[Form 4] UNITED SECURITY BANCSHARES Insider Trading Activity

Rhea-AI Filing Summary

United Security Bancshares director Stanley J. Cavalla disposed of his shares as part of the company’s merger into Community West Bancshares. On April 1, 2026, 679,453 directly held shares and 270 trust-held shares of United Security common stock were surrendered to the issuer in exchange for Community West stock under a pre-agreed merger ratio of 0.4520 Community West shares for each United Security share. Following these issuer dispositions tied to the merger closing, Cavalla no longer held United Security common stock.

Insights

Bank M&A and insider-transactions analyst

Director’s entire position was cashed out via stock-for-stock bank merger mechanics.

The filing shows director Stanley J. Cavalla disposed of all reported United Security Bancshares common shares in issuer-directed transactions at $10.51 per share. This coincided with the completion of the merger into Community West Bancshares, executed under a signed Agreement and Plan of Merger.

The footnote explains that, at the April 1, 2026 effective time, each United Security share converted into the right to receive 0.4520 Community West common shares as merger consideration. These are not open‑market sales or discretionary trades; they are automatic conversions required by the merger terms.

Because the transactions are purely mechanical merger-related dispositions, the informational value for sentiment is limited. They mainly confirm the merger closed and that United Security equity rolled into Community West equity at the stated 0.4520 exchange ratio, with no remaining United Security position reported for Cavalla after the effective time.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider CAVALLA STANLEY J

Role Director

Type	Security	Shares	Price	Value
Disposition	Common Stock	679,453	$10.51	$7.14M
Disposition	Common Stock	270	$10.51	$3K

Holdings After Transaction: Common Stock — 0 shares (Direct); Common Stock — 0 shares (Indirect, Trust)

Footnotes (1)

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Key Figures

Direct shares disposed: 679,453 shares Indirect shares disposed (trust): 270 shares Disposition price per share: $10.51 per share +3 more

6 metrics

Direct shares disposed 679,453 shares Issuer disposition on April 1, 2026

Indirect shares disposed (trust) 270 shares Issuer disposition via trust on April 1, 2026

Disposition price per share $10.51 per share Non-derivative common stock disposition

Exchange ratio 0.4520 shares Community West shares per United Security share as merger consideration

Shares after transaction 0 shares Total United Security common stock held following dispositions

Transactions classified as disposals 2 transactions Both coded D, disposition to issuer

Key Terms

Agreement and Plan of Merger, Merger Consideration, restricted stock award, disposition to issuer

4 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.

disposition to issuer regulatory

"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

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^*

CAVALLA STANLEY J

(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)

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		679,453	D	$10.51(1)	0	D
Common Stock	04/01/2026		D		270	D	$10.51(1)	0	I	Trust

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

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 (the "Effective Time"), 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"); each outstanding unvested Company restricted stock award automatically vested in full and became entitled to the Merger Consideration.

Remarks:

	/s/ Stan Cavalla	04/01/2026
	** 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 did Stanley J. Cavalla report in this Form 4 for UBFO?

He reported disposing of all his United Security Bancshares common stock in connection with its merger into Community West. The transactions were issuer-directed, tied to the merger agreement rather than open-market buying or selling, and left him with no remaining United Security shares.

How many United Security Bancshares shares did Cavalla dispose of?

He disposed of 679,453 directly held shares and 270 indirectly held shares held through a trust. All these United Security Bancshares common shares were surrendered to the issuer at the merger’s effective time and converted into the right to receive Community West common stock.

What merger terms affected UBFO director Stanley J. Cavalla’s shares?

Under the merger agreement, each United Security Bancshares common share converted into the right to receive 0.4520 Community West Bancshares common shares. This exchange ratio, applied at the April 1, 2026 effective time, drove Cavalla’s reported issuer dispositions and eliminated his remaining United Security holdings.

Were Cavalla’s UBFO transactions open-market sales or routine merger conversions?

They were routine merger conversions, not open-market sales. The Form 4 uses code D for disposition to issuer, and the footnote ties the events to the closing of the merger with Community West, where shares were converted into merger consideration stock at a fixed exchange ratio.

What happened to Cavalla’s trust-held United Security Bancshares shares?

A trust associated with Cavalla disposed of 270 United Security common shares to the issuer under the same merger terms. These indirectly held shares were treated like his directly owned shares, converting into the right to receive Community West common stock when the merger became effective on April 1, 2026.