<SEC-DOCUMENT>0000950103-18-006977-index.html : 20180601
<SEC-HEADER>0000950103-18-006977.hdr.sgml : 20180601
<ACCEPTANCE-DATETIME>20180601163741
ACCESSION NUMBER:		0000950103-18-006977
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180601
FILED AS OF DATE:		20180601
DATE AS OF CHANGE:		20180601

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MADDOCK ERNEST E
		CENTRAL INDEX KEY:			0001227050

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50646
		FILM NUMBER:		18875579

	MAIL ADDRESS:	
		STREET 1:		LAM RESEARCH
		STREET 2:		4650 CUSHING PARKWAY
		CITY:			FREMONT
		STATE:			CA
		ZIP:			94538

	FORMER NAME:	
		FORMER CONFORMED NAME:	MADDOCK ERNIE
		DATE OF NAME CHANGE:	20030411

ISSUER:		

	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

	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>4
<SEQUENCE>1
<FILENAME>dp91307_4-maddock.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: dp91307_4-maddock.html

Document 1 - RAW XML: dp91307_4-maddock.xml

</DOCUMENT>
</SEC-DOCUMENT>