<SEC-DOCUMENT>0001193125-19-287054-index.html : 20191107
<SEC-HEADER>0001193125-19-287054.hdr.sgml : 20191107
<ACCEPTANCE-DATETIME>20191107134003
ACCESSION NUMBER:		0001193125-19-287054
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20191107
DATE AS OF CHANGE:		20191107
EFFECTIVENESS DATE:		20191107

FILER:

	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

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13449
		FILM NUMBER:		191199622

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d813186ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: d813186ddefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g8131861.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g8131861.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g8131862.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g8131862.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g813186g33t86.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g813186g33t86.jpg

</DOCUMENT>
</SEC-DOCUMENT>