<SEC-DOCUMENT>0000921895-19-002984-index.html : 20191212
<SEC-HEADER>0000921895-19-002984.hdr.sgml : 20191212
<ACCEPTANCE-DATETIME>20191212200430
ACCESSION NUMBER:		0000921895-19-002984
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20191210
FILED AS OF DATE:		20191212
DATE AS OF CHANGE:		20191212

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Singer Eric
		CENTRAL INDEX KEY:			0001443284

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13449
		FILM NUMBER:		191283056

	MAIL ADDRESS:	
		STREET 1:		825 THIRD AVENUE
		STREET 2:		33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VIEX Opportunities Fund, LP Series One
		CENTRAL INDEX KEY:			0001606750
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13449
		FILM NUMBER:		191283057

	BUSINESS ADDRESS:	
		STREET 1:		C/O VIEX CAPITAL ADVISORS, LLC
		STREET 2:		825 THIRD AVENUE, 33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		212-752-5750

	MAIL ADDRESS:	
		STREET 1:		C/O VIEX CAPITAL ADVISORS, LLC
		STREET 2:		825 THIRD AVENUE, 33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER NAME:	
		FORMER CONFORMED NAME:	VIEX Opportunities Fund, LP
		DATE OF NAME CHANGE:	20151228

	FORMER NAME:	
		FORMER CONFORMED NAME:	Vertex Opportunities Fund, LP
		DATE OF NAME CHANGE:	20140429

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VIEX Opportunities Fund, LP - Series Two
		CENTRAL INDEX KEY:			0001659404
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13449
		FILM NUMBER:		191283058

	BUSINESS ADDRESS:	
		STREET 1:		C/O VIEX CAPITAL ADVISORS, LLC
		STREET 2:		825 THIRD AVENUE, 33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		212-752-5750

	MAIL ADDRESS:	
		STREET 1:		C/O VIEX CAPITAL ADVISORS, LLC
		STREET 2:		825 THIRD AVENUE, 33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER NAME:	
		FORMER CONFORMED NAME:	VIEX Opportunities Fund, LP Series Two
		DATE OF NAME CHANGE:	20151228

	FORMER NAME:	
		FORMER CONFORMED NAME:	Vertex Opportunities Fund, LP Series Two
		DATE OF NAME CHANGE:	20151125

	FORMER NAME:	
		FORMER CONFORMED NAME:	Vertex Opportuniteis Fund, LP Series Two
		DATE OF NAME CHANGE:	20151125

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VIEX Special Opportunities Fund III, LP
		CENTRAL INDEX KEY:			0001619126
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13449
		FILM NUMBER:		191283059

	BUSINESS ADDRESS:	
		STREET 1:		C/O VIEX CAPITAL ADVISORS, LLC
		STREET 2:		825 THIRD AVENUE, 33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		212-752-5750

	MAIL ADDRESS:	
		STREET 1:		C/O VIEX CAPITAL ADVISORS, LLC
		STREET 2:		825 THIRD AVENUE, 33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER NAME:	
		FORMER CONFORMED NAME:	Vertex Special Opportunities Fund III, LP
		DATE OF NAME CHANGE:	20140910

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VIEX GP, LLC
		CENTRAL INDEX KEY:			0001654852
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13449
		FILM NUMBER:		191283060

	BUSINESS ADDRESS:	
		STREET 1:		825 THIRD AVE.
		STREET 2:		33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		212-752-5750

	MAIL ADDRESS:	
		STREET 1:		825 THIRD AVE.
		STREET 2:		33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

	FORMER NAME:	
		FORMER CONFORMED NAME:	Vertex GP, LLC
		DATE OF NAME CHANGE:	20151005

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VIEX Special Opportunities GP III, LLC
		CENTRAL INDEX KEY:			0001676049
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13449
		FILM NUMBER:		191283061

	BUSINESS ADDRESS:	
		STREET 1:		825 THIRD AVE, 33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		(212) 451-2282

	MAIL ADDRESS:	
		STREET 1:		825 THIRD AVE, 33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VIEX Capital Advisors, LLC
		CENTRAL INDEX KEY:			0001619125
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13449
		FILM NUMBER:		191283062

	BUSINESS ADDRESS:	
		STREET 1:		745 BOYLSTON STREET
		STREET 2:		3RD FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		212-752-5750

	MAIL ADDRESS:	
		STREET 1:		745 BOYLSTON STREET
		STREET 2:		3RD FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER NAME:	
		FORMER CONFORMED NAME:	Vertex Capital Advisors, LLC
		DATE OF NAME CHANGE:	20140910

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			QUANTUM CORP /DE/
		CENTRAL INDEX KEY:			0000709283
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER STORAGE DEVICES [3572]
		IRS NUMBER:				942665054
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		224 AIRPORT PARKWAY
		STREET 2:		SUITE 550
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110
		BUSINESS PHONE:		408 944 4000

	MAIL ADDRESS:	
		STREET 1:		224 AIRPORT PARKWAY
		STREET 2:		SUITE 550
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110
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