QUANTUM CORP /DE/ — Director's Dealing 2011

Jun 2, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: QUANTUM CORP /DE/ (QTM)
CIK: 0000709283
Period of Report: 2011-06-01

Reporting Person: HALL SHAWN D (Senior VP, GC & Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-06-01	Common Stock	F	5503	$3.03	Disposed	161526	Direct
2011-06-01	Common Stock	M	35000	$2.93	Acquired	196526	Direct
2011-06-01	Common Stock	S	35000	$3.0417	Disposed	161526	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-06-01	Non-Qualified Stock Options	$2.93	M	35000	Disposed	2011-07-01	Common Stock (35000)	Direct

Footnotes

F1: Surrender of shares to satisfy tax withholding obligations upon vesting of restricted stock units granted on 6/1/2009.

F2: Reflects the exercise of the stock options listed in Table II of this Form 4.

F3: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 3, 2010.