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): April 9, 2026

SOLUNA HOLDINGS, INC.

(Exact name of Registrant as Specified in Its Charter)

Nevada

001-40261

14-1462255

(State or Other Jurisdiction

of Incorporation)

(Commission

File Number)

(IRS Employer

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 April 9, 2026, Soluna Holdings, Inc. (the “Company”) issued a press release containing certain previously unreported corporate and operational information which the Company publishes regularly to its website. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

The information in Item 7.01 and in Exhibit 99.1 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 April 9, 2026

104		Cover Page Interactive 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: April 9, 2026	By:	/s/ Michael Picchi
		Michael Picchi
		Chief Financial Officer
		(principal financial officer)

Exhibit 99.1

Soluna Announces Monthly Business Update

ALBANY, NY, April 9, 2026 – Soluna Holdings, Inc. (“Soluna” or the “Company”) (NASDAQ: SLNH), a developer of green data centers for intensive computing applications, including Bitcoin mining and AI, announced its March 2026 project site-level operations, developments, and updates.

The Company has provided the following Corporate and Site Updates.

Key Company Metrics:

The monthly metrics are now available here.

Corporate Highlights:

	●	Soluna Reports Record 2025 Growth: Pipeline Hits 4.3GW, Raises $142 Million, and Launches AI Infrastructure

	●	CEO John Belizaire hosts Metrobloks CEO Ernest Popescu on Soluna’s Clean Integration Podcast to discuss AI infrastructure and Project Kati 2.

	●	New AMA answers investors’ and community questions about Soluna’s financing strategy and project pipeline.

	●	Soluna names KPMG, LLP as the new independent registered public accounting firm for the fiscal year ended December 31, 2026. See Form 8-K for more information.

Key Project Updates:

Project Dorothy 1A (25 MW, Bitcoin Hosting) / Project Dorothy 1B (25 MW, Bitcoin Prop-Mining):

	●	Operations at D1A remained at capacity throughout the month following the completion of the 20MW Blockware and Canaan deployments.

	●	Transformer repair work impacted the availability of two MDCs at D1A. We expect the MDCs to return to service in April.

	●	ERCOT ERS period successfully completed.

Project Dorothy 2 (48 MW, Bitcoin Hosting):

	●	Operations remained strong for the month, with all customers at full capacity and minimal curtailment.

	●	ERCOT ERS period successfully completed.

Project Sophie (25 MW, Bitcoin Hosting):

●

Operations remained strong for the month, with all customers at full capacity.

Project Kati 1 (83 MW Under Construction, Bitcoin Hosting):

	●	Substantial completion of all phases (1-3) of K1A Galaxy (48 MW) has been achieved ahead of schedule. The facility has been fully commissioned and is transitioning to steady-state operations.

	●	Construction of K1B (35 MW, Soluna MDCs / Cormint Containers): Cormint containers have been received at the site and are being installed (12 MW). Construction on the remaining phases of Soluna MDCs (23MW) continues to progress as planned.

Project Kati 2 (Under Development, AI/HPC Hosting):

	●	Hyperscaler and neocloud interest, due diligence, and discussions remain active.

	●	Additional on-site generation options, including solar and gas, are under evaluation. An LOI for long-lead gas generation equipment has been signed.

	●	A campus expansion roadmap targeting a materially larger scale is under development.

	●	An Architectural and Engineering firm has been selected following a competitive design RFP. Design activity is expected to commence in mid-April 2026.

	●	Procurement workstreams for long-lead data center equipment are underway.

Project Grace (2 MW Under Development, AI/HPC Hosting):

●

Finalizing technical simulations with our OEM partner, confirming that the selected technology solution meets ERCOT grid stability and low-voltage ride-through requirements for AI load integration.

Pipeline Highlights:

	●	The development pipeline surpassed 4.3 GW, driven by existing and new Independent Power Producer (IPP) partnerships and asset opportunities across several U.S. Independent (Grid) System Operators (ISOs).

	●	Finalizing Power Purchase Agreements (PPAs) and Retail Electric Provider (REP) agreements for Project Rosa; Ellen and Hedy agreements now finalized, pending signatures.

	●	Advancing land due diligence activities and PPA negotiations for Projects Annie, Gladys, and Fei.

	●	Projects Annie, Gladys, and Fei are now being advanced outside of the ERCOT Large Flexible Load Batch study process, leveraging the sub-75 MW interconnection pathway to accelerate development timelines.

	●	Continuing to advance partnership opportunities and evaluate potential assets with multiple IPPs across the U.S. ISOs.

	●	Executed a Letter of Intent (LOI) for land acquisition supporting the Dorothy campus expansion, and are currently negotiating the definitive Purchase and Sale Agreement (PSA).

Customer Success:

●

Completing MW deployments across new & expanding partnership agreements secured previously at Project Dorothy 1 & 2.

View Soluna’s recent AMA here.

Soluna’s updated glossary of terms is available here.

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 include all statements, other than statements of historical fact, regarding our current views and assumptions with respect to future events regarding our business and our expectations with respect to the development, construction, commissioning, and operation of our project pipeline, including Project Kati 1 and Project Kati 2, the development of Project Grace, the expansion of hosting arrangements at Project Dorothy 1B, the expected return to service of equipment at Project Dorothy 1A, our ability to develop and deploy AI and high-performance computing infrastructure, the growth and conversion of our project pipeline, and other statements that are predictive in nature. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,” “future,” “intends,” “plans,” “believes,” “estimates,” “confident,” and similar statements. Readers are cautioned that any forward-looking information provided by us or on our behalf is not a guarantee of future performance. Actual results may differ materially from those contained in these forward-looking statements as a result of various factors disclosed in our filings with the Securities and Exchange Commission (“SEC”), including the “Risk Factors” section of our Annual Report on Form 10-K filed with the SEC on March 31, 2025. All forward-looking statements speak only as of the date on which they are made, and we undertake no duty to update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except to the extent required by 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 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.

Contact Information

Public Relations

West of Fairfax for Soluna

[email protected]