<SEC-DOCUMENT>0001193125-21-131001-index.html : 20210426
<SEC-HEADER>0001193125-21-131001.hdr.sgml : 20210426
<ACCEPTANCE-DATETIME>20210426123529
ACCESSION NUMBER:		0001193125-21-131001
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		6
CONFORMED PERIOD OF REPORT:	20210520
FILED AS OF DATE:		20210426
DATE AS OF CHANGE:		20210426

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ultra Clean Holdings, Inc.
		CENTRAL INDEX KEY:			0001275014
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				611430858
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1225

	FILING VALUES:
		FORM TYPE:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50646
		FILM NUMBER:		21852911

	BUSINESS ADDRESS:	
		STREET 1:		26462 CORPORATE AVENUE
		CITY:			HAYWARD
		STATE:			CA
		ZIP:			94545
		BUSINESS PHONE:		(510) 576-4400

	MAIL ADDRESS:	
		STREET 1:		26462 CORPORATE AVENUE
		CITY:			HAYWARD
		STATE:			CA
		ZIP:			94545

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ULTRA CLEAN HOLDINGS INC
		DATE OF NAME CHANGE:	20031231
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEF 14A
<SEQUENCE>1
<FILENAME>d21414ddef14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: d21414ddef14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g21414g17p26.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g21414g17p26.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g21414g27v64.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g21414g27v64.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g21414g71q46.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g21414g71q46.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g21414pc1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g21414pc1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g21414pc2.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g21414pc2.jpg

</DOCUMENT>
</SEC-DOCUMENT>