Form 144 sale notices at STX (insider sales and RSU vesting)

Rhea-AI Filing Summary

Form 144 filing reports insider sales and an RSU vesting. The filing lists three sales by the reporting person on 04/01/2026 (20,000 shares for $8,414,638.00), 05/20/2026 (30,000 shares for $22,538,568.00), and 06/10/2026 (30,000 shares for $27,347,823.00). The filing also records 5,230 shares from Restricted Stock Unit Vesting on 06/10/2026 as Compensation for Service.

Insights

Securities Counsel

Rule 144 notice documents affiliate sales and an RSU vesting.

The filing supplies transaction dates and gross proceeds for three sell events: $8,414,638.00, $22,538,568.00, and $27,347,823.00. It also lists 5,230 shares issued on vesting as Compensation for Service.

These disclosures are administrative under resale rules; cash‑flow recipients are the selling holder(s). Subsequent public trading or additional filings would show whether these were open‑market dispositions or related to cashless exercises.

Key Figures

Sale on 04/01/2026: 20,000 shares Proceeds on 04/01/2026: $8,414,638.00 Sale on 05/20/2026: 30,000 shares +4 more

7 metrics

Sale on 04/01/2026 20,000 shares sale date

Proceeds on 04/01/2026 $8,414,638.00 associated with 20,000 shares

Sale on 05/20/2026 30,000 shares sale date

Proceeds on 05/20/2026 $22,538,568.00 associated with 30,000 shares

Sale on 06/10/2026 30,000 shares sale date

Proceeds on 06/10/2026 $27,347,823.00 associated with 30,000 shares

RSU Vesting 5,230 shares Restricted Stock Unit Vesting on 06/10/2026

Key Terms

Restricted Stock Unit Vesting, Compensation for Service, Form 144

3 terms

Restricted Stock Unit Vesting financial

"Common | 06/10/2026 | Restricted Stock Unit Vesting"

Compensation for Service financial

"5230 | 06/10/2026 | Compensation for Service"

Form 144 regulatory

"CONTENT METADATA: "form_type": "144""

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

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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
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

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	2855	2503178.35	224228992	06/10/2026	NASDAQGS

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	06/10/2026	Restricted Stock Unit Vesting	Issuer			5230	06/10/2026	Compensation for Service

* 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
William Mosley 32932 Pacific Coast Hwy,14-476 Dana Point CA 92629	Common	04/01/2026	20000	8414638.00
William Mosley 32932 Pacific Coast Hwy,14-476 Dana Point CA 92629	Common	05/20/2026	30000	22538568.00
William Mosley 32932 Pacific Coast Hwy,14-476 Dana Point CA 92629	Common	06/10/2026	30000	27347823.00

144: Remarks and Signature

Remarks

Date of Notice

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

What transactions does the STX Form 144 report show?

The filing shows three sales: 20,000 shares on 04/01/2026, 30,000 on 05/20/2026, and 30,000 on 06/10/2026, with gross amounts of $8,414,638.00, $22,538,568.00, and $27,347,823.00, respectively.

Does the filing report any equity issued as compensation for STX?

Yes. The filing records 5,230 shares from Restricted Stock Unit Vesting on 06/10/2026 and labels the reason as Compensation for Service.

Who appears to have sold shares in the Form 144 filing?

The selling party named in the excerpt is William Mosley with an address listed; the three recorded sale dates and amounts are associated with that reporting person in the filing excerpt.

Do the amounts listed represent gross proceeds or net amounts?

The filing provides numeric values alongside each sale line; these figures are presented in the excerpt as amounts ($8,414,638.00; $22,538,568.00; $27,347,823.00). The filing does not separately label them as net or gross proceeds in the provided excerpt.

Does the Form 144 indicate the method of sale?

The provided excerpt lists sale dates, share counts, and amounts but does not specify the sale method (e.g., open‑market, block trade) or attach limiting qualifiers in the visible lines.