Quantum Corp (NYSE:QTM): Starboard Value LP Filed An Amended 13D

Jeff Smith’s Starboard filed an amended 13D regarding Quantum Corp (NYSE:QTM). 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	29,103,694	29,103,694	29,103,694	29,103,694	29,103,694	9.9%
STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD	18,069,036	29,103,694	18,069,036	29,103,694	18,069,036	6.3%
STARBOARD VALUE AND OPPORTUNITY S	3,809,394	29,103,694	3,809,394	29,103,694	3,809,394	1.4%
STARBOARD VALUE AND OPPORTUNITY C	1,265,467		1,265,467		1,265,467	Less than 1%
STARBOARD VALUE R	1,265,467		1,265,467		1,265,467	Less than 1%
STARBOARD VALUE R GP	1,265,467		1,265,467		1,265,467	Less than 1%
STARBOARD VALUE GP	29,103,694		29,103,694		29,103,694	9.9%
STARBOARD PRINCIPAL CO	29,103,694		29,103,694		29,103,694	9.9%
STARBOARD PRINCIPAL CO GP	29,103,694		29,103,694		29,103,694	9.9%
JEFFREY C. SMITH	137,565		137,565		29,241,259	9.99%
MARK R. MITCHELL					29,103,694	9.9%
PETER A. FELD					29,103,694	9.9%

Jeffrey Smith

Starboard Value LP

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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. 8)1

Quantum Corporation

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

747906204

(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)

December 5, 2016

(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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