COMMVAULT SYSTEMS INC — Director's Dealing 2010

Nov 12, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMVAULT SYSTEMS INC (CVLT)
CIK: 0001169561
Period of Report: 2010-11-09

Reporting Person: CAROLAN BRIAN (VP Finance and CAO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-11-09	Common Stock	M	2500	$5.30	Acquired	18153	Direct
2010-11-09	Common Stock	S	2500	$31.00	Disposed	15653	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-11-09	Options to Purchase Common Stock	$5.30	M	2500	Disposed	2015-01-27	Common Stock (2500)	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: The options to purchase common stock are subject to a 4-year vesting schedule, as follows: 25% on the first anniversary of the grant with the remaining options vesting in equal quarterly installments thereafter.