<SEC-DOCUMENT>0000950138-17-000167-index.html : 20170214
<SEC-HEADER>0000950138-17-000167.hdr.sgml : 20170214
<ACCEPTANCE-DATETIME>20170214115610
ACCESSION NUMBER:		0000950138-17-000167
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20170214
DATE AS OF CHANGE:		20170214

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:			1230

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-79796
		FILM NUMBER:		17605330

	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:			AIT HOLDING CO LLC
		CENTRAL INDEX KEY:			0001346816
		IRS NUMBER:				000000000

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		245 PARK AVNEUE
		STREET 2:		20TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10167
		BUSINESS PHONE:		2125823015

	MAIL ADDRESS:	
		STREET 1:		245 PARK AVNEUE
		STREET 2:		20TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10167
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>ait13ga4_02132017.htm
<TEXT>
Document 1 - file: ait13ga4_02132017.htm

</DOCUMENT>
</SEC-DOCUMENT>