PERMA FIX ENVIRONMENTAL SERVICES INC

Entry into Material Definitive Agreements

On August 10, 2026, subsequent to the end of the fiscal quarter ended June 30, 2026, and within four business days prior to the filing of this Quarterly Report on Form 10-Q, the Company and certain of its subsidiaries entered into an amendment to the PNC Loan Agreement. The amendment, among other things, extended the maturity date of the credit facility from May 15, 2027 to May 15, 2030 and eliminated the annual capital expenditure limitation of $6,000,000, provided that the Company maintains a minimum daily PNC Liquidity of $5,000,000. If PNC Liquidity falls below $5,000,000, the annual capital expenditure limitation of $6,000,000 becomes applicable.

Contract Award

On August 10, 2026, subsequent to the end of the fiscal quarter ended June 30, 2026, and within four business days prior to the filing of this Quarterly Report on Form 10-Q, the Company was awarded a Master IDIQ Subcontract by Hanford Tank Waste Operations & Closure, LLC (“H2C”) for the treatment and disposal of pretreated liquid mixed low-level waste from DOE’s Hanford Site (the “Company’s Master Subcontract”). H2C also awarded Master IDIQ Subcontracts to two other companies. H2C is the prime contractor to DOE’s Office of Environmental Management for tank waste operations and closure at the Hanford Site in southeastern Washington State. Work awarded to the Company under future task orders, if any, under the Company’s Master Subcontract, would be performed at its PFNW facility in Richland, Washington and would include the receipt and treatment of pretreated mixed low-level waste, with treated waste transported by rail for final disposal at a licensed commercial mixed low-level waste disposal facility outside the State of Washington. Task orders may be issued from January 1, 2027 through December 31, 2041, with performance of task orders issued before the end of the ordering period permitted for up to five years beyond the end of the ordering period. The multiple-award IDIQ procurement provides for a maximum cumulative quantity of 50 million gallons, with a maximum cumulative value of approximately $4.4 billion. These amounts represent procurement ceilings shared among all Master IDIQ Subcontract holders and do not represent amounts awarded or committed to the Company. The number, size and timing of task orders to be issued to the Company, if any, cannot be assured. Under the Company’s Performance Work Statement, the Company is required to maintain the capability to treat and dispose of pretreated tank waste at a rate of 100,800 gallons per week in accordance with facility license and permit conditions.

In accordance with Exchange Act Form 8-K Compliance and Disclosure Interpretation (“CDI”) 101.01, the Company is disclosing the above information in this Quarterly Report on Form 10-Q in lieu of filing a separate Current Report on Form 8-K.

The foregoing description of the amendment to the PNC Loan Agreement under “Credit Facility” does not purport to be complete and is qualified in its entirety by reference to the amendment, which is filed as Exhibits 4.1 and 10.6 to this Form 10-Q and incorporated herein by reference.

The information set forth above under “Credit Facility” is being provided pursuant to Items 1.01 and 2.03 of Form 8-K and the information set forth above under “Contract Award” is being provided pursuant to Item 1.01 of Form 8-K.