Siebert Financial (CLSK) Form 144: Affiliate Resale Notice

Siebert Financial Corp. (CLSK) filing a Form 144 notice reporting proposed resale activity by an affiliate.

Rhea-AI Filing Summary

Siebert Financial Corp. (CLSK) filing a Form 144 notice reporting proposed resale activity by an affiliate. The excerpt lists Common Stock and an item described as Vesting of RSUs dated 05/13/2026. Several share counts appear in the excerpt: 20,525 shares, 83,385 shares, 95,095 shares, and 879,952 shares.

The filing is administrative: it provides issuer and securities details and lists a reporting party, S. Matthew Schultz, with addresses and past sale dates including 02/18/2026. The excerpt does not state prices, intended method of sale, or proceeds treatment.

Insights

Securities Compliance Counsel

Form 144 notice documents proposed affiliate resale of common stock.

The excerpt lists a proposed sale related to Common Stock and a Vesting of RSUs dated 05/13/2026. Form 144s are procedural filings that notify the SEC of an affiliate's intent to sell restricted or control securities under Rule 144.

Timing, pricing, and distribution method are not shown in the excerpt; subsequent trade reports or a Form 4/5 would disclose execution details. Cash‑flow treatment is not stated in the provided text.

Key Figures

Form type: Form 144 RSU vesting date: 05/13/2026 Share example: 20,525 shares +3 more

6 metrics

Form type Form 144 resale notice for affiliates

RSU vesting date 05/13/2026 Vesting of RSUs referenced in the excerpt

Share example 20,525 shares listed near Vesting of RSUs

Share example 83,385 shares listed under Securities Sold During The Past 3 Months

Share example 95,095 shares listed under Securities Sold During The Past 3 Months

Share example 879,952 shares appears in the excerpt without an explicit label

Key Terms

Form 144, RSUs, Vesting of RSUs

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

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.

RSUs financial

"Vesting of RSUs | CleanSpark, Inc."

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

Vesting of RSUs financial

"05/13/2026 | Vesting of RSUs"

FAQ

What does Siebert Financial Corp.'s (CLSK) Form 144 report?

The Form 144 reports a proposed resale by an affiliate of Common Stock and notes a Vesting of RSUs dated 05/13/2026. It lists share counts and a reporting person but does not state sale price or execution details.

Who is the reporting party on the CLSK Form 144 excerpt?

The excerpt shows S. Matthew Schultz as a reporting party with an address in Henderson, NV. The filing lists prior sale dates including 02/18/2026, but does not state Schultz's post‑transaction holdings.

Does the excerpt state how many shares are being offered for resale?

The excerpt includes multiple share figures such as 20,525, 83,385, 95,095, and 879,952. The document does not explicitly label a single aggregate "offered" amount in the provided text.

Will this Form 144 tell me how much cash the issuer receives from sales?

No. The excerpt does not state pricing or proceeds. Form 144s notify intent to sell restricted/control securities; they do not by themselves disclose sale proceeds or settlement details.

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

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Accepted by SEC EDGAR 05/14/2026 - 09:40 PM Learn about SEC filing dates

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	0001625587
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	CLEANSPARK, INC.
SEC File Number	001-39187
Address of Issuer	10624 S. Eastern Ave. Suite A - 638 Henderson NEVADA 89052
Phone	(702)-989-7692
Name of Person for Whose Account the Securities are To Be Sold	Schultz S. Matthew
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
Relationship to Issuer	Director

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 Stock	Siebert Financial Corp. 535 Fifth Avenue, 4th Floor New York NY 10017	9031	120112	256633949	05/14/2026	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 Stock	05/13/2026	Vesting of RSUs	CleanSpark, Inc.			20525	05/13/2026	N/A - Vesting of RSUs

* 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
S. Matthew Schultz 10624 S. Eastern Ave. Suite A-638 Henderson NV 89052	Common Stock	02/18/2026	9031	83385
S. Matthew Schultz 10624 S. Eastern Ave. Suite A-638 Henderson NV 89052	Common Stock	02/18/2026	95095	879952

144: Remarks and Signature

Remarks	Reflects shares sold to cover the Reporting Person's tax liability in connection with the vesting and settlement of RSUs.
Date of Notice	05/14/2026
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/ S. Matthew Schultz
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)