 27 Jul 2021 | 20 Jul 2021 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 26 Jul 2021 | 31 May 2021 | 811-04992 | |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 22 Jul 2021 | 31 May 2021 | 811-04992 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 22 Jul 2021 | 20 Jul 2021 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 25 Jun 2021 | 18 Jun 2021 | |
| N-23C-2 | Open N-23C-2 document | View SEC filing for N-23C-2 | 21 Jun 2021 | 18 Jun 2021 | 817-01077 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 23 Apr 2021 | 28 Feb 2021 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 01 Apr 2021 | 31 Mar 2021 | |
| N-CEN | Open N-CEN document | View SEC filing for N-CEN | 11 Feb 2021 | 30 Nov 2020 | 811-04992 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 03 Feb 2021 | 005-84331 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 25 Jan 2021 | 30 Nov 2020 | 811-04992 |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 22 Jan 2021 | 30 Nov 2020 | 811-04992 | |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 26 Oct 2020 | 31 Aug 2020 | 811-04992 | |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 28 Aug 2020 | 30 Jun 2020 | 811-04992 |
| 4/A | Open 4/A document | View SEC filing for 4/A | PRIMARY DOCUMENT | 26 Aug 2020 | 31 Dec 2019 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 26 Aug 2020 | 30 Jun 2020 | |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 20 Aug 2020 | 01 Oct 2020 | 811-04992 |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 24 Jul 2020 | 31 May 2020 | 811-04992 | |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 22 Jul 2020 | 31 May 2020 | 811-04992 |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 23 Apr 2020 | 29 Feb 2020 | 811-04992 | |
| N-CEN | Open N-CEN document | View SEC filing for N-CEN | 11 Feb 2020 | 30 Nov 2019 | 811-04992 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 10 Feb 2020 | 005-84331 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 06 Feb 2020 | 31 Jan 2020 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 06 Feb 2020 | 31 Jan 2020 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 04 Feb 2020 | 811-04992 | ||
| CORRESP | Open CORRESP document | View SEC filing for CORRESP | 29 Jan 2020 | |||
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 29 Jan 2020 | 30 Nov 2019 | 811-04992 |
| NPORT-P | Open NPORT-P document | View SEC filing for NPORT-P | 23 Jan 2020 | 30 Nov 2019 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 15 Jan 2020 | 30 Jun 2019 | |
| NPORT-EX | Open NPORT-EX document | View SEC filing for NPORT-EX | 25 Oct 2019 | 31 Aug 2019 | 811-04992 | |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 28 Aug 2019 | 30 Jun 2019 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 22 Aug 2019 | 03 Oct 2019 | 811-04992 |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 24 Jul 2019 | 31 May 2019 | 811-04992 |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 22 Apr 2019 | 28 Feb 2019 | 811-04992 |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 28 Feb 2019 | 811-04992 | ||
| N-CEN | Open N-CEN document | View SEC filing for N-CEN | 12 Feb 2019 | 30 Nov 2018 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 05 Feb 2019 | 01 Jan 2018 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 01 Feb 2019 | 005-84331 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 23 Jan 2019 | 30 Nov 2018 | 811-04992 |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 10 Jan 2019 | 01 Jan 2019 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 10 Jan 2019 | 01 Jan 2019 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 08 Jan 2019 | 01 Jan 2019 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 24 Oct 2018 | 31 Aug 2018 | 811-04992 |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 28 Aug 2018 | 30 Jun 2018 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 23 Aug 2018 | 04 Oct 2018 | 811-04992 |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 18 Jul 2018 | 31 May 2018 | 811-04992 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 28 Jun 2018 | 31 Dec 2017 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 18 Apr 2018 | 28 Feb 2018 | 811-04992 |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 2018 FIDELITY BOND 17G-1 FILING | 21 Mar 2018 | 811-04992 | |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 26 Jan 2018 | 30 Nov 2017 | 811-04992 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 26 Jan 2018 | 30 Nov 2017 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 17 Jan 2018 | 005-84331 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 11 Dec 2017 | 14 Jun 2017 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 30 Nov 2017 | 31 May 2017 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 26 Oct 2017 | 31 Aug 2017 | 811-04992 |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 28 Aug 2017 | 30 Jun 2017 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 24 Aug 2017 | 05 Oct 2017 | 811-04992 |
| NSAR-A | Open NSAR-A document | View SEC filing for NSAR-A | 27 Jul 2017 | 31 May 2017 | 811-04992 | |
| N-CSRS | Open N-CSRS document | Open XBRL data | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 27 Jul 2017 | 31 May 2017 | 811-04992 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 21 Jun 2017 | 31 Dec 2016 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 21 Jun 2017 | 31 Dec 2016 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 21 Jun 2017 | 31 Dec 2016 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 16 Jun 2017 | 14 Jun 2017 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 15 Jun 2017 | 16 Dec 2016 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 20 Apr 2017 | 28 Feb 2017 | 811-04992 |
| CORRESP | Open CORRESP document | View SEC filing for CORRESP | 06 Apr 2017 | |||
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 29 Mar 2017 | 23 Mar 2017 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 24 Mar 2017 | 23 Mar 2017 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 10 Mar 2017 | 06 Mar 2017 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | INSURANCE BONDS | 17 Feb 2017 | 811-04992 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 30 Jan 2017 | 30 Nov 2016 | 811-04992 |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 26 Jan 2017 | 30 Nov 2016 | 811-04992 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 13 Jan 2017 | 005-84331 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 27 Dec 2016 | 17 Dec 2016 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 20 Oct 2016 | 31 Aug 2016 | 811-04992 |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 29 Aug 2016 | 30 Jun 2016 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 19 Aug 2016 | 06 Oct 2016 | 811-04992 |
| NSAR-A | Open NSAR-A document | View SEC filing for NSAR-A | 28 Jul 2016 | 31 May 2016 | 811-04992 | |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 26 Jul 2016 | 31 May 2016 | 811-04992 |
| N-Q | Open N-Q document | Open XBRL data | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 27 Apr 2016 | 29 Feb 2016 | 811-04992 |
| CORRESP | Open CORRESP document | View SEC filing for CORRESP | 26 Apr 2016 | |||
| 4 | Open 4 document | Open XBRL data | View SEC filing for 4 | PRIMARY DOCUMENT | 14 Apr 2016 | 15 Oct 2015 | |
| SC 13G/A | Open SC 13G/A document | Open XBRL data | View SEC filing for SC 13G/A | SC 13GA NO 1 3-31-2016 (MFS HIGH YIELD MUNICIPAL TRUST) | 11 Apr 2016 | 005-84331 | |
| SC 13G | Open SC 13G document | Open XBRL data | View SEC filing for SC 13G | SC 13G 3-31-2016 (MFS HIGH YIELD MUNICIPAL TRUST) | 11 Apr 2016 | 005-84331 | |
| 3 | Open 3 document | View SEC filing for 3 | FORM 3 SUBMISSION | 06 Apr 2016 | 24 Mar 2016 | |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 06 Apr 2016 | 24 Mar 2016 | |
| N-23C-2 | Open N-23C-2 document | View SEC filing for N-23C-2 | MFS HIGH YIELD MUNICIPAL TRUST N-23C-2 | 18 Mar 2016 | 18 Mar 2016 | 817-01077 |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | FIDELITY BONDS | 14 Mar 2016 | 811-04992 | |
| N-23C-2 | Open N-23C-2 document | View SEC filing for N-23C-2 | MFS HIGH YIELD MUNICIPAL TRUST N-23C-2 | 17 Feb 2016 | 17 Feb 2016 | 817-01077 |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 01 Feb 2016 | 30 Nov 2015 | 811-04992 |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 28 Jan 2016 | 30 Nov 2015 | 811-04992 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 19 Jan 2016 | 005-84331 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 01 Dec 2015 | 31 May 2015 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 29 Oct 2015 | 31 Aug 2015 | 811-04992 |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 15 Sep 2015 | 10 Sep 2015 | |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 26 Aug 2015 | 30 Jun 2015 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 21 Aug 2015 | 01 Oct 2015 | 811-04992 |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 29 Jul 2015 | 31 May 2015 | 811-04992 |
| NSAR-A | Open NSAR-A document | View SEC filing for NSAR-A | 29 Jul 2015 | 31 May 2015 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 21 Jul 2015 | 15 Jul 2015 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 27 Apr 2015 | 28 Feb 2015 | 811-04992 |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 03 Feb 2015 | 30 Nov 2014 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 03 Feb 2015 | 005-84331 | |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 28 Jan 2015 | 30 Nov 2014 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 08 Jan 2015 | 01 Jan 2015 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 24 Dec 2014 | 26 Jun 2014 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | FIDELITY BONDS | 01 Dec 2014 | 811-04992 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 28 Oct 2014 | 31 Aug 2014 | 811-04992 |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 27 Aug 2014 | 30 Jun 2014 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 22 Aug 2014 | 02 Oct 2014 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 08 Aug 2014 | 005-84331 | |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 06 Aug 2014 | 31 May 2014 | 811-04992 |
| NSAR-A | Open NSAR-A document | View SEC filing for NSAR-A | 29 Jul 2014 | 31 May 2014 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 27 Jun 2014 | 26 Jun 2014 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 13 Jun 2014 | 31 Dec 2013 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 07 May 2014 | 06 May 2014 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 28 Apr 2014 | 28 Feb 2014 | 811-04992 |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 20 Feb 2014 | 11 Feb 2014 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 28 Jan 2014 | 30 Nov 2013 | 811-04992 |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 28 Jan 2014 | 30 Nov 2013 | 811-04992 | |
| CORRESP | Open CORRESP document | View SEC filing for CORRESP | 21 Jan 2014 | |||
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 15 Jan 2014 | 005-84331 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 10 Jan 2014 | 01 Jan 2014 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | FIDELITY BONDS | 23 Dec 2013 | 811-04992 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 30 Oct 2013 | 31 Aug 2013 | 811-04992 |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 28 Aug 2013 | 30 Jun 2013 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 22 Aug 2013 | 03 Oct 2013 | 811-04992 |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 30 Jul 2013 | 31 May 2013 | 811-04992 |
| NSAR-A | Open NSAR-A document | View SEC filing for NSAR-A | 29 Jul 2013 | 31 May 2013 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 10 Jul 2013 | 01 Jul 2013 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 30 Apr 2013 | 31 Oct 2012 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 25 Apr 2013 | 28 Feb 2013 | 811-04992 |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 01 Feb 2013 | 30 Nov 2012 | 811-04992 |
| NSAR-B/A | Open NSAR-B/A document | View SEC filing for NSAR-B/A | 29 Jan 2013 | 30 Nov 2012 | 811-04992 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | FIDELITY BONDS | 29 Jan 2013 | 811-04992 | |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 28 Jan 2013 | 30 Nov 2012 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 18 Jan 2013 | 18 Jul 2012 | |
| SC 13G | Open SC 13G document | View SEC filing for SC 13G | SCHEDULE 13G | 07 Jan 2013 | 005-84331 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 24 Oct 2012 | 31 Aug 2012 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | CITIGROUP SC 13G A #4 9-30-2012 (MFS HIGH YIELD MUNICIPAL TRUST) | 10 Oct 2012 | 005-84331 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | ST EXIT MS&CO | 09 Oct 2012 | 005-84331 | |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 20 Sep 2012 | 31 Oct 2012 | 811-04992 |
| SC 13G | Open SC 13G document | View SEC filing for SC 13G | CITIGROUP INC SC 13G 9-12-2012 (MFS HIGH YIELD MUNICIPAL TRUST) | 19 Sep 2012 | 005-84331 | |
| 4 | Open 4 document | View SEC filing for 4 | CMU FORM 4 | 14 Sep 2012 | 12 Sep 2012 | |
| SC TO-I/A | Open SC TO-I/A document | View SEC filing for SC TO-I/A | MFS HIGH YIELD MUNICIPAL TRUST SC TO-I/A AMENDMENT NO. 4 | 12 Sep 2012 | 005-84331 | |
| DEFA14A | Open DEFA14A document | View SEC filing for DEFA14A | MFS PREFERRED SHARES DEFA14A | 07 Sep 2012 | 811-04992 | |
| SC TO-I/A | Open SC TO-I/A document | View SEC filing for SC TO-I/A | MFS HIGH YIELD MUNICIPAL TRUST SC TO-I/A AMENDMENT NO. 3 | 07 Sep 2012 | 005-84331 | |
| SC TO-I/A | Open SC TO-I/A document | View SEC filing for SC TO-I/A | MFS HIGH YIELD MUNICIPAL TRUST SC TO-I/A AMENDMENT NO. 2 | 31 Aug 2012 | 005-84331 | |
| DEFA14A | Open DEFA14A document | View SEC filing for DEFA14A | MFS CLOSED END FUND DEFA14A | 31 Aug 2012 | 811-04992 | |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST N-PX | 28 Aug 2012 | 30 Jun 2012 | 811-04992 |
| SC TO-I/A | Open SC TO-I/A document | View SEC filing for SC TO-I/A | MFS HIGH YIELD MUNICIPAL TRUST SC TO-I/A | 24 Aug 2012 | 005-84331 | |
| DEFA14A | Open DEFA14A document | View SEC filing for DEFA14A | MFS CLOSED END FUNDS DEFA14A | 23 Aug 2012 | 811-04992 | |
| DEFA14A | Open DEFA14A document | View SEC filing for DEFA14A | MFS CLOSED END FUND DEFA14A | 10 Aug 2012 | 811-04992 | |
| SC TO-I | Open SC TO-I document | View SEC filing for SC TO-I | MFS HIGH YIELD MUNICIPAL TRUST SC TO-I | 09 Aug 2012 | 005-84331 | |
| DEFA14A | Open DEFA14A document | View SEC filing for DEFA14A | MFS CLOSED END FUNDS DEFA14A | 09 Aug 2012 | 811-04992 | |
| CORRESP | Open CORRESP document | View SEC filing for CORRESP | 09 Aug 2012 | |||
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS CLOSED END FUNDS DEF 14A | 09 Aug 2012 | 31 Aug 2012 | 811-04992 |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 02 Aug 2012 | 31 May 2012 | 811-04992 |
| NSAR-A | Open NSAR-A document | View SEC filing for NSAR-A | 27 Jul 2012 | 31 May 2012 | 811-04992 | |
| SC TO-C | Open SC TO-C document | View SEC filing for SC TO-C | MFS HIGH YIELD MUNICIPAL TRUST SC TO-C | 09 Jul 2012 | 005-84331 | |
| PRE 14A | Open PRE 14A document | View SEC filing for PRE 14A | MFS CLOSED END FUNDS PRE 14A | 09 Jul 2012 | 22 Aug 2012 | 811-04992 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 02 Jul 2012 | 31 Dec 2011 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 02 Jul 2012 | 31 Dec 2011 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 19 Apr 2012 | 29 Feb 2012 | 811-04992 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 03 Apr 2012 | 03 Oct 2011 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 29 Mar 2012 | 22 Mar 2012 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | 40-17G | 15 Mar 2012 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 01 Mar 2012 | 01 Sep 2011 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 31 Jan 2012 | 30 Nov 2011 | 811-04992 |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 26 Jan 2012 | 30 Nov 2011 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 04 Jan 2012 | 31 Dec 2011 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 03 Jan 2012 | 31 Dec 2011 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 21 Oct 2011 | 31 Aug 2011 | 811-04992 |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 02 Sep 2011 | 01 Sep 2011 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 01 Sep 2011 | 01 Sep 2011 | |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST | 25 Aug 2011 | 30 Jun 2011 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 24 Aug 2011 | 05 Oct 2011 | 811-04992 |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 29 Jul 2011 | 31 May 2011 | 811-04992 |
| NSAR-A | Open NSAR-A document | View SEC filing for NSAR-A | 28 Jul 2011 | 31 May 2011 | 811-04992 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 30 Jun 2011 | 31 Dec 2010 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 02 Jun 2011 | 02 Dec 2010 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 02 Jun 2011 | 02 Dec 2010 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 25 Apr 2011 | 28 Feb 2011 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | MFS HIGH YIELD MUNICIPAL TRUST SC13GA 12-31-2010 | 04 Feb 2011 | 005-84331 | |
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 31 Jan 2011 | 30 Nov 2010 | 811-04992 |
| NSAR-B/A | Open NSAR-B/A document | View SEC filing for NSAR-B/A | 28 Jan 2011 | 30 Nov 2010 | 811-04992 | |
| NSAR-B/A | Open NSAR-B/A document | View SEC filing for NSAR-B/A | 28 Jan 2011 | 30 Nov 2010 | 811-04992 | |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 26 Jan 2011 | 30 Nov 2010 | 811-04992 | |
| 40-17G | Open 40-17G document | View SEC filing for 40-17G | FIDELITY BONDS | 23 Dec 2010 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 07 Dec 2010 | 02 Dec 2010 | |
| NSAR-B/A | Open NSAR-B/A document | View SEC filing for NSAR-B/A | 18 Nov 2010 | 30 Nov 2009 | 811-04992 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 28 Oct 2010 | 31 Aug 2010 | 811-04992 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 09 Sep 2010 | 08 Mar 2010 | |
| N-PX | Open N-PX document | View SEC filing for N-PX | MFS HIGH YIELD MUNICIPAL TRUST | 26 Aug 2010 | 30 Jun 2010 | 811-04992 |
| DEF 14A | Open DEF 14A document | View SEC filing for DEF 14A | MFS MULTI CLOSED END FUND DEF 14A | 25 Aug 2010 | 07 Oct 2010 | 811-04992 |
| N-CSRS | Open N-CSRS document | View SEC filing for N-CSRS | MFS HIGH YIELD MUNICIPAL TRUST N-CSRS | 29 Jul 2010 | 31 May 2010 | 811-04992 |
| NSAR-A | Open NSAR-A document | View SEC filing for NSAR-A | 28 Jul 2010 | 31 May 2010 | 811-04992 | |
| 3 | Open 3 document | View SEC filing for 3 | PRIMARY DOCUMENT | 02 Jul 2010 | 01 Jul 2010 | |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 29 Jun 2010 | 31 Dec 2009 | |
| N-Q | Open N-Q document | View SEC filing for N-Q | MFS HIGH YIELD MUNICIPAL TRUST N-Q | 26 Apr 2010 | 28 Feb 2010 | 811-04992 |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | AMENDED SCHEDULE 13G | 12 Feb 2010 | 005-84331 | |
| SC 13G | Open SC 13G document | View SEC filing for SC 13G | ST-INITIAL-MS&CO | 12 Feb 2010 | 005-84331 | |
| SC 13G/A | Open SC 13G/A document | View SEC filing for SC 13G/A | 03 Feb 2010 | 005-84331 | ||
| N-CSR | Open N-CSR document | View SEC filing for N-CSR | MFS HIGH YIELD MUNICIPAL TRUST N-CSR | 01 Feb 2010 | 30 Nov 2009 | 811-04992 |
| NSAR-B | Open NSAR-B document | View SEC filing for NSAR-B | 27 Jan 2010 | 30 Nov 2009 | 811-04992 | |
| NSAR-A/A | Open NSAR-A/A document | View SEC filing for NSAR-A/A | 07 Jan 2010 | 31 May 2009 | 811-04992 |
MFS HIGH YIELD MUNICIPAL TRUST files with the SEC under CIK 0000809844. This page aggregates EDGAR filings and related ownership activity.