Company: PNBK
Filing Date: 2025-05-14
Form Type: S-3
Source: 0001437749-25-016921
Chunk: 2

Company: PATRIOT NATIONAL BANCORP INC
Filing Date: 2025-05-14
Form: S-3
Chunk 2
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 Securities

Depositary Shares

Warrants

Purchase Contracts

Subscription Rights

Units</div>

We may offer, issue and sell from time to time up to $250,000,000, together or separately, in one or more offerings, the above-referenced securities. The securities we may offer may be convertible into or exchangeable for other securities. This prospectus describes some of the general terms that may apply to these securities and the general manner in which they may be offered. Each time we offer any securities pursuant to this prospectus, we will provide you with a prospectus supplement that will describe the specific amounts, prices and terms of the securities being offered and the specific manner in which they may be offered. You should read this prospectus, the information incorporated by reference in this prospectus, the accompanying prospectus supplement, including any information incorporated by reference therein, and any applicable free writing prospectus carefully before you invest in the securities described in the applicable prospectus supplement.

Our common stock is listed on the Nasdaq Global Market, or “Nasdaq,” and trades under the ticker symbol “PNBK.”

We may offer and sell these securities to or through one or more underwriters, dealers and agents, directly to purchasers or through a combination of these methods, on a continuous or delayed basis from time to time. See “Plan of Distribution.” The names of any underwriters, dealers or agents involved in the distribution of our securities, their compensation and any option they hold to acquire additional securities will be described in the applicable prospectus supplement. Net proceeds from the sale of securities will be set forth in the applicable prospectus supplement.

Investing in our securities involves a high degree of risk. Before buying any securities, you should carefully read the discussion of the risks of investing in our securities in“Risk Factors”beginning on page 4 of this prospectus and any other risk factors contained in any applicable prospectus supplement and in the documents incorporated by reference herein and therein.

These securities are not savings accounts, deposits or other obligations of any of our bank and non-bank subsidiaries and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

<div align='center'>The date of this prospectus is , 2025.

TABLE OF CONTENTS</div>

| ABOUT THIS PROSPECTUS                                |