SentinelOne (NYSE: S) adds director Barrenechea to key governance committee

Rhea-AI Filing Summary

SentinelOne, Inc. filed an amended report to update the board responsibilities of a recently appointed director. On December 3, 2025, the board appointed Mark Barrenechea as a director. His committee roles were not set at that time.

On December 9, 2025, the board appointed Mr. Barrenechea to serve on SentinelOne’s Nominating and Corporate Governance Committee, effective that same day. This amendment formally records his committee assignment but does not change the company’s capital structure or disclose new financial results.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K/A

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 4, 2025

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 5.02 Departures of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On December 3, 2025, the Board of Directors (the “Board”) of SentinelOne, Inc. (the “Company”) appointed Mark Barrenechea to the Board. Mr. Barrenechea’s appointment was reported under Item 5.02 on the Company’s Current Report on Form 8-K filed on December 4, 2025. Mr. Barrenechea’s committee assignments had not been determined at that time.

The Company is filing this Form 8-K/A to report that on December 9, 2025, the Board appointed Mr. Barrenechea to serve as a member of the Company’s Nominating and Corporate Governance Committee, effective as of that date.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

SENTINELONE, INC.

Date: December 11, 2025

By:

/s/ Keenan Conder

Keenan Conder

Chief Legal Officer and Secretary

FAQ

What change does SentinelOne (S) disclose in this 8-K/A filing?

SentinelOne discloses an update to board committee assignments. The board appointed director Mark Barrenechea to the Nominating and Corporate Governance Committee, effective December 9, 2025, completing details that were not available when his original director appointment was reported earlier in December.

Who is Mark Barrenechea in SentinelOne’s (S) latest SEC filing?

Mark Barrenechea is a director on SentinelOne’s board. He was appointed on December 3, 2025, and this amendment reports that, as of December 9, 2025, he also serves on the Nominating and Corporate Governance Committee, expanding his formal governance role within the company.

Does SentinelOne’s 8-K/A involve any financial transactions or results?

No, the amendment focuses solely on corporate governance. It updates SentinelOne’s disclosure to show that director Mark Barrenechea joined the Nominating and Corporate Governance Committee on December 9, 2025, and does not address earnings, cash flows, securities offerings, or other financial transactions.

Why did SentinelOne (S) need to amend its earlier Form 8-K?

SentinelOne amended its earlier Form 8-K because committee assignments for new director Mark Barrenechea were undecided when the original filing was made. The 8-K/A now confirms his appointment to the Nominating and Corporate Governance Committee effective December 9, 2025, completing the prior disclosure.

Does SentinelOne’s 8-K/A change the board structure or just committee roles?

The 8-K/A changes only committee roles, not the overall board size. It confirms that existing director Mark Barrenechea will serve on the Nominating and Corporate Governance Committee from December 9, 2025, clarifying his specific responsibilities within SentinelOne’s board governance framework.