Soluna director sells 8,227 preferred shares

Soluna Holdings, Inc (SLNH) director William P. Phelan reported open‑market sales of the company’s 9.0% Series A Cumulative Perpetual Preferred Stock (ticker SLNHP).

Rhea-AI Filing Summary

Soluna Holdings, Inc (SLNH) director William P. Phelan reported open‑market sales of the company’s 9.0% Series A Cumulative Perpetual Preferred Stock (ticker SLNHP). He sold 5,039 shares at $12.25 on August 28, 2026 and 3,188 shares at $12.08 on August 31, 2026, for total reported sales of 8,227 preferred shares. The filing indicates these transactions were not made pursuant to a Rule 10b5‑1 trading plan.

Insider Trade Summary

Net Seller: 8,227 shares

Net Sell 2 txns

Insider Phelan William P

Role Director

Sold 8,227 shs ($100K)

Type	Security	Shares	Price	Value
Sale	9.0% Series A Cumulative Perpetual Preferred Stock	3,188	$12.08	$39K
Sale	9.0% Series A Cumulative Perpetual Preferred Stock	5,039	$12.25	$62K

Holdings After Transaction: 9.0% Series A Cumulative Perpetual Preferred Stock — 63,045 shares (Direct)

Key Figures

Preferred shares sold: 8,227 shares Shares sold on 2026-08-28: 5,039 shares at $12.25 per share Shares sold on 2026-08-31: 3,188 shares at $12.08 per share +1 more

4 metrics

Preferred shares sold 8,227 shares Total 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP) sold by director

Shares sold on 2026-08-28 5,039 shares at $12.25 per share Sale of SLNHP on August 28, 2026

Shares sold on 2026-08-31 3,188 shares at $12.08 per share Sale of SLNHP on August 31, 2026

Net buy/sell shares -8,227 shares Transaction summary shows net-sell direction for reported period

Key Terms

9.0% Series A Cumulative Perpetual Preferred Stock, Rule 10b5-1 trading plan, 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"

Rule 10b5-1 trading plan regulatory

"aff_10b5_one is the filing's document-level Rule 10b5-1 checkbox"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

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.

Who is the insider trading Soluna Holdings (SLNH) preferred stock in this Form 4?

The Form 4 reports transactions by William P. Phelan, a director of Soluna Holdings, Inc., involving the company’s 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP).

What securities of Soluna Holdings (SLNH) were sold in this Form 4?

The reported transactions involve 9.0% Series A Cumulative Perpetual Preferred Stock of Soluna Holdings, Inc., which trades under ticker SLNHP.

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

William P. Phelan reported selling a total of 8,227 shares of Soluna Holdings’ 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP), consisting of 5,039 shares on August 28, 2026 and 3,188 shares on August 31, 2026.

At what prices were the Soluna Holdings (SLNH) preferred shares sold?

On August 28, 2026, 5,039 shares of SLNHP were sold at $12.25 per share. On August 31, 2026, 3,188 shares were sold at $12.08 per share, both described as sales in open market or private transactions.

Were the Soluna Holdings (SLNH) insider sales under a Rule 10b5-1 plan?

No. The Form 4 indicates, via the Rule 10b5‑1 checkbox (aff_10b5_one = false), that the reported transactions in SLNHP were not effected pursuant to a Rule 10b5‑1 trading plan.

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

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Available on EDGAR 09/01/2026 - 04:31 PM EDT Accepted by SEC EDGAR 09/01/2026 - 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)
08/28/2026

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	08/28/2026		S		5,039	D	$12.25	66,233	D
9.0% Series A Cumulative Perpetual Preferred Stock	08/31/2026		S		3,188	D	$12.08	63,045	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	09/01/2026
	** 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)