Perma-Fix Environmental Services Inc. Watch

from 8-K 15 pages Placement Agent’s Warrant

from 8-K 9 pages Perma-Fix Environmental Services, Inc. 8302 Dunwoody Place, Suite 250 Atlanta, Ga 30350 Attention: Mark Duff, President and Chief Executive Officer Re: Registered Direct Offering of Common Stock Dear Mr. Duff

from 8-K 30 pages Securities Purchase Agreement

from 10-K 61 pages Mixed Direct & Framework Contract for Services Number ‒ 945711- Ipr- 2023

from 10-K 14 pages Perma-Fix Environmental Services, Inc. 2017 Stock Option Plan

from 10-K 1 page Fourth Amendment to 2003 Outside Directors Stock Plan

from 10-K ~1 page Third Amendment to 2003 Outside Directors Stock Plan

from 10-K 1 page Second Amendment to 2003 Outside Directors Stock Plan

from 10-K 14 pages Project [***] -Term Sheet

from 10-Q 79 pages Section B - Supplies or Services and Prices Item No Supplies/Services Quantity Unit Unit Price Amount 0001 1 Job $39,998,941.49 $39,998,941.49 Ex-McKee - Article 520 Release Ffp the Contractor Shall Perform in Accordance With the Statement of Work (Sow) Contained Within Section C and Attachments Listed Within Section J. Fob: Destination Milstrip: N0002421rx01204 Purchase Request Number: N0002421rx01204 Psc CD: J998 Net Amt $39,998,941.49 Acrn Aa $39,998,941.49 Cin: N0002421rx012040001 Item No Supplies/Services Quantity Unit Unit Price Amount 0002 1 Set Nsp Data Ffp

from 8-K 17 pages Subscription Agreement

from 8-K 18 pages Placement Agency Agreement

from 10-K 89 pages Time-And-Material Master Task Ordering Agreement (Mtoa) Subcontract Form of Agreement *

from 10-K 87 pages Dated 02/23/2020 Time-And-Material Master Task Ordering Agreement (Mtoa) Subcontract Form of Agreement *

from 10-K 1 page Appendix “A” First Amendment to 2003 Outside Directors Stock Plan

from 10-K 6 pages Perma-Fix Environmental Services, Inc. 2003 Outside Directors Stock Plan

from 10-Q 118 pages 1. Contract Title Small Scale Sites Remediation Package # 02 2. Task Order Execution Date April 30, 2019 3. Task Order No. Contractor Shall Use for All Invoicing 541369 4. Framework Reference 507595 5. the Contract Type Is: Fixed Price 6. Control Order No. Not Applicable 7. the Task Order Price Is: $11,494,654.34 8. Contractor Hst# 9. Currency Is: Canadian 10. the Site Is: Municipality of Port Hope, Ontario 11. Price Schedule Is Provided in Schedule 2 12. the Schedule and Key Dates : Per Schedule 3 the Agreed Work Schedule Is Provided in Schedule 3 13. the Task Order Term Is as Set Out Below: A) the Task Order Effective Date Is: Upon Execution B) the Task Order Completion Date Is: December 16, 2019

from 10-K 3 pages First Amendment to 2017 Stock Option Plan Nonqualified Stock Option Agreement Dated July 27, 2017, by and Between Perma-Fix Envirnomental Services, Inc. and Robert Ferguson

from 10-K 2 pages Exhibit “B” Third Amendment to 2003 Outside Directors Stock Plan

from 10-K 2 pages Appendix “A” Second Amendment to 2003 Outside Directors Stock Plan