SentinelOne CAO sells 21,440 shares near $19

SentinelOne’s chief accounting officer reported 21,440 shares sold, including a 10b5-1 trade and a mandatory sell-to-cover for RSU tax withholding.

Rhea-AI Filing Summary

SentinelOne, Inc. (S) reports that Chief Accounting Officer Robin Tomasello sold a total of 21,440 shares of Class A common stock on September 8, 2026 in two open-market or private transactions. One sale of 7,235 shares at a weighted average of $19.4394 was effected under a Rule 10b5-1 trading plan adopted June 9, 2026. A second sale of 14,205 shares at $19.79 was an issuer-mandated "sell to cover" to satisfy tax withholding on vesting Restricted Stock Units and was not a discretionary trade. Certain remaining shares are subject to forfeiture if vesting conditions are not met; post-transaction holdings are not stated.

Insider Trade Summary 10b5-1

Net Seller: 21,440 shares

Net Sell 2 txns

Insider TOMASELLO ROBIN

Role Chief Accounting Officer

Sold 21,440 shs ($422K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2, F3	7,235	$19.4394	$141K
Sale	Class A Common Stock F4, F3	14,205	$19.79	$281K

Holdings After Transaction: Class A Common Stock — 418,423 shares (Direct)

Footnotes (4)

1. F1. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 9, 2026.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.11 to $19.71, 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. F3. Certain of the shares are subject to forfeiture to the Issuer if underlying vesting conditions are not met.
4. F4. This sale 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.

Key Figures

Shares sold in first transaction: 7,235 shares Weighted average price, first sale: $19.4394 per share Price range, first sale: $19.11–$19.71 per share +4 more

7 metrics

Shares sold in first transaction 7,235 shares Class A Common Stock sold on September 8, 2026 under a Rule 10b5-1 plan

Weighted average price, first sale $19.4394 per share 7,235-share sale; individual trades between $19.11 and $19.71

Price range, first sale $19.11–$19.71 per share Range of prices for multiple trades comprising the 7,235-share sale

Shares sold in second transaction 14,205 shares Issuer-mandated sell-to-cover sale on September 8, 2026

Price, second sale $19.79 per share Sell-to-cover transaction to satisfy RSU tax withholding

Total shares sold 21,440 shares Combined shares sold across both transactions reported

Rule 10b5-1 plan adoption date June 9, 2026 Plan under which the 7,235-share sale was effected

Key Terms

Rule 10b5-1 trading plan, Restricted Stock Units, sell to cover, weighted average price

4 terms

Rule 10b5-1 trading plan regulatory

"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

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

"tax withholding obligations 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.

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.

FAQ

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

SentinelOne reported that Chief Accounting Officer Robin Tomasello sold 21,440 shares of Class A common stock on September 8, 2026 in two transactions classified as sales in open market or private transactions.

How many SentinelOne (S) shares did the officer sell and at what prices?

Robin Tomasello sold 7,235 shares at a weighted average price of $19.4394 and 14,205 shares at $19.79 per share. The first sale’s prices ranged between $19.11 and $19.71.

Were the SentinelOne (S) insider sales made under a Rule 10b5-1 plan?

Yes. The Form 4 indicates the transactions under the Rule 10b5-1 checkbox, and a footnote states that the 7,235-share sale was effected pursuant to a Rule 10b5-1 trading plan adopted on June 9, 2026.

Was any part of the SentinelOne (S) insider sale discretionary?

A 14,205-share sale at $19.79 was an issuer-mandated “sell to cover” to fund tax withholding on vesting RSUs under the equity incentive plan and is described as not a discretionary trade by the reporting person.

What does the Form 4 say about remaining SentinelOne (S) shares held by the officer?

The filing notes that certain remaining shares are subject to forfeiture to SentinelOne if underlying vesting conditions are not met. The exact number of shares held after the transactions is not provided.

What price range applied to part of the SentinelOne (S) insider sale?

For the 7,235-share transaction, the Form 4 reports a weighted average price and states shares were sold in multiple trades at prices ranging from $19.11 to $19.71 per share.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/09/2026 - 08:41 PM Accepted by SEC EDGAR 09/09/2026 - 08:40 PM Learn about SEC filing dates

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).

X

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)
09/08/2026

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	09/08/2026		S(1)		7,235	D	$19.4394(2)	432,628(3)	D
Class A Common Stock	09/08/2026		S(4)		14,205	D	$19.79	418,423(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. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 9, 2026.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.11 to $19.71, 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.

4. This sale 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.

Remarks:

	/s/ Keenan Conder, Attorney-in-Fact	09/09/2026
	** 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)