SentinelOne (S) CAO executes mandated RSU sell-to-cover tax sale

Rhea-AI Filing Summary

SentinelOne, Inc. Chief Accounting Officer Robin Tomasello reported an open-market sale of 11,905 shares of Class A common stock at a weighted average price of $15.7005 per share. The sale was mandated by the company solely to cover tax withholding obligations from vesting Restricted Stock Units, rather than a discretionary trade. After this transaction, Tomasello directly holds 445,330 shares, some of which may be forfeited if vesting conditions are not met.

Insights

Equity compensation and insider-trading analyst

Routine tax-related sale tied to RSU vesting, not a discretionary share disposal.

The transaction involves 11,905 SentinelOne Class A shares sold at a weighted average of $15.7005 per share. Footnotes state this was an issuer-mandated “sell to cover” to fund tax withholding on vesting Restricted Stock Units, as required under the equity plan.

Because the sale is purely to satisfy tax obligations, it carries limited informational value about the insider’s view of the stock. Following the sale, Robin Tomasello holds 445,330 shares directly, though some are subject to forfeiture if vesting conditions are not met.

Insider Trade Summary

Net Seller: 11,905 shares ($186,914)

Net Sell 1 txn

Insider TOMASELLO ROBIN

Role Chief Accounting Officer

Sold 11,905 shs ($187K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	11,905	$15.7005	$187K

Holdings After Transaction: Class A Common Stock — 445,330 shares (Direct, null)

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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.69 to $15.72, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein. Certain of the shares are subject to forfeiture to the Issuer if underlying vesting conditions are not met.

Key Figures

Shares sold: 11,905 shares Weighted average sale price: $15.7005 per share Post-transaction holdings: 445,330 shares +1 more

4 metrics

Shares sold 11,905 shares Issuer-mandated sell-to-cover on RSU vesting

Weighted average sale price $15.7005 per share Open-market sale to cover tax withholding

Post-transaction holdings 445,330 shares Class A common stock held directly after sale

Sale price range $15.69–$15.72 per share Multiple transactions within disclosed range

Key Terms

Restricted Stock Units, sell to cover, tax withholding obligations, weighted average price

4 terms

Restricted Stock Units financial

"connection with the vesting and settlement of Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

sell to cover financial

"must be funded by a "sell to cover" transaction"

Sell to cover is when a person who receives company stock through options or awards sells just enough shares immediately to pay required taxes, exercise costs, or fees, keeping the rest. Think of it like cashing part of a bonus to cover the tax bill so you can keep the remainder. For investors, it can create predictable small selling pressure and slightly change the number of shares actually held by insiders without increasing long‑term dilution.

tax withholding obligations financial

"sale ... to cover tax withholding obligations in connection with the vesting"

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

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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)
06/08/2026

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	06/08/2026		S(1)		11,905	D	$15.7005(2)	445,330(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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.69 to $15.72, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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	06/09/2026
	** 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)

FAQ

What did SentinelOne (S) insider Robin Tomasello report in this Form 4?

Robin Tomasello, Chief Accounting Officer of SentinelOne, reported selling 11,905 shares of Class A common stock. The sale was conducted at a weighted average price of $15.7005 per share as part of a company-mandated transaction to cover tax withholding on vesting Restricted Stock Units.

Was the SentinelOne (S) insider sale by Robin Tomasello a discretionary trade?

No, the sale was not discretionary. Footnotes explain it was an issuer-mandated “sell to cover” transaction required under SentinelOne’s equity incentive plan to fund tax withholding obligations arising from the vesting and settlement of Restricted Stock Units.

How many SentinelOne (S) shares did Robin Tomasello sell and at what price?

Robin Tomasello sold 11,905 shares of SentinelOne Class A common stock. The Form 4 reports a weighted average price of $15.7005 per share, with multiple sale transactions executed within a price range from $15.69 to $15.72 per share, inclusive.

How many SentinelOne (S) shares does Robin Tomasello hold after this transaction?

After the reported tax-related sale, Robin Tomasello directly holds 445,330 shares of SentinelOne Class A common stock. The Form 4 notes that certain shares remain subject to forfeiture back to the company if the underlying vesting conditions are not satisfied in the future.

Why did SentinelOne (S) require a sell-to-cover transaction for this insider?

SentinelOne’s equity incentive plan requires that tax withholding obligations from vesting equity awards be satisfied via a “sell to cover” transaction. As a result, the company mandated selling 11,905 shares from Robin Tomasello’s award to generate cash for the required tax payments.

What price range is disclosed for Robin Tomasello’s SentinelOne (S) share sales?

The Form 4 states that the reported price is a weighted average, with individual sales executed between $15.69 and $15.72 per share. Tomasello undertakes to provide detailed trade-level price information to the company, shareholders, or SEC staff upon request.