Rule 144 filing shows STX (NASDAQ: STX) insider sale plans in 2026

Rhea-AI Filing Summary

An affiliated shareholder has filed a Rule 144 notice to sell up to 1,412 shares of common stock through Morgan Stanley Smith Barney LLC on or around 01/12/2026, with an indicated aggregate market value of 422,625.72. The filing notes that these shares were acquired on 01/12/2026 via a stock option exercise from the issuer, paid in cash.

The notice also reports prior sales of the issuer’s common stock by the same person over the past three months, including 6,000 shares sold on 11/05/2025 for gross proceeds of 1,620,000.00, 2,010 shares sold on 12/11/2025 for 594,759.00, 1,412 shares sold on 11/11/2025 for 408,039.76, and 1,410 shares sold on 10/13/2025 for 318,039.60. The issuer’s common shares outstanding are listed as 213,558,113.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	1412	422625.72	213558113	01/12/2026	NASDAQ

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	01/12/2026	Stock Option Exercise	ISSUER			1412	01/12/2026	Cash

* 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
BAN SENG TEH 121 Woodlands Avenue 5 Singapore U0 739009	Common	12/11/2025	2010	594759.00
BAN SENG TEH 121 Woodlands Avenue 5 Singapore U0 739009	Common	11/11/2025	1412	408039.76
BAN SENG TEH 121 Woodlands Avenue 5 Singapore U0 739009	Common	11/05/2025	6000	1620000.00
BAN SENG TEH 121 Woodlands Avenue 5 Singapore U0 739009	Common	10/13/2025	1410	318039.60

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

How many STX shares are planned for sale under this Rule 144 notice?

The Rule 144 notice covers a planned sale of 1,412 shares of common stock through Morgan Stanley Smith Barney LLC.

When were the STX shares to be sold under Rule 144 acquired and how?

The 1,412 shares to be sold were acquired on 01/12/2026 via a stock option exercise from the issuer, with payment made in cash.

What is the reported market value of the STX shares covered by this Form 144?

The notice lists an aggregate market value of 422,625.72 for the 1,412 shares of common stock to be sold.

What recent STX insider sales are disclosed in this Rule 144 filing?

The filing discloses several recent sales of common stock by the same person: 6,000 shares on 11/05/2025 for 1,620,000.00, 2,010 shares on 12/11/2025 for 594,759.00, 1,412 shares on 11/11/2025 for 408,039.76, and 1,410 shares on 10/13/2025 for 318,039.60.

Who is the selling security holder identified in the STX Form 144?

The selling security holder listed is BAN SENG TEH, with an address at 121 Woodlands Avenue 5, Singapore 739009.

How many STX common shares are outstanding according to this Rule 144 notice?

The notice states that the number of common shares outstanding is 213,558,113.