COMMVAULT SYSTEMS INC — Director's Dealing 2011

Jun 2, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMVAULT SYSTEMS INC (CVLT)
CIK: 0001169561
Period of Report: 2011-05-31

Reporting Person: West David R (VP, Mkt & Bus. Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-31	Common Stock	M	25000	$5.00	Acquired	55795	Direct
2011-05-31	Common Stock	S	25000	$41.08	Disposed	30795	Direct
2011-05-31	Common Stock	M	2500	$4.00	Acquired	33295	Direct
2011-05-31	Common Stock	S	2500	$41.08	Disposed	30795	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-31	Options to Purchase Common Stock	$4.00	M	2500	Disposed	2013-01-30	Common Stock (2500)	Direct
2011-05-31	Options to Purchase Common Stock	$5.00	M	25000	Disposed	2013-11-07	Common Stock (25000)	Direct

Footnotes

F1: Represents average sale price.

F2: The options vested over 4 years from the date of grant, as follows: 25% on the first anniversary of the grant, quarterly thereafter for the remaining three years.