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s-202603120001583708FALSE00015837082026-03-122026-03-12

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 12, 2026

SENTINELONE, INC.

(Exact name of registrant as specified in its charter)

Delaware 001-40531 99-0385461

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

444 Castro Street

Suite 400

Mountain View California 94041

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (855) 868-3733 Not Applicable (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Class A common stock, par value $0.0001 S New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

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 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition.

On March 12, 2026, SentinelOne, Inc. (the “Company”) announced its financial results for the fourth quarter and fiscal year ended January 31, 2026, by issuing an earnings presentation and a press release. The Company also announced that it would hold a webcast to discuss its financial results for the fourth quarter and fiscal year ended January 31, 2026. A copy of the press release and the earnings presentation is furnished herewith as Exhibits 99.1 and 99.2, respectively.

The Company makes reference to non-GAAP financial information in the Company’s press release, earnings presentation and the webcast call. A reconciliation of these non-GAAP financial measures to the comparable GAAP financial measures is contained in the attached press release and earnings presentation.

The information contained herein and in the accompanying exhibits are “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and shall not be incorporated by reference in any filing under Securities Act of 1933, as amended, or the Exchange Act regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing.

Item 7.01 Regulation FD Disclosure.

On March 12, 2026, the Company posted supplemental investor materials on the Investors Relations section of its website, available at investors.sentinelone.com. The Company announces material information to the public through filings with the Securities and Exchange Commission, the investor relations page on the Company’s website, press releases, public conference calls, webcasts, the Company’s news website, available at sentinelone.com/press and blog posts on the Company’s corporate website at sentinelone.com/blog in order to achieve broad, non-exclusionary distribution of information to the public and for complying with its disclosure obligations under Regulation FD.

The information disclosed by the foregoing channels could be deemed to be material information. As such, the Company encourages investors, the media and others to follow the channels listed above and to review the information disclosed through such channels.

Any updates to the list of disclosure channels through which the Company announces information will be posted on the investor relations page on the Company’s website.

Item 9.01    Financial Statements and Exhibits.

(d) Exhibits

Exhibit Number Exhibit Description

99.1 Press Release issued by SentinelOne, Inc. dated March 12, 2026.

99.2 Earnings Presentation, dated March 12, 2026.

104 Cover Page Interactive Data File (embedded within the Inline XBRL docume

s-202512040001583708FALSE00015837082025-08-282025-08-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 04, 2025

SENTINELONE, INC.

(Exact name of registrant as specified in its charter)

Delaware001-4053199-0385461 (State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

444 Castro Street Suite 400 Mountain View California 94041 (Address, including zip code, of principal executive offices)

Registrant’s telephone number, including area code: (855) 868-3733 Not Applicable (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading Symbol(s)Name of each exchange on which registered Class A common stock, par value $0.0001SNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company☐ 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 13(a) of the Exchange Act.☐

Item 2.02 Results of Operations and Financial Condition. On December 4, 2025, SentinelOne, Inc. (the “Company”) announced its financial results for the third quarter of fiscal year 2026 ended October 31, 2025, by issuing an earnings presentation and a press release. The Company also announced that it would hold a webcast to discuss its financial results for the third quarter of fiscal year 2026 ended October 31, 2025. A copy of the press release and the earnings presentation is furnished herewith as Exhibit 99.1 and 99.2, respectively. The Company makes reference to non-GAAP financial information in the Company’s press release, earnings presentation and the webcast call. A reconciliation of these non-GAAP financial measures to the comparable GAAP financial measures is contained in the attached press release and earnings presentation. The information contained herein and in the accompanying exhibits are “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. Item 5.02 Departures of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. Appointment of Mark Barrenechea as Class II Director On December 3, 2025, the Board of Directors (the “Board”) of the Company appointed Mark Barrenechea to serve as a member of the Board. Mr. Barrenechea will serve as a Class II director, whose term expires at the Company’s annual meeting of stockholders to be held in 2026, and until Mr. Barrenechea’s successor shall have been duly elected and qualified, or until Mr. Barrenechea’s earlier death, resignation, disqualification or removal. Mr. Barrenechea has not yet been appointed to any standing committees of the Board. The Company will file an amendment to this Form 8-K to disclose any such appointments after they are made. Mr. Barrenechea served as the Chief Executive Officer and Chief Technology Officer of OpenText Corporation, an information management software products company, from January 2012 to August 2025. Prior to that, he served as the President and Chief Executive Officer of Silicon Graphics International Corporation, a computer hardware and software company, from 2006 to 2012. Mr. Barrenechea served on the board of directors of OpenText from January 2012 to August 2025 and Avery Dennison Corporation, a global materials science and digital identification solutions company, from February 2018 to April 2022.