<SEC-DOCUMENT>0001193125-18-004468-index.html : 20180105
<SEC-HEADER>0001193125-18-004468.hdr.sgml : 20180105
<ACCEPTANCE-DATETIME>20180105162006
ACCESSION NUMBER:		0001193125-18-004468
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20180105
DATE AS OF CHANGE:		20180105
EFFECTIVENESS DATE:		20180105

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:			1230

	FILING VALUES:
		FORM TYPE:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-222436
		FILM NUMBER:		18513633

	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>S-3ASR
<SEQUENCE>1
<FILENAME>d514618ds3asr.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: d514618ds3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.3
<SEQUENCE>2
<FILENAME>d514618dex43.htm
<DESCRIPTION>EX-4.3
<TEXT>
Document 2 - file: d514618dex43.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>3
<FILENAME>d514618dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 3 - file: d514618dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-12.1
<SEQUENCE>4
<FILENAME>d514618dex121.htm
<DESCRIPTION>EX-12.1
<TEXT>
Document 4 - file: d514618dex121.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>5
<FILENAME>d514618dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 5 - file: d514618dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>6
<FILENAME>d514618dex232.htm
<DESCRIPTION>EX-23.2
<TEXT>
Document 6 - file: d514618dex232.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g514618g99x01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g514618g99x01.jpg

</DOCUMENT>
</SEC-DOCUMENT>