<SEC-DOCUMENT>0001535264-15-000077-index.html : 20150806
<SEC-HEADER>0001535264-15-000077.hdr.sgml : 20150806
<ACCEPTANCE-DATETIME>20150806155038
ACCESSION NUMBER:		0001535264-15-000077
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20150806
DATE AS OF CHANGE:		20150806
GROUP MEMBERS:		ADAM C. STETTNER
GROUP MEMBERS:		AUSTIN W. MARXE
GROUP MEMBERS:		AWM INVESTMENT COMPANY, INC.
GROUP MEMBERS:		DAVID M. GREENHOUSE
GROUP MEMBERS:		MGP ADVISERS LIMITED PARTNERSHIP
GROUP MEMBERS:		SPECIAL SITUATIONS CAYMAN FUND, L.P.
GROUP MEMBERS:		SPECIAL SITUATIONS FUND III QP, L.P.
GROUP MEMBERS:		SSCAYMAN, LLC

SUBJECT COMPANY:	

	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:			1228

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-79796
		FILM NUMBER:		151032937

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AWM Investment Company, Inc.
		CENTRAL INDEX KEY:			0001535264
		IRS NUMBER:				113086452
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		527 MADISON AVENUE
		STREET 2:		SUITE 2600
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		212-319-6670

	MAIL ADDRESS:	
		STREET 1:		527 MADISON AVENUE
		STREET 2:		SUITE 2600
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>ultraclean13gat8.txt
<DESCRIPTION>ULTRACLEAN 13G/A
<TEXT>
Document 1 - file: ultraclean13gat8.txt

</DOCUMENT>
</SEC-DOCUMENT>