Director at United Security Bancshares (UBFO) exits shares in completed merger

Rhea-AI Filing Summary

UNITED SECURITY BANCSHARES director Brian Tkacz disposed of his equity in connection with the company’s merger into Community West Bancshares. On April 1, 2026 he returned 16,871 shares of common stock to the issuer at $10.51 per share and 15,000 stock options were disposed of to the issuer.

Under the Merger Agreement, each United Security common share (other than excluded and dissenting shares) was converted into the right to receive 0.4520 share of Community West common stock, and unvested restricted stock awards vested and became entitled to this merger consideration. At the effective time, each of Tkacz’s stock options was converted into a cash right based on the option terms and a $10.29 20‑day VWAP reference price.

Insights

Banking equity analyst

Director’s stake is cashed out via a completed bank merger, not an open-market sale.

The transactions show Brian Tkacz, a director of United Security Bancshares, disposing of 16,871 common shares at $10.51 per share and 15,000 stock options back to the issuer. These moves occur at the merger’s effective time, so they are mechanically triggered by the deal terms rather than discretionary trading.

The footnotes explain that each United Security share converts into 0.4520 of a Community West Bancshares share and that stock options convert into a cash right using a $10.29 20‑day VWAP reference. This is standard merger consideration treatment. For investors, the filing mainly documents how one director’s equity was settled at closing, rather than signaling a new view on the stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Tkacz Brian

Role Director

Type	Security	Shares	Price	Value
Disposition	Stock Options	15,000	$0.00	--
Disposition	Common Stock	16,871	$10.51	$177K

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 (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. 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: 16,871 shares Share disposition price: $10.51 per share Stock options disposed: 15,000 options +3 more

6 metrics

Common shares disposed 16,871 shares Issuer disposition on April 1, 2026 at $10.51 per share

Share disposition price $10.51 per share Price for 16,871 United Security common shares returned to issuer

Stock options disposed 15,000 options Options on United Security common stock disposed of to issuer

Option exercise price $11.05 per share Exercise price of disposed United Security stock options

Merger share exchange ratio 0.4520 share Community West common stock per United Security common share

VWAP reference price $10.29 20‑day VWAP ending March 27, 2026 used for option cash right

Key Terms

Agreement and Plan of Merger, Merger Consideration, dissenting shares, 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.

dissenting shares regulatory

"each share of Company common stock, other than excluded shares and dissenting shares, was converted"

Dissenting shares are shares held by investors who formally oppose a proposed corporate action—such as a merger or takeover—and choose to demand a cash payment for the value of their stock instead of accepting the deal’s terms. This matters to investors because it can slow or complicate a transaction, trigger a legal process to set a fair price, and affect how much cash a company must pay out, which in turn influences the financial outcome for all shareholders.

20 day VWAP financial

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

issuer disposition financial

"transaction_action": "issuer disposition""

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^*

Tkacz Brian

(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		16,871	D	$10.51(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	$11.05	04/01/2026		D			15,000	12/19/2018	12/19/2027	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 (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.

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:

	/s/ Brian Tkacz	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 United Security Bancshares (UBFO) director Brian Tkacz report on this Form 4?

He reported disposing of equity back to the issuer as part of a completed merger. The filing shows 16,871 common shares returned at $10.51 per share and 15,000 stock options disposed of, leaving him with no reported post-transaction holdings in these securities.

How many United Security Bancshares (UBFO) shares did Brian Tkacz dispose of and at what price?

He disposed of 16,871 shares of United Security Bancshares common stock at $10.51 per share. The disposition was to the issuer in connection with the merger into Community West Bancshares, rather than an open-market sale on a stock exchange.

What happened to Brian Tkacz’s United Security Bancshares stock options in the merger?

He disposed of 15,000 stock options to the issuer at an exercise price of $11.05 per share. Under the Merger Agreement, each option converted into a right to receive any value based on the option terms and a $10.29 20‑day volume-weighted average price reference.

How were United Security Bancshares (UBFO) common shares converted in the merger with Community West?

Each United Security common share, other than excluded and dissenting shares, was converted into the right to receive 0.4520 of a share of Community West Bancshares common stock. Unvested restricted stock awards also vested and became entitled to receive that same merger consideration at closing.

Is Brian Tkacz’s Form 4 disposal a discretionary sale of United Security Bancshares stock?

No, the Form 4 shows an issuer disposition tied to the merger effective time. The equity positions were settled automatically under the Agreement and Plan of Merger, rather than through a voluntary open-market sale initiated independently by the director.

When did the United Security Bancshares and Community West Bancshares merger become effective?

The merger became effective at 12:01 a.m. on April 1, 2026. At that effective time, United Security Bancshares merged into Community West Bancshares, and the equity conversion terms for common stock, restricted stock, and stock options described in the Form 4 took effect.