COMMVAULT SYSTEMS INC — Director's Dealing 2010

Sep 17, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMVAULT SYSTEMS INC (CVLT)
CIK: 0001169561
Period of Report: 2010-09-15

Reporting Person: MICELI LOUIS (Vice President and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-09-15	Common Stock	F	235	$26.87	Disposed	90720	Direct
2010-09-15	Common Stock	M	75000	$6.00	Acquired	165720	Direct
2010-09-15	Common Stock	S	75000	$26.31	Disposed	90720	Direct
2010-09-17	Common Stock	M	15000	$7.20	Acquired	105720	Direct
2010-09-17	Common Stock	S	15000	$26.95	Disposed	90720	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-09-15	Options to Purchase Common Stock	$6.00	M	75000	Disposed	2012-05-02	Common Stock (75000)	Direct
2010-09-17	Options to Purchase Common Stock	$7.20	M	15000	Disposed	2014-01-29	Common Stock (15000)	Direct

Footnotes

F1: This sale of common stock was made to satisfy certain tax withholding obligations resulting from the vesting of restricted stock units.

F2: This transaction has taken place pursuant to a pre-arranged trading plan in compliance with Rule 10b5-1 of the Securities and Exchange Act of 1934.

F3: Represents average sale price.

F4: 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.