SentinelOne (S) CAO gains stock from performance RSUs, sells shares to cover taxes

Rhea-AI Filing Summary

SentinelOne, Inc. Chief Accounting Officer Robin Tomasello reported routine equity compensation activity. On March 23, 2026, she acquired 4,148 shares of Class A common stock at $0.00 per share from the vesting and settlement of a performance-based restricted stock unit award tied to corporate performance milestones.

On March 25, 2026, she sold 1,496 shares at an average price of $13.37 per share in an issuer-mandated “sell to cover” transaction to satisfy tax withholding obligations related to this vesting, which the company states was not a discretionary trade. After these transactions, she directly holds 403,523 shares of Class A common stock.

Insider Trade Summary

Net Seller: 1,496 shares ($20,002)

Net Sell 2 txns

Insider TOMASELLO ROBIN

Role Chief Accounting Officer

Sold 1,496 shs ($20K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	1,496	$13.37	$20K
Grant/Award	Class A Common Stock	4,148	$0.00	--

Holdings After Transaction: Class A Common Stock — 403,523 shares (Direct)

Footnotes (1)

1. The reported transaction represents the certification of achievement of the second of four tranches of a performance-based restricted stock unit award granted to the reporting person by the Issuer's compensation committee on March 15, 2024 (the "2024 PRSU Award"). Vesting of each tranche of the 2024 PRSU Award is based on the achievement of pre-determined corporate performance milestones and is subject to the reporting person's continued service through the certification date of achievement of the relevant tranche. On March 23, 2026 (the "Certification Date"), the Issuer's compensation committee certified achievement of the second tranche of the 2024 PRSU Award, resulting in one-fourth of the 2024 PRSU Award becoming earned at 90.2% of the target amount granted. The performance restricted stock units comprising the second tranche of the 2024 PRSU Award so earned are fully vested and may be settled for shares of the Issuer's Class A common stock on the Certification Date. Certain of the shares are subject to forfeiture to the Issuer if underlying vesting conditions are not met. The sale reported on this Form 4 represents an Issuer mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of performance-based Restricted Stock Units, and it does not represent a discretionary trade by the Reporting Person. Pursuant to the Issuer's equity incentive plan, an award recipient's tax withholding obligations must be funded by a "sell to cover" transaction.

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

TOMASELLO ROBIN

(Last) (First) (Middle)

C/O SENTINELONE, INC.

444 CASTRO STREET, SUITE 400

(Street)

MOUNTAIN VIEW CALIFORNIA 94041

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SentinelOne, Inc. [ S ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/23/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	03/23/2026		A(1)(2)		4,148	A	$0	405,019(3)	D
Class A Common Stock	03/25/2026		S(4)		1,496	D	$13.37	403,523(3)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The reported transaction represents the certification of achievement of the second of four tranches of a performance-based restricted stock unit award granted to the reporting person by the Issuer's compensation committee on March 15, 2024 (the "2024 PRSU Award"). Vesting of each tranche of the 2024 PRSU Award is based on the achievement of pre-determined corporate performance milestones and is subject to the reporting person's continued service through the certification date of achievement of the relevant tranche.

2. On March 23, 2026 (the "Certification Date"), the Issuer's compensation committee certified achievement of the second tranche of the 2024 PRSU Award, resulting in one-fourth of the 2024 PRSU Award becoming earned at 90.2% of the target amount granted. The performance restricted stock units comprising the second tranche of the 2024 PRSU Award so earned are fully vested and may be settled for shares of the Issuer's Class A common stock on the Certification Date.

3. Certain of the shares are subject to forfeiture to the Issuer if underlying vesting conditions are not met.

4. The sale reported on this Form 4 represents an Issuer mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of performance-based Restricted Stock Units, and it does not represent a discretionary trade by the Reporting Person. Pursuant to the Issuer's equity incentive plan, an award recipient's tax withholding obligations must be funded by a "sell to cover" transaction.

Remarks:

	/s/ Keenan Conder, Attorney-in-Fact	03/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)