SentinelOne officer plans sale of 12,403 shares

SentinelOne, Inc. (S) received a notice that officer Robin Tomasello intends to sell 12,403 shares of common stock under Rule 144.

Available on EDGAR 09/08/2026 - 04:26 PM EDT Accepted by SEC EDGAR 09/08/2026 - 04:26 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

SentinelOne, Inc. (S) received a notice that officer Robin Tomasello intends to sell 12,403 shares of common stock under Rule 144. The shares were acquired upon vesting of restricted stock units between June 5, 2026 and August 5, 2026, with an indicated aggregate market value of $246,571.64. An earlier sale disclosed in the notice shows 5,467 shares sold on August 6, 2026 for $109,799.23, and common shares outstanding are listed as 342,184,493.

Key Figures

Shares to be sold: 12,403 shares Aggregate market value of planned sale: $246,571.64 Shares outstanding: 342,184,493 shares +3 more

6 metrics

Shares to be sold 12,403 shares Common stock listed as securities to be sold under Rule 144

Aggregate market value of planned sale $246,571.64 Value associated with 12,403 shares of common stock

Shares outstanding 342,184,493 shares Common shares outstanding referenced in the securities information section

Shares sold in past 3 months 5,467 shares Common stock sold on August 6, 2026 by Robin Tomasello

Proceeds from prior sale $109,799.23 Value of 5,467 shares of common stock sold on August 6, 2026

Date of Notice September 8, 2026 Date of the Form 144 notice signed by Robin Tomasello

Key Terms

Rule 144, Restricted Stock Units, securities to be sold, aggregate market value

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"The securities to be sold were acquired upon the vesting 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.

securities to be sold financial

"Information is to be given not only as to the person for whose account the securities are to be sold"

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services ... | 12403 | 246571.64"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

What does SentinelOne (S) disclose in this Form 144 notice?

The notice states that officer Robin Tomasello plans to sell 12,403 shares of SentinelOne common stock under Rule 144, acquired from vesting of restricted stock units between June 5, 2026 and August 5, 2026, with an indicated aggregate market value of $246,571.64.

How many SentinelOne (S) shares are being proposed for sale under this Form 144?

The filing lists 12,403 shares of SentinelOne common stock as the securities to be sold, with an indicated aggregate market value of $246,571.64, and identifies the securities as acquired upon vesting of restricted stock units from the issuer.

What prior SentinelOne (S) sales by Robin Tomasello are reported in the past 3 months?

The notice reports that 5,467 shares of SentinelOne common stock were sold on August 6, 2026 for total proceeds of $109,799.23. This is disclosed in the section covering securities sold during the past three months.

How many SentinelOne (S) shares are outstanding as referenced in the Form 144?

The filing lists 342,184,493 shares of SentinelOne common stock as outstanding in the securities information section. This figure provides a baseline for the company’s total common shares but is separate from the shares covered by this notice.

What is the acquisition source and type of the SentinelOne (S) shares in this Form 144?

The securities to be sold are identified as Common stock acquired on June 5, 2026 through Restricted Stock Units from the issuer. The remarks note they were acquired upon vesting of restricted stock units during June 5, 2026 through August 5, 2026.

When was the SentinelOne (S) Form 144 notice by Robin Tomasello dated?

The notice is dated September 8, 2026, as shown in the Date of Notice section, and is signed by /s/ Robin Tomasello acknowledging the planned Rule 144 sale of the specified securities.

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

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001608511
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	SENTINELONE, INC
SEC File Number	001-40531
Address of Issuer	444 Castro Street, Suite 400 Mountain View CALIFORNIA 94041
Phone	8558683733
Name of Person for Whose Account the Securities are To Be Sold	ROBIN TOMASELLO
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	12403	246571.64	342184493	09/08/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/05/2026	Restricted Stock Units	Issuer			12403	06/05/2026	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
ROBIN TOMASELLO 444 Castro Street, Suite 400 Mountain View CA 94041	Common	08/06/2026	5467	109799.23

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 06/05/2026 through 08/05/2026.
Date of Notice	09/08/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/09/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Robin Tomasello
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)