8-K - SLNH - Equibles

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

Dateof Report (Date of earliest event reported): October 9, 2025

SOLUNA

HOLDINGS, INC.

(Exactname of Registrant as Specified in Its Charter)

Nevada	001-40261	14-1462255
(State or Other Jurisdiction<br><br> <br>of Incorporation)	(Commission<br><br> <br>File Number)	(IRS Employer<br><br> <br>Identification No.)
325 Washington Avenue Extension
---	---
Albany, New York	12205
(Address of Principal Executive Offices)	(Zip Code)

Registrant’sTelephone Number, Including Area Code: (516) 216-9257

N/A

(FormerName 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<br> pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant<br> to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications<br> pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications<br> 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<br> $0.001 per share	SLNH	The Nasdaq Stock Market<br> LLC
9.0% Series A Cumulative<br> Perpetual Preferred Stock, par value $0.001 per share	SLNHP	The Nasdaq Stock Market<br> 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. ☐

Item7.01 Regulation FD Disclosure.

On October 9, 2025, Soluna Holdings, Inc. (the “Company”) issued a press release announcing the Company’s new hosting partnership with KULR Technology Group, Inc. for 3.3 MW of Bitcoin mining capacity at its Project Sophie facility in Kentucky. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

Theinformation in Item 7.01 and in Exhibit 99.1 will not be treated as “filed” for the purposes of Section 18 of the SecuritiesExchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. This informationwill 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.

Item9.01 Financial Statements and Exhibits.

(d) Exhibits.

99.1	Press Release, dated October 9, 2025
104	Cover Page Interactive<br> Date 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.
Date: October 9, 2025	By:	/s/ David C. Michaels
		David C. Michaels
		Chief Financial Officer
		(principal financial officer)

Exhibit 99.1

Solunaand KULR Technology Group Announce 3.3 MW Hosting Partnership at Project Sophie

Soluna’s first treasury-focused partnership signals a broadening customer base

ALBANY,NY — October, 9, 2025— Soluna Holdings, Inc. (“Soluna” or the “Company”) (NASDAQ: SLNH), a developer of green data centers for intensive computing applications, today announced a new hosting partnership with KULR Technology Group, Inc. (“KULR”) (NYSE American: KULR), a Bitcoin+ treasury company that builds a portfolio of frontier technology businesses ranging from high-performance energy systems to AI Robotics.

Under this agreement, Soluna will operate approximately 3.3 MW of Bitcoin mining capacity for KULR at its Project Sophie facility in Kentucky. The excitingpartnership marks the first time Soluna has partnered with a Bitcoin treasury-focused company, expanding the Company’s customer base beyond traditional Bitcoin miners and hyperscalers.

“This partnership represents a new chapter in how we serve the market,” said John Belizaire, CEO of Soluna. “Treasury companies like KULR are increasingly seeking sustainable, high-performance computing infrastructure to diversify their digital asset strategies. We’re proud to pioneer a flexible hosting model that meets this evolving demand.”

The agreement reflects Soluna’s strategy to adapt its renewable-powered hosting model to meet the developing demand profiles of Bitcoin mining and adjacent industries.

“This collaboration supports KULR’s commitment to strategic innovation in digital asset management,” said Michael Mo, CEO of KULR Technology Group. “Partnering with Soluna allows us to engage in Bitcoin mining through a renewable, reliable, and operationally efficient framework.” Mo continued, “This is only the beginning. As KULR expands beyond Bitcoin mining and migrates into Battery Backup Unit (‘BBU’) solutions, Soluna stands out as the ideal partner for future projects focused on sustainable, low-cost AI data center hosting powered by stranded renewable energy.”

As per the BBU Market analysis conducted by Custom Market Insights in July 2025, the global BBU Market is expected to grow from 29.22 Billion USD in 2025 to 43.64 Billion USD by 2034.

The 3.3 MW deployment at Project Sophie is expected to commence operations in Q4 2025, further strengthening Soluna’s leadership in sustainable computing infrastructure.

Under the partnership, KULR will leverage Soluna’s operational and market expertise to purchase, service, and manage all activities associated with its fleet of mining hardware over the life of the contract. Through this new “Bitcoin Mining Lease” structure, Soluna will deliver guaranteed hashrate and uptime targets to KULR on a daily and monthly basis.

We believe as more established companies like KULR explore Bitcoin as part of their treasury strategy, Soluna’s model offers a mutually beneficial pathway to guaranteed hashrate without the operational complexity of mining. This partnership supports KULR’s Bitcoin Treasury Accumulation Strategy, announced earlier this year, in which KULR committed up to 90% of its surplus cash reserves to Bitcoin. Through its new hosting framework, Soluna empowers Bitcoin+ companies such as KULR to tap into the benefits of Bitcoin mining while avoiding the common challenges of market volatility and legacy infrastructure constraints.

SafeHarbor Statement by Soluna

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 the Company’s plans, objectives and deliverables, including with respect to its partnership with KULR. The Company 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 the Company’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 press release date, and the Company undertakes no duty to update such information, except as required under applicable law.

AboutSoluna 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 solunacomputing.com and follow us on:

LinkedIn: https://www.linkedin.com/company/solunaholdings/

X (formerly Twitter): x.com/solunaholdings

YouTube: youtube.com/c/solunacomputing

Newsletter: bit.ly/solunasubscribe

Resource Center: solunacomputing.com/resources

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.

AboutKULR Technology Group, Inc.

KULR Technology Group, Inc. (NYSE American: KULR) is a Bitcoin+ Treasury company that builds a portfolio of frontier technology businesses ranging from high-performance energy systems to AI Robotics. KULR delivers cutting-edge energy storage solutions for space, aerospace, and defense by leveraging a foundation of in-house battery design expertise, comprehensive cell and battery testing suite, and battery fabrication and production capabilities. The Company’s offering allows delivery of commercial-off-the-shelf and custom next-generation energy storage systems in rapid timelines for a fraction of the cost compared to traditional programs. Since late 2024, KULR has included bitcoin as a primary asset in its treasury program and committed to allocating up to 90% of its excess cash to the acquisition of bitcoin.

Contact

Public Relations

West of Fairfax for Soluna

Soluna@westof.co

InvestorRelations:

KULR Technology Group, Inc.

Phone: 858-866-8478 x 847

Email: ir@kulr.ai

KULRMedia Relations:

M Group Strategic Communications (on behalf of KULR)

Email: kulr@mgroupsc.com