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United Security Bancshares (UBFO) 10K Form and Latest SEC Filings 2026

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As of 05/5/2026

Latest United Security Bancshares SEC Filings & Recent Activity

United Security Bancshares (NASDAQ:UBFO) has submitted 484+ documents to the U.S. Securities and Exchange Commission (SEC) since 2017. For investors, these filings are the primary source of verified financial data — covering everything from annual revenue and debt levels in the 10-K, to material business events in 8-K current reports, to insider buying and selling activity in Form 4 disclosures. The most recent filing was a Form S-8 POS submitted on April 13, 2026.

Form 4
UNITED SECURITY BANCSHARES Reports Ownership Change on Apr. 13, 2026

Form 4 filings disclose changes in stock ownership by company insiders, including purchases, sales, grants, and option exercises.

View insider ownership

8-K
United Security Bancshares Files Current Report on Apr. 1, 2026

An 8-K is filed when a material corporate event occurs, such as an acquisition, leadership change, or financial update.

View filing

10-K
United Security Bancshares Files Annual Report on Mar. 26, 2026

The 10-K contains United Security Bancshares's audited financial statements, revenue, earnings, and risk factors for the prior fiscal year.

View earnings history

United Security Bancshares SEC Filing History

Browse United Security Bancshares' complete SEC filing history using the filters below. Filter by form type - 10-K, 10-Q, 8-K, Form 4, and more - or set a custom date range to find a filing.

DateFilerForm TypeView
04/13/2026 2:48 PM
United Security Bancshares (1137547) Filer
Form S-8 POS
04/13/2026 2:45 PM
United Security Bancshares (1137547) Filer
Form 15-12G
04/13/2026 1:31 PM
ELLITHORPE G THOMPSON (1145948) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:32 PM
United Security Bancshares (1137547) Issuer
Westerlund Dora (1886146) Reporting
Form 4/A
04/13/2026 1:33 PM
QUIGLEY SUSAN (1694370) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:34 PM
NEWBY KENNETH D (1606273) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:34 PM
Hammack Heather (1886182) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:35 PM
Tkacz Brian (1723825) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:36 PM
CAVALLA STANLEY J (1144508) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:37 PM
Kinross David A (1361339) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:37 PM
Saunders Porsche A (2014036) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:38 PM
United Security Bancshares (1137547) Issuer
WOODS DENNIS R (1144507) Reporting
Form 4/A
04/13/2026 1:39 PM
United Security Bancshares (1137547) Issuer
WILLIAMS KEVIN J (2083371) Reporting
Form 4/A
04/13/2026 1:27 PM
GILL JAGROOP (1981173) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:29 PM
Mahmood Nabeel (1723975) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/13/2026 1:29 PM
United Security Bancshares (1137547) Issuer
Yarbenet William M. (1470204) Reporting
Form 4/A
04/13/2026 1:30 PM
OBERG ROBERT C JR (1243275) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
04/03/2026 7:00 PM
United Security Bancshares (1137547) Issuer
Westerlund Dora (1886146) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:01 PM
Kinross David A (1361339) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:01 PM
QUIGLEY SUSAN (1694370) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:04 PM
NEWBY KENNETH D (1606273) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:05 PM
Mahmood Nabeel (1723975) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:06 PM
Hammack Heather (1886182) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:06 PM
GILL JAGROOP (1981173) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:07 PM
Tkacz Brian (1723825) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:08 PM
ELLITHORPE G THOMPSON (1145948) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:08 PM
United Security Bancshares (1137547) Issuer
Yarbenet William M. (1470204) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:09 PM
OBERG ROBERT C JR (1243275) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:09 PM
CAVALLA STANLEY J (1144508) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:10 PM
United Security Bancshares (1137547) Issuer
WOODS DENNIS R (1144507) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:10 PM
United Security Bancshares (1137547) Issuer
WILLIAMS KEVIN J (2083371) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
04/03/2026 7:11 PM
Saunders Porsche A (2014036) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
04/01/2026 10:43 AM
Nasdaq Stock Market LLC (1354457) Filed by
United Security Bancshares (1137547) Subject
Form 25-NSE
04/01/2026 9:12 AM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/30/2026 7:53 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
03/26/2026 6:21 PM
OBERG ROBERT C JR (1243275) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
03/26/2026 5:02 AM
United Security Bancshares (1137547) Filer
Form 10-K
Annual report pursuant to Section 13 or 15(d)  
03/20/2026 3:55 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
02/09/2026 12:08 PM
GILL JAGROOP (1981173) Reporting
United Security Bancshares (1137547) Issuer
Form 5
Annual statement of changes in beneficial ownership of securities  
02/09/2026 12:10 PM
Mahmood Nabeel (1723975) Reporting
United Security Bancshares (1137547) Issuer
Form 5
Annual statement of changes in beneficial ownership of securities  
02/09/2026 12:19 PM
OBERG ROBERT C JR (1243275) Reporting
United Security Bancshares (1137547) Issuer
Form 5
Annual statement of changes in beneficial ownership of securities  
02/09/2026 12:20 PM
ELLITHORPE G THOMPSON (1145948) Reporting
United Security Bancshares (1137547) Issuer
Form 5
Annual statement of changes in beneficial ownership of securities  
01/28/2026 12:55 PM
Saunders Porsche A (2014036) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
01/28/2026 12:55 PM
Kinross David A (1361339) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
01/28/2026 12:56 PM
United Security Bancshares (1137547) Issuer
Yarbenet William M. (1470204) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
01/28/2026 12:52 PM
United Security Bancshares (1137547) Issuer
WILLIAMS KEVIN J (2083371) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
01/28/2026 12:53 PM
United Security Bancshares (1137547) Issuer
WOODS DENNIS R (1144507) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
01/22/2026 3:15 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/05/2026 5:12 PM
Kinross David A (1361339) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
12/18/2025 4:24 PM
United Security Bancshares (1137547) Subject
Form 425
12/18/2025 4:06 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
12/18/2025 4:12 PM
United Security Bancshares (1137547) Subject
Form 425
12/18/2025 3:34 PM
Community West Bancshares (1127371) Filed by
United Security Bancshares (1137547) Subject
Form 425
12/17/2025 8:14 PM
Community West Bancshares (1127371) Filed by
United Security Bancshares (1137547) Subject
Form 425
12/17/2025 8:15 PM
Community West Bancshares (1127371) Filed by
United Security Bancshares (1137547) Subject
Form 425
12/17/2025 8:16 PM
Community West Bancshares (1127371) Filed by
United Security Bancshares (1137547) Subject
Form 425
12/17/2025 8:16 PM
Community West Bancshares (1127371) Filed by
United Security Bancshares (1137547) Subject
Form 425
12/17/2025 4:02 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
12/17/2025 7:46 AM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
12/17/2025 7:48 AM
Community West Bancshares (1127371) Filed by
United Security Bancshares (1137547) Subject
Form 425
12/08/2025 1:40 PM
OBERG ROBERT C JR (1243275) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
12/03/2025 4:39 PM
OBERG ROBERT C JR (1243275) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
11/20/2025 2:20 PM
NEWBY KENNETH D (1606273) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
11/20/2025 12:56 PM
United Security Bancshares (1137547) Issuer
Yarbenet William M. (1470204) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
11/07/2025 4:07 PM
United Security Bancshares (1137547) Filer
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
10/29/2025 4:39 PM
NEWBY KENNETH D (1606273) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 4:40 PM
QUIGLEY SUSAN (1694370) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 4:40 PM
Tkacz Brian (1723825) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 4:41 PM
United Security Bancshares (1137547) Issuer
Westerlund Dora (1886146) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 4:43 PM
United Security Bancshares (1137547) Issuer
WOODS DENNIS R (1144507) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 4:43 PM
ELLITHORPE G THOMPSON (1145948) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 4:38 PM
Mahmood Nabeel (1723975) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 4:35 PM
GILL JAGROOP (1981173) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 4:37 PM
Hammack Heather (1886182) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/29/2025 1:43 PM
CAVALLA STANLEY J (1144508) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
10/16/2025 3:25 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
09/25/2025 11:53 AM
United Security Bancshares (1137547) Issuer
WILLIAMS KEVIN J (2083371) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
09/24/2025 3:40 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
08/26/2025 1:42 PM
United Security Bancshares (1137547) Issuer
WILLIAMS KEVIN J (2083371) Reporting
Form 3
Initial statement of beneficial ownership of securities  
08/11/2025 12:41 PM
GILL JAGROOP (1981173) Reporting
United Security Bancshares (1137547) Issuer
Form 4/A
08/07/2025 4:35 PM
GILL JAGROOP (1981173) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
08/07/2025 3:46 PM
United Security Bancshares (1137547) Filer
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
07/17/2025 3:23 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
07/15/2025 4:27 PM
United Security Bancshares (1137547) Filer
Form 11-K
Annual reports of employee stock purchase, savings and similar plans pursuant to Section 15(d)  
06/26/2025 12:48 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/17/2025 8:26 AM
United Security Bancshares (1137547) Filer
Form S-8 POS
06/16/2025 3:44 PM
United Security Bancshares (1137547) Filer
Form S-8
Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans  
06/04/2025 4:12 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/02/2025 4:30 PM
United Security Bancshares (1137547) Filer
Form 8-K/A
05/13/2025 3:39 PM
United Security Bancshares (1137547) Filer
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/08/2025 12:53 PM
United Security Bancshares (1137547) Issuer
Yarbenet William M. (1470204) Reporting
Form 4
Statement of changes in beneficial ownership of securities  
05/08/2025 12:45 PM
NEWBY KENNETH D (1606273) Reporting
United Security Bancshares (1137547) Issuer
Form 4
Statement of changes in beneficial ownership of securities  
(Data available from 1/1/2016 forward)

United Security Bancshares SEC Filings - Frequently Asked Questions

United Security Bancshares (UBFO) has submitted 484+ filings to the SEC since 2017. You can browse the complete history or filter by form type using the tools above.

United Security Bancshares's fiscal year ends on December 31. The company typically files its 10-K annual report by the end of February, covering the prior fiscal year's financial results.

The most recent filing was a Form S-8 POS submitted on April 13, 2026. View the full filing using the link above.

SEC Filing Types: 10-K, 10-Q, 8-K and More

SEC filings are legally required disclosures that public companies submit to the U.S. Securities and Exchange Commission. Unlike press releases or earnings call transcripts, these documents are filed under legal obligation — meaning the financial data they contain is audited, standardized, and subject to penalties if materially false. For investors, that makes SEC filings the most reliable primary source available for evaluating a company's true financial position.

Yes. All SEC filings are publicly available through the SEC's EDGAR database and on financial research platforms like MarketBeat. Companies are required by law to make these disclosures accessible to all investors — meaning retail investors have access to the same source documents as institutional analysts.

A 10-K is an annual report containing audited financial statements and a full review of the company's business — it is the most comprehensive filing a company makes each year. A 10-Q is a shorter, unaudited quarterly update filed three times per year between annual reports. Investors typically use the 10-K for deep fundamental analysis and the 10-Q to track whether the company is on pace with its guidance mid-year.

The most important filing for fundamental investors. Filed once per year, the 10-K contains audited financial statements, revenue and earnings trends, debt obligations, risk factors, and management's own assessment of the business. Reading the risk factors section and comparing year-over-year financials can reveal issues that don't show up in analyst summaries.

An unaudited financial update filed three times per year (the 10-K covers Q4). Investors use 10-Qs to track whether guidance is on pace, monitor changes in cash flow or inventory, and catch any mid-year shifts in business conditions before they become headline news.

Filed within four business days of a material event — earnings releases, merger announcements, executive departures, or major asset sales. Because 8-Ks are filed before media coverage catches up, they are often the fastest way to get unfiltered information directly from the company on market-moving events.

Filed within two business days whenever an executive or director buys or sells company stock. Insider purchases — especially large or clustered buys — are often interpreted as a signal of management confidence. Insider selling is more ambiguous but worth monitoring for patterns, particularly around lock-up expirations or ahead of major announcements.


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This page (NASDAQ:UBFO) was last updated on 5/7/2026 by MarketBeat.com Staff.
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