COMMVAULT SYSTEMS INC — Director's Dealing 2011

Nov 3, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMVAULT SYSTEMS INC (CVLT)
CIK: 0001169561
Period of Report: 2011-11-01

Reporting Person: WALKER DAVID F (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-11-01	Common Stock	M	652	$17.60	Acquired	16319	Direct
2011-11-01	Common Stock	S	652	$45.00	Disposed	15667	Direct
2011-11-02	Common Stock	M	6848	$17.60	Acquired	22515	Direct
2011-11-02	Common Stock	S	6848	$45.01	Disposed	15667	Direct
2011-11-02	Common Stock	M	1250	$19.25	Acquired	16917	Direct
2011-11-02	Common Stock	S	1250	$45.01	Disposed	15667	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-11-01	Options to Purchase Common Stock	$17.60	M	652	Disposed	2017-06-14	Common Stock (652)	Direct
2011-11-02	Options to Purchase Common Stock	$17.60	M	6848	Disposed	2017-06-14	Common Stock (6848)	Direct
2011-11-02	Options to Purchase Common Stock	$19.25	M	1250	Disposed	2019-08-14	Common Stock (1250)	Direct

Footnotes

F1: All transactions shown on this form have taken place pursuant to a pre-arranged trading plan in compliance with Rule 10b5-1 of the Securities and Exchange Act of 1934.

F2: Represents average sale price.

F3: 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.

F4: The options to purchase common stock vested 100% on the first anniversary of the grant.