Form 4: SentinelOne Insider Sells Shares to Cover RSU Taxes

Rhea-AI Filing Summary

SentinelOne (ticker S) Chief Accounting Officer Robin Tomasello filed a Form 4 reporting an issuer-mandated “sell-to-cover” transaction on 08/06/2025. The officer sold 2,921 Class A shares at $17.31 each (transaction code S) solely to satisfy payroll tax withholding triggered by the vesting of previously granted RSUs; the filing states the trade was non-discretionary.

Following the sale, the officer still owns 306,044 Class A shares (direct ownership), of which 374 were acquired under the Employee Stock Purchase Plan; some shares remain subject to forfeiture if vesting conditions are not met.

No derivative securities were reported. The disclosure does not reflect any change in compensation structure or company fundamentals, but it does update the public float and insider ownership profile.

Positive

• Officer retains a sizeable 306,044-share position, preserving alignment with shareholders despite the small sale.

Negative

• Form 4 records an insider sale, which can sometimes be perceived as a bearish signal even though the trade was non-discretionary.

Insights

Financial Analyst

TL;DR: Small mandatory sale; negligible impact on valuation.

The 2,921-share sale (~$51k) is immaterial relative to SentinelOne’s market cap and the officer’s remaining 306k-share stake. Because it was required to cover tax withholdings, it carries little negative signaling versus discretionary insider selling. Investors may view the unchanged, substantial residual holding as a sign of continued alignment. Overall, the filing is routine housekeeping with no implications for revenue, guidance or liquidity.

Insider Trade Summary

Net Seller: 2,921 shares ($50,563)

Net Sell 1 txn

Insider TOMASELLO ROBIN

Role Chief Accounting Officer

Sold 2,921 shs ($51K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	2,921	$17.31	$51K

Holdings After Transaction: Class A Common Stock — 306,044 shares (Direct)

Footnotes (1)

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. Includes 374 of Class A Common Stock acquired by the reporting person in one or more transactions with issuer pursuant to its Employee Stock Purchase Plan, which transactions are exempt pursuant to Rules 16a3(f)(1)(i)(B) and 16b3(c). Certain of the shares are subject to forfeiture to the Issuer if underlying vesting conditions are not met.

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 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)
08/06/2025

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	08/06/2025		S(1)		2,921	D	$17.31	306,044(2)(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 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. Includes 374 of Class A Common Stock acquired by the reporting person in one or more transactions with issuer pursuant to its Employee Stock Purchase Plan, which transactions are exempt pursuant to Rules 16a3(f)(1)(i)(B) and 16b3(c).

3. 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	08/07/2025
	** 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

How many SentinelOne shares did the CAO sell?

The Form 4 shows a sale of 2,921 Class A shares.

At what price were the shares sold?

Shares were sold at $17.31 per share.

Why did Robin Tomasello sell SentinelOne stock?

The sale was an issuer-mandated “sell-to-cover” transaction to fund tax withholding on vested RSUs.

How many shares does the officer still own after the transaction?

Post-sale, Tomasello beneficially owns 306,044 Class A shares.

Does this Form 4 include any options or other derivative securities?

No derivative securities were reported in Table II of the filing.