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  4. [Form 4] Soluna Holdings, Inc Insider Trading Activity

Soluna Holdings (SLNH) director sells 6,157 preferred shares

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Soluna Holdings, Inc (SLNH) director William P. Phelan reported selling a total of 6,157 shares of the company’s 9.0% Series A Cumulative Perpetual Preferred Stock. The sales occurred on August 19, 2026 (5,000 shares at $12.61) and August 20, 2026 (1,157 shares at $12.45) in open market or private transactions.

Positive

  • None.

Negative

  • None.
Insider Phelan William P
Role Director
Sold 6,157 shs ($77K)
Type Security Shares Price Value
Sale 9.0% Series A Cumulative Perpetual Preferred Stock 1,157 $12.45 $14K
Sale 9.0% Series A Cumulative Perpetual Preferred Stock 5,000 $12.61 $63K
Holdings After Transaction: 9.0% Series A Cumulative Perpetual Preferred Stock — 100,076 shares (Direct)
Shares sold on 2026-08-19 5,000 shares Sale of 9.0% Series A Cumulative Perpetual Preferred Stock by director
Price on 2026-08-19 $12.61 per share Sale price for 5,000 preferred shares
Shares sold on 2026-08-20 1,157 shares Sale of 9.0% Series A Cumulative Perpetual Preferred Stock by director
Price on 2026-08-20 $12.45 per share Sale price for 1,157 preferred shares
Total shares sold 6,157 shares Combined preferred stock sales reported in this Form 4
9.0% Series A Cumulative Perpetual Preferred Stock financial
"security_title: "9.0% Series A Cumulative Perpetual Preferred Stock""
Form 4 regulatory
"INSIDER FILING DATA (Form 4)"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
open market or private transaction financial
"transaction_code_description: "Sale in open market or private transaction""

FAQ

What insider transaction did SLNH report in this Form 4?
The Form 4 reports that director William P. Phelan sold a total of 6,157 shares of Soluna Holdings, Inc’s 9.0% Series A Cumulative Perpetual Preferred Stock in two transactions on August 19 and 20, 2026.

How many SLNHP preferred shares did William P. Phelan sell and on what dates?
William P. Phelan sold 5,000 shares on August 19, 2026 and 1,157 shares on August 20, 2026, for a combined total of 6,157 preferred shares of Soluna Holdings, Inc.

At what prices were the SLNHP preferred shares sold by the Soluna director?
The reported sales of Soluna’s 9.0% Series A Cumulative Perpetual Preferred Stock were executed at $12.61 per share on August 19, 2026, and $12.45 per share on August 20, 2026, in open market or private transactions.

What type of security did the SLNH insider sell in this filing?
Director William P. Phelan sold shares of Soluna Holdings, Inc’s 9.0% Series A Cumulative Perpetual Preferred Stock, a preferred equity security that pays a stated 9.0% cumulative dividend and is described as perpetual.

Was the Soluna (SLNH) insider sale under a Rule 10b5-1 trading plan?
The filing’s Rule 10b5-1 checkbox is not checked, and no footnote indicates a trading plan, so these reported sales of Soluna’s preferred stock are not stated to have been made pursuant to a Rule 10b5-1 plan.

What is William P. Phelan’s role at Soluna Holdings, Inc (SLNH)?
The Form 4 identifies William P. Phelan as a director of Soluna Holdings, Inc. He is not listed in the filing as an officer or ten percent owner; the reported transactions relate to his role as a director insider.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/19/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
9.0% Series A Cumulative Perpetual Preferred Stock08/19/2026S5,000D$12.61101,233D
9.0% Series A Cumulative Perpetual Preferred Stock08/20/2026S1,157D$12.45100,076D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/ Christopher Gandolfo, Attorney in Fact08/21/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR