RMM Form 3 – RiverNorth Files Initial Disclosure Showing No Direct Holdings

Rhea-AI Filing Summary

RiverNorth Financial Holdings, LLC filed an initial Form 3 on 09/18/2025 reporting its relationship to RiverNorth Managed Duration Municipal Income Fund, Inc. (RMM) as an officer and as an affiliate of the adviser. The filing lists the reporting person's address in West Palm Beach, FL, and shows 0 common shares beneficially owned (direct). The form is signed by Marc Collins on 09/18/2025.

Insights

Financial Analyst

TL;DR: Initial Form 3 reports no beneficial ownership and identifies the filer as an officer and adviser affiliate.

The filing documents the required Section 16 disclosure for RiverNorth Financial Holdings, LLC, related to RMM. It states the reporting person holds 0 common shares and files as an officer and affiliate of the adviser. For investors, this is a routine ownership/insider-status disclosure rather than an economic position or transaction. There are no derivative holdings or changes in security ownership reported.

Corporate Governance Expert

TL;DR: Governance disclosure completed; indicates officer/affiliate status but no direct equity stake reported.

The Form 3 establishes the reporting relationship and fulfills initial reporting obligations under Section 16. It provides the reporting entity's address and is signed by Marc Collins. Absence of beneficial ownership suggests no direct equity interest at filing; the document does not disclose any control, transaction, or beneficial indirect ownership beyond the affiliate designation.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

RiverNorth Financial Holdings, LLC

(Last) (First) (Middle)

360 S. ROSEMARY AVE

SUITE 1420

(Street)

WEST PALM BEACH FL 33401

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/18/2025

3. Issuer Name and Ticker or Trading Symbol
RiverNorth Managed Duration Municipal Income Fund, Inc. [ RMM ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Affiliate of the Adviser

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Shares of Beneficial Interest	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Marc Collins	09/18/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

Who filed the Form 3 for RMM?

RiverNorth Financial Holdings, LLC filed the Form 3.

What relationship to RMM does the reporting person have?

The filer is listed as an officer and an affiliate of the adviser to RMM.

How many common shares does the reporting person beneficially own?

The filing reports 0 common shares beneficially owned (direct).

When was the Form 3 filed/signed?

The Form 3 is dated and signed on 09/18/2025 by Marc Collins.

Are there any derivative securities reported on the Form 3?

No. The filing lists no derivative securities beneficially owned.