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Form 4 - Statement of changes in beneficial ownership of securities:
SEC Accession No. 0000921895-16-003087
Filing Date
2016-01-26
Accepted
2016-01-26 20:26:54
Documents
1
Period of Report
2016-01-22

Document Format Files

Seq Description Document Type Size
1 OWNERSHIP DOCUMENT form406297109a_01262016.html 4  
1 OWNERSHIP DOCUMENT form406297109a_01262016.xml 4 29805
  Complete submission text file 0000921895-16-003087.txt   35617
Mailing Address 224 AIRPORT PARKWAY SUITE 300 SAN JOSE CA 95110
Business Address 224 AIRPORT PARKWAY SUITE 300 SAN JOSE CA 95110 408 944 4000
QUANTUM CORP /DE/ (Issuer) CIK: 0000709283 (see all company filings)

IRS No.: 942665054 | State of Incorp.: DE | Fiscal Year End: 0331
SIC: 3572 Computer Storage Devices

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 212-845-7906
STARBOARD VALUE & OPPORTUNITY MASTER FUND LTD (Reporting) CIK: 0001373638 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362857

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 (212) 845-7977
Starboard Value LP (Reporting) CIK: 0001517137 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362862

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 (212) 845-7977
Starboard Value GP LLC (Reporting) CIK: 0001517138 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362861

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 (212) 845-7977
Starboard Principal Co LP (Reporting) CIK: 0001517139 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362859

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 (212) 845-7977
Starboard Principal Co GP LLC (Reporting) CIK: 0001517140 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362858

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 212-845-7977
STARBOARD VALUE & OPPORTUNITY S LLC (Reporting) CIK: 0001519812 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362860

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 (212) 845-7977
Starboard Value & Opportunity C LP (Reporting) CIK: 0001571704 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362856

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 (212)845-7977
Starboard Value R LP (Reporting) CIK: 0001575972 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362855

Mailing Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017
Business Address 777 THIRD AVENUE, 18TH FLOOR NEW YORK NY 10017 (212) 845-7977
Starboard Value R GP LLC (Reporting) CIK: 0001575979 (see all company filings)

Type: 4 | Act: 34 | File No.: 001-13449 | Film No.: 161362854