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

(b)

1. Sole power to vote or direct vote: 0 2. Shared power to vote or direct vote: 939,872 3. Sole power to dispose or direct the disposition: 0 4. Shared power to dispose or direct the disposition: 939,872

(c)

None of Messrs. Mitchell or Feld has entered into any transactions in the Shares during the past sixty days. Other than the Notes having matured (as defined and described in Item 6 below), each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and Starboard Value LP through the Starboard Value LP Account have not transacted in the Shares during the past sixty days.

K.

Mr. Smith*

(a)

As of the close of business on November 15, 2017, Mr. Smith beneficially owned 17,195 Shares representing RSUs that have vested. Mr. Smith, as a member of Principal GP and as a member of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed the beneficial owner of the (i) 534,661 Shares owned by Starboard V&O Fund, (ii) 119,844 Shares owned by Starboard S LLC, (iii) 97,846 Shares owned by Starboard C LP and (iv) 187,521 Shares held in the Starboard Value LP Account.

Percentage: Approximately 2.8%

(b)

1. Sole power to vote or direct vote: 17,195 2. Shared power to vote or direct vote: 939,872 3. Sole power to dispose or direct the disposition: 17,195 4. Shared power to dispose or direct the disposition: 939,872

(c)

Mr. Smith has not entered into any transactions in the Shares during the past sixty days. Other than the Notes having matured (as defined and described in Item 6 below), each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and Starboard Value LP through the Starboard Value LP Account have not transacted in the Shares during the past sixty days.

Each Reporting Person,
as a member of a “group” with the other Reporting Persons for the purposes of Section 13(d)(3) of the Securities Exchange
Act of 1934, as amended, may be deemed the beneficial owner of the Shares directly owned by the other Reporting Persons. Each Reporting
Person disclaims beneficial ownership of such Shares except to the extent of his or its pecuniary interest therein.

(d)

No person other than the Reporting Persons is known to have the right to receive, or the power to direct the receipt of dividends from, or proceeds from the sale of, the Shares.

(e)

As of November 15, 2017, the Reporting Persons ceased to beneficially own more than 5% of the outstanding Shares of the Issuer.

____________________

* See Mr. Smith’s cover page to this Amendment No. 9 for
details regarding his ownership of RSUs of the Issuer that have vested.