13D Filing: Starboard Value LP and Quantum Corp (QTM)

Item 6 is hereby
amended to add the following:

As previously
reported in the Schedule 13D and amendments thereto, the Reporting Persons purchased an aggregate of $35,550,000 principal
amount of 4.50% percent convertible senior notes due November 2017 (the “Notes”). The Notes were convertible at
the Reporting Persons’ option at any time prior to the close of business on the business day immediately preceding
November 15, 2017. The Reporting Persons did not convert the Notes prior to the maturity date and accordingly, as of November
15, 2017, the Notes matured and the Reporting Persons no longer beneficially own the Shares underlying the Notes.