COMMVAULT SYSTEMS INC — Director's Dealing 2015

May 22, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: COMMVAULT SYSTEMS INC (CVLT)
CIK: 0001169561
Period of Report: 2015-05-20

Reporting Person: HAMMER N ROBERT (Director, Chairman, President & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-20	Common Stock	M	72065	$4.70	Acquired	2515847	Direct
2015-05-20	Common Stock	S	72065	$46.21	Disposed	2443782	Direct
2015-05-21	Common Stock	M	27935	$4.70	Acquired	2471717	Direct
2015-05-21	Common Stock	S	27935	$45.57	Disposed	2443782	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-05-20	Options to Purchase Common Stock	$4.70	M	72065	Disposed	2015-09-19	Common Stock (72065)	Direct
2015-05-21	Options to Purchase Common Stock	$4.70	M	27935	Disposed	2015-09-19	Common Stock (27935)	Direct

Footnotes

F1: Represents average sale price.

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.