8-K: Terrestrial Energy Changes Auditors Post-Merger

Terrestrial Energy Inc. announced the dismissal of WithumSmith+Brown, PC and the engagement of UHY LLP as its new independent registered public accounting firm following its business combination.

Summary

• Terrestrial Energy Inc. (formerly HCM II Acquisition Corp.) dismissed WithumSmith+Brown, PC as its independent registered public accounting firm.
• The dismissal was approved by the Audit Committee on November 21, 2025, with notice delivered to Withum on November 24, 2025.
• Withum's report on the financial statements of HCM II for the year ended December 31, 2024, included an explanatory paragraph describing an uncertainty about HCM II's ability to continue as a going concern.
• Withum's report also included an emphasis of matter paragraph with respect to the restatement of financial statements to correct the inclusion of a transaction with HCM II's underwriter in the related party transaction footnote.
• During the period from April 4, 2024 (HCM II's inception) through September 30, 2025, and the subsequent interim period, there were no disagreements with Withum on accounting principles, financial disclosures, or auditing scope, nor any reportable events.
• The Audit Committee approved the engagement of UHY LLP as the new independent registered public accounting firm on November 21, 2025, to audit the consolidated financial statements of the Registrant as of and for the year ended December 31, 2025.
• UHY LLP previously served as the independent registered public accounting firm of Legacy Terrestrial Energy prior to the consummation of the Merger.
• HCM II did not consult with UHY LLP on accounting principles or audit opinions prior to their engagement.

Sentiment

Score: 5

Explanation: The filing reports a routine change in auditors following a business combination, which is an expected corporate governance action. However, the mention of a 'going concern' uncertainty and a prior restatement from the previous auditor introduces a slight negative sentiment, balancing the routine nature of the change.

Positives

• The change in auditors is a natural consequence of the business combination, with the new auditor (UHY LLP) having prior experience with Legacy Terrestrial Energy.
• No disagreements on accounting principles or auditing scope were reported with the dismissed auditor, WithumSmith+Brown, PC, during the specified periods.

Negatives

• WithumSmith+Brown, PC's report for the year ended December 31, 2024, included an explanatory paragraph regarding an uncertainty about HCM II's ability to continue as a going concern.
• A restatement of financial statements was required to correct the inclusion of a transaction with HCM II's underwriter in the related party transaction footnote.

Risks

• Uncertainty about HCM II's (now Terrestrial Energy Inc.) ability to continue as a going concern, as noted in WithumSmith+Brown, PC's report for the year ended December 31, 2024.

Future Outlook

The company anticipates UHY LLP will audit its consolidated financial statements for the year ending December 31, 2025, following the recent business combination.

Industry Context

Changes in independent auditors are common following significant corporate events such as business combinations, as companies often consolidate their accounting practices and relationships with a single firm that has familiarity with the combined entity's operations.

Corporate Governance

Related Party Transactions

• WithumSmith+Brown, PC's report for the year ended December 31, 2024, included an emphasis of matter paragraph with respect to the restatement of financial statements to correct the inclusion of a transaction with HCM II's underwriter in the related party transaction footnote.

Stakeholder Impact

• Shareholders will have new auditors overseeing financial statements, potentially impacting confidence due to the prior 'going concern' note and restatement, but the change itself is routine post-merger.
• Investors should note the historical 'going concern' issue and restatement from the previous auditor, which might warrant closer scrutiny of future financial reports from the combined entity.

Next Steps

• UHY LLP will audit the consolidated financial statements of Terrestrial Energy Inc. for the year ended December 31, 2025.

Key Dates

Recommendation

The filing primarily details a routine change in independent auditors following a business combination, which is an expected corporate governance action. While the previous auditor's report included a 'going concern' explanatory paragraph and an emphasis of matter for a restatement, these relate to the pre-merger entity (HCM II) and are historical. The engagement of UHY LLP, who previously audited Legacy Terrestrial Energy, suggests a logical transition. There are no new material financial disclosures or strategic updates to warrant a change in investment thesis based solely on this 8-K. Investors should hold and await further financial reporting from the combined entity under the new auditor.

Keywords

Terrestrial Energy, HCM II Acquisition Corp, auditor change, Form 8-K, WithumSmith+Brown, UHY LLP, going concern, business combination, SEC filing, corporate governance