Form 4: Robin Tomasello Executes RSU "Sell to Cover" of 8,508 S Shares

Rhea-AI Filing Summary

Insider sale tied to RSU tax withholding at SentinelOne (S). Chief Accounting Officer Robin Tomasello sold 8,508 shares of Class A common stock on 09/08/2025 at $18.69 per share as an issuer-mandated "sell to cover" to satisfy tax withholding obligations related to the vesting and settlement of restricted stock units. After the transaction the reporting person beneficially owned 297,536 shares (direct). The filing notes some of the reported shares remain subject to forfeiture if vesting conditions are not met. The Form 4 was signed by an attorney-in-fact on 09/09/2025.

Positive

• Transaction disclosed promptly with Form 4 filed and signed by an attorney-in-fact on 09/09/2025
• Sale was issuer-mandated for tax withholding, indicating it was not a discretionary trade by the reporting person

Negative

• Insider sold 8,508 shares of Class A common stock at $18.69, reducing direct holdings
• Some reported shares are subject to forfeiture if underlying vesting conditions are not met

Insights

Financial Analyst

Routine tax-driven sale; limited direct informational value about company performance.

The Form 4 documents an issuer-mandated "sell to cover" of 8,508 Class A shares at $18.69 tied to RSU vesting. Because the sale was performed to satisfy tax withholding and is not a discretionary trade, it provides minimal signal about the executive's view on SentinelOne's near-term outlook. The remaining direct beneficial ownership of 297,536 shares provides context on the reporting person's continued equity stake, while the note that some shares are subject to forfeiture indicates ongoing vesting contingencies.

Corporate Governance Expert

Disclosure aligns with standard equity compensation and reporting practices; no governance red flags disclosed.

The filing explicitly states the sale was an issuer-mandated action to fund tax withholding for RSU settlement, which is consistent with many companies' "sell to cover" procedures. The report identifies the reporting person as an officer (Chief Accounting Officer) and discloses direct ownership post-transaction. The mention of forfeitable shares is standard for unvested awards. There are no indications of unusual trading codes or atypical execution dates in this Form 4.

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

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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 CA 94041

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
09/08/2025

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

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

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

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	09/08/2025		S(1)		8,508	D	$18.69	297,536(2)	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 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 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.

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

Remarks:

	/s/ Keenan Conder, Attorney-in-Fact	09/09/2025
	** 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.

FAQ

What did Robin Tomasello report in the Form 4 for SentinelOne (S)?

The Form 4 reports a sale of 8,508 Class A shares on 09/08/2025 at $18.69 per share; beneficial ownership after the sale was 297,536 shares (direct).

Why were the 8,508 shares sold according to the filing?

The filing states the sale was an issuer-mandated "sell to cover" to satisfy tax withholding obligations related to the vesting and settlement of restricted stock units.

Does the Form 4 indicate the sale was a discretionary trade?

No; the filing explicitly says the sale does not represent a discretionary trade by the reporting person and was done to fund tax withholding.

Are any of the reported shares subject to forfeiture?

Yes; the filing notes that certain of the shares are subject to forfeiture if underlying vesting conditions are not met.

When was the Form 4 signed and filed?

The Form 4 shows a signature by an attorney-in-fact on 09/09/2025.