Commvault : 2020 Annual Meeting Proxy Card

Using a black ink pen, mark your votes with an X as shown in this example.

Please do not write outside the designated areas.

Your vote matters - here's how to vote!

You may vote online or by phone instead of mailing this card.

Votes submitted electronically must be received by 3:00 a.m., ET, on August 27, 2020.

Online

Go to www.investorvote.com/CVLT or scan the QR code - login details are located in the shaded bar below.

Phone

Call toll free 1-800-652-VOTE (8683) within the USA, US territories and Canada

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2020 Annual Meeting Proxy Card

q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q

• Proposals - THEBOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" THEELECTION OF DIRECTORS AND "FOR" PROPOSALS 2, 3, 4 AND 5.

1. Election of Directors:								+
For	Against Abstain		For	Against Abstain	For	Against	Abstain
01 - R. Todd Bradley	02 - Charles Moran		03 - Allison Pickens
04 - Arlen Shenkman
	For	Against Abstain				For	Against	Abstain
2. Approve amendments to the Company's articles of incorporation		3. Ratify the appointment of Ernst & Young as independent public
to de-classify the Board of Directors.				accountants for the fiscal year ending March 31, 2021.

4. Approve amendment providing additional shares for grant under Company's Omnibus Incentive Plan.

6. In the discretion of the Proxies named herein, the Proxies are authorized to vote upon such other matters as may properly come before the meeting (or any adjournment or postponement thereof).

5. Approve, by non-binding vote, the Company's executive compensation.

• Authorized Signatures - This section must be completed for your vote to count. Please date and sign below.

Note: Please sign exactly as your name or names appear on this proxy. When shares are held jointly, each holder should sign. When signing as executor, administrator, attorney, trustee or guardian, please give full title as such. If the signer is a corporation, please sign full corporate name by a duly authorized officer, giving full title as such. If signer is a partnership, please sign in partnership name by an authorized person.

Date (mm/dd/yyyy) - Please print date below.	Signature 1 - Please keep signature within the box.		Signature 2 - Please keep signature within the box.

	4 4 B M	+

03A99C

The 2020 Annual Meeting of Stockholders of Commvault Systems, Inc. will be held on

Thursday, August 27, 2020 at 9:00 a.m. Eastern Time virtually via the internet at http://ir.commvault.com/annual-meeting.

To vote during the virtual meeting, you must verify your identity as a stockholder.

Please have the information that is printed on the shaded bar located on the reverse side of this form available.

Important notice regarding the Internet availability of proxy materials for the Annual Meeting of Stockholders.

The material is available at: www.investorvote.com/CVLT

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q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q

REVOCABLE PROXY - COMMVAULT SYSTEMS, INC.	+
Annual Meeting of Stockholders
August 27, 2020
Proxy Solicited by Board of Directors

The undersigned does hereby appoint Sanjay Mirchandani, Brian Carolan and Warren H. Mondschein, and each of them, with full power of substitution, as Proxies to vote, as directed on this card, or, if not so directed, in accordance with the Board of Directors' recommendations, all shares of Commvault Systems, Inc. held of record by the undersigned at the close of business on July 6, 2020 and entitled to vote at the Annual Meeting of Stockholders of Commvault Systems, Inc. to be held at 9:00 a.m., Eastern time, Thursday, August 27, 2020 virtually via the internet at http://ir.commvault.com/annual-meeting or at any adjournment or postponement thereof, and to vote, in their discretion, upon such other matters as may properly come before the Annual Meeting.

You are encouraged to specify your choices by marking the appropriate boxes, but you need not mark any boxes if you wish to vote in accordance with the Board of Directors' recommendations. The Proxies cannot vote your shares unless you sign and return this card.

THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED HEREIN. IF NO DIRECTION IS MADE, THIS PROXY WILL BE VOTED FOR THE ELECTION OF ALL NOMINEES UNDER PROPOSAL 1 AND FOR PROPOSALS 2, 3, 4 AND 5.

PLEASE PROVIDE YOUR INSTRUCTIONS TO VOTE BY TELEPHONE OR THE INTERNET OR

COMPLETE, DATE, SIGN, AND MAIL THIS PROXY CARD PROMPTLY

IN THE ENCLOSED POSTAGE-PAID ENVELOPE.

(Continued, and to be marked, dated and signed, on the other side)

• Non-VotingItems

Change of Address - Please print new address below.		Comments - Please print your comments below.

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