# RiverNorth Managed Duration Municipal Income Fund Inc.

RiverNorth Managed Duration Municipal Income Fund Inc. (CIK 1771226) is an SEC-registered fund company and $292.6M in net assets as of 2026-03-31.

## Registrant

- CIK: 1771226
- File number: 811-23434
- LEI: 549300Y5L3V48O754353
- Address: 360 S. Rosemary Avenue Suite 1420, West Palm Beach, US-FL, 33401
- Phone: 312-445-2249
- Net assets: $292.6M
- Total assets: $301.7M
- Latest report: 2026-03-31

## Fund series (1)

| Series | Net assets |
| --- | --- |
| RiverNorth Managed Duration Muni Income Fund Inc. | $292.6M |

## Largest reported holdings (across all series)

| Holding | Value |
| --- | --- |
| [Blackrock Liquidity Funds Municash](https://search.stillhousedata.com/security/09248U841) | $31.7M |
| [Blackrock Muniholdings Fund Inc](https://search.stillhousedata.com/security/09253N104) | $23.8M |
| [Blackrock Muniyield Quality Fund Inc](https://search.stillhousedata.com/security/09254F100) | $18.8M |
| [Illinois St](https://search.stillhousedata.com/security/452152P21) | $18.5M |
| [North Carolina St Turnpike Auth](https://search.stillhousedata.com/security/65830RDA4) | $14.0M |
| [New Hope Cultural Edu Facs Fin Corp Tx Hosp Revenue](https://search.stillhousedata.com/security/645424BP6) | $14.0M |
| [Blackrock Muniyield Quality Fund Iii Inc](https://search.stillhousedata.com/security/09254E103) | $13.7M |
| [Washington Dc Met Area Transit Auth Dedicated Revenue](https://search.stillhousedata.com/security/93878YDS5) | $13.3M |
| [Polk Cnty Ia](https://search.stillhousedata.com/security/7311974F3) | $13.0M |
| [Massachusetts St Transprtn Fund Revenue](https://search.stillhousedata.com/security/57604TKE5) | $12.4M |
| [San Diego Cnty Ca Regl Arpt Auth Airport Revenue](https://search.stillhousedata.com/security/79739GNA0) | $12.2M |
| [Triborough Ny Bridge & Tunnel Auth Revenues](https://search.stillhousedata.com/security/89602RDV4) | $11.5M |
| [Michigan St Trunk Line](https://search.stillhousedata.com/security/5946954N5) | $10.9M |
| [Blackrock Muniholdings California Quality Fund Inc](https://search.stillhousedata.com/security/09254L107) | $10.5M |
| [Mansfield Tx Indep Sch Dist](https://search.stillhousedata.com/security/564386VN7) | $10.5M |

## More

- [CIK 1771226 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1771226&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/registrant/1771226.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.