<SEC-DOCUMENT>0000902219-18-000324-index.html : 20180208
<SEC-HEADER>0000902219-18-000324.hdr.sgml : 20180208
<ACCEPTANCE-DATETIME>20180208120352
ACCESSION NUMBER:		0000902219-18-000324
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180208
DATE AS OF CHANGE:		20180208

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KEY TECHNOLOGY INC
		CENTRAL INDEX KEY:			0000906193
		STANDARD INDUSTRIAL CLASSIFICATION:	SPECIAL INDUSTRY MACHINERY (NO METALWORKING MACHINERY) [3550]
		IRS NUMBER:				930822509
		STATE OF INCORPORATION:			OR
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-48007
		FILM NUMBER:		18584174

	BUSINESS ADDRESS:	
		STREET 1:		150 AVERY ST
		CITY:			WALLA WALLA
		STATE:			WA
		ZIP:			99362
		BUSINESS PHONE:		5095292161

	MAIL ADDRESS:	
		STREET 1:		150 AVERY STREET
		CITY:			WALLA WALLA
		STATE:			WA
		ZIP:			99362

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WELLINGTON MANAGEMENT GROUP LLP
		CENTRAL INDEX KEY:			0000902219
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				042683227
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		C/O WELLINGTON MANAGEMENT COMPANY LLP
		STREET 2:		280 CONGRESS STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210
		BUSINESS PHONE:		6179515000

	MAIL ADDRESS:	
		STREET 1:		C/O WELLINGTON MANAGEMENT COMPANY LLP
		STREET 2:		280 CONGRESS STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02210

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WELLINGTON MANAGEMENT CO LLP
		DATE OF NAME CHANGE:	19960930

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WELLINGTON MANAGEMENT CO
		DATE OF NAME CHANGE:	19930426
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>SEC13G_Filing.htm
<DESCRIPTION>SEC SCHEDULE 13G
<TEXT>
Document 1 - file: SEC13G_Filing.htm

</DOCUMENT>
</SEC-DOCUMENT>