Company: PNBK
Filing Date: 2025-03-31
Form Type: NT 10-K
Source: 0001628280-25-015696
Chunk: 0

Company: PATRIOT NATIONAL BANCORP INC
Filing Date: 2025-03-31
Form: NT 10-K
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 12b-25

### NOTIFICATION OF LATE FILING
(Check One): ☒ Form10-K ☐ Form 20-F ☐ Form 11-K ☐ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR

For Period Ended:

#### December 31, 2024
| ☐ |     | Transition Report on Form 10-K |

| ☐ |     | Transition Report on Form 20-F |

| ☐ |     | Transition Report on Form 11-K |

| ☐ |     | Transition Report on Form 10-Q |

| ☐ |     | Transition Report on Form N-SAR |

For the Transition Period Ended: _____________________

<div align='center'>NOTHING IN THIS FORM SHALL BE CONSTRUED TO IMPLY THAT THE COMMISSION HAS VERIFIED ANY INFORMATION CONTAINED HEREIN.</div>

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

# PART I - REGISTRANT INFORMATION

#### PATRIOT NATIONAL BANCORP, INC.

#### Full Name of Registrant

#### Former Name if Applicable

#### 900 Bedford Street
<div align='center'>Address of Principal Executive Office (Street and Number)</div>

#### Stamford, Connecticut

#### City, State and Zip Code

# PART II - RULES 12b-25(b) AND (c)
If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

| ☒ |     | -a |     | The reasons described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense.                                                                                                                                                                                                                                                                      |
| ☒ |     | -b |     | The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, 11-K or Form N-SAR, or portion thereof will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q, or portion thereof will be filed on or before the fifth calendar day following the prescribed due date; and |
|   |     | -c |     | The accountant