<SEC-DOCUMENT>0001169561-25-000091.txt : 20251029
<SEC-HEADER>0001169561-25-000091.hdr.sgml : 20251029
<ACCEPTANCE-DATETIME>20251029145547
ACCESSION NUMBER:		0001169561-25-000091
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		16
FILED AS OF DATE:		20251029
DATE AS OF CHANGE:		20251029
EFFECTIVENESS DATE:		20251029

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COMMVAULT SYSTEMS INC
		CENTRAL INDEX KEY:			0001169561
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		ORGANIZATION NAME:           	06 Technology
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-291139
		FILM NUMBER:		251429536

	BUSINESS ADDRESS:	
		STREET 1:		1 COMMVAULT WAY
		CITY:			TINTON FALLS
		STATE:			NJ
		ZIP:			07724
		BUSINESS PHONE:		732-870-4000

	MAIL ADDRESS:	
		STREET 1:		1 COMMVAULT WAY
		CITY:			TINTON FALLS
		STATE:			NJ
		ZIP:			07724
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>a20251029s-8registrationst.htm
<DESCRIPTION>S-8
<TEXT>
<html><head>
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<title>Document</title></head><body><div id="ie1e0946cee8144f9b9f368e33f6ca7e6_42"></div><div style="min-height:12.24pt;width:100%"><div><font><br></font></div></div><div style="text-align:center"><font><br></font></div><div style="-sec-extract:summary;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">As filed with the Securities and Exchange Commission on October 29, 2025<br></font></div><div style="text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Registration No.&#160;333 -</font></div><div><font><br></font></div><div><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:18pt;font-weight:700;line-height:120%">UNITED STATES</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"><br></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:18pt;font-weight:700;line-height:120%">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:120%">Washington, D.C. 20549 </font></div><div><font><br></font></div><div><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:18pt;font-weight:700;line-height:120%">FORM S-8</font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:120%">REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933</font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:24pt;font-weight:700;line-height:120%">COMMVAULT SYSTEMS, INC.</font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(Exact Name of Registrant as Specified in its Charter)</font></div><div style="text-align:center"><font><br></font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:0.1%"></td><td style="width:0.553%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:44.833%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.402%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.553%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:3.116%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.402%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.553%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:44.683%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.405%"></td><td style="width:0.1%"></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Delaware</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">22-3447504</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(State or Other Jurisdiction</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">(I.R.S. Employer Identification No.)</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">of Incorporation or Organization)</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td></tr></table></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">1 Commvault Way, Tinton Falls, New Jersey 07724</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"><br>(Address of Principal Executive Offices)</font></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">COMMVAULT SYSTEMS, INC. 2016 OMNIBUS INCENTIVE PLAN</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"><br>(Full Title of the Plan)</font></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Sanjay Mirchandani<br>President and Chief Executive Officer<br>Commvault Systems, Inc.<br>1 Commvault Way, Tinton Falls, New Jersey 07724<br>(732)&#160;870-4000</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"><br></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:400;line-height:120%">(Name, Address and Phone Number of Agent for Service)</font></div><div style="text-align:center"><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:400;line-height:120%">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer,&#8221; &#8220;smaller reporting company,&#8221; and &#8220;emerging growth company&#8221; in Rule 12b-2 of the Securities Exchange Act of 1934.<br></font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:0.1%"></td><td style="width:0.577%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:22.228%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.422%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.422%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.733%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.422%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.577%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:34.980%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.422%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.577%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.821%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.422%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.577%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:26.893%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.422%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.422%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.733%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.422%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.428%"></td><td style="width:0.1%"></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:400;line-height:100%">Large&#160;accelerated&#160;filer</font></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:100%">&#9746;</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:400;line-height:100%">Accelerated filer </font></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:100%">&#9744;</font></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:400;line-height:100%">Non-accelerated filer</font></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:100%">&#9744;</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:400;line-height:100%">Smaller&#160;reporting&#160;company </font></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:100%">&#9744;</font></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:400;line-height:100%">Emerging growth company </font></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:100%">&#9744;</font></td><td colspan="3" style="padding:0 1pt"></td></tr></table></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:400;line-height:120%">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  </font><font style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:120%">&#9744;</font></div><div style="height:12.24pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><div id="ie1e0946cee8144f9b9f368e33f6ca7e6_70"></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div><div><font><br></font></div></div><div style="-sec-extract:summary;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">EXPLANATORY NOTE</font></div><div style="text-align:center"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">This Registration Statement on Form S-8 (this &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Registration Statement</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;) is being filed by Commvault Systems, Inc. (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Company</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221; or &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Registrant</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;) for the purpose of registering an additional 1,300,000 shares of the Company&#8217;s common stock, par value $0.01 per share (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Common Stock</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;), issuable under the Commvault Systems, Inc. 2016 Omnibus Incentive Plan, as amended (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Plan</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;). This Registration Statement relates solely to the registration of additional securities of the same class as other securities for which registration statements on Form S-8 relating to the employee benefit plan set forth herein are effective.</font></div><div style="text-indent:36pt"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">At the Company&#8217;s 2025 Annual Meeting of Stockholders held on August 7, 2025, the Company&#8217;s stockholders approved and authorized an additional 1,300,000 shares of Common Stock for issuance under the Plan.</font></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">PART I</font></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS</font></div><div style="text-align:center"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Information required by Part I of Form S-8 to be contained in the Section 10(a) prospectus is omitted from this Registration Statement in accordance with Rule 428 under the Securities Act of 1933, as amended (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Securities Act</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;). The documents containing the information specified in Part I will be delivered to the participants in the Plan as required by Rule 428(b) under the Securities Act and are not being filed with the Securities and Exchange Commission (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Commission</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;) as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to Rule 424 under the Securities Act. </font></div><div><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">PART II</font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"><br></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;3. Incorporation of Documents by Reference.</font></div><div><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following documents filed by the Company with the Commission are incorporated by reference in this Registration Statement&#58;</font></div><div style="text-indent:36pt"><font><br></font></div><div style="padding-left:54pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(1)&#160;&#160;&#160;&#160;The Company&#8217;s Annual Report on&#160;Form 10-K</font><font style="color:#0000ff;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">for the fiscal year ended March 31, 2025, filed with the Commission on </font><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956125000034/cvlt-20250331.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">May 5, 2025</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Annual Report</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;)&#59;</font></div><div style="padding-left:54pt"><font><br></font></div><div style="padding-left:54pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(2)&#160;&#160;&#160;&#160;The information specifically incorporated by reference into the Annual Report from the Company&#8217;s Definitive Proxy Statement on Schedule 14A for the 2025 Annual Meeting of Stockholders, filed with the Commission on </font><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956125000059/cvlt-20250625.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">June 25, 2025</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#59;</font></div><div style="text-indent:36pt"><font><br></font></div><div style="padding-left:54pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(3)&#160;&#160;&#160;&#160;The Company&#8217;s Quarterly Reports on Form 10-Q for the quarters ended&#160;June 30, 2025 and September 30, 2025, filed with the Commission on </font><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956125000069/cvlt-20250630.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">July 30, 2025</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> and </font><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956125000089/cvlt-20250930.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">October</a><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956125000089/cvlt-20250930.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"> 29, 2025</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">, respectively.</font></div><div style="text-indent:36pt"><font><br></font></div><div style="padding-left:54pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(4)&#160;&#160;&#160;&#160;All other reports filed with the Commission pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Exchange Act</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;) since the end of the fiscal year covered by the Annual Report (other than the portions of these documents not deemed to be filed)&#59; and</font></div><div style="text-indent:36pt"><font><br></font></div><div style="padding-left:54pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(5)&#160;&#160;&#160;&#160; The description of the Common Stock contained in the Company&#8217;s Registration Statement on Form 8-A&#47;A filed with the Commission on&#160;</font><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000095012306011755/y24537aae8va12bza.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">September 19, 2006</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#160;(Commission File No. 001-33026), as updated by </font><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956123000044/descriptionofsecurities2023.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Exhibit 4.2</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> to the Company&#8217;s Annual Report on Form 10-K for the fiscal year ended March 31, 2023, filed with the Commission on&#160;</font><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956123000044/cvlt-20230331.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">May 5, 2023</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">, together with any amendment or report filed for the purpose of updating such description.</font></div><div style="text-indent:36pt"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">All documents subsequently filed by the Company pursuant to Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act on or after the date of this Registration Statement and prior to the filing of a post-effective </font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div><div><font><br></font></div></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">amendment which indicates that all securities offered hereby have been sold or which deregisters all securities then remaining unsold shall be deemed to be incorporated by reference herein and to be a part hereof from the date of filing of such documents&#59;&#160;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">provided</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">,&#160;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">however</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">, that documents or information deemed to have been furnished and not filed in accordance with the rules of the Commission shall not be deemed incorporated by reference herein. Any statement contained herein or in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;4. Description of Securities.</font></div><div><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Not applicable. </font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;5. Interests of Names Experts and Counsel.</font></div><div><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Not applicable. </font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;6. Indemnification of Directors and Officers.</font></div><div><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Section 102(b)(7) of the Delaware General Corporation Law, as amended (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">DGCL</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;), permits a corporation to eliminate or limit the personal liability of directors or officers of a corporation to the corporation or its stockholders for monetary damages for a breach of fiduciary duty as a director or officer, except&#160;</font><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">for liability of (a) a director or officer for any breach of the director&#8217;s or officer&#8217;s duty of loyalty to the corporation or its stockholders, (b) a director or officer for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (c) a director for unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 of the DGCL, </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(d) </font><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">a director or officer for any transaction from which the director or officer derived an improper personal benefit, or (e) an officer in any action by or in the right of the corporation.</font></div><div style="text-indent:36pt"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Section 145 of the DGCL provides, among other things, that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, agent or employee of the corporation or is or was serving at the corporation&#8217;s request as a director, officer, agent or employee of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys&#8217; fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding. The power to indemnify applies (a) if such person is successful on the merits or otherwise in defense of any action, suit or proceeding or (b) if such person acted in good faith and in a manner such person reasonably believed to be in the best interests, or not opposed to the best interests, of the corporation, and with respect to any criminal action or proceeding, had no reasonable cause to believe such person&#8217;s conduct was unlawful. The power to indemnify applies to actions brought by or in the right of the corporation as well, but only to the extent of expenses (including attorneys&#8217; fees but excluding amounts paid in settlement) actually and reasonably incurred in the defense or settlement of such action and not to any satisfaction of judgment or settlement of the claim itself, and with the further limitation that in such actions no indemnification shall be made in the event of any adjudication of negligence or misconduct in the performance of duties to the corporation, unless the court believes that in light of all the circumstances indemnification should apply.</font></div><div style="text-indent:36pt"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Section 174 of the DGCL provides, among other things, that a director, who willfully or negligently approves of an unlawful payment of dividends or an unlawful stock purchase or redemption, shall be held liable for such actions. A director who was either absent when the unlawful actions were approved or dissented at the time, may avoid liability by causing his or her dissent to such actions to be entered on the books containing the minutes of the meetings of the board of directors at the time such actions occurred or immediately after such absent director receives notice of the unlawful acts.</font></div><div style="text-indent:36pt"><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div><div><font><br></font></div></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The Company&#8217;s certificate of incorporation (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Certificate</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;) exculpates the Company&#8217;s directors and officers from personal liability as permitted by DGCL Section 102(b)(7), described above. The Certificate and bylaws provide for indemnification of its directors and officers to the fullest extent permitted by the DGCL and require the Company to advance litigation expenses upon its receipt of an undertaking by or on behalf of a director or officer to repay such advances if it is ultimately determined that such director or officer is not entitled to indemnification. The indemnification provisions contained in the Company&#8217;s bylaws are not exclusive of any other rights to which a person may be entitled by law, agreement, vote of stockholders or disinterested directors or otherwise. The Company has obtained directors&#8217; and officers&#8217; liability insurance.</font></div><div style="text-indent:36pt"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In addition, the Company has entered into agreements to indemnify its directors and certain of its officers in addition to the indemnification provided for in the Certificate and bylaws. These agreements, among other things, indemnify the Company&#8217;s directors and some of its officers for certain expenses (including attorneys&#8217; fees), judgments, fines and settlement amounts incurred by such person in any action or proceeding, including any action by or in the Company&#8217;s right, on account of services by that person as a director or officer of the Company or as a director or officer of any of the Company&#8217;s subsidiaries, or as a director or officer of any other company or enterprise that the person provides services to at the Company&#8217;s request.</font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;7. Exemption from Registration Claimed.</font></div><div><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Not applicable. </font></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;8. Exhibits.</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:2.150%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:3.234%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.502%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:4.472%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:80.788%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:2.154%"></td><td style="width:0.1%"></td></tr><tr><td colspan="9" style="border-bottom:0.25pt solid #000000;padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Exhibit No.</font></td><td colspan="9" style="border-bottom:0.25pt solid #000000;padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Description</font></td></tr><tr><td colspan="9" style="border-top:0.25pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;padding-right:-1.63pt"><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956119000063/amendedandrestatedcert.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">4.1</a></font></div></td><td colspan="9" style="border-top:0.25pt solid #000000;padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amended and Restated Certificate of Incorporation of Commvault Systems, Inc. (Incorporated by reference to Exhibit&#160;3.1 to the Registrant&#8217;s Quarterly Report on Form 10-Q for the quarter ended September 30, 2019)</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;padding-right:-1.63pt"><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956120000043/certificateofincamendm.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">4.2</a></font></div></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Certificate of Amendment of Amended and Restated Certificate of Incorporation of Commvault Systems, Inc. (Incorporated by reference to Exhibit 3.1 to the Registrant&#8217;s Form 8-K dated August 28, 2020)</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;padding-right:-1.63pt"><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956123000145/a20230930ex31-certificateo.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">4.3</a></font></div></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Certificate of Amendment of Amended and Restated Certificate of Incorporation of Commvault Systems, Inc. (Incorporated by reference to Exhibit 3.1 to the Registrant&#8217;s Quarterly Report on Form 10-Q for the quarter ended September 30, 2023)</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;padding-right:-1.63pt"><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">4<a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956122000018/fourthamendedandrestatedby.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">.4</a></font></div></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Amended and Restated Bylaws of Commvault Systems, Inc. (Incorporated by reference to Exhibit 3.3 to the Registrant&#8217;s Annual Report on Form 10-K for the year ended March 31, 2022)</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;padding-right:-1.63pt"><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956121000041/omnibusincentiveplan-fifth.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">4.5</a></font></div></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Commvault Systems, Inc. 2016 Omnibus Incentive Plan (As amended through the Fifth Amendment thereof) (Incorporated by reference to Exhibit 10.1 to the Registrant&#8217;s Quarterly Report on Form 10-Q for the quarter ended September 30, 2021)  </font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;padding-right:-1.63pt"><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="https://www.sec.gov/Archives/edgar/data/1169561/000116956122000099/a20220930ex101-sixthamendm.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">4.6</a></font></div></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Sixth Amendment to Commvault Systems, Inc. 2016 Omnibus Incentive Plan (Incorporated by reference to Exhibit 10.1 to the Registrant&#8217;s Quarterly Report on Form 10-Q for the quarter ended September 30, 2022)</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;padding-right:-1.63pt"><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="a20251029-ex51opinionofkir.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">5.1*</a></font></div></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Opinion of Kirkland &#38; Ellis LLP</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="a20251029-ex231sx8consento.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">23.1*</a></font></div></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Consent of Ernst &#38; Young LLP</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">23.2*</font></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Consent of Kirkland &#38; Ellis LLP (contained in Exhibit 5.1 to this Registration Statement)</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">24.1*</font></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Power of Attorney (included on signature page hereto)</font></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;padding-right:-1.63pt"><font style="color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline"><a href="exfilingfees.htm" style="-sec-extract:exhibit;color:#3051f2;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%;text-decoration:underline">107.1*</a></font></div></td><td colspan="9" style="padding:2px 1pt 2px 2.12pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Filing Fee Table</font></td></tr></table></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">____________</font></div><div style="margin-bottom:8pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">* Filed herewith.</font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div><div><font><br></font></div></div><div><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item&#160;9. 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In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.</font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div><div><font><br></font></div></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">SIGNATURES</font></div><div style="text-align:center"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Tinton Falls, State of New Jersey, on October 29, 2025.</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:0.1%"></td><td style="width:0.572%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:46.195%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.418%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.572%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:2.454%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.418%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.572%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:2.763%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.418%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.572%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:38.621%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.425%"></td><td style="width:0.1%"></td></tr><tr><td colspan="9" style="padding:0 1pt"></td><td colspan="27" style="padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">COMMVAULT SYSTEMS, INC.</font></td></tr><tr><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">By&#58;</font></td><td colspan="18" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47; Sanjay Mirchandani</font></td></tr><tr><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="18" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Sanjay Mirchandani</font></td></tr><tr><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="18" style="padding:2px 1pt;text-align:left;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">President and Chief Executive Officer</font></td></tr></table></div><div style="text-align:center"><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints, jointly and severally, Sanjay Mirchandani, Jennifer DiRico, and Danielle Sheer as his or her attorneys-in-fact, each with the power of substitution, for him or her in any and all capacities, to sign any amendments to this Registration Statement on Form S-8 (including post-effective amendments), and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Commission, hereby ratifying and confirming all that each of said attorneys-in-fact, or his or her substitute or substitutes, may do or cause to be done by virtue hereof.</font></div><div><font><br></font></div><div><font><br></font></div><div style="text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed by the following persons in the capacities indicated on October 29, 2025.&#160;</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:98.076%"><tr><td style="width:0.1%"></td><td style="width:0.616%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:41.873%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.453%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.616%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:2.577%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.453%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.616%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:49.396%"></td><td style="width:0.1%"></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:100%;text-decoration:underline">Signature</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:8pt;font-weight:700;line-height:100%;text-decoration:underline">Title</font></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="15" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;Sanjay Mirchandani</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director, President &#38; Chief Executive Officer <br>(Principal Executive Officer)</font></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Sanjay Mirchandani</font></td><td colspan="15" style="padding:0 1pt"></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="15" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;Jennifer DiRico</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-right:-1.63pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Chief Financial Officer<br>(Principal Financial and Accounting Officer)</font></div></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Jennifer DiRico</font></td><td colspan="15" style="padding:0 1pt"></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="15" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;Nicola Adamo</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Chairman of the Board</font></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Nicola Adamo</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:0 1pt"></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="15" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;Martha H. Bejar</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Martha H. Bejar</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:0 1pt"></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;Keith Geeslin</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Keith Geeslin</font></td><td colspan="15" style="padding:0 1pt"></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:0 1pt"></td></tr></table></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div><div><font><br></font></div></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:98.076%"><tr><td style="width:0.1%"></td><td style="width:0.616%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:41.873%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.453%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.616%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:2.577%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.453%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.616%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:49.396%"></td><td style="width:0.1%"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;Geoff Haydon</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Geoff Haydon</font></td><td colspan="15" style="padding:0 1pt"></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="15" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;Vivie Lee</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Vivie Lee</font></td><td colspan="15" style="padding:0 1pt"></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="15" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;Charles E. Moran</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Charles E. Moran</font></td><td colspan="15" style="padding:0 1pt"></td></tr><tr style="height:14pt"><td colspan="9" style="padding:0 1pt"></td><td colspan="15" style="padding:0 1pt"></td></tr><tr><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47;&#160;&#160;&#160;&#160;A. Shane Sanders</font></td><td colspan="9" style="padding:0 1pt"></td><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td></tr><tr><td colspan="9" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">A. 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<TYPE>EX-FILING FEES
<SEQUENCE>2
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<title>exfilingfees</title></head><body><div style="display:none"><ix:header><ix:hidden><ix:nonNumeric contextRef="c-1" name="dei:EntityCentralIndexKey" id="f-1">0001169561</ix:nonNumeric><ix:nonNumeric contextRef="c-1" name="ffd:SubmissnTp" id="f-2">S-8</ix:nonNumeric><ix:nonNumeric contextRef="c-1" name="ffd:FeeExhibitTp" id="f-3">EX-FILING FEES</ix:nonNumeric><ix:nonNumeric contextRef="c-1" name="ffd:OffsetTableNa" id="f-4">N/A</ix:nonNumeric></ix:hidden><ix:references xml:lang="en-US"><link:schemaRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"/></ix:references><ix:resources><xbrli:unit id="shares"><xbrli:measure>xbrli:shares</xbrli:measure></xbrli:unit><xbrli:unit id="usd"><xbrli:measure>iso4217:USD</xbrli:measure></xbrli:unit><xbrli:unit id="number"><xbrli:measure>xbrli:pure</xbrli:measure></xbrli:unit><xbrli:context id="c-1"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0001169561</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2025-10-29</xbrli:startDate><xbrli:endDate>2025-10-29</xbrli:endDate></xbrli:period></xbrli:context><xbrli:context id="c-2"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0001169561</xbrli:identifier><xbrli:segment><xbrldi:typedMember dimension="ffd:OfferingAxis"><dei:lineNo>1</dei:lineNo></xbrldi:typedMember></xbrli:segment></xbrli:entity><xbrli:period><xbrli:startDate>2025-10-29</xbrli:startDate><xbrli:endDate>2025-10-29</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div><div id="i0d821a815fc94d008529fefc70382355_42"></div><div style="min-height:72pt;width:100%"><div style="text-align:right"><span><br/></span></div></div><div style="text-align:right"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Exhibit 107</span></div><div style="text-align:right"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Calculation of Filing Fee Tables</span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Form <ix:nonNumeric contextRef="c-1" name="ffd:FormTp" id="f-5">S-8</ix:nonNumeric></span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"><ix:nonNumeric contextRef="c-1" name="dei:EntityRegistrantName" id="f-6">Commvault Systems, Inc</ix:nonNumeric>. </span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span><br/></span></div><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Table 1: Newly Registered Securities</span></div><div style="text-align:center"><span><br/></span></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:96.412%"><tr><td style="width:0.1%"/><td style="width:1.720%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:8.143%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.400%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:10.424%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:8.023%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:9.224%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:7.543%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.880%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.745%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.400%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:7.183%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.280%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.880%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:8.755%"/><td style="width:0.1%"/></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Security Type</span></td><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Security Class Title</span></td><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Fee Calculation Rule</span></td><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-right:-1.38pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Amount Registered</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:6.5pt;font-weight:700;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">(1)</span></div></td><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Proposed Maximum Offering Price Per Unit</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:6.5pt;font-weight:700;line-height:100%;position:relative;top:-3.5pt;vertical-align:baseline">(2)</span></div></td><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Maximum Aggregate Offering Price</span><span style="color:#000000;font-family:'Times New Roman',serif;font-size:6.5pt;font-weight:700;line-height:100%;position:relative;top:-3.5pt;vertical-align:baseline">(2)</span></div></td><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Fee Rate</span></td><td colspan="9" style="padding:0 1pt"/><td colspan="6" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Amount of Registration Fee</span></td></tr><tr><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">1</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-2" name="ffd:PrevslyPdFlg" format="ixt:fixed-false" id="f-7"><ix:nonNumeric contextRef="c-2" name="ffd:OfferingSctyTp" id="f-8">Equity</ix:nonNumeric></ix:nonNumeric></span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonNumeric contextRef="c-2" name="ffd:OfferingSctyTitl" id="f-9">Common Stock, par value $0.01 per share</ix:nonNumeric></span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-right:-1.38pt;text-align:center"><span><br/></span></div><div style="padding-right:-1.38pt;text-align:center"><span><br/></span></div><div style="padding-right:-1.38pt;text-align:center"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"><ix:nonNumeric contextRef="c-2" name="ffd:FeesOthrRuleFlg" format="ixt:fixed-true" id="f-10">Other</ix:nonNumeric></span></div></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="shares" contextRef="c-2" decimals="0" name="ffd:AmtSctiesRegd" format="ixt:num-dot-decimal" id="f-11">1,300,000</ix:nonFraction></span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td colspan="4" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="c-2" decimals="2" name="ffd:MaxOfferingPricPerScty" id="f-12">172.80</ix:nonFraction>&#160;</span></td><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td colspan="4" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="c-2" decimals="2" name="ffd:MaxAggtOfferingPric" format="ixt:num-dot-decimal" id="f-13">224,640,000.00</ix:nonFraction>&#160;</span></td><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="number" contextRef="c-2" decimals="8" name="ffd:FeeRate" id="f-14">0.00013810</ix:nonFraction>&#160;</span></td><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="c-2" decimals="2" name="ffd:FeeAmt" format="ixt:num-dot-decimal" id="f-15">31,022.78</ix:nonFraction>&#160;</span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="60" style="padding:2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Total Offering Amounts:</span></td><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:1pt solid #000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td colspan="4" style="background-color:#ffffff;border-bottom:1pt solid #000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="c-1" decimals="2" name="ffd:TtlOfferingAmt" format="ixt:num-dot-decimal" id="f-16">224,640,000.00</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:1pt solid #000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="c-1" decimals="2" name="ffd:TtlFeeAmt" format="ixt:num-dot-decimal" id="f-17">31,022.78</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="60" style="padding:2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Total Fee Offsets:</span></td><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="9" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="9" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"/><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="c-1" decimals="2" name="ffd:TtlOffsetAmt" format="ixt:fixed-zero" id="f-18">&#8212;</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="60" style="background-color:#ffffff;padding:2px 1pt;text-align:right;vertical-align:middle"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Net Fee Due:</span></td><td colspan="9" style="background-color:#ffffff;padding:0 1pt"/><td colspan="9" style="background-color:#ffffff;padding:0 1pt"/><td colspan="9" style="background-color:#ffffff;padding:0 1pt"/><td colspan="9" style="background-color:#ffffff;padding:0 1pt"/><td colspan="9" style="background-color:#ffffff;padding:0 1pt"/><td colspan="9" style="background-color:#ffffff;padding:0 1pt"/><td colspan="9" style="background-color:#ffffff;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"><ix:nonFraction unitRef="usd" contextRef="c-1" decimals="2" name="ffd:NetFeeAmt" format="ixt:num-dot-decimal" id="f-19">31,022.78</ix:nonFraction>&#160;</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Offering Note</span></div><div><span><br/></span></div><ix:nonNumeric contextRef="c-2" name="ffd:OfferingNote" id="f-20" escape="true"><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:6.5pt;font-weight:400;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">(1)</span></div><div style="margin-bottom:3pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">This Registration Statement on Form S-8 registers offers and sales of 1,300,000 shares of common stock, par value $0.01 per share (&#8220;Common Stock&#8221;), of Commvault Systems, Inc. Pursuant to Rule 416(a), the number of shares being registered shall be adjusted to include any additional shares that may become issuable as a result of stock splits, stock dividends or similar transactions in accordance with the Commvault Systems, Inc. 2016 Omnibus Incentive Plan, as amended, and agreements evidencing awards granted thereunder.</span></div><div style="margin-bottom:3pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:6.5pt;font-weight:400;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">(2) </span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Estimated solely for the purpose of computing the registration fee pursuant to Rule 457(h) and Rule 457(c) under the Securities Act of 1933, as amended. The price per share of Common Stock is based on the average of the high and low prices reported for a share of Common Stock on the Nasdaq Stock Market on October 27, 2025.</span></div></ix:nonNumeric><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><span><br/></span></div></div></div></body></html>
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<TYPE>EX-5.1
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<DESCRIPTION>EX-5.1
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<title>Document</title></head><body><div id="i8cc617a20b1040429921fd34bf197913_1"></div><div style="background-color:#ffffff"><div style="min-height:181.08pt;width:100%"><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:37.286%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:22.127%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:37.287%"></td><td style="width:0.1%"></td></tr><tr><td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:7pt;margin-top:10pt;padding-left:2.77pt;padding-right:65.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Exhibit 5.1</font></div><div style="margin-bottom:7pt;margin-top:10pt;padding-left:2.77pt;padding-right:2.77pt;text-align:center"><img alt="image_1a.jpg" src="image_1a.jpg" style="height:23px;margin-bottom:5pt;vertical-align:text-bottom;width:238px"></div></td></tr><tr><td colspan="3" style="padding:0 1pt"><div style="margin-bottom:12pt;margin-top:32pt;padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font><br></font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-top:14pt;padding-right:-2.63pt;text-align:center"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:10.00pt">601 Lexington Avenue</font></div><div style="padding-right:-2.63pt;text-align:center"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:10.00pt">New York, NY 10022</font></div><div style="padding-right:-2.63pt;text-align:center"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:10.00pt">United States</font></div><div style="margin-top:8pt;padding-right:-2.63pt;text-align:center"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:10.00pt">+1 212 446 4800</font></div><div style="margin-bottom:10pt;margin-top:10pt;padding-right:-2.63pt;text-align:center"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:10.00pt">www.kirkland.com</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-top:42pt;padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:10.00pt">Facsimile&#58;<br>+1 212 446 4900</font></div></td></tr></table></div></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">October 29, 2025</font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Commvault Systems, Inc.</font></div><div style="padding-left:36pt;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">1 Commvault Way</font></div><div style="padding-left:36pt;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Tinton Falls, New Jersey 07724</font></div><div style="padding-left:36pt;text-indent:-36pt"><font><br></font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:2.900%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:4.020%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:89.780%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Re&#58;</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-right:-2.38pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Commvault Systems, Inc.</font></div><div style="padding-right:-2.38pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Registration Statement on Form S-8</font></div></td></tr></table></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Ladies and Gentlemen&#58; </font></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">We are issuing this opinion in our capacity as special legal counsel to Commvault Systems, Inc., a Delaware corporation (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Company</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;),</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:120%"> </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">in connection with the filing by the Company of a Registration Statement on Form S-8 (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Registration Statement</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;) under the Securities Act of 1933, as amended (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Act</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;), with the Securities and Exchange Commission (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Commission</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;), relating to the offering of up to an additional 1,300,000 shares of the Company&#8217;s common stock, par value $0.01 per share (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Plan Shares</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;), issuable pursuant to the Commvault Systems, Inc. 2016 Omnibus Incentive Plan, as amended (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Plan</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;). </font></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In connection therewith, we have examined originals, or copies certified or otherwise identified to our satisfaction, of such documents, corporate records and other instruments as we have deemed necessary  for the purpose of this opinion, including (i) the corporate and organizational documents of the Company, including the form of Amended and Restated Certificate of Incorporation of the Company (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Certificate</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;), as amended through the date hereof, and the</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:120%"> </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Amended and Restated Bylaws of the Company (the &#8220;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Bylaws</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#8221;), (ii) the minutes and records of the corporate proceedings of the Company with respect to the offering of the Plan Shares, (iii) the Plan and (iv) the Registration Statement and the exhibits thereto.</font></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">For purposes of this opinion, we have assumed the authenticity of all documents submitted to us as originals, the conformity to the originals of all documents submitted to us as copies and the authenticity of the originals of all documents submitted to us as copies.  We have also assumed the legal capacity of all natural persons, the genuineness of the signatures of persons signing all documents in connection with which this opinion is rendered, the authority of such persons signing on behalf of the parties thereto (other than the Company), and the due authorization, execution and delivery of all documents by the parties thereto (other than the Company).  As to any facts material to the opinions expressed herein which we have not independently established or verified, we have relied upon statements and representations of officers and other representatives of the Company and others.</font></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Based upon and subject to the assumptions, qualifications and limitations identified in this opinion, we are of the opinion that the Plan Shares have been duly authorized, and, when the Plan Shares have been duly issued pursuant to and in accordance with the terms and conditions of the Plan and the Certificate and the Bylaws, the Plan Shares will be validly issued, fully paid and non-assessable. </font></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Our advice on every legal issue addressed in this opinion is based exclusively on the General Corporation Law of the State of Delaware.</font></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">We do not find it necessary for the purposes of this opinion, and accordingly we do not purport to cover herein, the application of the securities or &#8220;Blue Sky&#8221; laws of the various states to the issuance of the Plan Shares.</font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:3pt;margin-top:3pt;padding-left:44.37pt;padding-right:44.37pt;text-align:justify"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:5.5pt;font-weight:400;line-height:120%">Austin Bay&#160;Area Beijing Boston Brussels Chicago Dallas Frankfurt Hong&#160;Kong Houston London Los&#160;Angeles Miami Munich Paris Philadelphia Riyadh Salt&#160;Lake&#160;City Shanghai Washington,&#160;D.C.<br></font></div></td></tr></table></div><div><font><br></font></div></div></div></div><div id="i8cc617a20b1040429921fd34bf197913_57"></div><hr style="page-break-after:always"><div style="background-color:#ffffff"><div style="min-height:136.08pt;width:100%"><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td></tr><tr style="height:21pt"><td colspan="6" style="padding:0 1pt;vertical-align:top"><div style="margin-bottom:20pt;margin-top:10pt;padding-left:2.77pt;padding-right:2.77pt;text-align:center"><img alt="image_0a.jpg" src="image_0a.jpg" style="height:16px;margin-bottom:5pt;vertical-align:text-bottom;width:193px"></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:78pt;padding-right:3.12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Commvault Systems, Inc.</font></div><div style="padding-left:78pt;padding-right:3.12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">October 29, 2025</font></div><div style="padding-left:78pt;padding-right:3.12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Page 2</font></div></td><td colspan="3" style="padding:0 1pt"></td></tr></table></div><div><font><br></font></div></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">This opinion is limited to the specific issues addressed herein, and no opinion may be inferred or implied beyond that expressly stated herein.  This opinion speaks only as of the date hereof, and we assume no obligation to revise or supplement this opinion should the General Corporation Law of the State of Delaware be changed by legislative action, judicial decision or otherwise after the date hereof. </font></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">This opinion is furnished to you in connection with the filing of the Registration Statement and may be relied upon by you and by persons entitled to rely upon it pursuant to the applicable provisions of the Act.</font></div><div style="margin-top:12pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">We hereby consent to the filing of this opinion as Exhibit 5.1 to the Registration Statement.  In giving this consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Commission. </font></div><div style="margin-top:12pt"><font><br></font></div><div style="padding-left:280.8pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:40.064%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-right:-2.38pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Sincerely,</font></div></td></tr><tr style="height:12pt"><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">&#47;s&#47; KIRKLAND &#38; ELLIS LLP</font></td></tr><tr style="height:12pt"><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">KIRKLAND &#38; ELLIS LLP</font></td></tr></table></div><div><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div></div></body></html>
</TEXT>
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<DOCUMENT>
<TYPE>EX-23.1
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<html><head>
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<title>Document</title></head><body><div id="ia1bd0f9e8d4a4644a07f0ab05bb5ddc3_1"></div><div style="min-height:72pt;width:100%"><div style="margin-bottom:8pt"><font><br></font></div></div><div style="text-align:right"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:125%">Exhibit 23.1</font></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:125%">Consent of Independent Registered Public Accounting Firm</font></div><div style="margin-bottom:8pt"><font><br></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the Commvault Systems, Inc. 2016 Omnibus Incentive Plan of our reports dated May 5, 2025, with respect to the consolidated financial statements of Commvault Systems, Inc. and the effectiveness of internal control over financial reporting of Commvault Systems,&#160;Inc. included in its Annual Report (Form&#160;10-K) for the year ended March 31, 2025, filed with the Securities and Exchange Commission.</font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:120%">&#160;</font></div><div style="margin-bottom:8pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:49.300%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:48.500%"></td><td style="width:0.1%"></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:125%">&#47;s&#47; Ernst &#38; Young LLP</font></td><td colspan="3" style="padding:0 1pt"></td></tr><tr style="height:15pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">Iselin, New Jersey</font></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:11pt;font-weight:400;line-height:100%">October 29, 2025</font></td><td colspan="3" style="padding:0 1pt"></td></tr></table></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="margin-bottom:8pt"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="padding-left:216pt;text-align:justify"><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="margin-bottom:8pt"><font><br></font></div></div></div></body></html>
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<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<span style="display: none;">v3.25.3</span><table class="report" border="0" cellspacing="2" id="id2">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Submission<br></strong></div></th>
<th class="th"><div>Oct. 29, 2025</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_SubmissionLineItems', window );"><strong>Submission [Line Items]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Central Index Key</a></td>
<td class="text">0001169561<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Registrant Name</a></td>
<td class="text">Commvault Systems, Inc<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FormTp', window );">Form Type</a></td>
<td class="text">S-8<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_SubmissnTp', window );">Submission Type</a></td>
<td class="text">S-8<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeeExhibitTp', window );">Fee Exhibit Type</a></td>
<td class="text">EX-FILING FEES<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OffsetTableNa', window );">Offset Table N/A</a></td>
<td class="text">N/A<span></span>
</td>
</tr>
</table>
<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
</tr>
<tr>
<td><strong> Data Type:</strong></td>
<td>dei:centralIndexKeyItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityRegistrantName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_ffd_FeeExhibitTp">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<DESCRIPTION>IDEA: XBRL DOCUMENT
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<span style="display: none;">v3.25.3</span><table class="report" border="0" cellspacing="2" id="id2">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Offerings - Offering: 1<br></strong></div></th>
<th class="th">
<div>Oct. 29, 2025 </div>
<div>USD ($) </div>
<div>shares</div>
</th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OfferingTable', window );"><strong>Offering:</strong></a></td>
<td class="text">&#160;<span></span>
</td>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_PrevslyPdFlg', window );">Fee Previously Paid</a></td>
<td class="text">false<span></span>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeesOthrRuleFlg', window );">Other Rule</a></td>
<td class="text">true<span></span>
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<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OfferingSctyTp', window );">Security Type</a></td>
<td class="text">Equity<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OfferingSctyTitl', window );">Security Class Title</a></td>
<td class="text">Common Stock, par value $0.01 per share<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_AmtSctiesRegd', window );">Amount Registered | shares</a></td>
<td class="nump">1,300,000<span></span>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_MaxOfferingPricPerScty', window );">Proposed Maximum Offering Price per Unit</a></td>
<td class="nump">172.80<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_MaxAggtOfferingPric', window );">Maximum Aggregate Offering Price</a></td>
<td class="nump">$ 224,640,000<span></span>
</td>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeeRate', window );">Fee Rate</a></td>
<td class="nump">0.01381%<span></span>
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<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_FeeAmt', window );">Amount of Registration Fee</a></td>
<td class="nump">$ 31,022.78<span></span>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_ffd_OfferingNote', window );">Offering Note</a></td>
<td class="text"><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:6.5pt;font-weight:400;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">(1)</span></div><div style="margin-bottom:3pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">This Registration Statement on Form S-8 registers offers and sales of 1,300,000 shares of common stock, par value $0.01 per share (&#8220;Common Stock&#8221;), of Commvault Systems, Inc. Pursuant to Rule 416(a), the number of shares being registered shall be adjusted to include any additional shares that may become issuable as a result of stock splits, stock dividends or similar transactions in accordance with the Commvault Systems, Inc. 2016 Omnibus Incentive Plan, as amended, and agreements evidencing awards granted thereunder.</span></div><div style="margin-bottom:3pt"><span style="color:#000000;font-family:'Times New Roman',serif;font-size:6.5pt;font-weight:400;line-height:120%;position:relative;top:-3.5pt;vertical-align:baseline">(2) </span></div><div><span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Estimated solely for the purpose of computing the registration fee pursuant to Rule 457(h) and Rule 457(c) under the Securities Act of 1933, as amended. The price per share of Common Stock is based on the average of the high and low prices reported for a share of Common Stock on the Nasdaq Stock Market on October 27, 2025.</span></div><span></span>
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<div style="display: none;">
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The amount of securities being registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<td style="white-space:nowrap;">ffd_AmtSctiesRegd</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Total amount of registration fee (amount due after offsets).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The rate per dollar of fees that public companies and other issuers pay to register their securities with the Commission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">ffd_FeeRate</td>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Checkbox indicating whether filer is using a rule other than 457(a), 457(o), or 457(f) to calculate the registration fee due.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<td>duration</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The maximum aggregate offering price for the offering that is being registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The maximum offering price per share/unit being registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The title of the class of securities being registered (for each class being registered).</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Type of securities: "Asset-backed Securities", "ADRs/ADSs", "Debt", "Debt Convertible into Equity", "Equity", "Face Amount Certificates", "Limited Partnership Interests", "Mortgage Backed Securities", "Non-Convertible Debt", "Unallocated (Universal) Shelf", "Exchange Traded Vehicle Securities", "Other"</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Fees Summary<br></strong></div></th>
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<div>Oct. 29, 2025 </div>
<div>USD ($)</div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- References</a><div><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br></p></div>
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