PERMA FIX ENVIRONMENTAL SERVICES INC

For the period ended Jun 30, 2026. Filed Aug 12, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2026 · Filed Aug 12, 2026

PESI$15.59+11.0%Stored close · as of Nov 9, 2026

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Contents

Item 4. Controls and Procedures

Item 4.	Controls and Procedures

(a)	Evaluation of disclosure controls and procedures.
	We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our periodic reports filed with the SEC is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC and that such information is accumulated and communicated to our management. As of the end of the period covered by this report, we conducted an evaluation with the participation of our Principal Executive Officer and Principal Financial Officer. Based on this recent assessment, our Principal Executive Officer and Principal Financial Officer have concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) were not effective as of June 30, 2026 due to a material weakness in our internal controls over financial reporting identified for the year ended December 31, 2025, as set forth below. Material Weakness For the Treatment Segment, management did not have a completeness check control that was effectively designed and implemented to provide assurance that revenue for waste disposal was appropriately accounted for as part of the period-end revenue reconciliation process. The material weakness identified resulted in errors in our books and records which led to identified adjustments during the year ended December 31, 2025. The errors arising from the underlying revenue adjustments were not material to the financial statements previously reported in any interim or annual period. Remediation of Material Weakness in Internal Control Over Financial Reporting We are committed to maintaining effective internal control over financing reporting. For the material weakness identified, we have commenced the process of developing and implementing our remediation plan that includes completeness checks and additional reconciliation procedure related to processed waste and our inventory waste management systems at our Treatment Segment. However, some of these steps will take time to be fully integrated and validated for operating effectiveness. Additional controls may also be required over time. Until the remediation steps set forth above are fully implemented and tested, the material weakness described above will continue to exist.
(b)	Changes in internal control over financial reporting.
	There was no other change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during our most recently completed fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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