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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1169561	Commvault Systems Inc	CVLT	Services-Prepackaged Software (7372)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1279713	Louis Miceli	2 Crescent Place Oceanport NJ 07757	Vice President And Cfo	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2010-09-15	235	$26.87	90,720	No	4	F	Direct
Common Stock	Acquisiton	2010-09-15	75,000	$6.00	165,720	No	4	M	Direct
Common Stock	Disposition	2010-09-15	75,000	$26.31	90,720	No	4	S	Direct
Common Stock	Acquisiton	2010-09-17	15,000	$7.20	105,720	No	4	M	Direct
Common Stock	Disposition	2010-09-17	15,000	$26.95	90,720	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	F	Direct
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Options to Purchase Common Stock	Disposition	2010-09-15	75,000	$6.00	75,000	$6.00
Common Stock	Options to Purchase Common Stock	Disposition	2010-09-17	15,000	$7.20	15,000	$7.20

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2012-05-02	No	4	M	Direct
0		2014-01-29	No	4	M	Direct

Footnotes

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