Form 8-K

8-K — Soluna Holdings, Inc

Accession: 0001493152-26-041699

Filed: 2026-09-08

Period: 2026-09-08

CIK: 0000064463

SIC: 6199 (FINANCE SERVICES)

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

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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): September 8, 2026

SOLUNA

HOLDINGS, INC.

(Exact

name of Registrant as Specified in Its Charter)

Nevada

001-40261

14-1462255

(State

or Other Jurisdiction

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 ☐

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.

September 8, 2026, Soluna Holdings, Inc. (the “Company”) issued a press release announcing two milestones at its Project

Kati campus in Willacy County, Texas. The Company has energized the final 14 MW at Project Kati 1, completing the 83 MW site, and has

been notified that ERCOT has conditionally classified the full 166 MW Kati campus, including the planned Kati 2 AI expansion, as Base

Load in its Batch Zero interconnection process. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein

by reference.

The

information in this Current Report on Form 8-K under Item 7.01, including the information contained in Exhibit 99.1, is being furnished

to the Securities and Exchange Commission, and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities

Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, and shall not be deemed

to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be

expressly set forth by a specific reference in such filing.

Item

9.01 Financial Statements and Exhibits

(d)

Exhibits.

99.1

Press Release, dated September 8, 2026

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.

Date:

September 8, 2026

By:

/s/

Michael Picchi

Michael

Picchi

Chief

Financial Officer

(principal

financial officer)

EX-99.1

Filename: ex99-1.htm · Sequence: 2

Exhibit

99.1

Soluna

Finishes Kati 1 and Secures Conditional Base Load Position for All 166 MW in ERCOT

Final

14 MW energized on time, lifting company-wide operating capacity to 206 MW

ALBANY,

NY, September 8, 2026 – Soluna Holdings, Inc. (“Soluna” or the “Company”) (NASDAQ: SLNH), a

developer of green data centers for intensive computing applications, including AI and Bitcoin mining, today announced two milestones

at its Project Kati campus in Willacy County, Texas. The Company has energized the final 14 MW at Project Kati 1, completing the 83 MW

site, and has been notified that ERCOT has conditionally classified the full 166 MW Kati campus, including the planned Kati 2 AI expansion,

as Base Load in its Batch Zero interconnection process.

With

Project Kati 1 complete, Soluna’s total operating capacity increases to approximately 206 MW, delivering on the timeline the Company

outlined on its second-quarter earnings call. Every phase of Project Kati 1 was delivered on time with infrastructure costs on budget.

Batch

Zero is ERCOT’s transitional process for evaluating large load interconnection requests on a system-wide basis, replacing the prior project-by-project

approach. A Base Load classification means a project’s interconnection capacity is preserved on the basis of prior study work, and that

the project is not subject to further reliability evaluation or megawatt allocation within the Batch Zero study. According to ERCOT,

more than 438,000 MW of large load interconnection requests had entered the queue as of mid-2026, with nearly 90 percent coming from

data centers.

The

classification is conditional pending completion of ERCOT’s ongoing verification process, under which ERCOT may remove a project from

Batch Zero if the applicant does not respond to its information requests. Soluna is participating in the verification process and expects

the full 166 MW to be confirmed as Base Load.

“This

is proof that the Soluna model works,” said John Belizaire, CEO of Soluna. “We build where the power already is and we bring

generation with us, and ERCOT’s framework recognizes exactly that. Kati 1 is finished and energized today, and our full 166 megawatts

is positioned as Base Load while much of the market is still waiting to learn what it will be allocated.”

Project

Kati is a 166 MW wind-powered campus in Willacy County, Texas, powered by the Las Majadas wind energy project and built in two phases.

Kati 1, the 83 MW first phase, is dedicated to Bitcoin hosting. Kati 2 will add 83 MW for AI and high-performance computing. Built behind

the meter, the campus converts stranded renewable energy into productive computing capacity while bypassing the transmission upgrades

and interconnection queues that constrain grid-connected development.

Energization

of Kati 1 began in February 2026 following ERCOT approval and proceeded in phases. Kati 1A completed its 48 MW on April 1, filled by

Galaxy Digital, with the remaining 35 MW energized in phases through the summer. The co-mining agreement with Bitdeer (NASDAQ: BTDR)

announced in August is now underway, with equipment being delivered and deployed.

Soluna

continues to advance a development pipeline of approximately 6.3 GW, including more than 650 MW of AI and high-performance computing

capacity in development at Kati 2 and Project Dorothy 3.

For

more information, visit www.solunacomputing.com.

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, including the anticipated timing

and completion of the deployment described in this release, the expected hash rate and capacity contribution of that deployment, the

final classification of the Project Kati campus in ERCOT’s Batch Zero process, the development of Project Kati 2, and the Company’s development

pipeline. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,”

“future,” “intends,” “plans,” “believes,” “estimates,” “confident,” and similar

statements. 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 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 solunacomputing.com

and follow us on:

LinkedIn:

linkedin.com/company/solunaholdings

(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

Public

Relations

West

of Fairfax for Soluna

Soluna@westof.co

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