Soluna Holdings (SLNH) HR chief exits 9.0% Series A preferred stake

Rhea-AI Filing Summary

Soluna Holdings, Inc Chief People Officer Mary Jennifer O'Reilly reported selling all of her holdings of the company’s 9.0% Series A Cumulative Perpetual Preferred Stock. She executed two open-market sales totaling 6,800 shares on June 10 and 11, 2026 at prices of $10.80 and $11.10 per share. Following these transactions, she directly owns 0 shares of this preferred stock.

Insider Trade Summary

Net Seller: 6,800 shares ($73,761)

Net Sell 2 txns

Insider OReilly Mary Jennifer

Role Chief People Officer

Sold 6,800 shs ($74K)

Type	Security	Shares	Price	Value
Sale	9.0% Series A Cumulative Perpetual Preferred Stock	1,071	$11.10	$12K
Sale	9.0% Series A Cumulative Perpetual Preferred Stock	5,729	$10.80	$62K

Holdings After Transaction: 9.0% Series A Cumulative Perpetual Preferred Stock — 0 shares (Direct, null)

Footnotes (1)

Key Figures

Total preferred shares sold: 6,800 shares Shares sold on 2026-06-10: 5,729 shares at $10.80/share Shares sold on 2026-06-11: 1,071 shares at $11.10/share +1 more

4 metrics

Total preferred shares sold 6,800 shares Net sell shares reported in Form 4 transactionSummary

Shares sold on 2026-06-10 5,729 shares at $10.80/share Open-market sale of 9.0% Series A preferred stock

Shares sold on 2026-06-11 1,071 shares at $11.10/share Open-market sale of 9.0% Series A preferred stock

Holdings after transactions 0 shares Total 9.0% Series A preferred stock directly owned after sales

Key Terms

9.0% Series A Cumulative Perpetual Preferred Stock, open-market sale, non-derivative, Form 4

4 terms

9.0% Series A Cumulative Perpetual Preferred Stock financial

"Transactions involved 9.0% Series A Cumulative Perpetual Preferred Stock as a non-derivative security."

open-market sale financial

"Each transaction is classified as an open-market sale of preferred shares."

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

"The preferred stock transactions are reported as non-derivative securities."

Form 4 regulatory

"The insider transactions are disclosed on a Form 4 filing."

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.

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Form 4 Insider Transactions: What Each Field Means →

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^*

OReilly Mary Jennifer

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/10/2026

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	06/10/2026		S		5,729	D	$10.8	1,071	D
9.0% Series A Cumulative Perpetual Preferred Stock	06/11/2026		S		1,071	D	$11.1	0	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	06/12/2026
	** 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)

FAQ

What did Soluna Holdings (SLNH) insider Mary Jennifer O'Reilly report on this Form 4?

Mary Jennifer O'Reilly reported selling all her 9.0% Series A Cumulative Perpetual Preferred Stock. The Form 4 shows two open-market sales totaling 6,800 preferred shares, reducing her direct holdings of this security to zero after the transactions.

How many Soluna Holdings preferred shares did Mary Jennifer O'Reilly sell?

She sold a total of 6,800 shares of 9.0% Series A Cumulative Perpetual Preferred Stock. The filing reports 5,729 shares sold in one transaction and 1,071 shares in another, both classified as open-market sales of non-derivative securities.

At what prices were Soluna Holdings (SLNH) preferred shares sold in this insider transaction?

The reported sales occurred at prices of $10.80 and $11.10 per share. One transaction covered 5,729 preferred shares at $10.80, and the other covered 1,071 preferred shares at $11.10, both labeled as open-market sales.

What is Mary Jennifer O'Reilly’s remaining position in Soluna Holdings preferred stock after these trades?

After the reported transactions, her direct holdings of the 9.0% Series A Cumulative Perpetual Preferred Stock are zero shares. Each line item in the Form 4 lists total shares following transaction, ending with no remaining preferred shares.

What type of security was involved in Mary Jennifer O'Reilly’s Soluna Holdings Form 4 filing?

The transactions involved Soluna Holdings’ 9.0% Series A Cumulative Perpetual Preferred Stock. This is reported as a non-derivative security, meaning the trades were directly in the preferred shares rather than in options or other derivatives.