PERMA FIX ENVIRONMENTAL SERVICES INC

There are no material legal proceeding pending against us and/or our subsidiaries not previously reported by us in Item 3 of our Form 10-K for the year ended December 31, 2025, except for the matter described below. In addition, there has been no material change in the legal proceeding previously disclosed by us in our Form 10-Q for the quarter ended March 31, 2026 as discussed in “Note 9 - Commitments and Contingencies – Legal Matters – Michael O’Neill” of the Condensed Consolidated Financial Statements.

Monroy Wage and Hour Litigation

On June 26, 2026, Edwin Monroy filed a putative class action complaint in the Superior Court of the State of Washington for Benton County against Perma-Fix Northwest Richland, Inc., Perma-Fix Environmental Services, Inc., Perma-Fix Northwest, Inc., and other, unnamed, defendants. The complaint purports to assert claims on behalf of a class of approximately 50 or more current and former hourly-paid or non-exempt employees in Washington during the period beginning approximately June 26, 2023 through the date of final judgment. The complaint alleges, among other things, failures to provide legally compliant meal and rest periods, pay for all hours worked, pay minimum and overtime wages, properly administer paid sick leave, timely pay wages, provide accurate itemized wage statements and maintain required payroll and employment records, and reimburse certain business expenses. The complaint also alleges willful withholding of wages under Washington law. The plaintiff seeks class certification, recovery of allegedly unpaid wages and related compensation, statutory or enhanced damages, penalties, restitution, injunctive relief, pre- and post-judgment interest, and attorneys’ fees and costs.

The Company believes the claims are without merit and intends to defend the action vigorously. The action is in its preliminary stages, no class has been certified, and the allegations have not been proven. The Company has not accrued any amount with respect to this matter because a loss is not considered probable, and the amount or range of any reasonably possible loss cannot presently be estimated.