S-1: Soluna Holdings Registers 3.5M Shares for Resale

Sentiment:

Registration Statement for Secondary Offering 27 October 2025 5:00 PM

Soluna Holdings, Inc. filed an S-1 registration statement for the resale of up to 3,500,000 shares of common stock by a selling stockholder, GreenCloud Partners, LLC, from which the company will not receive direct proceeds for most shares.

Capital raiseThe company secured a new senior secured term loan facility with Generate Lending, LLC for up to $35.5 million, with an option for up to $64.5 million in additional tranche loan commitments for project-level financing.Closed a $20 million financing round from Spring Lane Capital for the Project Kati 1 expansion.Completed a public offering in July 2025, raising approximately $4.3 million net.Entered into a Standby Equity Purchase Agreement (SEPA) with YA II PN, LTD. on August 12, 2024, for the potential sale of up to $25 million of common stock.

Worse than expectedThe auditor's report explicitly states 'substantial doubt about the Company's ability to continue as a going concern,' which is a critical negative indicator of financial health.The July 2025 Public Offering raised only approximately $4.3 million net at a combined price of $0.55 per share/warrant unit, indicating significant dilution at a very low valuation compared to the current stock price of $3.05.The company will not receive any proceeds from the resale of up to 2,500,000 Conversion Shares by the Selling Stockholder, limiting direct capital infusion from this registration.The High Performance Computing (HPC) business, a stated growth area, generated minimal revenue in FY2024 and H1 2025, and a key partnership with HPE was terminated, suggesting challenges in this segment.

Summary

The S-1 registration statement covers the resale of up to 3,500,000 shares of common stock by GreenCloud Partners, LLC, the Selling Stockholder.
These shares comprise 1,000,000 Common Shares issued on April 29, 2025, and up to 2,500,000 Conversion Shares underlying a $12.5 million secured promissory note issued on June 20, 2024.
The company will not receive any proceeds from the resale of the Conversion Shares.
Proceeds from the sale of Common Shares up to $4.00 per share will be applied to reduce the outstanding principal balance of the Note; proceeds above $4.00 per share will first reduce the Note by $4.00 per share, with the remainder going to the Selling Stockholder.
Soluna Holdings, Inc. (SLNH) operates digital infrastructure co-located with renewable energy sources (wind, solar, hydroelectric) under its 'Renewable Computing' model.
The company's revenue streams include Bitcoin Mining (approximately 46-48% of total revenue in Q2/H1 2025), Bitcoin Hosting (approximately 46-51% of total revenue in Q2/H1 2025), High Performance Computing (minimal revenue in FY2024/H1 2025), and Demand Response (approximately 3-6% of total revenue in Q2/H1 2025).
Bitcoin Hosting revenue is highly concentrated, with three customers accounting for approximately 79% of hosting revenue and 40% of total revenue for the three months ended June 30, 2025.
The last reported sale price for the company's common stock on Nasdaq was $3.05 as of October 24, 2025.
As of October 22, 2025, there were 68,265,626 shares of common stock outstanding, along with various options, restricted stock units, convertible preferred stock, and warrants.

Sentiment

Score: 4

Explanation: While the company has made progress in securing new financing and advancing significant renewable computing projects, the explicit 'going concern' warning from its auditor, the low valuation and dilution from a recent public offering, and the fact that this S-1 is primarily for a selling stockholder's resale (not a direct capital raise for the company) present substantial financial and operational concerns. The minimal revenue from the HPC segment also weighs on the outlook.

Positives

The company settled a complaint with NYDIG ABL LLC on September 29, 2025, resolving a judgment of $9,182,646.13 plus interest, removing a significant legal and financial overhang.
Secured a new senior secured term loan facility with Generate Lending, LLC for up to $35.5 million, with an option for up to $64.5 million in additional project-level financing.
Closed a $20 million financing round from Spring Lane Capital on July 22, 2025, specifically for a 35 megawatt (MW) expansion of Project Kati 1 in Texas.
Signed term sheets for power for three new large-scale data center projects: Project Hedy (120 MW wind), Project Ellen (100 MW wind, two 50MW phases), and Project Annie (75 MW solar), indicating a robust growth pipeline.
The 'Renewable Computing' model leverages stranded renewable energy for high-performance computing, addressing a growing market need.
Proprietary MaestroOS operating system is used to optimize performance, manage power consumption, and increase operational efficiency.
The behind-the-meter data center model improves power economics and accelerates time-to-market by bypassing long interconnection queues.

Negatives

The company will not receive any proceeds from the resale of up to 2,500,000 Conversion Shares by the Selling Stockholder, limiting direct capital infusion from this registration.
The auditor's report, incorporated by reference, contains an explanatory paragraph regarding 'substantial doubt about the Company's ability to continue as a going concern,' indicating significant financial risk.
The High Performance Computing (HPC) Business generated minimal revenue in fiscal year 2024 and the six months ended June 30, 2025, and a partnership with Hewlett Packard Enterprise Company (HPE) was terminated.
Bitcoin Mining and Hosting businesses are subject to high volatility from Bitcoin market price, global network hash rate, mining difficulty, electricity costs, and periodic halving events.
High customer concentration in the Bitcoin Hosting Business, with three customers accounting for approximately 79% of hosting revenue and 40% of total revenue in Q2 2025, poses a significant risk.
A public offering in July 2025 raised only approximately $4.3 million net, for 8,794,544 shares and various warrants at a combined price of $0.55, suggesting significant dilution at a low valuation.

Risks

An investment in the company's securities involves a high degree of risk.
The auditor's report indicates substantial doubt about the company's ability to continue as a going concern.
The company's ability to service debt obligations and maintain flexibility in respect of debt covenants is a concern.
Economic dependence on regulated terms of service and electricity rates poses a risk.
The technology sector, in which the company operates, is speculative and highly competitive.
The company's ability to attract and retain hosted customers for its hosting operations is critical.
Dependency on continued growth in blockchain and cryptocurrency usage introduces market volatility risks.
The company faces risks from lawsuits and other legal proceedings and challenges.
Government regulations could impact the company's operations and profitability.
The company's ability to construct and complete the anticipated expansion of its data centers is subject to various factors.
Global economic and market conditions, political developments, tariffs, rising inflation, capital market disruptions, economic sanctions, bank failures, regional conflicts, and economic slowdowns or recessions could harm the business.
New risks regularly emerge, and management cannot predict or assess the impact of all potential risks.
The issuance of additional shares of common stock will likely dilute the relative interest of existing stockholders.
Anti-takeover provisions in the company's Articles of Incorporation and Bylaws, and Nevada law, may delay, defer, or prevent a change in control.

Future Outlook

The company aims to scale its 'Renewable Computing' digital infrastructure, leveraging a repeatable strategy and a growing pipeline of projects to energize the grid, lower computing costs, and advance a sustainable future. It is actively developing new infrastructure projects for AI and HPC workloads, with Project Kati in advanced development and Project Rosa in progress. Construction for the 35 MW expansion of Project Kati 1 is expected to begin in the third quarter of 2025. The company anticipates continued growth in blockchain and cryptocurrency usage and has access to further capital through the Generate Loan Facility for eligible projects.

Management Comments

Our mission is to make renewable energy a global superpower using computing as a catalyst.
Renewable Computing bridges this gap-unlocking stranded renewable energy and turning it into scalable computing power.
With a repeatable strategy and a growing pipeline of projects, we are scaling a new category of digital infrastructure-one that energizes the grid, lowers computing costs, and advances a more sustainable future.

Industry Context

Soluna Holdings operates at the intersection of renewable energy and high-performance computing (HPC), a rapidly expanding sector driven by the increasing demand for energy-intensive applications like AI, HPC, and Bitcoin mining. The company's 'Renewable Computing' model directly addresses the industry challenge of renewable energy curtailment by co-locating data centers with generation assets. This 'behind-the-meter' approach offers a competitive advantage by providing access to underutilized, low-cost power and accelerating time-to-market, which is crucial for large, time-sensitive computing workloads. While the termination of the HPE partnership highlights the competitive nature of the GPU-as-a-Service market, Soluna's focus on building its own AI/HPC infrastructure aligns with the broader trend of companies seeking dedicated, sustainable computing resources.

Comparison to Industry Standards

The filing does not provide specific comparable companies, projects, or results to global benchmarks for a detailed assessment.

Management Changes

Role	Previous Person	New Person	Effective Date	Reason
Chief Financial Officer and Treasurer	John Tunison	David C. Michaels (Interim)	August 21, 2025	John Tunison resigned; David C. Michaels, a Board member, was appointed interim.

Corporate Governance

Change Type	Description	Effective Date	Impact Assessment
Reporting Status	Qualifies as a 'smaller reporting company' and takes advantage of reduced reporting requirements, including presenting only two years of audited financial statements, reduced executive compensation disclosure, and exemption from auditor attestation requirements of Sarbanes-Oxley Section 404.	NA	Reduces compliance burden but may provide less detailed information to investors compared to larger public companies.
Anti-Takeover Provisions	Maintains a classified Board, requires 75% affirmative vote for director removal for cause, and restricts who can call special stockholder meetings. Opted out of Nevada's combinations with interested stockholders statutes, but Nevada's acquisition of controlling interest statutes may still apply.	NA	These provisions may delay, defer, or prevent a tender offer or change in control, potentially discouraging extraordinary corporate transactions and limiting shareholder influence over such events.

Legal Proceedings

The company settled a complaint filed by NYDIG ABL LLC on December 29, 2022, regarding a series of loans. A Stipulation and Agreed Judgment on February 23, 2024, made Soluna Parties liable for $9,182,646.13 plus interest. A Settlement Agreement was reached on September 29, 2025, for certain settlement payments, releasing claims, with a provision to revive the judgment if payments fail.

Related Party Transactions

GreenCloud Partners, LLC (the Selling Stockholder) is the holder of a secured promissory note in a principal amount of $12.5 million, issued on June 20, 2024, and is the recipient of the 3,500,000 shares registered for resale. This constitutes a material relationship.
David C. Michaels, a member of the company's Board of Directors, was appointed interim Chief Financial Officer and Treasurer, effective August 21, 2025. He also purchased one share of Series X Preferred Stock on May 23, 2023.

Stakeholder Impact

**Shareholders**: Face potential dilution from the resale of 3.5 million shares by the Selling Stockholder and from the recent July 2025 public offering at a low price. The 'going concern' warning poses a significant risk to investment value. Anti-takeover provisions may limit their ability to influence corporate control.
**Creditors**: The settlement of the NYDIG lawsuit and the new Generate loan facility provide some financial restructuring and access to capital, potentially improving the company's ability to meet its debt obligations. Proceeds from some share sales will reduce the Note balance.
**Employees**: Management changes, such as the CFO resignation and interim appointment, could impact internal dynamics. The company's growth strategy in renewable computing and new projects may offer future opportunities.
**Customers**: Expansion of data centers through projects like Kati, Hedy, Ellen, and Annie could lead to increased capacity for Bitcoin hosting and future HPC/AI workloads. The termination of the HPE partnership might affect some HPC customers.
**Suppliers**: New construction projects and data center expansions are likely to increase demand for equipment, services, and renewable energy, benefiting suppliers in those sectors.

Next Steps

Construction of Project Kati 1 (35 MW expansion) is scheduled to begin in the third quarter of 2025.
Continued development of new infrastructure projects intended to support AI and HPC workloads, including Project Kati and Project Rosa.
The Selling Stockholder may, from time to time, sell, transfer or otherwise dispose of any or all of the registered shares.
The company can draw upon Tranche B of the Generate Loan Facility from September 12, 2025, until October 31, 2026.
The company may request one or more Additional Tranche Loan Commitments (up to $64.5 million) for project-level financing, subject to Lender and Agent approval.

Key Dates

Date	Description
January 13, 2020	Class A Preferred Share Purchase Agreement and Side Letter Agreement entered into.
February 22, 2021	Industrial Power Contract entered into.
March 23, 2021	Common stock commenced trading on Nasdaq.
March 29, 2021	Company reincorporated in the State of Nevada.
May 3, 2021	Form of Guaranty of Rent entered into.
August 11, 2021	Agreement and Plan of Merger and Termination Agreement entered into.
August 18, 2021	Certificate of Designations, Preferences and Rights of 9.0% Series A Cumulative Perpetual Preferred Stock filed.
October 20, 2021	Securities Purchase Agreement entered into.
October 25, 2021	Registration Rights Agreement and Security Agreement entered into.
October 29, 2021	Soluna Callisto Holdings, Inc. merged into Soluna Computing, Inc.
November 2, 2021	Company changed its name from Mechanical Technology, Incorporated to Soluna Holdings, Inc.
November 5, 2021	Amended and Restated Contingent Rights Agreement entered into.
December 22, 2021	Certificate of Amendment to Certificate of Designations, Preferences and Rights of 9.0% Series A Cumulative Perpetual Preferred Stock filed.
December 29, 2021	NYDIG ABL LLC filed a complaint against Soluna MC Borrowings, LLC 2021-1 and Soluna MC, LLC.
December 30, 2021	Master Equipment Finance Agreement and Digital Asset Account Control Agreement with NYDIG, and Guaranty Agreement entered into.
January 13, 2022	Consent and Waiver Agreement entered into.
January 14, 2022	Employment Agreement with Michael Toporek entered into.
April 11, 2022	MTI Instruments, Inc. was sold.
April 21, 2022	Certificate of Amendment to Certificate of Designations, Preferences and Rights of 9.0% Series A Cumulative Perpetual Preferred Stock filed.
July 19, 2022	Issued 62,500 shares of Series B Preferred Stock and warrants to purchase up to 1,000,000 common shares to an accredited investor.
September 13, 2022	Entered into an Addendum Amendment, issuing 430,564 common shares and new warrants.
December 2, 2022	Entered into a Placement Agency Agreement with Univest Securities, LLC.
May 23, 2023	Sold one share of Series X Preferred Stock to David Michaels.
July 28, 2023	Paid a mandatory dividend on Series B Preferred Stock ($657,223.64) through the issuance of 44,000 common shares and 70,300 pre-funded warrants.
December 27, 2023	Formed a wholly owned subsidiary, SDI.
December 31, 2023	SCI transferred substantially all of its assets to SHI or its subsidiaries, including SDI.
February 23, 2024	Court approved Stipulation and Agreed Judgment in NYDIG case, making Soluna Parties jointly and severally liable for $9,182,646.13 plus interest.
June 20, 2024	CloudCo issued a secured promissory note (the Note) for $12.5 million to the Selling Stockholder. Began providing GPU-as-a-Service in partnership with HPE (later terminated).
July 12, 2024	First Amendment to Note Purchase Agreement entered into.
August 12, 2024	Entered into a Standby Equity Purchase Agreement (SEPA) with YA II PN, LTD. for up to $25 million of common stock.
March 21, 2025	Modification Agreement entered into with Note Parties, amending the Note and providing for Common Shares and Conversion Shares.
March 31, 2025	Annual Report on Form 10-K for the fiscal year ended December 31, 2024, filed with the SEC.
April 29, 2025	Issued 1,000,000 Common Shares directly to the Selling Stockholder.
July 15, 2025	Entered into a securities purchase agreement for the July 2025 Public Offering.
July 17, 2025	The July 2025 Public Offering closed, raising approximately $4.3 million net.
July 22, 2025	Closed a $20 million financing round from Spring Lane Capital for Project Kati 1 expansion; construction to begin in Q3 2025.
August 5, 2025	John Tunison notified his resignation as Chief Financial Officer and Treasurer, effective August 21, 2025.
August 8, 2025	David C. Michaels appointed interim Chief Financial Officer and Treasurer, effective August 21, 2025.
September 12, 2025	Subsidiaries entered into a Credit and Guaranty Agreement with Generate Lending, LLC for up to $35.5 million, and borrowed $12,623,591. Generate Warrants were issued.
September 29, 2025	Entered into a Settlement Agreement with NYDIG to fully resolve the Agreed Judgment Amount.
October 15, 2025	Date used for calculating the Selling Stockholder's ownership information.
October 22, 2025	Date used for calculating the number of outstanding common shares (68,265,626 shares).
October 24, 2025	Last reported sale price for common stock on Nasdaq was $3.05.
October 27, 2025	Filing date of this S-1 Registration Statement.
October 31, 2026	Deadline to draw upon Tranche B of the Generate Loan Facility.
September 12, 2030	Maturity date for Tranche A and Tranche B loans under the Generate Loan Facility.

Recommendation

sell

The auditor's explicit 'substantial doubt about the Company's ability to continue as a going concern' is a severe warning sign of financial instability. Despite recent financing and project developments, this fundamental concern, coupled with the significant dilution from the recent public offering at a very low price ($0.55) and the fact that this S-1 is for a secondary offering (meaning limited direct capital benefit to the company), indicates a high level of risk. The minimal revenue from the HPC segment, a key growth area, further dampens the outlook. A seasoned investor would likely view these factors as compelling reasons to exit or avoid the stock due to the significant risk of further value erosion.

Keywords

Renewable Computing, Bitcoin Mining, High Performance Computing, AI Workloads, Data Centers, Renewable Energy, SEC Filing, SLNH, Cryptocurrency, Demand Response, Digital Infrastructure, Green Energy, Blockchain

Disclaimer:The information provided here is for general informational purposes only and does not constitute financial advice, recommendation, or endorsement of any kind. It may contain errors or omissions. You should not rely on this information to make financial decisions. Always seek the advice of a qualified financial professional before making any investment or financial decisions. Use of this information is at your own risk.