Soluna director plans sale of 12,037 shares

Director William P. Phelan files a Rule 144 notice to sell 12,037 Soluna common shares after recently selling preferred shares.

Rhea-AI Filing Summary

Soluna Holdings, Inc (SLNH) has a notice that director William P. Phelan intends to sell common stock under Rule 144. The filing lists 12,037 shares of common stock to be sold through Fidelity Brokerage Services LLC on NASDAQ. Shares will be sold from three brokerage and IRA accounts associated with Phelan.

The notice also lists multiple recent preferred stock sales by William Phelan over the past three months, each with specific share amounts and dollar values, indicating ongoing liquidity activity in Soluna securities by this insider.

Key Figures

Common shares to be sold: 12,037 shares Approximate value of common shares: $12,686.94 Preferred shares sold on June 17, 2026: 10,113 shares +4 more

7 metrics

Common shares to be sold 12,037 shares Planned Rule 144 sale of Soluna Holdings, Inc. common stock

Approximate value of common shares $12,686.94 Amount listed with 12,037 common shares in the securities information section

Preferred shares sold on June 17, 2026 10,113 shares Preferred stock sale by William Phelan on June 17, 2026

Value of preferred sale on June 17, 2026 $108,661.79 Dollar amount for 10,113 preferred shares sold June 17, 2026

Preferred shares sold on August 21, 2026 8,843 shares Preferred stock sale by William Phelan on August 21, 2026

Value of preferred sale on August 21, 2026 $108,667.54 Dollar amount for 8,843 preferred shares sold August 21, 2026

Date of notice September 3, 2026 Form 144 notice date for Soluna Holdings, Inc. securities

Key Terms

Rule 144, Form 144, Open Market Purchase, Stock Award, +1 more

5 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.

Form 144 regulatory

"144: Filer Information and 144: Issuer Information sections."

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.

Open Market Purchase financial

"Common | 08/10/2016 | Open Market Purchase | Issuer"

An open market purchase is when a company buys its own shares on public stock exchanges the same way any investor would, rather than through a private deal. Investors care because these purchases reduce the number of shares available, can boost earnings per share and share price, signal that management thinks the stock is undervalued, and use company cash that might otherwise go to reinvestment or dividends — like a business quietly buying back its own tickets at the box office.

Stock Award financial

"Common | 01/14/2020 | Stock Award | Issuer"

attorney-in-fact regulatory

"as attorney-in-fact for William Phelan"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

What does the Form 144 filing for SLNH disclose about planned common stock sales?

The Form 144 notice states that 12,037 shares of Soluna Holdings, Inc. common stock are planned to be sold through Fidelity Brokerage Services LLC, with the securities listed on NASDAQ and the notice dated September 3, 2026.

Who is selling Soluna Holdings (SLNH) shares in this Form 144 filing?

The selling security holder is William P. Phelan, identified as a director of Soluna Holdings, Inc. The notice covers sales for his account, including shares held in several brokerage and IRA accounts.

From which accounts will the 12,037 SLNH common shares be sold?

The remarks state the common shares will be sold from three accounts: CAPITAL MANAGEMENT FBO P PHELAN (2,000 shares), P PHELAN (7,330 shares), and FMT CO CUST IRA ROLLOVER FBO P PHELAN (2,707 shares).

What recent Soluna (SLNH) preferred stock sales by William Phelan are reported?

The filing lists multiple preferred stock sales by William Phelan between June 17, 2026 and August 31, 2026, including transactions such as 10,113 preferred shares on June 17 and 8,843 preferred shares on August 21, each with stated dollar values.

What is the approximate aggregate value shown for the SLNH common shares in this Form 144?

The securities information section shows an amount of $12,686.94 alongside the planned sale of 12,037 common shares of Soluna Holdings, Inc., indicating the approximate aggregate market value for the shares covered by the notice.

Who signed the Soluna (SLNH) Form 144 notice and in what capacity?

The notice is signed by /s/ Christian Nasser as a duly authorized representative of Fidelity Brokerage Services LLC, acting as attorney-in-fact for William Phelan, on the date of notice September 3, 2026.

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

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Available on EDGAR 09/03/2026 - 11:54 AM EDT Accepted by SEC EDGAR 09/03/2026 - 11:54 AM 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
Common	Fidelity Brokerge Services LLC 245 Summer Street Boston MA 02110	12037	12686.94	244590575	09/03/2026	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	08/10/2016	Open Market Purchase	Issuer			400	08/10/2016	Cash/Check
Common	08/24/2016	Open Market Purchase	Issuer			306	08/24/2016	Cash/Check
Common	10/31/2016	Open Market Purchase	Issuer			2821	10/31/2016	Cash/Check
Common	11/01/2016	Open Market Purchase	Issuer			1180	11/01/2016	Cash/Check
Common	01/14/2020	Stock Award	Issuer			700	01/14/2020	Compensation
Common	02/02/2021	Stock Award	Issuer			3090	02/02/2021	Compensation
Common	03/25/2021	Stock Award	Issuer			300	03/25/2021	Compensation
Common	02/01/2023	Stock Award	Issuer			303	02/01/2023	Compensation
Common	02/01/2024	Stock Award	Issuer			799	02/01/2024	Compensation
Common	03/01/2025	Stock Award	Issuer			2138	03/01/2025	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 Ave Albany NY 12205	Preferred	06/17/2026	10113	108661.79
William Phelan 325 Washington Ave Albany NY 12205	Preferred	06/18/2026	4813	52916.41
William Phelan 325 Washington Ave Albany NY 12205	Preferred	06/22/2026	3074	33791.90
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/19/2026	5000	63028.77
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/20/2026	1157	14356.73
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/21/2026	8843	108667.54
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/24/2026	5000	58261.55
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/25/2026	5000	59973.00
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/26/2026	1862	22479.65
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/27/2026	8099	97795.14
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/28/2026	5039	61668.27
William Phelan 325 Washington Ave Albany NY 12205	Preferred	08/31/2026	3188	38492.84

144: Remarks and Signature

Remarks	Shares to be sold out of the following accounts: -CHATHAM CAPITAL MANAGEMENT FBO WILLIAM P PHELAN 2,000 shares -WILLIAM P PHELAN 7,330 shares -FMT CO CUST IRA ROLLOVER FBO WILLIAM P PHELAN 2,707 shares
Date of Notice	09/03/2026
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/ Christian Nasser as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for William Phelan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)