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United Security (NASDAQ: UBFO) director exits holdings in Community West merger

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

UNITED SECURITY BANCSHARES director Nabeel Mahmood reported disposing of his equity in connection with the company’s merger into Community West Bancshares. He surrendered 23,556.883 shares of common stock at $10.51 per share and 15,000 stock options back 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 of a share of Community West common stock, and unvested restricted stock awards vested and became entitled to this merger consideration. The filing shows Mahmood with zero United Security common shares and options remaining after these issuer dispositions.

Positive

  • None.

Negative

  • None.
Insider Mahmood Nabeel
Role Director
Type Security Shares Price Value
Disposition Stock Options 15,000 $0.00 --
Disposition Common Stock 23,556.883 $10.51 $248K
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).
Common shares disposed 23,556.883 shares Issuer disposition of United Security common stock in merger
Common share price $10.51 per share Reported transaction price for common stock disposition
Stock options disposed 15,000 options Issuer disposition of stock options at merger effective time
Option exercise price $11.05 per share Exercise price of disposed stock options
Merger share exchange ratio 0.4520 Community West shares Per United Security common share converted in merger
Merger VWAP reference $10.29 20-day VWAP ending March 27, 2026 used for options
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
"each share of Company common stock ... was converted into the right to receive 0.4520 of a share ... (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.
20 day VWAP financial
"the option's price exceeded $10.29 (20 day VWAP ending 3/27/2026)."
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.
SEC Form 4
FORM 4UNITED 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*
Mahmood Nabeel

(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)
XDirector10% 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock04/01/2026D23,556.883D$10.51(1)0D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options$11.0504/01/2026D15,00012/19/201812/19/2027Common Stock15,000(2)0D
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/ Nabeel Mahmood04/01/2026
** Signature of Reporting PersonDate
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 UBFO director Nabeel Mahmood report?

Director Nabeel Mahmood reported disposing of his United Security Bancshares equity in a merger-related transaction. He surrendered 23,556.883 common shares at $10.51 per share and 15,000 stock options back to the issuer as part of the merger completion.

How many UBFO common shares did Mahmood give up in this Form 4?

Mahmood disposed of 23,556.883 shares of United Security Bancshares common stock. These shares were returned to the issuer at a reported transaction price of $10.51 per share in connection with the closing of the merger into Community West Bancshares.

What happened to Nabeel Mahmood’s UBFO stock options in the merger?

Mahmood’s 15,000 stock options were disposed of to the issuer at the merger effective time. Under the merger agreement, each option was converted into a right tied to the option’s exercise price relative to a $10.29 20-day volume-weighted average price.

What merger terms affected UBFO shareholders in this transaction?

At the merger’s effective time, each share of United Security common stock, excluding certain categories, was converted into the right to receive 0.4520 of a Community West Bancshares common share. Unvested restricted stock awards fully vested and became entitled to receive this same merger consideration.

Does Nabeel Mahmood hold any UBFO shares after this reported transaction?

According to the filing, Mahmood’s reported holdings in United Security Bancshares common stock and related stock options are zero shares after the merger-related dispositions. This reflects the completion of the equity conversion and issuer dispositions at the merger’s effective time.