CleanSpark (CLSK) investor files Form 144 for 20,524-share RSU-related sale

Rhea-AI Filing Summary

S. Matthew Schultz filed a Form 144 indicating an intent to sell shares of CleanSpark, Inc. common stock under Rule 144. The filing lists 20,524 shares related to the 08/13/2026 vesting of restricted stock units. It also reports that 9,031 shares of common stock were sold on 05/14/2026 during the prior three months.

Key Figures

Shares related to RSU vesting: 20,524 shares Shares sold in prior 3 months: 9,031 shares Proposed sale date reference: 08/13/2026

3 metrics

Shares related to RSU vesting 20,524 shares Common stock tied to vesting of RSUs on 08/13/2026

Shares sold in prior 3 months 9,031 shares Common stock sale on 05/14/2026 reported in the 3‑month history

Proposed sale date reference 08/13/2026 Date associated with vesting of RSUs underlying 20,524 shares

Key Terms

Form 144, Rule 144, vesting of RSUs, restricted stock units

4 terms

Form 144 regulatory

"S. Matthew Schultz filed a Form 144 indicating an intent to sell shares"

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.

Rule 144 regulatory

"intent to sell shares of CleanSpark, Inc. common stock under 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.

vesting of RSUs financial

"Common Stock | 08/13/2026 | Vesting of RSUs | CleanSpark, Inc."

restricted stock units financial

"The filing lists 20,524 shares related to 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.

FAQ

What does the CleanSpark (CLSK) Form 144 filed by S. Matthew Schultz disclose?

The Form 144 discloses that S. Matthew Schultz may sell 20,524 shares of CleanSpark common stock in connection with RSU vesting on 08/13/2026, and reports a prior sale of 9,031 shares on 05/14/2026.

How many CleanSpark (CLSK) shares are covered by the potential Rule 144 sale?

The filing covers a potential sale of 20,524 shares of CleanSpark common stock. These shares are tied to the vesting of RSUs on 08/13/2026, as indicated in the Form 144 securities information section.

What prior CleanSpark (CLSK) stock transactions are reported in this Form 144?

The Form 144 notes that 9,031 shares of CleanSpark common stock were sold on 05/14/2026 during the preceding three months, providing context for the filer’s recent trading activity under Rule 144 reporting requirements.

What is the basis for the 20,524 CleanSpark (CLSK) shares listed in the Form 144?

The 20,524 shares listed relate to the vesting of restricted stock units (RSUs) on 08/13/2026. The Form 144 characterizes the transaction type as “Vesting of RSUs,” linking the planned sale to equity compensation.

Does the CleanSpark (CLSK) Form 144 mean the shares have already been sold?

No. Form 144 is a notice of a proposed sale under Rule 144. It shows that up to 20,524 shares may be sold after RSUs vest on 08/13/2026, and separately discloses a prior sale of 9,031 shares.

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

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Available on EDGAR 08/14/2026 - 08:30 PM Accepted by SEC EDGAR 08/14/2026 - 08:30 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
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 Stock	Siebert Financial Corp. 535 Fifth Avenue, 4th Floor New York NY 10017	9031	104037	256817073	08/14/2026	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	08/13/2026	Vesting of RSUs	CleanSpark, Inc.			20524	08/13/2026	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	05/14/2026	9031	126260

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)