Soluna director plans $539K preferred share sale

Soluna Holdings, Inc (SLNH) has a director, William Phelan, filing a notice of proposed sale of 43,188 shares of preferred stock under Rule 144.

Rhea-AI Filing Summary

Soluna Holdings, Inc (SLNH) has a director, William Phelan, filing a notice of proposed sale of 43,188 shares of preferred stock under Rule 144. The securities are held at Charles Schwab and have an aggregate market value of $539,418.12, with 244,590,575 preferred shares outstanding as context.

The preferred shares to be sold were acquired on 06/01/2026 from the issuer as a stock grant categorized as equity compensation. In the preceding three months, William Phelan reported Rule 144 sales of preferred stock on 06/17/2026 (10,113 shares for $108,661.79), 06/18/2026 (4,813 shares for $52,916.41), and 06/22/2026 (3,074 shares for $33,791.90).

Key Figures

Preferred shares to be sold: 43,188 shares Aggregate market value of securities: $539,418.12 Preferred shares outstanding: 244,590,575 shares +5 more

8 metrics

Preferred shares to be sold 43,188 shares Planned sale under Rule 144 by director William Phelan

Aggregate market value of securities $539,418.12 Value of 43,188 preferred shares covered by the notice

Preferred shares outstanding 244,590,575 shares Outstanding preferred stock of Soluna Holdings, Inc

Sale on 06/17/2026 10,113 shares for $108,661.79 Preferred stock sold by William Phelan in prior 3 months

Sale on 06/18/2026 4,813 shares for $52,916.41 Preferred stock sold by William Phelan in prior 3 months

Sale on 06/22/2026 3,074 shares for $33,791.90 Preferred stock sold by William Phelan in prior 3 months

Acquisition date of grant 06/01/2026 Date preferred stock was granted as equity compensation

Rule 144 filing date 08/19/2026 Date William Phelan signed the Form 144 notice

Key Terms

Rule 144, Preferred Stock, Stock Grant, Equity Compensation

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of 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.

Preferred Stock financial

"Preferred Stock | Charles Schwab Corp. 3000 Schwab Way Westlake"

Preferred stock is a type of ownership in a company that typically offers investors higher and more consistent dividend payments than common stock. Unlike regular shares, preferred stock usually doesn’t come with voting rights but provides a priority claim on the company’s assets and profits, making it a more stable and predictable investment option. This makes preferred stock attractive to those seeking steady income with lower risk.

Stock Grant financial

"Preferred Stock | 06/01/2026 | Stock Grant | Issuer"

A stock grant is an award of company shares given to an individual, often as part of compensation for employees or executives. It matters to investors because grants can change the number of shares outstanding (dilution) and signal how company leaders are being paid and motivated—think of it like receiving a slice of the company as part of your paycheck, which can affect ownership and future share supply.

Equity Compensation financial

"06/01/2026 | Equity Compensation"

Equity compensation is pay given to employees, executives or contractors in the form of company ownership—such as stock, stock options or restricted shares—rather than just cash. It matters to investors because it can align workers' incentives with shareholders (like paying someone in slices of the same pie they help grow), but it also increases the number of shares outstanding and company expenses, affecting ownership percentages and earnings per share.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose about Soluna Holdings, Inc (SLNH)?

The filing discloses that director William Phelan intends to sell 43,188 preferred shares of Soluna Holdings, Inc under Rule 144, representing stock granted as equity compensation and held at Charles Schwab.

How many Soluna Holdings (SLNH) preferred shares is William Phelan planning to sell?

William Phelan is planning to sell 43,188 shares of preferred stock. These shares were received from Soluna Holdings, Inc on 06/01/2026 as a stock grant classified as equity compensation.

What is the aggregate market value of the Soluna Holdings (SLNH) preferred shares covered by this notice?

The aggregate market value of the preferred shares covered is $539,418.12. This value corresponds to the 43,188 preferred shares referenced in the filing, held in an account at Charles Schwab.

How many Soluna Holdings (SLNH) preferred shares are outstanding according to the filing?

The filing states that there are 244,590,575 preferred shares outstanding. This figure provides context for the planned sale of 43,188 shares by director William Phelan under Rule 144.

What recent sales of Soluna Holdings (SLNH) preferred stock has William Phelan reported?

In the past three months, Phelan reported selling 10,113 shares for $108,661.79 on 06/17/2026, 4,813 shares for $52,916.41 on 06/18/2026, and 3,074 shares for $33,791.90 on 06/22/2026.

How did William Phelan acquire the Soluna Holdings (SLNH) preferred shares he plans to sell?

The preferred shares were acquired on 06/01/2026 directly from Soluna Holdings, Inc as a stock grant. The filing classifies this issuance as equity compensation to director William Phelan.

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

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Available on EDGAR 08/19/2026 - 02:31 PM EDT Accepted by SEC EDGAR 08/19/2026 - 02:31 PM EDT 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	0001311899
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	Soluna Holdings, Inc
SEC File Number	001-40261
Address of Issuer	325 WASHINGTON AVENUE EXTENSION ALBANY NEW YORK 12205
Phone	518-218-2500
Name of Person for Whose Account the Securities are To Be Sold	Phelan William P
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	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
Preferred Stock	Charles Schwab Corp. 3000 Schwab Way Westlake TX 76262	43188	539418.12	244590575	08/19/2026	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 *
Preferred Stock	06/01/2026	Stock Grant	Issuer			43188	06/01/2026	Equity Compensation

* 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 Phelan 325 WASHINGTON AVENUE EXTENSION, ALBANY NY 12205	Preferred Stock	06/17/2026	10113	108661.79
William Phelan 325 WASHINGTON AVENUE EXTENSION, ALBANY NY 12205	Preferred Stock	06/18/2026	4813	52916.41
William Phelan 325 WASHINGTON AVENUE EXTENSION ALBANY NY 12205	Preferred Stock	06/22/2026	3074	33791.90

144: Remarks and Signature

Remarks
Date of Notice	08/19/2026
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	William Phelan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)