Soluna director sells 13.8K preferred shares

Soluna Holdings, Inc (SLNH) director William P. Phelan reported selling shares of the company’s 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP).

Rhea-AI Filing Summary

Soluna Holdings, Inc (SLNH) director William P. Phelan reported selling shares of the company’s 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP). He sold 5,000 shares at $11.66 per share on August 24, 2026 and 8,843 shares at $12.29 per share on August 21, 2026, all held directly. The filing does not state his post-transaction holdings, and the transactions were not reported as made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Seller: 13,843 shares

Net Sell 2 txns

Insider Phelan William P

Role Director

Sold 13,843 shs ($167K)

Type	Security	Shares	Price	Value
Sale	9.0% Series A Cumulative Perpetual Preferred Stock	5,000	$11.66	$58K
Sale	9.0% Series A Cumulative Perpetual Preferred Stock	8,843	$12.29	$109K

Holdings After Transaction: 9.0% Series A Cumulative Perpetual Preferred Stock — 86,233 shares (Direct)

Key Figures

Shares sold on 2026-08-24: 5,000 shares Shares sold on 2026-08-21: 8,843 shares Total shares sold in reported transactions: 13,843 shares +2 more

5 metrics

Shares sold on 2026-08-24 5,000 shares Sale of 9.0% Series A Cumulative Perpetual Preferred Stock at $11.66 per share

Shares sold on 2026-08-21 8,843 shares Sale of 9.0% Series A Cumulative Perpetual Preferred Stock at $12.29 per share

Total shares sold in reported transactions 13,843 shares Aggregate sellShares in transactionSummary across both reported sales

Price per share on 2026-08-24 $11.66 per share Sale price for 5,000 preferred shares on August 24, 2026

Price per share on 2026-08-21 $12.29 per share Sale price for 8,843 preferred shares on August 21, 2026

Key Terms

9.0% Series A Cumulative Perpetual Preferred Stock, Cumulative Perpetual Preferred Stock, Sale in open market or private transaction

3 terms

9.0% Series A Cumulative Perpetual Preferred Stock financial

"Security title: 9.0% Series A Cumulative Perpetual Preferred Stock"

Cumulative Perpetual Preferred Stock financial

"9.0% Series A Cumulative Perpetual Preferred Stock"

A cumulative perpetual preferred stock is a share that acts like a long-lasting hybrid between a bond and a dividend-paying stock: it promises regular fixed payments that, if missed, accumulate and must be paid later before common shareholders get dividends, and it has no set maturity date. Investors care because it can provide steady, higher-priority income similar to interest, but with limited capital upside, sensitivity to interest rates, and the risk that payments can be delayed even though they continue to accrue.

Sale in open market or private transaction financial

"transaction_code_description: Sale in open market or private transaction"

FAQ

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

What did Soluna Holdings (SLNH) director William P. Phelan report on this Form 4?

He reported two sales of Soluna Holdings’ 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP), totaling 13,843 shares, executed in open market or private transactions on August 21 and 24, 2026, from his direct holdings.

How many Soluna Holdings (SLNH) preferred shares did William P. Phelan sell and at what prices?

He sold 5,000 shares at $11.66 per share on August 24, 2026 and 8,843 shares at $12.29 per share on August 21, 2026, all in the 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP).

Which security of Soluna Holdings (SLNH) was involved in William P. Phelan’s reported transactions?

All transactions involved Soluna Holdings’ 9.0% Series A Cumulative Perpetual Preferred Stock, designated as SLNHP. Both reported trades were sales of this non-derivative preferred equity security held directly by William P. Phelan.

Were William P. Phelan’s sales of Soluna Holdings (SLNH) preferred stock under a Rule 10b5-1 plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox as false, meaning the reported transactions were not affirmed as made under a Rule 10b5-1 trading plan.

Does the Form 4 state William P. Phelan’s remaining holdings of Soluna Holdings (SLNH) preferred stock?

No. For both reported sales, the field for total shares following the transaction is blank, so the filing does not disclose William P. Phelan’s remaining holdings of the preferred shares.

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

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Available on EDGAR 08/25/2026 - 04:31 PM EDT Accepted by SEC EDGAR 08/25/2026 - 04:30 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Phelan William P

(Last) (First) (Middle)

C/O SOLUNA HOLDINGS, INC.

325 WASHINGTON AVENUE EXTENSION

(Street)

ALBANY NEW YORK 12205

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Soluna Holdings, Inc [ SLNHP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/21/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
9.0% Series A Cumulative Perpetual Preferred Stock	08/21/2026		S		8,843	D	$12.29	91,233	D
9.0% Series A Cumulative Perpetual Preferred Stock	08/24/2026		S		5,000	D	$11.66	86,233	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Christopher Gandolfo, Attorney in Fact	08/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)