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Feb 6, 2017 09:08AM Form SC 13D/A QUANTUM CORP /DE/ Filed by: VIEX Capital Advisors, LLC
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Apr 6, 2016 05:18PM Form SC 13D/A QUANTUM CORP /DE/ Filed by: Starboard Value LP
Feb 2, 2016 09:01AM
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May 7, 2015 06:02AM Form SC 13D/A QUANTUM CORP /DE/ Filed by: Starboard Value LP
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