[Form 4/A] UNITED SECURITY BANCSHARES Amended Insider Trading Activity

Rhea-AI Filing Summary

UNITED SECURITY BANCSHARES director Dora Westerlund reported disposing of her equity stake as part of the company’s merger with Community West Bancshares. On April 1, 2026, she returned 18,770 shares of common stock and 15,000 stock options to the issuer, leaving no reported remaining holdings.

Under the Merger Agreement, each share of United Security common stock was converted into the right to receive 0.4520 share of Community West common stock. Unvested restricted stock awards vested in full and became entitled to the same merger consideration. Her stock options, with an exercise price of $8.17, were converted into a cash right based on the amount, if any, by which the option price exceeded $10.29, the 20‑day VWAP ending March 27, 2026.

Insights

Bank M&A and insider-transactions analyst

Director’s holdings are cashed out or converted due to the completed bank merger.

The filing shows Dora Westerlund, a director of UNITED SECURITY BANCSHARES, disposing of 18,770 common shares and 15,000 stock options back to the issuer when the merger with Community West Bancshares became effective on April 1, 2026.

Each United Security share was converted into the right to receive 0.4520 Community West common share, and unvested restricted stock awards vested and received the same consideration. Her options at an exercise price of $8.17 were converted into a cash right based on any value above the $10.29 20‑day VWAP, so value realization depends on that spread.

The filing indicates 100% of the reported holdings and options were disposed, with total shares and derivative positions reported as zero afterward. This looks like a standard clean-up of an insider’s position when a merger closes, rather than a discretionary market trade.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Westerlund Dora

Role Director

Type	Security	Shares	Price	Value
Disposition	Stock Options	15,000	$0.00	--
Disposition	Common Stock	18,770	$0.00	--

Holdings After Transaction: Stock Options — 0 shares (Direct); Common Stock — 0 shares (Direct)

Footnotes (1)

1. 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. 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).

Key Figures

Common shares disposed: 18,770 shares Stock options disposed: 15,000 options Option exercise price: $8.17 per share +3 more

6 metrics

Common shares disposed 18,770 shares Issuer disposition on April 1, 2026

Stock options disposed 15,000 options Issuer disposition on April 1, 2026

Option exercise price $8.17 per share Stock options on United Security common stock

Merger share exchange ratio 0.4520 shares Community West shares per United Security share

VWAP reference price $10.29 20‑day VWAP ending March 27, 2026

Merger effective time 12:01 a.m. April 1, 2026 Effective time of merger with Community West

Key Terms

Agreement and Plan of Merger, Merger Consideration, restricted stock award, 20 day VWAP, +1 more

5 terms

Agreement and Plan of Merger regulatory

"Disposed of pursuant to the Agreement and Plan of Merger, dated as of December 16, 2025"

An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.

Merger Consideration financial

"was converted into the right to receive 0.4520 of a share of common stock of Community West (the "Merger Consideration")"

Merger consideration is the total payment a company or buyer offers to shareholders of a target company in exchange for combining the two businesses, and can include cash, shares in the surviving company, debt assumption, or a mix of these. Investors care because the form and amount affect the deal’s value, tax consequences, immediate cash received versus future ownership, and the risk and upside of holding new shares — similar to choosing between cash now or stock that could grow later.

restricted stock award financial

"each outstanding unvested Company restricted stock award automatically vested in full and became entitled to the Merger Consideration"

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

20 day VWAP financial

"exceeded $10.29 (20 day VWAP ending 3/27/2026)"

disposition to issuer financial

"transaction_code_description": "Disposition to issuer""

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

X

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Westerlund Dora

(Last) (First) (Middle)

2126 INYO STREET

(Street)

FRESNO CALIFORNIA 93721

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
UNITED SECURITY BANCSHARES [ UBFO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)
04/03/2026

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	04/01/2026		D		18,770	D	$0(1)	0	D

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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
Stock Options	$8.17	04/01/2026		D			15,000	01/25/2023	01/25/2032	Common Stock	15,000	(2)	0	D

Explanation of Responses:

1. 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.

2. 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).

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).

	/s/ Dora Westerlund	04/13/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Dora Westerlund report for UNITED SECURITY BANCSHARES (UBFO)?

Dora Westerlund reported disposing of 18,770 shares of common stock and 15,000 stock options back to UNITED SECURITY BANCSHARES. The dispositions occurred when the company merged into Community West Bancshares and her equity was cashed out or converted under the merger terms.

How were UNITED SECURITY BANCSHARES (UBFO) shares converted in the Community West merger?

Each UNITED SECURITY BANCSHARES common share was converted into the right to receive 0.4520 of a Community West Bancshares common share. This exchange ratio, called the Merger Consideration, applied to all eligible shares other than excluded and dissenting shares at the merger’s effective time.

What happened to Dora Westerlund’s stock options in the UBFO merger?

Her stock options, exercisable at $8.17 per share, were converted into a cash right. That right equals the amount, if any, by which the option’s price exceeded $10.29, which is the 20‑day volume‑weighted average price of Community West stock ending March 27, 2026.

Did Dora Westerlund retain any UNITED SECURITY BANCSHARES shares after the merger?

No. The Form 4/A shows total shares following the transactions as zero for both common stock and options. Her reported holdings in UNITED SECURITY BANCSHARES were fully disposed of at the merger’s effective time, consistent with the company ceasing to exist as a separate entity.

How were UBFO restricted stock awards treated in the Community West merger?

Each outstanding unvested UNITED SECURITY BANCSHARES restricted stock award automatically vested in full at the merger’s effective time. Once vested, these shares became entitled to receive the same 0.4520‑share Merger Consideration in Community West common stock as other eligible common shares.