Soluna Reports Q2’25 Results

Steady gross margin, continued improvement in Three Month Adjusted EBITDA of +$2.3 million since Q3 2024, and energized Dorothy 2 

ALBANY, NY, August 15, 2025 – 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 financial results for the second quarter ended June 30, 2025.

“Second quarter results demonstrate continued Adjusted EBITDA improvement and margin strength in our operating sites. In Q2, we also welcomed our first customers into Project Dorothy 2, the expansion of our first major site in Texas. We rebuilt our capital raising toolkit, secured our first at-the-market offering issuance, and prepared for a successful equity offering in July. We expanded our partnership with Spring Lane Capital to help launch our next flagship data center, Project Kati. We are now focused on scale,” said John Belizaire, CEO of Soluna Holdings.

“We are pleased to report the fourth quarter in a row of Adjusted EBITDA growth, improving by 25.5% ($0.4M) in Q2 over the prior quarter amidst market softness in Hashprice, while maintaining a steady 19% gross margin,” said John Tunison, CFO of Soluna.  

Q2 2025 Operational and Corporate Highlights:

  • Project Kati Land Secured and Subsequently Closed $20M to Launch 35 MW Kati 1 – Soluna has secured land and $20M in funding from Spring Lane Capital to begin construction on Kati 1, the first 35 MW phase of our 166 MW wind-powered data center. Construction is expected to begin in Q3, with initial energization targeted for early 2026.
  • Expanded Hosting Deployments with Key Customers – Increased deployments of existing partners Blockware, Compass Mining, and other Top-tier Miners, as Dorothy 1 space became available and Dorothy 2 came online, deepening relationships with some of the industry’s most established miners.
  • Project Dorothy 2 Construction On Track – All three building phases progressing on schedule, with full energization anticipated in Q4.

  • 295 MW of New Projects Launched in Q2, Including Our First Solar-Powered Data Center – Including wind-powered Projects Hedy and Ellen, and solar-powered Project Annie. We believe these additions mark a major step in scaling Renewable Computing and diversifying our energy mix across Texas. 
  • Increased Power Pipeline to 2.8 GW of Long-Term Capacity – With 2.8 GW of long-term clean energy capacity in our pipeline, Soluna anticipates that it will be positioned to meet the rising demand for sustainable computing infrastructure at scale.

Second Quarter Finance and Operations Highlights:

  • Net loss for the three months declined Q2 2024 to Q2 2025 by ($1.4 million) – driven by the above-mentioned Revenue, Gross Profit and SG&A drivers with a $2.9 million increase in Operating Loss, increased by $1.3 million combined higher Interest, Tax and Other Expenses which include consent fees to Preferred B holder and Kati wind farm loss generation fee offset by the prior year loss on convertible debt and warrant revaluation for $5.6 million.
  • Adjusted EBITDA improved $0.4 million from Q1 2025 to Q2 2025, primarily driven by a steady 19% gross margin, controlling expenses, and no significant interconnection outages. This resilient progress was despite headwinds from average Hashprice declining by 5% to $51, dampening profit sharing. 

  • Adjusted EBITDA declined ($3.0 million) from Q2 2024 to Q2 2025, driven primarily by Bitcoin halving in April 2024 and Hashprice volatility ($0.6M) from fewer machines online and efficiency at Dorothy 1B. Professional fees were higher ($0.2M), including legal costs related to the Standby Equity Purchase Agreement and compliance costs.

In connection with our successful ATM raise and related fundraising, we incurred ($255) thousand of consent fees paid to the Series B Preferred stockholder. As part of securing land for Project Kati, we incurred ($291) thousand fees for lost power generation on the wind farm.

  • Gross profit for our operating sites in Soluna Digital remained steady compared to the prior quarter Q1 2025, Q2 2025 reported strong cost discipline and gross margin stability, despite a ($0.3M) decline in Demand Response Service gross profit from exiting the seasonally higher winter pricing period.

  • Revenue for Q2 2025 is $6.2 million, a Net Decline of $3.5 million for the three months Year-over-year. Four factors drove the decrease. Bitcoin halving and subsequent Hashprice volatility ($2.0 million), the change in commercial model mix to more Profit Sharing (fully offset by decline in cost of revenue by ($0.8 million) for no Gross Profit impact), lower Prop Mining volume related to site availability and miner efficiency ($0.6 million), and lower Demand Response Services driven by increased participation rate within ERCOT ($0.1 million).
  • Revenue Generation Poised for Growth – We expect Revenue to stabilize and grow as we continue to commission additional MW of Bitcoin Hosting capacity over the next two years, related to Dorothy 2 and Kati 1, as illustrated in the recently published 2025 Earnings Power Presentation.
  • Robust Cash Reserves – Quarter-end unrestricted cash was $9.9 million, a $2.0 million rise since December 31, 2024.
  • General and administrative expenses were flat year-over-year and improved from the prior quarter. Strong cost discipline has enabled these costs to be contained even as site development continues to grow substantially.

Q2 2025 Revenue & Cost of Revenue by Project Site

 

Q2 2024 Revenue & Cost of Revenue by Project Site

The audited financial statements and Annual Report on Form 10-K for the year ended December 31, 2024, filed with the U.S. Securities and Exchange Commission (“SEC”) on March 31, 2025,  are available online

Our current Investor Presentation can be found here.

Our 2025 Earnings Power Presentation can be found here.

Soluna’s glossary of terms can be found 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 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, (i) statements of Company plans and objectives, including the completion of Projects Kati 1, Dorothy 2, Hedy, Ellen, and Annie, and the closing of the land purchase for Project Kati, (ii) statements of future economic performance, and (iii) statements of assumptions underlying other statements about the Company or its business.  Soluna may also make written or oral forward-looking statements in its periodic reports to the 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.

Non-GAAP Measures

In addition to figures prepared in accordance with generally accepted accounting principles (“GAAP”), Soluna from time to time may present alternative non-GAAP performance measures, e.g., EBITDA, adjusted EBITDA, adjusted net profit/loss, adjusted earnings per share, free cash flow, both on a company basis and on a project-level basis, among others. EBITDA is defined as earnings before interest, taxes, and depreciation and amortization. Adjusted EBITDA is defined as EBITDA adjusted for stock-based compensation costs, provision for credit losses, loss on sale of fixed assets, impairment on fixed assets, fair value adjustment on Standby Equity Purchase Agreement draws, and loss (gain) on debt extinguishment and revaluation, net.  Project-level measures may not take into account a full allocation of corporate expenses.  These measures should be considered in addition to, but not as a substitute for, the information prepared in accordance with GAAP. Alternative performance measures are not subject to GAAP or any other generally accepted accounting principles. Other companies may define these terms in different ways. See our annual report on Form 10-K for the year ended December 31, 2024, for an explanation of how management uses these measures in evaluating its operations. Investors should review the non-GAAP reconciliations provided below and not rely on any single financial measure to evaluate the Company’s business.

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

John Tunison

Chief Financial Officer

Soluna Holdings, Inc.

ir@soluna.io


Soluna Holdings, Inc. and Subsidiaries

Condensed Consolidated Balance Sheets

As of June 30, 2025 (Unaudited) and December 31, 2024 

(Dollars in thousands, except per share)   June 30, 2025   December 31, 2024
Assets            
Current Assets:            
Cash   $ 9,878   $ 7,843
Restricted cash     2,215     1,150
Accounts receivable, net (allowance for expected credit losses of $244 at June 30, 2025 and December 31, 2024)     2,649     2,693
Prepaid expenses and other current assets     2,236     1,781
Equipment held for sale         28
Total Current Assets     16,978     13,495
Restricted cash, noncurrent     3,060     1,460
Other assets     1,107     2,724
Deposits and credits on equipment     1,046     5,145
Property, plant and equipment, net     56,521     47,283
Intangible assets, net     12,957     17,620
Operating lease right-of-use assets     283     313
Total Assets   $ 91,952   $ 88,040
             
Liabilities and Stockholders’ Equity            
Current Liabilities:            
Accounts payable   $ 3,942   $ 2,840
Accrued liabilities     5,934     6,785
Accrued interest payable     3,286     2,275
Contract liability     19,348     20,015
Current portion of debt     13,255     14,444
Income tax payable     62     37
Customer deposits     1,962     1,416
Operating lease liability     63     61
Total Current Liabilities     47,852     47,873
             
Other liabilities     333     235
Long-term debt     10,021     7,061
Operating lease liability     220     252
Deferred tax liability, net     4,207     5,257
Total Liabilities     62,633     60,678
             
Commitments and Contingencies (Note 10)        
             
Stockholders’ Equity:            
9.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share, $25.00 liquidation preference; authorized 6,040,000; 4,953,545 shares issued and outstanding as of June 30, 2025 and December 31, 2024     5     5
Series B Preferred Stock, par value $0.0001 per share, authorized 187,500; 62,500 shares issued and outstanding as of June 30, 2025 and December 31, 2024        
Common stock, par value $0.001 per share, authorized 75,000,000; 19,095,863 shares issued and 19,055,122 shares outstanding as of June 30, 2025 and 10,647,761 shares issued and 10,607,020 shares outstanding as of December 31, 2024     19     11
Additional paid-in capital     323,557     315,607
Accumulated deficit     (329,242)     (314,304)
Common stock in treasury, at cost, 40,741 shares at June 30, 2025 and December 31, 2024     (13,798)     (13,798)
Total Soluna Holdings, Inc. Stockholders’ (Deficit) Equity     (19,459)     (12,479)
Non-Controlling Interest     48,778     39,841
Total Stockholders’ Equity     29,319     27,362
Total Liabilities and Stockholders’ Equity   $ 91,952   $ 88,040

 

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

 

 

Soluna Holdings, Inc. and Subsidiaries

Condensed Consolidated Statements of Operations (Unaudited)

For the Three and Six Months Ended June 30, 2025 and 2024

 

(Dollars in thousands, except per share)   Three Months Ended   Six Months Ended
    June 30,   June 30,
    2025   2024   2025   2024
                 
Cryptocurrency mining revenue   $ 2,861   $ 4,484   $ 5,860   $ 10,880
Data hosting revenue     3,136     4,898     5,538     10,176
Demand response service revenue     161     293     668     1,168
High-performance computing service revenue             28    
Total revenue     6,158     9,675     12,094     22,224
Operating costs:                        
Cost of cryptocurrency mining revenue, exclusive of depreciation     1,767     1,883     3,721     3,724
Cost of data hosting revenue, exclusive of depreciation     1,617     2,176     2,945     4,427
Cost of high-performance computing services             7    
Cost of cryptocurrency mining revenue- depreciation     1,074     1,065     2,147     2,152
Cost of data hosting revenue- depreciation     512     441     913     877
Total costs of revenue     4,970     5,565     9,733     11,180
Operating expenses:                        
General and administrative expenses, exclusive of depreciation and amortization     5,397     5,382     11,344     9,378
Depreciation and amortization associated with general and administrative expenses     2,403     2,403     4,807     4,805
Total general and administrative expenses     7,800     7,785     16,151     14,183
Impairment on fixed assets     12         12     130
Operating loss     (6,624)     (3,675)     (13,802)     (3,269)
Interest expense     (1,196)     (449)     (2,034)     (873)
(Loss) gain on debt extinguishment and revaluation, net         (5,600)     551     (8,698)
Loss on sale of fixed assets     (22)     (21)     (22)     (21)
Other expense, net     (546)     (49)     (860)     (25)
Loss before income taxes     (8,388)     (9,794)     (16,167)     (12,886)
Income tax benefit, net     608     649     1,033     1,197
Net loss     (7,780)     (9,145)     (15,134)     (11,689)
(Less) Net (loss) income attributable to non-controlling interest     (398)     1,728     (196)     4,438
Net loss attributable to Soluna Holdings, Inc.   $ (7,382)   $ (10,873)   $ (14,938)   $ (16,127)
                         
Basic and Diluted loss per common share:                        
Basic & Diluted loss per share   $ (0.69)   $ (2.97)   $ (1.55)   $ (5.68)
                         
Weighted average shares outstanding (Basic and Diluted)     14,991,125     4,563,696     13,473,983     3,683,558

 

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

Soluna Holdings, Inc. and Subsidiaries
Condensed Consolidated Statements of Cash Flows (Unaudited) 

For the Six Months Ended June 30, 2025 and 2024 

    Six Months Ended June 30,
(Dollars in thousands)   2025   2024
Operating Activities            
Net loss   $ (15,134)   $ (11,689)
             
Adjustments to reconcile net loss to net cash used in operating activities:            
Depreciation expense     3,121     3,091
Amortization expense     4,746     4,743
Stock-based compensation     3,789     2,029
Deferred income taxes     (1,051)     (1,259)
Impairment on fixed assets     12     130
Provision for credit losses         244
Amortization of operating lease asset     30     122
(Gain) loss on debt extinguishment and revaluation, net     (551)     8,698
Amortization of deferred financing costs and discount on notes     338     59
SEPA fair value revaluation     118    
Loss on sale of fixed assets     22     21
Changes in operating assets and liabilities:            
Accounts receivable     44     (486)
Prepaid expenses and other current assets     (455)     (10,767)
Other long-term assets     1,607     1
Accounts payable     1,102     353
Contract liability     (667)    
Operating lease liabilities     (30)     (123)
Other liabilities and customer deposits     644     (404)
Accrued liabilities and interest payable     1,042     1,764
Net cash used in operating activities     (1,273)     (3,473)
Investing Activities            
Purchases of property, plant and equipment     (12,365)     (278)
Purchases of intangible assets     (83)     (64)
Proceeds from sale of property, plant and equipment         215
Deposits on equipment, net     4,099     (2,096)
Net cash used in investing activities     (8,349)     (2,223)
Financing Activities            
Proceeds from common stock warrant exercises         2,304
Proceeds from sale of common stock on SEPA     2,005    
Proceeds from notes     5,269     13,220
Proceeds from sale of common stock on ATM     2,178    
Payments on notes and deferred financing costs     (3,275)     (1,910)
Payments on ATM     (132)    
Contributions from non-controlling interest     11,852    
Distributions to non-controlling interest     (3,575)     (5,776)
Net cash provided by financing activities     14,322     7,838
             
Increase in cash & restricted cash     4,700     2,142
Cash & restricted cash – beginning of period     10,453     10,367
Cash & restricted cash – end of period   $ 15,153   $ 12,509
             
Supplemental Disclosure of Cash Flow Information            
Interest paid on debt     685     203
Warrant consideration in relation to convertible notes and revaluation of warrant liability         7,648
Notes converted to common stock         3,712
Noncash membership distribution accrual     323     456
Warrant consideration in relation to Soluna Cloud         314
Fair value consideration for Green Cloud issuance of shares     810      

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

Segment Information

The following table details revenue, cost of revenues, and other operating costs for the Company’s reportable segments for three months ended June 30, 2025 and 2024, and reconciles to net income (loss) on the consolidated statements of operations:

 For the three months ended June 30, 2025

    Cryptocurrency
Mining
  Data Center
Hosting
    High-
Performance
Computing
Services
  Total  
Segment Revenue: Revenue from external customers   $ 2,861   $ 3,136     $   $ 5,997  
Reconciliation of revenue                            
Demand response revenue (a)                         161  
Total consolidated revenue                         6,158  
Less: Segment cost of revenue                            
Utility costs     1,278     471           1,749  
Wages, benefits, and employee related costs     203     531           734  
Facilities and Equipment costs     250     521           771  
Cost of revenue- depreciation     1,074     512           1,586  
Other cost of revenue*     148     364           512  
Total segment cost of revenue     2,953     2,399           5,352  
General and administrative expenses     40     94       110     244  
Impairment on fixed assets         12           12  
Segment operating income (loss)   $ (132)   $ 631     $ (110)   $ 389  

 

For the three months ended June 30, 2024

 

    Cryptocurrency
Mining
    Data Center
Hosting
    High-
Performance
Computing
Services
  Total  
Segment Revenue: Revenue from external customers   $ 4,484     $ 4,898     $   $ 9,382  
Reconciliation of revenue                              
Demand response revenue (a)                         293  
                            9,675  
Less: Segment cost of revenue                              
Utility costs     1,322       1,363           2,685  
Wages, benefits, and employee related costs     190       468           658  
Facilities and Equipment costs     336       323           659  
Cost of revenue- depreciation     1,065       441           1,506  
Other cost of revenue*     127       92           219  
Total segment cost of revenue     3,040       2,687           5,727  
General and administrative expenses     106       146       58     310  
Impairment on fixed assets                      
Segment operating income   $ 1,338     $ 2,065     $ (58)   $ 3,345  

 

(a) Demand response service revenue is included as a reconciling item of total revenue and not included as part of segment gross profit or loss.
* Other cost of revenue includes insurance, outside service costs and margins, and general costs.

The following table presents the reconciliation of segment operating income (loss) to net income (loss) before taxes:

    For the three months ended June 30,
    2025   2024
Segment operating income   $ 389   $ 3,345
             
Reconciling Items:            
Elimination of intercompany costs     381     162
Other revenue (a)     161     293
General and administrative, exclusive of depreciation and amortization (b)     (5,152)     (5,072)
General and administrative, depreciation and amortization     (2,403)     (2,403)
Interest expense     (1,196)     (449)
Loss on debt extinguishment and revaluation, net         (5,600)
Loss on sale of fixed assets     (22)     (21)
Other expense, net     (546)     (49)
Net loss before taxes   $ (8,388)   $ (9,794)

 

(a) Demand response service revenue is included as a reconciling item of total revenue and not included as part of segment gross profit or loss
(b) The reconciling general and administrative expense, exclusive of depreciation and amortization represent corporate and unallocated general and administrative expenses for the three months ended June 30, 2025 and 2024.

The following table details revenue, cost of revenues, and other operating costs for the Company’s reportable segments for six months ended June 30, 2025 and 2024, and reconciles to net income (loss) on the consolidated statements of operations.

For the six months ended June 30, 2025

    Cryptocurrency

Mining

  Data Center
Hosting
    High-
Performance
Computing
Services
  Total  
Segment Revenue: Revenue from external customers   $ 5,860   $ 5,538     $ 28   $ 11,426  
Reconciliation of revenue                            
Demand response revenue (a)                         668  
Total consolidated revenue                         12,094  
Less: Segment cost of revenue                            
Utility costs     2,690     861           3,551  
Wages, benefits, and employee related costs     421     1,001       7     1,429  
Facilities and Equipment costs     457     886           1,343  
Cost of revenue-
depreciation
    2,147     913           3,060  
Other cost of revenue*     288     508           796  
Total segment cost of revenue     6,003     4,169       7     10,179  
General and administrative expenses     55     175       269     499  
Impairment on fixed assets         12           12  
Segment operating income (loss)   $ (198)   $ 1,182     $ (248)   $ 736  

 

For the six months ended June 30, 2024

    Cryptocurrency
Mining
    Data Center
Hosting
    High-
Performance
Computing
Services
  Total  
Segment Revenue: Revenue from external customers   $ 10,880     $ 10,176     $   $ 21,056  
Reconciliation of revenue                              
Demand response revenue (a)                         1,168  
                            22,224  
Less: Segment cost of revenue                              
Utility costs     2,699       2,720           5,419  
Wages, benefits, and employee related costs     381       927           1,308  
Facilities and Equipment costs     511       622           1,133  
Cost of revenue- depreciation     2,152       877           3,029  
Other cost of revenue*     304       309           613  
Total segment cost of revenue     6,047       5,455           11,502  
General and administrative expenses     107       153       58     318  
Impairment on fixed assets     130                 130  
Segment operating income (loss)   $ 4,596     $ 4,568     $ (58)   $ 9,106  

 

(a) Demand response service revenue is included as a reconciling item of total revenue and not included as part of segment gross profit or loss.
* Other cost of revenue includes insurance, outside service costs and margins, and general costs.

The following table presents the reconciliation of segment operating income (loss) to net income (loss) before taxes: 

    For the six months ended June 30,
    2025   2024
Segment operating income   $ 736   $ 9,106
             
Reconciling Items:            
Elimination of intercompany costs     446     322
Other revenue (a)     668     1,168
General and administrative, exclusive of depreciation and amortization (b)     (10,845)     (9,060)
General and administrative, depreciation and amortization     (4,807)     (4,805)
Interest expense     (2,034)     (873)
Gain (loss) on debt extinguishment and revaluation, net     551     (8,698)
Loss on sale of fixed assets     (22)     (21)
Other expense, net     (860)     (25)
Net loss before taxes   $ (16,167)   $ (12,886)

 

(a) Demand response service revenue is included as a reconciling item of total revenue and not included as part of segment gross profit or loss
(b) The reconciling general and administrative expense, exclusive of depreciation and amortization represent corporate and unallocated general and administrative expenses for the six months ended June 30, 2025 and 2024.

 Gross Profit Breakout:

The following table summarizes the balances for the project sites for cryptocurrency mining revenue, data hosting revenue, high-performance computing service revenue, demand response revenue, cost of cryptocurrency mining revenue, exclusive of depreciation, cost of data hosting revenue, exclusive of depreciation, cost of high-performance computing services, and cost of depreciation during the three months ended June 30, 2025:

    Soluna Digital  
(Dollars in thousands)   Project
Dorothy
1B
    Project
Dorothy
1A
    Project
Dorothy
2
  Project
Sophie
    Other     Total  
                                               
Cryptocurrency mining revenue   $ 2,861     $     $   $     $     $ 2,861  
Data hosting revenue           1,653       210     1,273             3,136   
Demand response services                           161       161   
Total revenue     2,861       1,653       210     1,273       161       6,158  
                                               
Cost of cryptocurrency mining, exclusive of depreciation     1,767                             1,767  
Cost of data hosting revenue, exclusive of depreciation           851       346     420             1,617  
Cost of high-performance computing service revenue                                  
Cost of cryptocurrency mining revenue- depreciation     1,074                             1,074  
Cost of data hosting revenue- depreciation           274       136     102             512  
Total cost of revenue     2,841       1,125       482     522             4,970  
Gross profit (loss)   $ 20     $ 528     $ (272)   $ 751     $ 161     $ 1,188  

The following table summarizes the balances for the project sites for cryptocurrency mining revenue, data hosting revenue, high-performance computing service revenue, demand response revenue, cost of cryptocurrency mining revenue, exclusive of depreciation, cost of data hosting revenue, exclusive of depreciation, cost of high-performance computing services, and cost of depreciation during the three months ended June 30, 2024:

    Soluna Digital  
(Dollars in thousands)   Project
Dorothy
1B
    Project
Dorothy
1A
    Project
Sophie
    Other     Total  
                                         
Cryptocurrency mining revenue   $ 4,484     $     $     $     $ 4,484  
Data hosting revenue           3,567       1,331             4,898  
Demand response services                       293       293  
High-performance computing services                              
Total revenue     4,484       3,567       1,331       293       9,675  
                                         
Cost of cryptocurrency mining, exclusive of depreciation     1,883                         1,883  
Cost of data hosting revenue, exclusive of depreciation           1,758       418             2,176  
Cost of high-performance computing service revenue                              
Cost of cryptocurrency mining revenue- depreciation     1,065                         1,065  
Cost of data hosting revenue- depreciation           290       151             441  
Total cost of revenue     2,948       2,048       569             5,565  
Gross profit   $ 1,536     $ 1,519     $ 762     $ 293     $ 4,110  

The following table summarizes the balances for the project sites for cryptocurrency mining revenue, data hosting revenue, high-performance computing service revenue, demand response revenue, cost of cryptocurrency mining revenue, exclusive of depreciation, cost of data hosting revenue, exclusive of depreciation, cost of high-performance computing services, and cost of depreciation during the six months ended June 30, 2025:

        Soluna Digital   Soluna Cloud      
(Dollars in thousands)   Project Dorothy 1B   Project Dorothy 1A     Project Dorothy 2   Project Sophie     Other     Soluna Digital Subtotal   Project
Ada
  Total  
                                         
Cryptocurrency mining revenue   $ 5,860   $     $   $     $     $ 5,860   $   $ 5,860  
Data hosting revenue         3,024       210     2,304             5,538         5,538  
Demand response services                         668       668         668  
High-performance computing services                                   28     28  
Total revenue     5,860     3,024       210     2,304       668       12,066     28     12,094  
                                                         
Cost of cryptocurrency mining, exclusive of depreciation     3,721                           3,721         3,721  
Cost of data hosting revenue, exclusive of depreciation         1,736       416     793             2,945         2,945  
Cost of high-performance computing service revenue                                   7     7  
Cost of cryptocurrency mining revenue- depreciation     2,147                           2,147         2,147  
Cost of data hosting revenue- depreciation         569       137     207             913         913  
Total cost of revenue     5,868     2,305       553     1,000             9,726     7     9,733  
Gross (loss) profit   $ (8)   $ 719     $ (343)   $ 1,304     $ 668     $ 2,340   $ 21   $ 2,361  

 The following table summarizes the balances for the project sites for cryptocurrency mining revenue, data hosting revenue, high-performance computing service revenue, demand response revenue, cost of cryptocurrency mining revenue, exclusive of depreciation, cost of data hosting revenue, exclusive of depreciation, cost of high-performance computing services, and cost of depreciation during the six months ended June 30, 2024:

    Soluna Digital     Soluna Cloud        
(Dollars in thousands)   Project Dorothy 1B     Project Dorothy 1A     Project Sophie     Other     Soluna Digital Subtotal     Project
Ada
    Total  
                                           
Cryptocurrency mining revenue   $ 10,880     $     $     $     $ 10,880     $    –     $ 10,880  
Data hosting revenue           7,108       3,068             10,176             10,176  
Demand response services                       1,168       1,168             1,168  
High-performance computing services                                          
Total revenue     10,880       7,108       3,068       1,168       22,224             22,224  
                                                         
Cost of cryptocurrency mining, exclusive of depreciation   $ 3,724                         3,724             3,724  
Cost of data hosting revenue, exclusive of depreciation           3,495       931       1       4,427             4,427  
Cost of high-performance computing service revenue                                          
Cost of cryptocurrency mining revenue- depreciation     2,152                         2,152             2,152  
Cost of data hosting revenue- depreciation           575       302             877             877  
Total cost of revenue     5,876       4,070       1,233       1       11,180             11,180  
Gross profit   $ 5,004     $ 3,038     $ 1,835     $ 1,167     $ 11,044     $     $ 11,044  

 

EBITDA and Adjusted EBITDA Tables:

 

Reconciliations of EBITDA and Adjusted EBITDA to net loss, the most comparable GAAP financial metric, for historical periods are presented in the table below:

 

(Dollars in thousands)   Three Months Ended 

June 30,

  Six Months Ended 

June 30,

    2025   2024   2025   2024
                 
Net loss   $ (7,780)   $ (9,145)   $ (15,134)   $ (11,689)
Interest expense     1,196     449     2,034     873
Income tax benefit     (608)     (649)     (1,033)     (1,197)
Depreciation and amortization     3,989     3,909     7,868     7,834
EBITDA     (3,203)     (5,436)     (6,265)     (4,179)
                         
Adjustments: Non-cash items                        
                         
Stock-based compensation costs     1,942     1,368     3,789     2,029
Loss on sale of fixed assets     22     21     22     21
Provision for credit losses         244         244
Impairment on fixed assets     12         12     130
Fair value adjustment on SEPA draws             118    
Loss (gain) on debt extinguishment and revaluation, net         5,600     (551)     8,698
Adjusted EBITDA   $ (1,227)   $ 1,797   $ (2,875)   $ 6,943

 

The following table represents the Adjusted EBITDA activity between each three-month period from January 1, 2025 through June 30, 2025.

(Dollars in thousands)   Three months ended

March 31, 2025

  Three months ended

June 30, 2025

         
Net loss from continuing operations)   $ (7,354)   $ (7,780)
Interest expense, net     838     1,196
Income tax benefit from continuing operations     (425)     (608)
Depreciation and amortization     3,879     3,989
EBITDA     (3,062)     (3,203)
             
Adjustments: Non-cash items            
             
Stock-based compensation costs     1,847     1,942
Loss on sale of fixed assets         22
Impairment on fixed assets         12
Fair value adjustment on SEPA draws     118    
Gain on debt extinguishment and revaluation, net     (551)    
Adjusted EBITDA   $ (1,648)   $ (1,227)

 

The following table represents the Adjusted EBITDA activity between each three-month period from January 1, 2024 through December 31, 2024.

(Dollars in thousands)   Three months ended

March 31, 2024

  Three months ended

June 30, 2024

  Three months ended

September 30, 2024

  Three months ended

December 31, 2024

                 
Net loss from continuing operations   $ (2,544)   $ (9,145)   $ (8,093)   $ (38,518)
Interest expense, net     424     449     821     833
Income tax benefit from continuing operations     (548)     (649)     (547)     (743)
Depreciation and amortization     3,926     3,909     3,916     3,889
EBITDA     1,258     (5,436)     (3,903)     (34,539)
                         
Adjustments: Non-cash items                        
                         
Stock-based compensation costs     661     1,368     1,257     2,025
Loss on sale of fixed assets     1     21         9
Provision for credit losses         244     367     149
Convertible note inducement expense                 388
Placement agent release expense                 1,000
Loss on contract                 28,593
Impairment on fixed assets     130            
Loss (gain) on debt extinguishment and revaluation, net     3,097     5,600     (1,203)     (145)
Adjusted EBITDA   $ 5,147   $ 1,797   $ (3,482)   $ (2,520)

 

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