Sec Form 4 Filing - Salas Carlos P @ PATRIOT NATIONAL BANCORP INC - 2026-04-30

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person Salas Carlos P 2. Issuer Name and Ticker or Trading Symbol PATRIOT NATIONAL BANCORP INC [ PNBK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP & Chief Financial Officer (Last) (First) (Middle) C/O PATRIOT NATIONAL BANCORP, INC., 900 BEDFORD STREET 3. Date of Earliest Transaction (MM/DD/YY) 04/30/2026 (Street) STAMFORD, CT06901 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/30/2026 M( 1 ) 333,333 A $ 0 ( 1 ) 333,333 D Common Stock 04/30/2026 F( 2 ) 121,776 D $ 1.23 ( 2 ) 211,557 D Common Stock 1,333,334 I By HECA Management LLC ( 3 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units $ 0 04/30/2026 M( 1 ) 333,333 04/30/2026 04/30/2026 Common Stock 333,333 $ 0 666,667 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Salas Carlos P C/O PATRIOT NATIONAL BANCORP, INC. 900 BEDFORD STREET STAMFORD, CT06901 X EVP & Chief Financial Officer Signatures /s/ Carlos P. Salas 05/04/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On April 30, 2025, the Reporting Person was granted Restricted Stock Units ("RSUs") equal to 1,000,000 shares of Common Stock of the Issuer, which will vest over three years (333,333 shares, 333,333 shares, and 333,334 shares respectively as of April 30, 2026, 2027 and 2028). On April 30, 2026, the first installment of 333,333 RSUs vested and settled and the Issuer delivered shares of Common Stock in settlement thereof. No consideration was paid by the Reporting Person in connection with the settlement. ( 2 )Represents 121,776 shares of Common Stock withheld by the Issuer upon settlement of the RSUs to satisfy the Reporting Person's applicable tax withholding obligations. The shares were withheld at a price of $1.23 per share, representing the closing price of the Issuer's Common Stock on April 30, 2026. The withheld shares were not delivered to the Reporting Person. ( 3 )HECA Management LLC ("HECA Management") purchased the securities described herein as part of the $57.75 million private placement of the Issuer that was completed on March 20, 2025. The Reporting Person is the managing member of HECA Management and is deemed to hold sole voting and dispositive power over the securities held by HECA Management.

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 4(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.