Key facts
- RIVERNORTH CAPITAL MANAGEMENT, LLC filed SCHEDULE 13G/A for MFS HIGH YIELD MUNICIPAL TRUST Shares of Beneficial Interest (CMU).
- Disclosed ownership: 12%.
- Date of event: 31 Mar 2026.
RIVERNORTH CAPITAL MANAGEMENT, LLC - 31 Mar 2026 SCHEDULE 13G/A Report for MFS HIGH YIELD MUNICIPAL TRUST Shares of Beneficial Interest (CMU)
- Filing Manager
- RIVERNORTH CAPITAL MANAGEMENT, LLC
- Reporting Manager
- RIVERNORTH CAPITAL MANAGEMENT, LLC
- Symbol
- CMU
- Shares outstanding
- 25,482,328 shares
- Disclosed Ownership
- 2,955,950 shares
- Ownership
- 12%
- Form type
- SCHEDULE 13G/A
- Filing time
- 15 May 2026, 12:54:42 UTC
- Date of event
- 31 Mar 2026
- Previous filing
- 07 Oct 2025
- SEC
- View on sec.gov
Key filing fact
RIVERNORTH CAPITAL MANAGEMENT, LLC disclosed 12% ownership in MFS HIGH YIELD MUNICIPAL TRUST Shares of Beneficial Interest (CMU) on 31 Mar 2026.
Change
- Previous schedule filing date: 07 Oct 2025.
- Current filing was accepted on 15 May 2026, 12:54.
Research use
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Reporting managers (1)
Names, ownership, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 12% | 2,955,950 | 2,955,950 | 0 | /s/ Marcus Collins | Marcus Collins, General Counsel and Chief Compliance Officer |
CIK / CUSIP context first