COMMVAULT SYSTEMS INC — Director's Dealing 2010

Feb 22, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMVAULT SYSTEMS INC (CVLT)
CIK: 0001169561
Period of Report: 2010-02-18

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-02-18	Common Stock	M	30000	$5.00	Acquired	57880	Direct
2010-02-18	Common Stock	S	30000	$22.56	Disposed	27880	Direct
2010-02-22	Common Stock	M	10300	$5.00	Acquired	38180	Direct
2010-02-22	Common Stock	S	10300	$22.75	Disposed	27880	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-02-18	Options to Purchase Common Stock	$5.00	M	30000	Disposed	2010-07-25	Common Stock (30000)	Direct
2010-02-22	Options to Purchase Common Stock	$5.00	M	10300	Disposed	2010-07-25	Common Stock (10300)	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.