Soluna Holdings, Inc

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and

Stockholders of Soluna Holdings, Inc. and Subsidiaries

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Soluna Holdings, Inc. and Subsidiaries (the Company) as of December 31, 2024 and 2023, and the related consolidated statements of operations, changes in equity, and cash flows for each of the years in the two-year period ended December 31, 2024, and the related notes (collectively referred to as the financial statements). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the years in the two-year period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

Substantial Doubt about the Company’s Ability to Continue as a Going Concern

The accompanying financial statements have been prepared assuming that the Company will continue as a going concern. As discussed in Note 1 to the financial statements, the Company was in a net loss, has negative working capital, and has significant outstanding debt that raise substantial doubt about its ability to continue as a going concern. Management’s plans in regard to these matters are also described in Note 1. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audit provides a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Fair value of Warrants

Description of the Matter

As discussed in Note 12 to the financial statements, the Company had a total of approximately 2.8 million common stock warrant shares outstanding as of December 31, 2024. The Company uses option pricing models to estimate the fair value of the warrants using various market-based inputs.

We identified the measurement of fair value of the warrants as a critical audit matter. Specifically, there was a high degree of subjectivity and judgment in evaluating the determination of the expected volatility inputs used in the option pricing models for the warrants. Historical, implied, and peer group volatility levels provide a range of possible expected volatility inputs and the fair value estimates for the warrants are sensitive to the expected volatility inputs.

How We Addressed the Matter in Our Audit

The primary procedures we performed to address this critical audit matter included gaining an understanding of certain internal controls over the Company’s process to measure the fair value of the warrants. This included controls related to the evaluation of observable market information used in the determination of the expected volatility inputs. We also involved our firm’s valuation professionals with specialized skills and knowledge, who assisted in:

/s/UHY LLP

We have served as the Company’s auditor since 2021.

Albany, New York

March 31, 2025