QUANTUM CORP /DE/ — Director's Dealing 2011

Apr 8, 2011

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: QUANTUM CORP /DE/ (QTM)
CIK: 0000709283
Period of Report: 2011-04-01

Reporting Person: Lee Janae S. (SVP Software and Disk Products)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	141821	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Non-Qualified Stock Option	$0.98	2016-07-01	Common Stock (250000)		Direct
Non-Qualified Stock Option	$4.00	2014-10-31	Common Stock (200000)		Direct

Footnotes

F1: Includes 97,500 restricted stock units which will vest as follows: 12,500 will vest on 6/1/11, 28,334 will vest on 7/1/11, and 28,333 will vest on each of 7/1/12 and 7/1/13.

F2: Right to buy under Rule 16b(3) Plan.

F3: Includes 187,500 stock options that are unvested and will vest as follows: 125,000 will vest on 7/1/2011 and 62,500 will vest on 7/1/2012.

F4: Includes 29,167 stock options that are unvested and will vest monthly at the rate of 1/48 of the original grant amount of 200,000 through 11/1/2011.