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

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Quantum Corp (NYSE:QTM): Jeffrey Smith’s Starboard Value LP filed an amended 13D.

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You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
STARBOARD VALUE 939,872 939,872 939,872 939,872 2.7%
STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD 534,661 534,661 939,872 534,661 1.5%
STARBOARD VALUE AND OPPORTUNITY S 119,844 119,844 939,872 119,844 Less than 1%
STARBOARD VALUE AND OPPORTUNITY C 97,846 97,846 97,846 Less than 1%
STARBOARD VALUE R 97,846 97,846 97,846 Less than 1%
STARBOARD VALUE R GP 97,846 97,846 97,846 Less than 1%
STARBOARD VALUE GP 939,872 939,872 939,872 2.7%
STARBOARD PRINCIPAL CO 939,872 939,872 939,872 2.7%
STARBOARD PRINCIPAL CO GP 939,872 939,872 939,872 2.7%
JEFFREY C. SMITH 17,195 17,195 957,067 2.8%
MARK R. MITCHELL 939,872 2.7%
PETER A. FELD 939,872 2.7%

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Page 1 of 20 – SEC Filing

UNITED STATES

SECURITIES AND EXCHANGE
COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED
IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(a)
AND AMENDMENTS THERETO FILED PURSUANT TO

§ 240.13d-2(a)

(Amendment No.  9)1

Quantum Corporation

(Name
of Issuer)

Common Stock,
par value $0.01 per share

(Title of Class of Securities)

747906501

(CUSIP Number)

JEFFREY
C. SMITH

STARBOARD
VALUE LP

777 Third Avenue, 18th Floor

New York, New York 10017

(212) 845-7977

STEVE
WOLOSKY, ESQ.

OLSHAN
FROME WOLOSKY LLP

1325
Avenue of the Americas

New
York, New York 10019

(212)
451-2300

(Name, Address and Telephone Number of Person

Authorized to Receive Notices
and Communications)

November 15, 2017

(Date of Event Which Requires
Filing of This Statement)

If
the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule
13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following
box
¨.

Note:  Schedules
filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.  See
§ 240.13d-7 for other parties to whom copies are to be sent.

1
The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to
the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided
in a prior cover page.

The information required
on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities
Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject
to all other provisions of the Act (however, see the Notes).

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