SDST (Nasdaq) RSU vesting 91,636 units; director sold 3,457 shares

Rhea-AI Filing Summary

SDST — Notice of proposed sale under Rule 144 and related issuer activity. The excerpt lists a Restricted Stock Unit (RSU) grant vesting event dated 05/15/2026 with 91,636 units shown and a cash election dated 05/19/2026. It also records a reported sale of 3,457 common shares by Chris Celano on 03/20/2026 for $8,022.00. The securities are identified as Common stock traded on Nasdaq.

Insights

Corporate Actions Analyst

Routine Rule 144 filing showing an RSU vesting and a small past sale.

The excerpt documents an RSU vest dated 05/15/2026 for 91,636 units with a cash treatment noted on 05/19/2026. It separately lists a reported sale of 3,457 shares by an individual on 03/20/2026 for $8,022.00.

These items are procedural disclosures regarding share issuance and a past disposition; cash‑flow treatment and any holding‑period or resale limitations are not detailed in the provided excerpt. Subsequent filings or the full Rule 144 notice may supply transferability or broker details.

Key Figures

RSU vesting: 91,636 units RSU cash treatment date: 05/19/2026 Insider sale shares: 3,457 shares +2 more

5 metrics

RSU vesting 91,636 units RSU Grant Vest dated <date>05/15/2026</date>

RSU cash treatment date 05/19/2026 Cash election recorded for RSU vest

Insider sale shares 3,457 shares Sale by Chris Celano on <date>03/20/2026</date>

Proceeds reported $8,022.00 Proceeds shown for the 03/20/2026 sale

Market Nasdaq Trading venue listed for the common stock

Key Terms

RSU Grant Vest, Rule 144, Cash election

3 terms

RSU Grant Vest financial

"Common | 05/15/2026 | RSU Grant Vest | Issuer"

Rule 144 regulatory

"Filer Information | 144: Filer Information"

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.

Cash election financial

"91636 | 05/19/2026 | Cash"

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	Raymond James & Associates, Inc. 880 Carillon Parkway St. Petersburg FL 33716	25975	53300.70	10580000	05/19/2026	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	05/15/2026	RSU Grant Vest	Issuer			91636	05/19/2026	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
Chris Celano 13406 Kingsride Lane Houston TX 77079	Common	03/20/2026	3457	8022.00

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 does the RSU vesting entry mean for SDST?

It records an RSU grant vest of 91,636 units dated 05/15/2026. This line shows units became payable and a cash election was recorded on 05/19/2026 by the issuer.

Who sold shares recently according to the filing?

The excerpt reports Chris Celano sold 3,457 common shares on 03/20/2026. The sale is shown with a proceeds value of $8,022.00 in the provided lines.

Are these securities listed and where are they traded?

The securities are identified as Common stock and the excerpt lists Nasdaq as the trading market. No ticker‑specific trading volumes or prices are provided in the excerpt.

Does this filing state how proceeds are treated?

The excerpt notes a cash treatment for the RSU vesting on 05/19/2026. No additional details about how cash proceeds will be used are included in the provided lines.

Is the RSU amount registered for resale under Rule 144?

The excerpt lists an RSU vest and a Rule 144 filing context but does not state registration mechanics. The lines show 91,636 units vesting; resale mechanics are not detailed here.