QUANTUM CORP /DE/ — Director's Dealing 2011

Apr 14, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: QUANTUM CORP /DE/ (QTM)
CIK: 0000709283
Period of Report: 2011-04-13

Reporting Person: BELLUZZO RICHARD (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-04-13	Common Stock	M	33600	$0.98	Acquired	1116387	Direct
2011-04-13	Common Stock	S	33600	$3.25	Disposed	1082787	Direct
2011-04-14	Common Stock	M	56400	$0.98	Acquired	1139187	Direct
2011-04-14	Common Stock	M	300000	$2.97	Acquired	1439187	Direct
2011-04-14	Common Stock	S	356400	$3.30	Disposed	1082787	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-04-13	Non-Qualified Stock Options	$0.98	M	33600	Disposed	2016-07-01	Common Stock (33600)	Direct
2011-04-14	Non-Qualified Stock Options	$0.98	M	56400	Disposed	2016-07-01	Common Stock (56400)	Direct
2011-04-14	Non-Qualified Stock Options	$2.97	M	300000	Disposed	2012-09-03	Common Stock (300000)	Direct

Footnotes

F1: Reflects the exercise of the stock options listed in Table II of this Form 4.

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 24, 2010.

F3: The options are fully vested and immediately exercisable.