Company: PNBK
Filing Date: 2025-05-15
Form Type: S-3
Source: 0001437749-25-016950
Chunk: 0

Company: PATRIOT NATIONAL BANCORP INC
Filing Date: 2025-05-15
Form: S-3
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on May 14, 2025</div>

Registration No. 333-

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
<div align='center'>Washington, D.C. 20549

FORM S-3</div>

### REGISTRATION STATEMENT
<div align='center'>UNDER THE SECURITIES ACT OF 1933

PATRIOT NATIONAL BANCORP, INC.

(Exact name of registrant as specified in its charter)</div>

| Connecticut                     | 06-1559137            |
| (State or other jurisdiction of 
 incorporation or organization)  | -I.R.S. Employer      
 Identification Number |

<div align='center'>900 Bedford Street

Stamford, Connecticut 06901

(203) 252-5900

(Address, including zip code, and telephone number,

including area code, of registrant’s principal executive offices)

Steven Sugarman

President

Patriot National Bancorp, Inc.
900 Bedford Street
Stamford, Connecticut 06901
(203) 252-5900

(Name, address, including zip code, and telephone number,

including area code, of agent for service)

With copies to:</div>

| Alan L. Zeiger, Esq    
 Yelena Barychev, Esq   
 Nora Tidey, Esq        
 Blank Rome LLP         
 One Logan Square       
 130 North 18th Street  
 Philadelphia, PA 19103 
 (215) 569-5737         |

Approximate date of commencement of proposed sale to the public: From time to time after this registration statement becomes effective.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration