<SEC-DOCUMENT>0001137547-25-000130-index.html : 20251217
<SEC-HEADER>0001137547-25-000130.hdr.sgml : 20251217
<ACCEPTANCE-DATETIME>20251217084613
ACCESSION NUMBER:		0001137547-25-000130
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		59
CONFORMED PERIOD OF REPORT:	20251216
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20251217
DATE AS OF CHANGE:		20251217

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED SECURITY BANCSHARES
		CENTRAL INDEX KEY:			0001137547
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		ORGANIZATION NAME:           	02 Finance
		EIN:				912112732
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-32897
		FILM NUMBER:		251577349

	BUSINESS ADDRESS:	
		STREET 1:		2126 INYO STREET
		CITY:			FRESNO
		STATE:			CA
		ZIP:			93721
		BUSINESS PHONE:		5594906261

	MAIL ADDRESS:	
		STREET 1:		2126 INYO STREET
		CITY:			FRESNO
		STATE:			CA
		ZIP:			93721
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>ubfo-20251216.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: ubfo-20251216.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-2.1 <SEQUENCE>2 <FILENAME>projectutopia-agreementand.htm <DESCRIPTION>EX-2.1 <TEXT> Document 2 - file: projectutopia-agreementand.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-10.1 <SEQUENCE>3 <FILENAME>projectutopia-votingands.htm <DESCRIPTION>EX-10.1 <TEXT> Document 3 - file: projectutopia-votingands.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-10.2 <SEQUENCE>4 <FILENAME>projectutopia-acquirorvo.htm <DESCRIPTION>EX-10.2 <TEXT> Document 4 - file: projectutopia-acquirorvo.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.1 <SEQUENCE>5 <FILENAME>communitywestbancsharesand.htm <DESCRIPTION>EX-99.1 <TEXT> Document 5 - file: communitywestbancsharesand.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.2 <SEQUENCE>6 <FILENAME>projectutopiainvestorpre.htm <DESCRIPTION>EX-99.2 <TEXT> Document 6 - file: projectutopiainvestorpre.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.SCH <SEQUENCE>7 <FILENAME>ubfo-20251216.xsd <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT <TEXT> Document 7 - file: ubfo-20251216.xsd
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.LAB <SEQUENCE>8 <FILENAME>ubfo-20251216_lab.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT <TEXT> Document 8 - file: ubfo-20251216_lab.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.PRE <SEQUENCE>9 <FILENAME>ubfo-20251216_pre.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT <TEXT> Document 9 - file: ubfo-20251216_pre.xml
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>10 <FILENAME>image_0a.jpg <TEXT> Document 10 - file: image_0a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>11 <FILENAME>image_1a.jpg <TEXT> Document 11 - file: image_1a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>image_2a.jpg <TEXT> Document 12 - file: image_2a.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>13 <FILENAME>projectutopia-acquirorvo001.jpg <TEXT> Document 13 - file: projectutopia-acquirorvo001.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>14 <FILENAME>projectutopia-acquirorvo002.jpg <TEXT> Document 14 - file: projectutopia-acquirorvo002.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>15 <FILENAME>projectutopia-acquirorvo003.jpg <TEXT> Document 15 - file: projectutopia-acquirorvo003.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>16 <FILENAME>projectutopia-acquirorvo004.jpg <TEXT> Document 16 - file: projectutopia-acquirorvo004.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>17 <FILENAME>projectutopia-acquirorvo005.jpg <TEXT> Document 17 - file: projectutopia-acquirorvo005.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>18 <FILENAME>projectutopia-acquirorvo006.jpg <TEXT> Document 18 - file: projectutopia-acquirorvo006.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>19 <FILENAME>projectutopia-acquirorvo007.jpg <TEXT> Document 19 - file: projectutopia-acquirorvo007.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>20 <FILENAME>projectutopia-acquirorvo008.jpg <TEXT> Document 20 - file: projectutopia-acquirorvo008.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>21 <FILENAME>projectutopia-votingands001.jpg <TEXT> Document 21 - file: projectutopia-votingands001.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>22 <FILENAME>projectutopia-votingands002.jpg <TEXT> Document 22 - file: projectutopia-votingands002.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>23 <FILENAME>projectutopia-votingands003.jpg <TEXT> Document 23 - file: projectutopia-votingands003.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>24 <FILENAME>projectutopia-votingands004.jpg <TEXT> Document 24 - file: projectutopia-votingands004.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>25 <FILENAME>projectutopia-votingands005.jpg <TEXT> Document 25 - file: projectutopia-votingands005.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>26 <FILENAME>projectutopia-votingands006.jpg <TEXT> Document 26 - file: projectutopia-votingands006.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>27 <FILENAME>projectutopia-votingands007.jpg <TEXT> Document 27 - file: projectutopia-votingands007.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>28 <FILENAME>projectutopia-votingands008.jpg <TEXT> Document 28 - file: projectutopia-votingands008.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>29 <FILENAME>projectutopia-votingands009.jpg <TEXT> Document 29 - file: projectutopia-votingands009.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>30 <FILENAME>projectutopia-votingands010.jpg <TEXT> Document 30 - file: projectutopia-votingands010.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>31 <FILENAME>projectutopiainvestorpre001.jpg <TEXT> Document 31 - file: projectutopiainvestorpre001.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>32 <FILENAME>projectutopiainvestorpre002.jpg <TEXT> Document 32 - file: projectutopiainvestorpre002.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>33 <FILENAME>projectutopiainvestorpre003.jpg <TEXT> Document 33 - file: projectutopiainvestorpre003.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>34 <FILENAME>projectutopiainvestorpre004.jpg <TEXT> Document 34 - file: projectutopiainvestorpre004.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>35 <FILENAME>projectutopiainvestorpre005.jpg <TEXT> Document 35 - file: projectutopiainvestorpre005.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>36 <FILENAME>projectutopiainvestorpre006.jpg <TEXT> Document 36 - file: projectutopiainvestorpre006.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>37 <FILENAME>projectutopiainvestorpre007.jpg <TEXT> Document 37 - file: projectutopiainvestorpre007.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>38 <FILENAME>projectutopiainvestorpre008.jpg <TEXT> Document 38 - file: projectutopiainvestorpre008.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>39 <FILENAME>projectutopiainvestorpre009.jpg <TEXT> Document 39 - file: projectutopiainvestorpre009.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>40 <FILENAME>projectutopiainvestorpre010.jpg <TEXT> Document 40 - file: projectutopiainvestorpre010.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>41 <FILENAME>projectutopiainvestorpre011.jpg <TEXT> Document 41 - file: projectutopiainvestorpre011.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>42 <FILENAME>projectutopiainvestorpre012.jpg <TEXT> Document 42 - file: projectutopiainvestorpre012.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>43 <FILENAME>projectutopiainvestorpre013.jpg <TEXT> Document 43 - file: projectutopiainvestorpre013.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>44 <FILENAME>projectutopiainvestorpre014.jpg <TEXT> Document 44 - file: projectutopiainvestorpre014.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>45 <FILENAME>projectutopiainvestorpre015.jpg <TEXT> Document 45 - file: projectutopiainvestorpre015.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>46 <FILENAME>projectutopiainvestorpre016.jpg <TEXT> Document 46 - file: projectutopiainvestorpre016.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>47 <FILENAME>projectutopiainvestorpre017.jpg <TEXT> Document 47 - file: projectutopiainvestorpre017.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>48 <FILENAME>projectutopiainvestorpre018.jpg <TEXT> Document 48 - file: projectutopiainvestorpre018.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>49 <FILENAME>projectutopiainvestorpre019.jpg <TEXT> Document 49 - file: projectutopiainvestorpre019.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>50 <FILENAME>projectutopiainvestorpre020.jpg <TEXT> Document 50 - file: projectutopiainvestorpre020.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>51 <FILENAME>projectutopiainvestorpre021.jpg <TEXT> Document 51 - file: projectutopiainvestorpre021.jpg
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>53 <FILENAME>R1.htm <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 53 - file: R1.htm
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>54 <FILENAME>Show.js <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 54 - file: Show.js
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>55 <FILENAME>report.css <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 55 - file: report.css
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>57 <FILENAME>FilingSummary.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 57 - file: FilingSummary.html
Document 57 - RAW XML: FilingSummary.xml
</DOCUMENT> <DOCUMENT> <TYPE>JSON <SEQUENCE>59 <FILENAME>MetaLinks.json <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 59 - file: MetaLinks.json
</DOCUMENT> <DOCUMENT> <TYPE>ZIP <SEQUENCE>60 <FILENAME>0001137547-25-000130-xbrl.zip <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 60 - file: 0001137547-25-000130-xbrl.zip
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>61 <FILENAME>ubfo-20251216_htm.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 61 - file: ubfo-20251216_htm.html
Document 61 - RAW XML: ubfo-20251216_htm.xml
</DOCUMENT> </SEC-DOCUMENT>