# RiverNorth Managed Duration Municipal Income Fund Inc. (RMM) Source: https://www.quantisnow.com/company/RMM Generated: 2026-11-11T03:37:10.052Z - Ticker: RMM - Exchange: NYSE - Sector: Finance - Industry: Trusts Except Educational Religious and Charitable - IPO year: 2019 - SEC CIK: 0001771226 - Website: rivernorth.com/closed-end-funds/rmm ## About Rivernorth Managed Duration Municipal Income Fund Inc. is a closed ended fixed income mutual fund launched and managed by RiverNorth Capital Management, LLC. The fund is co-managed by MacKay Shields LLC. It invests in the fixed income markets of the United States. The fund primarily invests in investment grade municipal debt securities. It seeks to invest in securities of any maturity. The fund employs a combination of fundamental and quantitative analysis. It benchmarks the performance of its portfolio against the Bloomberg Barclays Municipal Bond Index. The fund employs proprietary research to create its portfolio. Rivernorth Managed Duration Municipal Income Fund Inc. was formed on July 26, 2019 and is domiciled in the United States. ## Latest RMM news and filings - 2026-10-01 20:30 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-6732657) - 2026-09-10 15:59 UTC [SEC Form N-CEN filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-cen-filed-by-rivernorth-managed-duration-municipal-income-6711312) - 2026-09-04 17:35 UTC [SEC Form N-CSR filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-csr-filed-by-rivernorth-managed-duration-municipal-income-6706554) - 2026-08-20 21:04 UTC [SEC Form N-PX filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-px-filed-by-rivernorth-managed-duration-municipal-income-6690386) - 2026-07-01 20:30 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-6623139) - 2026-04-01 20:30 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-6482225) - 2026-03-06 15:22 UTC [SEC Form N-CSRS filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-csrs-filed-by-rivernorth-managed-duration-municipal-income-6434329) - 2026-01-02 21:30 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-6332344) - 2025-10-01 21:00 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-6218433) - 2025-09-18 20:21 UTC [SEC Form 3] [New insider Rivernorth Financial Holdings, Llc claimed no ownership of stock in the company (SEC Form 3)](https://www.quantisnow.com/insight/new-insider-rivernorth-financial-holdings-llc-claimed-no-ownership-of-6205713) - 2025-09-10 17:56 UTC [SEC Form N-CEN filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-cen-filed-by-rivernorth-managed-duration-municipal-income-6196339) - 2025-09-05 18:50 UTC [SEC Form N-CSR filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-csr-filed-by-rivernorth-managed-duration-municipal-income-6191500) - 2025-08-20 01:30 UTC [SEC Form N-PX filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-px-filed-by-rivernorth-managed-duration-municipal-income-6172685) - 2025-07-10 22:08 UTC [SEC Form 3] [Amendment: New insider Rivernorth Strategic Holdings, Llc claimed ownership of 5,000 units of Common Shares of Beneficial Interest (SEC Form 3)](https://www.quantisnow.com/insight/amendment-new-insider-rivernorth-strategic-holdings-llc-claimed-ownership-of-6117272) - 2025-07-01 21:00 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-6106408) - 2025-05-21 11:56 UTC [SEC Form POS EX] [SEC Form POS EX filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-pos-ex-filed-by-rivernorth-managed-duration-municipal-6051630) - 2025-05-21 11:08 UTC [SEC Form 424B5] [SEC Form 424B5 filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-424b5-filed-by-rivernorth-managed-duration-municipal-income-6051581) - 2025-04-16 04:15 UTC [SEC Form EFFECT] [SEC Form EFFECT filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-effect-filed-by-rivernorth-managed-duration-municipal-income-5989258) - 2025-04-15 23:31 UTC [SEC Form 424B3] [SEC Form 424B3 filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-424b3-filed-by-rivernorth-managed-duration-municipal-income-5989226) - 2025-04-11 22:34 UTC [Insider Buy] [Portfolio Manager Browne Jonathan Paul bought $10,432 worth of shares (800 units at $13.04) (SEC Form 4)](https://www.quantisnow.com/insight/portfolio-manager-browne-jonathan-paul-bought-10432-worth-of-shares-5985926) - 2025-04-10 21:52 UTC [Insider Buy] [Amendment: President Galley Patrick W. bought $78,900 worth of shares (6,000 units at $13.15) (SEC Form 4)](https://www.quantisnow.com/insight/amendment-president-galley-patrick-w-bought-78900-worth-of-shares-5984750) - 2025-04-10 21:39 UTC [Insider Buy] [President Galley Patrick W. bought $52,563 worth of shares (4,000 units at $13.14) (SEC Form 4)](https://www.quantisnow.com/insight/president-galley-patrick-w-bought-52563-worth-of-shares-4000-5984741) - 2025-04-09 21:19 UTC [Insider Buy] [SEC Form 4 filed by President Galley Patrick W.](https://www.quantisnow.com/insight/sec-form-4-filed-by-president-galley-patrick-w-5983170) - 2025-04-01 22:00 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-5970475) - 2025-03-31 10:21 UTC [Amendment: SEC Form N-2/A filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/amendment-sec-form-n-2a-filed-by-rivernorth-managed-duration-municipal-5965793) - 2025-03-07 15:04 UTC [SEC Form N-CSRS filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-csrs-filed-by-rivernorth-managed-duration-municipal-income-5932768) - 2025-02-20 22:03 UTC [Amendment: SEC Form N-2/A filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/amendment-sec-form-n-2a-filed-by-rivernorth-managed-duration-municipal-5900993) - 2025-01-02 22:00 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-5829704) - 2024-11-29 21:34 UTC [SEC Form 3] [New insider Rivernorth Strategic Holdings, Llc claimed ownership of 76,700 units of Common Shares of Beneficial Interest (SEC Form 3)](https://www.quantisnow.com/insight/new-insider-rivernorth-strategic-holdings-llc-claimed-ownership-of-76700-5794769) - 2024-11-27 14:11 UTC [SEC Form 4] [Adviser Rivernorth Capital Management, Llc disposed of 5,000 units of Common Shares of Beneficial Interest, closing all direct ownership in the company (SEC Form 4)](https://www.quantisnow.com/insight/adviser-rivernorth-capital-management-llc-disposed-of-5000-units-of-5793079) - 2024-10-23 10:03 UTC [Amendment: SEC Form N-2/A filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/amendment-sec-form-n-2a-filed-by-rivernorth-managed-duration-municipal-5734229) - 2024-10-01 23:19 UTC [SEC Form 3] [New insider Browne Jonathan Paul claimed no ownership of stock in the company (SEC Form 3)](https://www.quantisnow.com/insight/new-insider-browne-jonathan-paul-claimed-no-ownership-of-stock-5711291) - 2024-10-01 21:00 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-5710888) - 2024-09-11 19:34 UTC [SEC Form N-CEN filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-cen-filed-by-rivernorth-managed-duration-municipal-income-5690356) - 2024-09-06 18:11 UTC [SEC Form N-CSR filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-csr-filed-by-rivernorth-managed-duration-municipal-income-5685631) - 2024-08-30 01:58 UTC [SEC Form N-PX filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-px-filed-by-rivernorth-managed-duration-municipal-income-5677243) - 2024-08-08 20:38 UTC [SEC Form N-2 filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-2-filed-by-rivernorth-managed-duration-municipal-income-5651263) - 2024-07-01 21:00 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-5587286) - 2024-04-01 21:00 UTC [Dividends] [RiverNorth Closed-End Funds Declare Monthly Distributions](https://www.quantisnow.com/insight/rivernorth-closed-end-funds-declare-monthly-distributions-5381606) - 2024-03-08 15:46 UTC [SEC Form N-CSRS filed by RiverNorth Managed Duration Municipal Income Fund Inc.](https://www.quantisnow.com/insight/sec-form-n-csrs-filed-by-rivernorth-managed-duration-municipal-income-5329725) ## More - Live page with ratings, short volume, options and peers: https://www.quantisnow.com/company/RMM - Earnings history: https://www.quantisnow.com/earnings/RMM - Dividend history: https://www.quantisnow.com/dividends/RMM - Insider transactions: https://www.quantisnow.com/insiders/RMM - Options chain: https://www.quantisnow.com/options/RMM - SEC 8-K filings only: https://www.quantisnow.com/company/RMM/8-k - RSS and alerts for RMM: https://www.quantisnow.com/docs/rss-feeds.md