Heather Hammack - 01 Apr 2026 Form 4/A - Amendment Insider Report for UNITED SECURITY BANCSHARES (UBFO)

Reporting relationship: Director
Issuer ticker: UBFO
Reported as of: 01 Apr 2026
Net transaction value: $0
SEC form: 4/A - Amendment
Accepted by SEC: 13 Apr 2026, 14:34:55 UTC
Original report date: 03 Apr 2026
Prior SEC filing: 29 Oct 2025
Source filing: View source filing
Reporting owner signature: /s/ Heather Hammack

Key filing fact

Heather Hammack filed Form 4/A - Amendment for UNITED SECURITY BANCSHARES (UBFO) on 13 Apr 2026.

Key facts

This page summarizes Heather Hammack's Form 4/A - Amendment filing for UNITED SECURITY BANCSHARES (UBFO).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 13 Apr 2026, 14:34.

Change

Previous filing in this sequence was filed on 29 Oct 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4/A - Amendment disclosures.

View source filing

Reporting Owners (1)

CIK 0001886182 Primary reporting owner

Hammack Heather

Relationship: Director
Address: 2126 INYO STREET, FRESNO
Signature: /s/ Heather Hammack
Signature date: 13 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

UBFO transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -16,398
Change %: -100%
Price: $10.51^*
Shares after: 0
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

UBFO transaction Derivative

Stock Options

Disposed to Issuer

Transaction value
Shares: -15,000
Change %: -100%
Price
Shares after: 0
Date: 01 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 15,000
Exercise price: $8.17
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Heather Hammack is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 2 footnotes

Footnote F1

Disposed of pursuant to the Agreement and Plan of Merger, dated as of December 16, 2025 (the "Merger Agreement"), by and between Community West Bancshares ("Community West") and United Security Bancshares (the "Company"), providing for the Company to merge (the "Merger") with and into Community West with Community West being the surviving entity. The Merger became effective at 12:01 a.m. on April 1, 2026, at which time (i) each share of Company common stock, other than excluded shares and dissenting shares, was converted into the right to receive 0.4520 of a share of common stock of Community West (the "Merger Consideration"); (ii) each outstanding unvested Company restricted stock award automatically vested in full and became entitled to the Merger Consideration.

Footnote F2

Pursuant to the Merger Agreement, at the effective time of the merger, each of the reporting person's stock options were converted into the right to receive the amount, if any, by which the option's price exceeded $10.29 (20 day VWAP ending 3/27/2026).

SEC remarks

This amendment to the Reporting Person's Form 4 filed on April 3, 2026, is being filed to (i) clarify that the Reporting Person is no longer subject to Section 16 reporting with respect to the Company, (ii) correct the disposition price of shares of Company common stock, and (iii) make clarifying changes to footnote (1).