PESI

SEC source: 0001493152-26-045431 · ownership.xml · nonDerivative · entry 1

ZWECKER MARK A · CIK 0001256439 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 248,644

SEC source: 0001493152-26-045437 · ownership.xml · nonDerivative · entry 1

Duggan Kerry C · CIK 0001861456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,388

SEC source: 0001493152-26-045432 · ownership.xml · nonDerivative · entry 1

Bostick Thomas · CIK 0001724193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,718

SEC source: 0001493152-26-045435 · ownership.xml · nonDerivative · entry 1

Shelton Larry · CIK 0001370728 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 200,229

SEC source: 0001493152-26-045434 · ownership.xml · nonDerivative · entry 1

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 240,634

SEC source: 0001493152-26-045433 · ownership.xml · nonDerivative · entry 1

Grumski Joseph Timothy · CIK 0001802624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,099

SEC source: 0001493152-26-045436 · ownership.xml · nonDerivative · entry 1

Wamp Zach Paul · CIK 0001729607 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,248

SEC source: 0001493152-26-034315 · ownership.xml · derivative · entry 1

Wamp Zach Paul · CIK 0001729607 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2036-07-22

F1 · derivative.exercise_date: Non-Qualified Stock Option granted 07/22/2026 under the Company's 2003 Outside Directors Stock Plan. The option vests in four equal annual installmens of 25% each, beginning on the first anniversary of the grant date and on each successive anniversary thereafter.

SEC source: 0001493152-26-034313 · ownership.xml · derivative · entry 1

Shelton Larry · CIK 0001370728 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2036-07-22

F1 · derivative.exercise_date: Non-Qualified Stock Option granted 07/22/2026 under the Company's 2003 Outside Directors Stock Plan. The option vests in four equal annual installmens of 25% each, beginning on the first anniversary of the grant date and on each successive anniversary thereafter.

SEC source: 0001493152-26-034314 · ownership.xml · derivative · entry 1

ZWECKER MARK A · CIK 0001256439 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2036-07-22

F1 · derivative.exercise_date: Non-Qualified Stock Option granted 07/22/2026 under the Company's 2003 Outside Directors Stock Plan. The option vests in four equal annual installmens of 25% each, beginning on the first anniversary of the grant date and on each successive anniversary thereafter.

SEC source: 0001493152-26-034312 · ownership.xml · derivative · entry 1

Bostick Thomas · CIK 0001724193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2036-07-22

F1 · derivative.exercise_date: Non-Qualified Stock Option granted 07/22/2026 under the Company's 2003 Outside Directors Stock Plan. The option vests in four equal annual installmens of 25% each, beginning on the first anniversary of the grant date and on each successive anniversary thereafter.

SEC source: 0001493152-26-034310 · ownership.xml · derivative · entry 1

Grumski Joseph Timothy · CIK 0001802624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2036-07-22

F1 · derivative.exercise_date: Non-Qualified Stock Option granted 07/22/2026 under the Company's 2003 Outside Directors Stock Plan. The option vests in four equal annual installmens of 25% each, beginning on the first anniversary of the grant date and on each successive anniversary thereafter.

SEC source: 0001493152-26-034309 · ownership.xml · derivative · entry 1

Duggan Kerry C · CIK 0001861456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2036-07-22

F1 · derivative.exercise_date: Non-Qualified Stock Option granted 07/22/2026 under the Company's 2003 Outside Directors Stock Plan. The option vests in four equal annual installmens of 25% each, beginning on the first anniversary of the grant date and on each successive anniversary thereafter.

SEC source: 0001493152-26-034495 · ownership.xml · derivative · entry 1

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2036-07-22

F1 · derivative.exercise_date: Non-Qualified Stock Option granted 07/22/2026 under the Company's 2003 Outside Directors Stock Plan. The option vests in four equal annual installmens of 25% each, beginning on the first anniversary of the grant date and on each successive anniversary thereafter.

SEC source: 0001493152-26-033108 · ownership.xml · derivative · entry 2

Shelton Larry · CIK 0001370728 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,400 shares

Expires 2026-07-28

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: Non-Qualified Stock Option granted 07/28/2016 under the Company's Outside Directors Stock Plan. The option vests fully six months from grant date.

SEC source: 0001493152-26-033108 · ownership.xml · nonDerivative · entry 1

Shelton Larry · CIK 0001370728 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 198,983

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001493152-26-031651 · ownership.xml · nonDerivative · entry 1

Grumski Joseph Timothy · CIK 0001802624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,661

SEC source: 0001493152-26-031650 · ownership.xml · nonDerivative · entry 1

ZWECKER MARK A · CIK 0001256439 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 247,606

SEC source: 0001493152-26-031649 · ownership.xml · nonDerivative · entry 1

Bostick Thomas · CIK 0001724193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,610

SEC source: 0001493152-26-031648 · ownership.xml · nonDerivative · entry 1

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 239,345

SEC source: 0001493152-26-031646 · ownership.xml · nonDerivative · entry 1

Wamp Zach Paul · CIK 0001729607 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,473

SEC source: 0001493152-26-031645 · ownership.xml · nonDerivative · entry 1

Shelton Larry · CIK 0001370728 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 196,583

SEC source: 0001493152-26-031644 · ownership.xml · nonDerivative · entry 1

Duggan Kerry C · CIK 0001861456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,640

SEC source: 0001493152-26-014838 · ownership.xml · nonDerivative · entry 1

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 237,887

SEC source: 0001493152-26-014876 · ownership.xml · nonDerivative · entry 1

ZWECKER MARK A · CIK 0001256439 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 244,039

SEC source: 0001493152-26-014829 · ownership.xml · nonDerivative · entry 1

Duggan Kerry C · CIK 0001861456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,821

SEC source: 0001493152-26-014828 · ownership.xml · nonDerivative · entry 1

Grumski Joseph Timothy · CIK 0001802624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,133

SEC source: 0001493152-26-014827 · ownership.xml · nonDerivative · entry 1

Bostick Thomas · CIK 0001724193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,397

SEC source: 0001493152-26-014826 · ownership.xml · nonDerivative · entry 1

Wamp Zach Paul · CIK 0001729607 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,624

SEC source: 0001493152-26-014825 · ownership.xml · nonDerivative · entry 1

Shelton Larry · CIK 0001370728 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 195,218

SEC source: 0001493152-26-003012 · ownership.xml · derivative · entry 6

Grondin Richard · CIK 0001819004 · EVP of Hanford & Int. Waste Op

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,000

Underlying: Common Stock · 6,000 shares

Expires 2029-01-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: January 20, 2026,, the Reporting Person exercised the incentive stock option granted 1/19/2023 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 6,000 shares of the Company's Common Stock at an exercise price of $3.95 per share (the "Option shares"). As permitted by the 2017 Plan, the Reporting Person elected to pay the exercise price of the Option Shares by having the Company withhold from the Option Shares a number of shares having a fair market value equal to the aggregate exercise price of $23,700. Since the fair market value of the Company's Common Stock on January 20, 2026, (as determined in accordance with the 2017 Plan) was $13.71 per share, the Company withheld 1,729 shares of Common Stock ($23,700 divided by $13.71) to pay the aggregate exercise price of the option.

F4 · derivative.exercise_date: Incentive stock option granted 01/19/2023 under the Company's 2017 Stock Option Plan for the purchase of up to 30,000 shares of the Company's Common Stock.The option is for a 6 year period and vests over a 5 year period, at 1/5 increment per year.

SEC source: 0001493152-26-003012 · ownership.xml · derivative · entry 5

Grondin Richard · CIK 0001819004 · EVP of Hanford & Int. Waste Op

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock · 5,000 shares

Expires 2027-10-14

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: On January 20, 2026, the Reporting Person exercised the incentive stock option granted 10/14/2021 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 5,000 shares of the Company's Common Stock at an exercise price of $7.005 per share (the "Option shares"). As permitted by the 2017 Plan, the Reporting Person elected to pay the exercise price of the Option Shares by having the Company withhold from the Option Shares a number of shares having a fair market value equal to the aggregate exercise price of $35,025. Since the fair market value of the Company's Common Stock on January 20, 2026, (as determined in accordance with the 2017 Plan) was $13.71 per share, the Company withheld 2,555 shares of Common Stock ($35,025 divided by $13.71) to pay the aggregate exercise price of the option.

F3 · derivative.exercise_date: Incentive stock option granted 10/14/2021 under the Company's 2017 Stock Option Plan for the purchase of up to 25,000 shares of the Company's Common Stock. The option is for a 6 year period and vests over a 5 year period, at 1/5 increment per year.

SEC source: 0001493152-26-003012 · ownership.xml · nonDerivative · entry 4

Grondin Richard · CIK 0001819004 · EVP of Hanford & Int. Waste Op

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,308

F2 · shares: January 20, 2026,, the Reporting Person exercised the incentive stock option granted 1/19/2023 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 6,000 shares of the Company's Common Stock at an exercise price of $3.95 per share (the "Option shares"). As permitted by the 2017 Plan, the Reporting Person elected to pay the exercise price of the Option Shares by having the Company withhold from the Option Shares a number of shares having a fair market value equal to the aggregate exercise price of $23,700. Since the fair market value of the Company's Common Stock on January 20, 2026, (as determined in accordance with the 2017 Plan) was $13.71 per share, the Company withheld 1,729 shares of Common Stock ($23,700 divided by $13.71) to pay the aggregate exercise price of the option.

SEC source: 0001493152-26-003012 · ownership.xml · nonDerivative · entry 3

Grondin Richard · CIK 0001819004 · EVP of Hanford & Int. Waste Op

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,037

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: January 20, 2026,, the Reporting Person exercised the incentive stock option granted 1/19/2023 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 6,000 shares of the Company's Common Stock at an exercise price of $3.95 per share (the "Option shares"). As permitted by the 2017 Plan, the Reporting Person elected to pay the exercise price of the Option Shares by having the Company withhold from the Option Shares a number of shares having a fair market value equal to the aggregate exercise price of $23,700. Since the fair market value of the Company's Common Stock on January 20, 2026, (as determined in accordance with the 2017 Plan) was $13.71 per share, the Company withheld 1,729 shares of Common Stock ($23,700 divided by $13.71) to pay the aggregate exercise price of the option.

SEC source: 0001493152-26-003012 · ownership.xml · nonDerivative · entry 2

Grondin Richard · CIK 0001819004 · EVP of Hanford & Int. Waste Op

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,037

F1 · shares: On January 20, 2026, the Reporting Person exercised the incentive stock option granted 10/14/2021 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 5,000 shares of the Company's Common Stock at an exercise price of $7.005 per share (the "Option shares"). As permitted by the 2017 Plan, the Reporting Person elected to pay the exercise price of the Option Shares by having the Company withhold from the Option Shares a number of shares having a fair market value equal to the aggregate exercise price of $35,025. Since the fair market value of the Company's Common Stock on January 20, 2026, (as determined in accordance with the 2017 Plan) was $13.71 per share, the Company withheld 2,555 shares of Common Stock ($35,025 divided by $13.71) to pay the aggregate exercise price of the option.

SEC source: 0001493152-26-003012 · ownership.xml · nonDerivative · entry 1

Grondin Richard · CIK 0001819004 · EVP of Hanford & Int. Waste Op

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,592

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: On January 20, 2026, the Reporting Person exercised the incentive stock option granted 10/14/2021 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 5,000 shares of the Company's Common Stock at an exercise price of $7.005 per share (the "Option shares"). As permitted by the 2017 Plan, the Reporting Person elected to pay the exercise price of the Option Shares by having the Company withhold from the Option Shares a number of shares having a fair market value equal to the aggregate exercise price of $35,025. Since the fair market value of the Company's Common Stock on January 20, 2026, (as determined in accordance with the 2017 Plan) was $13.71 per share, the Company withheld 2,555 shares of Common Stock ($35,025 divided by $13.71) to pay the aggregate exercise price of the option.

SEC source: 0001493152-26-000332 · ownership.xml · nonDerivative · entry 1

Bostick Thomas · CIK 0001724193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,838

SEC source: 0001493152-26-000312 · ownership.xml · nonDerivative · entry 1

Wamp Zach Paul · CIK 0001729607 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,530

SEC source: 0001493152-26-000294 · ownership.xml · nonDerivative · entry 1

Grumski Joseph Timothy · CIK 0001802624 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,028

SEC source: 0001493152-26-000292 · ownership.xml · nonDerivative · entry 1

Duggan Kerry C · CIK 0001861456 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,767

SEC source: 0001493152-26-000290 · ownership.xml · nonDerivative · entry 1

Shelton Larry · CIK 0001370728 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 193,394

SEC source: 0001493152-26-000288 · ownership.xml · nonDerivative · entry 1

ZWECKER MARK A · CIK 0001256439 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 242,519

SEC source: 0001493152-26-000555 · ownership.xml · nonDerivative · entry 1

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 236,001

SEC source: 0001493152-25-027925 · ownership.xml · nonDerivative · entry 5

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 234,452

F5 · shares: Bona fide gift to non-profit organization unaffiliated with either the Reporting Person or the Issuer.

SEC source: 0001493152-25-027925 · ownership.xml · nonDerivative · entry 4

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 234,816

F4 · shares: Bona fide gift to non-profit organization unaffiliated with either the Reporting Person or the Issuer.

SEC source: 0001493152-25-027925 · ownership.xml · nonDerivative · entry 3

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 235,543

F3 · shares: Bona fide gift to non-profit organization unaffiliated with either the Reporting Person or the Issuer.

SEC source: 0001493152-25-027925 · ownership.xml · nonDerivative · entry 2

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 236,270

F2 · shares: Bona fide gift to non-profit organization unaffiliated with either the Reporting Person or the Issuer.

SEC source: 0001493152-25-027925 · ownership.xml · nonDerivative · entry 1

REEDER JOE · CIK 0001256444 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 237,360

F1 · shares: Gift in equal amounts to Reporting Person's four adult children, who are not affiliated with the Issuer. The Reporting Person retains no ownership control.

SEC source: 0001493152-26-005952 · ownership.xml · nonDerivative · entry 2

CENTOFANTI LOUIS F · CIK 0000926738 · Director · EVP of Strategic Initiatives

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 217,565

F2 · shares: Bona fide gift to non-profit organization unaffiliated with either the Reporting Person or the Issuer.

SEC source: 0001493152-26-005952 · ownership.xml · nonDerivative · entry 1

CENTOFANTI LOUIS F · CIK 0000926738 · Director · EVP of Strategic Initiatives

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 218,165

F1 · shares: Bona fide gift to non-profit organization unaffiliated with either the Reporting Person or the Issuer.