SentinelOne CAO sells 13,311 shares at ~$19.95

SentinelOne’s chief accounting officer executed a small planned share sale under a Rule 10b5-1 plan and continues to hold over 400,000 shares.

Rhea-AI Filing Summary

SentinelOne, Inc. (S) reported that its Chief Accounting Officer, Robin Tomasello, sold 13,311 shares of Class A Common Stock on September 10, 2026, at a weighted average price of $19.9468 per share under a Rule 10b5-1 trading plan. Following this transaction, Tomasello held 405,112 shares directly, some of which are subject to forfeiture if vesting conditions are not met.

Insider Trade Summary 10b5-1

Net Seller: 13,311 shares

Net Sell 1 txn

Insider TOMASELLO ROBIN

Role Chief Accounting Officer

Sold 13,311 shs ($266K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2, F3	13,311	$19.9468	$266K

Holdings After Transaction: Class A Common Stock — 405,112 shares (Direct)

Footnotes (3)

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 $19.24 to $20.09, 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.

Key Figures

Shares sold: 13,311 shares Weighted average sale price: $19.9468 per share Sale price range: $19.24–$20.09 per share +2 more

5 metrics

Shares sold 13,311 shares Class A Common Stock sale on September 10, 2026

Weighted average sale price $19.9468 per share Weighted average for 13,311 shares sold on September 10, 2026

Sale price range $19.24–$20.09 per share Range of prices for multiple trades on September 10, 2026

Shares held after transaction 405,112 shares Direct holdings by Robin Tomasello following the sale

Rule 10b5-1 plan adoption date June 9, 2026 Trading plan under which the September 10, 2026 sale was effected

Key Terms

Rule 10b5-1 trading plan, weighted average price, vesting conditions, subject to forfeiture

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.

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.

vesting conditions other

"subject to forfeiture to the Issuer if underlying vesting conditions are not met"

Vesting conditions are the rules that determine when someone earning company stock or stock options actually gains the right to keep or sell them, typically based on staying with the company for a set time or meeting performance targets. Think of it like keys that unlock gradually — some unlock by calendar date, others only after agreed milestones. Investors care because vesting shapes management incentives, the timing of share sales, and the number of shares that can enter the market, which can affect a company's valuation and ownership mix.

subject to forfeiture financial

"Certain of the shares are subject to forfeiture to the Issuer"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did SentinelOne (S) disclose for September 10, 2026?

SentinelOne disclosed that Chief Accounting Officer Robin Tomasello sold 13,311 shares of Class A Common Stock on September 10, 2026 in a reported sale transaction.

At what price did the SentinelOne (S) insider sell shares on September 10, 2026?

The reported price is a weighted average of $19.9468 per share. The 13,311 shares were sold in multiple transactions at prices ranging from $19.24 to $20.09, inclusive.

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

Yes. The sale was effected pursuant to a Rule 10b5-1 trading plan that Robin Tomasello adopted on June 9, 2026, and the filing affirms use of such a plan.

How many SentinelOne (S) shares does the insider hold after the reported sale?

After the sale, Chief Accounting Officer Robin Tomasello directly held 405,112 shares of SentinelOne Class A Common Stock, with certain shares subject to forfeiture if vesting conditions are not satisfied.

How many SentinelOne (S) shares did the insider sell in total in this Form 4?

The Form 4 reports a single sale transaction of 13,311 shares of SentinelOne Class A Common Stock, categorized as a sale in open market or private transaction.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/11/2026 - 05:48 PM Accepted by SEC EDGAR 09/11/2026 - 05:47 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)
09/10/2026

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	09/10/2026		S(1)		13,311	D	$19.9468(2)	405,112(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 $19.24 to $20.09, 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	09/11/2026
	** 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)