COMMVAULT SYSTEMS INC — Director's Dealing 2011

May 18, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMVAULT SYSTEMS INC (CVLT)
CIK: 0001169561
Period of Report: 2011-05-16

Reporting Person: Rose Steven (Vice President, EMEA)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-16	Common Stock	M	39660	$16.99	Acquired	58725	Direct
2011-05-16	Common Stock	M	30000	$13.81	Acquired	88725	Direct
2011-05-16	Common Stock	S	39660	$38.13	Disposed	49065	Direct
2011-05-16	Common Stock	S	30000	$38.13	Disposed	19065	Direct
2011-05-16	Common Stock	S	1599	$38.55	Disposed	17466	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-16	Options to Purchase Common Stock	$16.99	M	39660	Disposed	2017-05-22	Common Stock (39660)	Direct
2011-05-16	Options to Purchase Common Stock	$13.81	M	30000	Disposed	2018-03-14	Common Stock (30000)	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.