<SEC-DOCUMENT>0001193125-18-311246-index.html : 20181030
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ACCESSION NUMBER:		0001193125-18-311246
CONFORMED SUBMISSION TYPE:	DFAN14A
PUBLIC DOCUMENT COUNT:		25
FILED AS OF DATE:		20181030
DATE AS OF CHANGE:		20181030
EFFECTIVENESS DATE:		20181030

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ELECTRO SCIENTIFIC INDUSTRIES INC
		CENTRAL INDEX KEY:			0000726514
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		IRS NUMBER:				930370304
		STATE OF INCORPORATION:			OR
		FISCAL YEAR END:			0328

	FILING VALUES:
		FORM TYPE:		DFAN14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-12853
		FILM NUMBER:		181145511

	BUSINESS ADDRESS:	
		STREET 1:		13900 NW SCIENCE PARK DR
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97229
		BUSINESS PHONE:		5036414141

	MAIL ADDRESS:	
		STREET 1:		13900 NW SCIENCE PARK DRIVE
		CITY:			PORTLAND
		STATE:			OR
		ZIP:			97229-5497

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MKS INSTRUMENTS INC
		CENTRAL INDEX KEY:			0001049502
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		IRS NUMBER:				042277512
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DFAN14A

	BUSINESS ADDRESS:	
		STREET 1:		2 TECH DRIVE
		STREET 2:		SUITE 201
		CITY:			ANDOVER
		STATE:			MA
		ZIP:			01810
		BUSINESS PHONE:		978-645-5500

	MAIL ADDRESS:	
		STREET 1:		2 TECH DRIVE
		STREET 2:		SUITE 201
		CITY:			ANDOVER
		STATE:			MA
		ZIP:			01810
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