# EDGAR Filing Document

**Accession Number:** 0000064463
**File Stem:** 0001641172-25-016231
**Filing Date:** 2025-6
**Character Count:** 10823
**Document Hash:** d8e17416a8be6837f899143d9ccdb7d6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001641172-25-016231.hdr.sgml**: 20250624

**ACCESSION NUMBER**: 0001641172-25-016231

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20250624

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250624

**DATE AS OF CHANGE**: 20250624

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Soluna Holdings, Inc
- **CENTRAL INDEX KEY:** 0000064463
- **STANDARD INDUSTRIAL CLASSIFICATION:** FINANCE SERVICES [6199]
- **ORGANIZATION NAME:** 09 Crypto Assets
- **EIN:** 141462255
- **STATE OF INCORPORATION:** NV
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40261
- **FILM NUMBER:** 251066771

**BUSINESS ADDRESS:**
- **STREET 1:** 325 WASHINGTON AVENUE EXTENSION
- **CITY:** ALBANY
- **STATE:** NY
- **ZIP:** 12205
- **BUSINESS PHONE:** 518-218-2500

**MAIL ADDRESS:**
- **STREET 1:** 325 WASHINGTON AVENUE EXTENSION
- **CITY:** ALBANY
- **STATE:** NY
- **ZIP:** 12205

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MECHANICAL TECHNOLOGY INC
- **DATE OF NAME CHANGE:** 19920703

?xml version='1.0' encoding='ASCII'?

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported): June 24, 2025**

**SOLUNA HOLDINGS, INC.**

**(Exact name of Registrant as Specified in Its Charter)**

---

| | | |
|:---|:---|:---|
| **Nevada** | **001-40261** | **14-1462255** |
| **(State or Other Jurisdiction**<br> **of Incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer**<br> **Identification No.)** |

---

---

| | |
|:---|:---|
| **325 Washington Avenue Extension** |  |
| **Albany, New York** | **12205** |
| **(Address of Principal Executive Offices)** | **(Zip Code)** |

---

**Registrant's Telephone Number, Including Area Code: (516) 216-9257**

**N/A**

**(Former Name or Former Address, if Changed Since Last Report)**

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:**

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which registered** |
| Common stock, par value $0.001 per share | SLNH | The Nasdaq Stock Market LLC |
| 9.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share | SLNHP | The Nasdaq Stock Market LLC |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

**Item 7.01** **Regulation FD Disclosure**

On June 24, 2025, Soluna Holdings, Inc. ("Soluna" or the "Company") issued a press release announcing that it has renewed and expanded its long-standing partnership with Compass Mining, with a renewal at Soluna's Project Dorothy 1 site and a major expansion into its adjacent site, Project Dorothy 2, for a total deployment of approximately 13 megawatts (MW) of computing capacity across the two locations. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

*The information in this Item 7.01 of Form 8-K and in Exhibit 99.1 attached hereto will not be treated as "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section. This information will not be incorporated by reference into any filing under the Securities Act of 1933 or into another filing under the Exchange Act, unless that filing expressly incorporates this information by reference.*

**Item 9.01** **Financial Statements and Exhibits**

(d) *Exhibits.*

99.1 [Press Release, dated June 24, 2025](ex99-1.htm) <br> 104 Cover Page Interactive Data File (embedded with the Inline XBRL document)

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **SOLUNA HOLDINGS, INC.** | **SOLUNA HOLDINGS, INC.** |
| Date: June 24, 2025 | By: | */s/ John Tunison* |
|  |  | John Tunison |
|  |  | Chief Financial Officer |
|  |  | (principal financial officer) |

---

## Exhibit 99.1

**Exhibit 99.1**

Soluna Expands Long-Term Partnership with Compass Mining

Expands into Project Dorothy 2, Totaling 13 MW

ALBANY, NY, June 24, 2025 – Soluna Holdings, Inc. ("Soluna" or the "Company"), (NASDAQ: SLNH), a developer of green data centers for intensive computing applications, including Bitcoin mining and AI, today announced the renewal and expansion of its long-standing partnership with Compass Mining.

The expanded agreement includes a contract renewal at Soluna's Project Dorothy 1 site and a major expansion into its adjacent site, Project Dorothy 2, marking a total deployment of approximately 13 megawatts (MW) of computing capacity across the two locations.

Compass Mining has been a valued partner since its first deployment at Project Dorothy 1 in 2023, later transitioning to Project Sophie. With today's announcement, Compass Mining will renew its existing buildings. It will also expand into Project Dorothy 2, Soluna's next-generation site, with an additional 8 MW, bringing its total footprint to approximately 13 MW across the Dorothy campus. With this expansion, Project Dorothy 2, Phase 1, is now full.

"Compass Mining was one of the first to bet on us. Years later, they're still betting on Soluna and scaling with us," said John Belizaire, CEO of Soluna. "This renewal and expansion is a testament to our Relentless Stewardship and the trust we build with every customer. We don't just host. We grow with you."

"Soluna has been a highly reliable partner since Project Dorothy 1, and we're excited to deepen that relationship," said Paul Gosker, CEO of Compass Mining. "This expansion, which lets us staff and operate the new capacity ourselves, aligns perfectly with our strategy to deliver a best-in-class experience for our customers."

Project Dorothy, named after computing pioneer Dorothy Vaughan, is Soluna's flagship site, strategically located in West Texas to consume excess wind energy.

For more information, visit <u>www.solunacomputing.com</u>

Soluna's glossary of terms can be found <u>here</u>.

Safe Harbor Statement

This announcement contains forward-looking statements. These statements are made under the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as "will," "expects," "anticipates," "future," "intends," "plans," "believes," "estimates," "confident" and similar statements. Other examples of forward-looking statements may include, but are not limited to, statements of Soluna's plans and objectives, including with respect to Project Dorothy and our expectations with respect to the amount of renewable energy capacity Project Dorothy will deliver. Soluna may also make written or oral forward-looking statements in its periodic reports to the U.S. Securities and Exchange Commission ("SEC"), in its annual report to shareholders, in press releases and other written materials, and in oral statements made by its officers, directors, or employees to third parties. Statements that are not historical facts, including but not limited to statements about Soluna's beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties, further information regarding which is included in the Company's filings with the SEC. All information provided in this press release is as of the date of the press release, and Soluna Holdings, Inc. undertakes no duty to update such information, except as required under applicable law.

About Soluna Holdings, Inc. (Nasdaq: SLNH)

Soluna is on a mission to make renewable energy a global superpower, using computing as a catalyst. The company designs, develops, and operates digital infrastructure that transforms surplus renewable energy into global computing resources. Soluna's pioneering data centers are strategically co-located with wind, solar, or hydroelectric power plants to support high-performance computing applications, including Bitcoin Mining, Generative AI, and other compute-intensive applications. Soluna's proprietary software MaestroOS(™) helps energize a greener grid while delivering cost-effective and sustainable computing solutions and superior returns. To learn more, visit <u>solunacomputing.com</u> and follow us on:

LinkedIn: <u>https://www.linkedin.com/company/solunaholdings/</u>

X (formerly Twitter): <u>x.com/solunaholdings</u>

YouTube: <u>youtube.com/c/solunacomputing</u>

Newsletter: <u>bit.ly/solunasubscribe</u>

Resource Center: <u>solunacomputing.com/resources</u>

Soluna regularly posts important information on its website and encourages investors and potential investors to consult the Soluna investor relations and investor resources sections of its website regularly.

About Compass Mining

Compass Mining is a customer-first company that provides a platform for individuals and businesses to purchase Bitcoin mining hardware, host machines, build and manage mining facilities, and access a range of ancillary services. With a commitment to exceptional customer support and transparency, Compass Mining sets the benchmark for Bitcoin-mining hosting. Its mission is to make Bitcoin mining accessible to everyone. To learn more about Compass Mining or to start mining today, visit <u>compassmining.io</u>.

Contact Information

Public Relations

West of Fairfax for Soluna

<u>Soluna@westof.co</u>