$RMM

$13.29 +$0.01 (0.08%) Close

$RMM Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 19.7M shares outstanding

Who owns RMM?

By type of holder

Institutions 19.2% Insiders 0.1% Everyone else 80.7%

Concentration Top 10 holders own 13.0%

Robinson Capital Management, LLC 2.1% · Wells Fargo & Company/mn 2.1%

Institutional ownership

19.2%

+1.4 pts vs last qtr

Institutional holders

+1 vs last qtr

Net shares bought

+270.3K

by institutions in Q2 2026

New / sold out

7 / 6

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Guggenheim Capital LLC +194.5K
Arax Advisory Partners NEW +167.2K

Biggest sellers in Q2 2026

U.S. Capital Wealth Advisors, LLC SOLD OUT −179.7K
Arkadios Wealth Advisors SOLD OUT −108.0K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for RiverNorth Managed Duration Municipal Income Fund Inc in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for RiverNorth Managed Duration Municipal Income Fund Inc.

How patient are the owners?

Institutional shares by how long they've been held

5+ years35% 3–5 years12% 1–3 years28% Under 1 year25%

Quarterly turnover

17.3%

of institutional shares changed hands

Top 10 managers, median time held

3.3 years

Super Investors

Investment managers reporting RMM on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
RC Robinson Capital Management, LLC	409.4K	2.07%	−22.0K (−5.1%)	2024	2.7%
Shares held by quarter Peak holding431.4K (Q1'26) Change over 8 quarters+338.6K Share of the company2.070% Robinson Capital Management, LLC's full portfolio →
WF Wells Fargo & Company/mn	404.9K	2.05%	+9.6K (+2.4%)	≤2021	0.0%
Shares held by quarter Peak holding556.7K (Q2'25) Change over 8 quarters−103.1K Share of the company2.050% Wells Fargo & Company/mn's full portfolio →

Robinson Capital Management, LLC

409.4K

% of company

2.07%

Change vs last qtr

−22.0K (−5.1%)

Held since

2024

Wells Fargo & Company/mn

404.9K

% of company

2.05%

Change vs last qtr

+9.6K (+2.4%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding RiverNorth Managed Duration Municipal Income Fund Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting RMM on Form N-PORT; together they hold 2.1% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
RT Robinson Tax Advantaged Income Fund Investment Managers Series Trust	$6.05M	409.4K	2.07%	2.72%	June 30, 2026
MS Multi-Hedge Strategies Fund Rydex Variable Trust	$2.87K	211	0.00%	0.01%	December 31, 2025

Robinson Tax Advantaged Income Fund

Investment Managers Series Trust

Position value

$6.05M

% of company

2.07%

% of the fund

2.72%

As of

June 30, 2026

Multi-Hedge Strategies Fund

Rydex Variable Trust

Position value

$2.87K

% of company

0.00%

% of the fund

0.01%

As of

December 31, 2025

1 more funds behind a free account

See every fund holding RiverNorth Managed Duration Municipal Income Fund Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
GP Galley Patrick W. Insider	20.0K	0.10%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.100% Galley Patrick W.'s insider activity →
BJ Browne Jonathan Paul Insider	800	0.00%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.000% Browne Jonathan Paul's insider activity →

Galley Patrick W.

Insider

20.0K

% of company

0.10%

Change vs last qtr

—

Held since

—

Browne Jonathan Paul

Insider

800

% of company

0.00%

Change vs last qtr

—

Held since

—

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