Soluna Holdings, Inc. (SLNH) 2025 Annual Report (10-K) Summary
Business Context and Reporting Period
Company: Soluna Holdings, Inc.
Reporting Period: Fiscal Year Ended December 31, 2025
Business Model: Soluna operates a "Renewable Computing" model, developing and operating modular data centers co-located with renewable energy assets (wind, solar, hydro). The company monetizes underutilized energy through four primary revenue streams: Bitcoin Mining, Bitcoin Hosting, High-Performance Computing (HPC)/AI, and Demand Response services.
Operational Status: As of December 31, 2025, the company operated approximately 123 MW of capacity across sites in Kentucky and Texas, with an additional 83 MW under construction and a development pipeline exceeding 4.3 GW.
Key Financial Metrics
| Metric (in thousands) | 2025 | 2024 |
|---|---|---|
| Total Revenue | $29,717 | $38,021 |
| Net Loss | $(56,991) | $(58,300) |
| Net Loss Attributable to Soluna | $(53,411) | $(63,334) |
| Adjusted EBITDA | $(13,229) | $942 |
| Cash and Restricted Cash | $88,843 | $10,453 |
| Total Debt Outstanding | $26,757 | $21,505 |
| Working Capital | $42,938 | $(34,378) |
Note: Revenue declined primarily due to the April 2024 Bitcoin halving and a shift in hosting contract structures. Net loss narrowed slightly year-over-year.
Material Changes vs. Prior Period
- Revenue Decline: Total revenue decreased by 22% to $29.7 million. Cryptocurrency mining revenue dropped 33% to $11.4 million due to the Bitcoin halving reducing block rewards. Data hosting revenue fell 10% to $17.0 million following the departure of a major customer in late 2024 and a shift to profit-sharing contracts.
- Cost Reductions: Cost of High-Performance Computing (HPC) services plummeted 100% to $7,000 (from $5.7 million) following the termination of the HPE agreement in March 2025.
- One-Time Losses: The 2024 period included a $28.6 million "Loss on contract" related to the HPE termination, which was not present in 2025. However, 2025 saw a significant $23.7 million fair value adjustment loss related to warrant revaluations.
- Liquidity Improvement: Cash position improved dramatically from $7.8 million in 2024 to $76.4 million in 2025, driven by $119.4 million in net financing proceeds (ATM offerings, SEPA draws, and equity offerings).
- Debt Structure: The company settled the NYDIG equipment financing dispute in September 2025, recording a gain on debt extinguishment. New debt facilities were established with Generate Capital ($17M drawn) and Galaxy Digital ($4.6M outstanding).
Guidance, Outlook, and Risks
Outlook and Strategy:
- Project Kati: Construction began on Project Kati 1 (83 MW) in late 2025, with initial energization expected in H1 2026. Project Kati 2 (100+ MW) is in development for AI/HPC workloads.
- Capital Formation: The company secured a new $250 million Standby Equity Purchase Agreement (SEPA) in March 2026 and maintains an ATM facility with $64.5 million remaining capacity.
- Operational Focus: Management plans to focus on optimizing existing sites, advancing the 4.3 GW pipeline to shovel-ready status, and scaling AI/HPC infrastructure.
- Internal Controls: Management identified a material weakness in internal controls over financial reporting related to balance sheet classification and presentation errors, though financial statements were corrected prior to issuance.
- HPE Liability: A contract liability of approximately $19.3 million remains outstanding related to the terminated HPE agreement. HPE terminated the agreement for cause in March 2025 due to payment defaults.
- Debt Covenants: As of December 31, 2025, the company was not in compliance with the Forward Contracted Debt Service Coverage Ratio covenant under the Generate Credit Agreement. A limited waiver was obtained in March 2026.
- Bitcoin Volatility: Profitability remains highly sensitive to Bitcoin prices, mining difficulty, and network hash rate.
Key Facts for Investor Verification
- Going Concern Status: While the company raised significant capital in 2025, it continues to incur recurring operating losses. Verify the sufficiency of the $76.4 million cash balance against the $27 million committed capital expenditures for Project Kati and ongoing operational burn.
- HPE Litigation Risk: Confirm the status of the $19.3 million liability to Hewlett Packard Enterprise and any potential legal actions or collection efforts.
- Debt Covenant Compliance: Monitor the company's ability to maintain compliance with the Generate Capital debt covenants, specifically the Debt Service Coverage Ratio, given the recent waiver.
- Revenue Concentration: In 2025, two customers accounted for 59% of hosting revenue and 34% of total revenue. Verify the stability of these key contracts.
- Internal Control Remediation: Assess the progress of remediation efforts regarding the material weakness in internal controls over financial reporting.