Company: RFMZ
Filing Date: 2025-05-21
Form Type: 424B5
Source: 0001398344-25-009954
Chunk: 20

Company: RiverNorth Flexible Municipal Income Fund II, Inc.
Filing Date: 2025-05-21
Form: 424B5
Chunk 20
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underwriter” within the meaning of the Securities
Act, and the compensation paid to the Distributor may be deemed to be underwriting commissions or discounts.

The Fund has agreed to indemnify
the Distributor against certain civil liabilities, including liabilities under the Securities Act. The Distributor has agreed to indemnify
the Sub-Placement Agent against certain civil liabilities, including liabilities under the Securities Act.

The offering of Common Shares
pursuant to the Distribution Agreement will terminate upon the earlier of (1) the sale of all Common Shares subject to the Distribution
Agreement or (2) the termination of the Distribution Agreement. The Distribution Agreement may be terminated at any time, without the
payment of any penalty, by the Fund or by the Distributor, on sixty days’ written notice to the other party.

| S-9 |

The Common Shares may not be
sold through the Distributor or the Sub-Placement Agent without delivery or deemed delivery of this Prospectus Supplement and the accompanying
Prospectus describing the method and terms of the offering of the Common Shares.

The Sub-Placement Agent, its
affiliates or their respective employees hold or may hold in the future, directly or indirectly, investment interests in the Fund. The
interests held by the Sub-Placement Agent, its affiliates or their respective employees are not attributable to, and no investment discretion
is held by, the Sub-Placement Agent, its affiliates or their respective affiliates.

The principal business address
of ALPS Distributors, Inc. is 1290 Broadway, Suite 1000, Denver, Colorado 80203. The principal business address of UBS Securities LLC
is 1285 Avenue of the America, New York, New York 10019.

<div align='center'>LEGAL MATTERS</div>

Certain legal matters in connection
with the Common Shares will be passed upon for the Fund by Faegre Drinker Biddle & Reath LLP. Faegre Drinker Biddle & Reath LLP
may rely as to certain matters of Maryland law on the opinion of Shapiro Sher Guinot & Sandler, P.A.

<div align='center'>INCORPORATION BY REFERENCE</div>

This Prospectus Supplement and the accompanying Prospectus constitutes part of a registration statement that the Fund has filed with the with the Securities and Exchange Commission (the “SEC”). The Fund is permitted to “incorporate by reference” the information that it files with the SEC, which means that the Fund can disclose important information to you