The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jan 20, 2026 | Grondin Richard | EVP of Hanford & Int. Waste Op | Tax withholding(F) | 2K | $13.71 | $24K |
| Jan 20, 2026 | Grondin Richard | EVP of Hanford & Int. Waste Op | Option exercise(M) | 6K | $3.95 | $24K |
| Jan 20, 2026 | Grondin Richard | EVP of Hanford & Int. Waste Op | Tax withholding(F) | 3K | $13.71 | $35K |
| Jan 20, 2026 | Grondin Richard | EVP of Hanford & Int. Waste Op | Option exercise(M) | 5K | $7.01 | $35K |
| Jan 20, 2026 | Grondin Richard | EVP of Hanford & Int. Waste Op | Option exercise(M) | 5K | — | $0 |
| Jan 20, 2026 | Grondin Richard | EVP of Hanford & Int. Waste Op | Option exercise(M) | 6K | — | $0 |
| Jan 2, 2026 | Zwecker Mark A | Director | Grant(A) | 1K | $9.44 | $13K |
| Jan 2, 2026 | Shelton Larry | Director | Grant(A) | 2K | $9.44 | $15K |
| Jan 2, 2026 | Duggan Kerry C | Director | Grant(A) | 929 | $9.44 | $9K |
| Jan 2, 2026 | Grumski Joseph Timothy | Director | Grant(A) | 2K | $9.44 | $17K |
| Jan 2, 2026 | Wamp Zach Paul | Director | Grant(A) | 964 | $9.44 | $9K |
| Jan 2, 2026 | Bostick Thomas | Director | Grant(A) | 1K | $9.44 | $12K |
| Jan 2, 2026 | Reeder Joe | Director | Grant(A) | 2K | $9.44 | $15K |
| Dec 15, 2025 | Reeder Joe | Director | Gift(G) | 727 | — | $0 |
| Dec 15, 2025 | Reeder Joe | Director | Gift(G) | 727 | — | $0 |
| Dec 15, 2025 | Reeder Joe | Director | Gift(G) | 364 | — | $0 |
| Dec 15, 2025 | Reeder Joe | Director | Gift(G) | 11K | — | $0 |
| Dec 15, 2025 | Reeder Joe | Director | Gift(G) | 1K | — | $0 |
| Nov 17, 2025 | Centofanti Louis F | EVP of Strategic Initiatives, Director | Gift(G) | 600 | — | $0 |
| Nov 17, 2025 | Centofanti Louis F | EVP of Strategic Initiatives, Director | Gift(G) | 600 | — | $0 |
| Oct 1, 2025 | Duggan Kerry C | Director | Grant(A) | 1K | $7.58 | $9K |
| Oct 1, 2025 | Grumski Joseph Timothy | Director | Grant(A) | 2K | $7.58 | $17K |
| Oct 1, 2025 | Reeder Joe | Director | Grant(A) | 2K | $7.58 | $16K |
| Oct 1, 2025 | Shelton Larry | Director | Grant(A) | 2K | $7.58 | $15K |
| Oct 1, 2025 | Wamp Zach Paul | Director | Grant(A) | 1K | $7.58 | $9K |
| Oct 1, 2025 | Zwecker Mark A | Director | Grant(A) | 2K | $7.58 | $12K |
| Oct 1, 2025 | Bostick Thomas | Director | Grant(A) | 2K | $7.58 | $13K |
| Sep 16, 2025 | Duggan Kerry C | Director | Sell(S) | 6K | $8.60 | $49K |
| Sep 11, 2025 | Shelton Larry | Director | Buy(P) | 1K | $8.58 | $9K |
| Sep 11, 2025 | Duff Mark | President and CEO, Director | Buy(P) | 897 | $8.05 | $7K |
| Sep 9, 2025 | Shelton Larry | Director | Buy(P) | 1K | $9.61 | $10K |
| Sep 2, 2025 | Shelton Larry | Director | Option exercise(M) | 2K | $4.19 | $10K |
| Sep 2, 2025 | Shelton Larry | Director | Option exercise(M) | 2K | — | $0 |
| Aug 28, 2025 | Zwecker Mark A | Director | Option exercise(M) | 2K | $4.19 | $10K |
| Aug 28, 2025 | Zwecker Mark A | Director | Option exercise(M) | 2K | — | $0 |
| Jul 24, 2025 | Wamp Zach Paul | Director | Grant(A) | 10K | — | $0 |
| Jul 24, 2025 | Reeder Joe | Director | Grant(A) | 10K | — | $0 |
| Jul 24, 2025 | Shelton Larry | Director | Grant(A) | 10K | — | $0 |
| Jul 24, 2025 | Bostick Thomas | Director | Grant(A) | 10K | — | $0 |
| Jul 24, 2025 | Grumski Joseph Timothy | Director | Grant(A) | 10K | — | $0 |
| Jul 24, 2025 | Zwecker Mark A | Director | Grant(A) | 10K | — | $0 |
| Jul 24, 2025 | Duggan Kerry C | Director | Grant(A) | 10K | — | $0 |
| Jul 14, 2025 | Grondin Richard | EVP of Hanford & Int. Waste Op | Option exercise(M) | 5K | $7.01 | $35K |
| Jul 14, 2025 | Grondin Richard | EVP of Hanford & Int. Waste Op | Tax withholding(F) | 2K | $11.32 | $24K |
| Jul 14, 2025 | Grondin Richard | EVP of Hanford & Int. Waste Op | Option exercise(M) | 6K | $3.95 | $24K |
| Jul 14, 2025 | Grondin Richard | EVP of Hanford & Int. Waste Op | Tax withholding(F) | 3K | $11.32 | $35K |
| Jul 14, 2025 | Grondin Richard | EVP of Hanford & Int. Waste Op | Option exercise(M) | 6K | — | $0 |
| Jul 14, 2025 | Grondin Richard | EVP of Hanford & Int. Waste Op | Option exercise(M) | 5K | — | $0 |
| Jul 1, 2025 | Duggan Kerry C | Director | Grant(A) | 1K | $7.89 | $9K |
| Jul 1, 2025 | Grumski Joseph Timothy | Director | Grant(A) | 2K | $7.89 | $17K |
| Jul 1, 2025 | Reeder Joe | Director | Grant(A) | 2K | $7.89 | $16K |
| Jul 1, 2025 | Shelton Larry | Director | Grant(A) | 2K | $7.89 | $15K |
| Jul 1, 2025 | Wamp Zach Paul | Director | Grant(A) | 1K | $7.89 | $9K |
| Jul 1, 2025 | Bostick Thomas | Director | Grant(A) | 2K | $7.89 | $12K |
| Jul 1, 2025 | Zwecker Mark A | Director | Grant(A) | 2K | $7.89 | $13K |
| May 30, 2025 | Duggan Kerry C | Director | Sell(S) | 17K | — | — |
| Apr 1, 2025 | Shelton Larry | Director | Grant(A) | 3K | $5.45 | $14K |
| Apr 1, 2025 | Zwecker Mark A | Director | Grant(A) | 2K | $5.45 | $12K |
| Apr 1, 2025 | Duggan Kerry C | Director | Grant(A) | 2K | $5.45 | $8K |
| Apr 1, 2025 | Wamp Zach Paul | Director | Grant(A) | 2K | $5.45 | $9K |
| Apr 1, 2025 | Reeder Joe | Director | Grant(A) | 3K | $5.45 | $15K |
| Apr 1, 2025 | Bostick Thomas | Director | Grant(A) | 2K | $5.45 | $12K |
| Apr 1, 2025 | Grumski Joseph Timothy | Director | Grant(A) | 3K | $5.45 | $17K |
| Mar 21, 2025 | Duff Mark | President and CEO, Director | Buy(P) | 650 | $7.03 | $5K |
| Mar 21, 2025 | Duff Mark | President and CEO, Director | Buy(P) | 650 | $7.05 | $5K |
| Mar 21, 2025 | Duff Mark | President and CEO, Director | Buy(P) | 750 | $7.02 | $5K |
| Mar 21, 2025 | Shelton Larry | Director | Grant(A) | 2K | $7.07 | $14K |
| Mar 21, 2025 | Naccarato Ben | Chief Financial Officer | Buy(P) | 400 | $7.00 | $3K |
| Mar 18, 2025 | Duff Mark | President and CEO, Director | Buy(P) | 500 | $7.10 | $4K |
| Mar 18, 2025 | Duff Mark | President and CEO, Director | Buy(P) | 500 | $7.20 | $4K |
| Mar 18, 2025 | Eshleman Troy | Chief Operating Officer | Buy(P) | 1K | $7.35 | $10K |
| Mar 17, 2025 | Centofanti Louis F | EVP of Strategic Initiatives, Director | Buy(P) | 1K | $7.31 | $7K |
| Jan 8, 2025 | Duff Mark | President and CEO, Director | Option exercise(M) | 25K | $3.15 | $79K |
| Jan 8, 2025 | Duff Mark | President and CEO, Director | Tax withholding(F) | 7K | $10.58 | $79K |
| Jan 8, 2025 | Duff Mark | President and CEO, Director | Option exercise(M) | 25K | — | $0 |
| Jan 8, 2025 | Naccarato Ben | Chief Financial Officer | Option exercise(M) | 15K | $3.15 | $47K |
| Jan 8, 2025 | Naccarato Ben | Chief Financial Officer | Tax withholding(F) | 4K | $10.58 | $47K |
| Jan 8, 2025 | Naccarato Ben | Chief Financial Officer | Option exercise(M) | 15K | — | $0 |
| Jan 2, 2025 | Duggan Kerry C | Director | Grant(A) | 1K | $8.30 | $8K |
| Jan 2, 2025 | Grumski Joseph Timothy | Director | Grant(A) | 2K | $8.30 | $16K |
| Jan 2, 2025 | Bostick Thomas | Director | Grant(A) | 2K | $8.30 | $12K |
| Jan 2, 2025 | Shelton Larry | Director | Grant(A) | 2K | $8.30 | $14K |
| Jan 2, 2025 | Zwecker Mark A | Director | Grant(A) | 1K | $8.30 | $12K |
| Jan 2, 2025 | Wamp Zach Paul | Director | Grant(A) | 1K | $8.30 | $9K |
| Jan 2, 2025 | Reeder Joe | Director | Grant(A) | 2K | $8.30 | $15K |
| Nov 18, 2024 | Grumski Joseph Timothy | Director | Gift(G) | 2K | — | — |
| Nov 14, 2024 | Centofanti Louis F | EVP of Strategic Initiatives, Director | Tax withholding(F) | 3K | $13.72 | $47K |
| Nov 14, 2024 | Centofanti Louis F | EVP of Strategic Initiatives, Director | Option exercise(M) | 15K | $3.15 | $47K |
| Nov 14, 2024 | Centofanti Louis F | EVP of Strategic Initiatives, Director | Option exercise(M) | 15K | — | $0 |
| Oct 1, 2024 | Bostick Thomas | Director | Grant(A) | 1K | $9.20 | $13K |
| Oct 1, 2024 | Duggan Kerry C | Director | Grant(A) | 954 | $9.20 | $9K |
| Oct 1, 2024 | Grumski Joseph Timothy | Director | Grant(A) | 2K | $9.20 | $17K |
| Oct 1, 2024 | Reeder Joe | Director | Grant(A) | 2K | $9.20 | $16K |
| Oct 1, 2024 | Shelton Larry | Director | Grant(A) | 2K | $9.20 | $15K |
| Oct 1, 2024 | Zwecker Mark A | Director | Grant(A) | 1K | $9.20 | $12K |
| Oct 1, 2024 | Wamp Zach Paul | Director | Grant(A) | 989 | $9.20 | $9K |
| Sep 9, 2024 | Zwecker Mark A | Director | Option exercise(M) | 2K | $3.70 | $9K |
| Sep 9, 2024 | Zwecker Mark A | Director | Option exercise(M) | 2K | — | $0 |
| Sep 4, 2024 | Duff Mark | President and CEO, Director | Buy(P) | 500 | $9.91 | $5K |
| Sep 4, 2024 | Duff Mark | President and CEO, Director | Buy(P) | 350 | $9.95 | $3K |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).