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 |
|---|---|---|---|---|---|---|
| Jun 15, 2026 | Abbas Gizman I | Director | Sell(S) | 3K | $380.00 | $988K |
| Jun 8, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Other(J) | 260K | — | $0 |
| Jun 8, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Other(J) | 260K | — | $0 |
| May 22, 2026 | Abbas Gizman I | Director | Option exercise(M) | 4K | — | — |
| May 22, 2026 | Abbas Gizman I | Director | Disposed to issuer(D) | 2K | $324.21 | $496K |
| May 22, 2026 | Abbas Gizman I | Director | Option exercise(M) | 4K | — | $0 |
| May 22, 2026 | Berryman Brad | Chief Operating Officer | Option exercise(M) | 8K | — | — |
| May 22, 2026 | Berryman Brad | Chief Operating Officer | Option exercise(M) | 91K | — | — |
| May 22, 2026 | Berryman Brad | Chief Operating Officer | Tax withholding(F) | 43K | $324.21 | $14.0M |
| May 22, 2026 | Berryman Brad | Chief Operating Officer | Option exercise(M) | 21K | — | $0 |
| May 22, 2026 | Berryman Brad | Chief Operating Officer | Option exercise(M) | 227K | — | $0 |
| May 22, 2026 | Casulli Edward T. | SVP & Chief Nuclear Officer | Option exercise(M) | 3K | — | — |
| May 22, 2026 | Casulli Edward T. | SVP & Chief Nuclear Officer | Option exercise(M) | 4K | — | — |
| May 22, 2026 | Casulli Edward T. | SVP & Chief Nuclear Officer | Tax withholding(F) | 3K | $324.21 | $899K |
| May 22, 2026 | Casulli Edward T. | SVP & Chief Nuclear Officer | Option exercise(M) | 6K | — | $0 |
| May 22, 2026 | Casulli Edward T. | SVP & Chief Nuclear Officer | Option exercise(M) | 10K | — | $0 |
| May 22, 2026 | Horton Anthony R | Director | Option exercise(M) | 4K | — | — |
| May 22, 2026 | Horton Anthony R | Director | Option exercise(M) | 4K | — | $0 |
| May 22, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Option exercise(M) | 30K | — | — |
| May 22, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Option exercise(M) | 325K | — | — |
| May 22, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Tax withholding(F) | 140K | $324.21 | $45.3M |
| May 22, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Option exercise(M) | 74K | — | $0 |
| May 22, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Option exercise(M) | 813K | — | $0 |
| May 22, 2026 | Hyde Karen T | Director | Option exercise(M) | 4K | — | — |
| May 22, 2026 | Hyde Karen T | Director | Disposed to issuer(D) | 2K | $324.21 | $496K |
| May 22, 2026 | Hyde Karen T | Director | Option exercise(M) | 4K | — | $0 |
| May 22, 2026 | Lebsack Dale E Jr. | Chief Asset Dev. Officer | Option exercise(M) | 7K | — | — |
| May 22, 2026 | Lebsack Dale E Jr. | Chief Asset Dev. Officer | Option exercise(M) | 78K | — | — |
| May 22, 2026 | Lebsack Dale E Jr. | Chief Asset Dev. Officer | Tax withholding(F) | 34K | $324.21 | $10.9M |
| May 22, 2026 | Lebsack Dale E Jr. | Chief Asset Dev. Officer | Option exercise(M) | 18K | — | $0 |
| May 22, 2026 | Lebsack Dale E Jr. | Chief Asset Dev. Officer | Option exercise(M) | 196K | — | $0 |
| May 22, 2026 | Morice Christopher E | Chief Commercial Officer | Option exercise(M) | 6K | — | — |
| May 22, 2026 | Morice Christopher E | Chief Commercial Officer | Option exercise(M) | 61K | — | — |
| May 22, 2026 | Morice Christopher E | Chief Commercial Officer | Tax withholding(F) | 26K | $324.21 | $8.6M |
| May 22, 2026 | Morice Christopher E | Chief Commercial Officer | Option exercise(M) | 14K | — | $0 |
| May 22, 2026 | Morice Christopher E | Chief Commercial Officer | Option exercise(M) | 154K | — | $0 |
| May 22, 2026 | Muller Cole | Chief Financial Officer | Option exercise(M) | 5K | — | — |
| May 22, 2026 | Muller Cole | Chief Financial Officer | Option exercise(M) | 58K | — | — |
| May 22, 2026 | Muller Cole | Chief Financial Officer | Tax withholding(F) | 27K | $324.21 | $8.9M |
| May 22, 2026 | Muller Cole | Chief Financial Officer | Option exercise(M) | 13K | — | $0 |
| May 22, 2026 | Muller Cole | Chief Financial Officer | Option exercise(M) | 144K | — | $0 |
| May 22, 2026 | Schwartzstein Christine Benson | Director | Option exercise(M) | 4K | — | — |
| May 22, 2026 | Schwartzstein Christine Benson | Director | Option exercise(M) | 4K | — | $0 |
| May 22, 2026 | Schaefer Stephen | Director | Option exercise(M) | 4K | — | — |
| May 22, 2026 | Schaefer Stephen | Director | Option exercise(M) | 18K | — | — |
| May 22, 2026 | Schaefer Stephen | Director | Disposed to issuer(D) | 7K | $324.21 | $2.2M |
| May 22, 2026 | Schaefer Stephen | Director | Option exercise(M) | 4K | — | $0 |
| May 22, 2026 | Schaefer Stephen | Director | Option exercise(M) | 46K | — | $0 |
| May 22, 2026 | Nigro Joseph | Director | Option exercise(M) | 4K | — | — |
| May 22, 2026 | Nigro Joseph | Director | Disposed to issuer(D) | 2K | $324.21 | $496K |
| May 22, 2026 | Nigro Joseph | Director | Option exercise(M) | 4K | — | $0 |
| May 22, 2026 | Nutt Terry L | President | Option exercise(M) | 91K | — | — |
| May 22, 2026 | Nutt Terry L | President | Tax withholding(F) | 36K | $324.21 | $11.6M |
| May 22, 2026 | Nutt Terry L | President | Option exercise(M) | 227K | — | $0 |
| May 22, 2026 | Olagues Darren J | Chief Development Officer | Option exercise(M) | 7K | — | — |
| May 22, 2026 | Olagues Darren J | Chief Development Officer | Tax withholding(F) | 3K | $324.21 | $944K |
| May 22, 2026 | Olagues Darren J | Chief Development Officer | Option exercise(M) | 18K | — | $0 |
| May 22, 2026 | Plagens Anthony J | SVP & Chief Accounting Officer | Option exercise(M) | 2K | — | — |
| May 22, 2026 | Plagens Anthony J | SVP & Chief Accounting Officer | Option exercise(M) | 3K | — | — |
| May 22, 2026 | Plagens Anthony J | SVP & Chief Accounting Officer | Tax withholding(F) | 2K | $324.21 | $723K |
| May 22, 2026 | Plagens Anthony J | SVP & Chief Accounting Officer | Option exercise(M) | 6K | — | $0 |
| May 22, 2026 | Plagens Anthony J | SVP & Chief Accounting Officer | Option exercise(M) | 9K | — | $0 |
| May 22, 2026 | Wright Andrew M | Chief Administrative Officer | Option exercise(M) | 8K | — | — |
| May 22, 2026 | Wright Andrew M | Chief Administrative Officer | Option exercise(M) | 88K | — | — |
| May 22, 2026 | Wright Andrew M | Chief Administrative Officer | Tax withholding(F) | 38K | $324.21 | $12.2M |
| May 22, 2026 | Wright Andrew M | Chief Administrative Officer | Option exercise(M) | 20K | — | $0 |
| May 22, 2026 | Wright Andrew M | Chief Administrative Officer | Option exercise(M) | 219K | — | $0 |
| Feb 26, 2026 | Nutt Terry L | President | Grant(A) | 33K | — | $0 |
| Feb 26, 2026 | Nutt Terry L | President | Grant(A) | 7K | — | $0 |
| Feb 26, 2026 | Nigro Joseph | Director | Grant(A) | 448 | — | $0 |
| Feb 26, 2026 | Horton Anthony R | Director | Grant(A) | 448 | — | $0 |
| Feb 26, 2026 | Abbas Gizman I | Director | Grant(A) | 448 | — | $0 |
| Feb 26, 2026 | Berryman Brad | Chief Operating Officer | Grant(A) | 16K | — | $0 |
| Feb 26, 2026 | Berryman Brad | Chief Operating Officer | Grant(A) | 3K | — | $0 |
| Feb 26, 2026 | Schwartzstein Christine Benson | Director | Grant(A) | 448 | — | $0 |
| Feb 26, 2026 | Casulli Edward T. | SVP & Chief Nuclear Officer | Grant(A) | 4K | — | $0 |
| Feb 26, 2026 | Casulli Edward T. | SVP & Chief Nuclear Officer | Grant(A) | 11K | — | $0 |
| Feb 26, 2026 | Plagens Anthony J | SVP & Chief Accounting Officer | Grant(A) | 4K | — | $0 |
| Feb 26, 2026 | Plagens Anthony J | SVP & Chief Accounting Officer | Grant(A) | 1K | — | $0 |
| Feb 26, 2026 | Hyde Karen T | Director | Grant(A) | 448 | — | $0 |
| Feb 26, 2026 | Lebsack Dale E Jr. | Chief Asset Dev. Officer | Grant(A) | 16K | — | $0 |
| Feb 26, 2026 | Lebsack Dale E Jr. | Chief Asset Dev. Officer | Grant(A) | 3K | — | $0 |
| Feb 26, 2026 | Wright Andrew M | Chief Administrative Officer | Grant(A) | 3K | — | $0 |
| Feb 26, 2026 | Wright Andrew M | Chief Administrative Officer | Grant(A) | 16K | — | $0 |
| Feb 26, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Grant(A) | 13K | — | $0 |
| Feb 26, 2026 | McFarland Mark Allen | Chief Executive Officer, Director | Grant(A) | 58K | — | $0 |
| Feb 26, 2026 | Schaefer Stephen | Director | Grant(A) | 1K | — | $0 |
| Feb 26, 2026 | Morice Christopher E | Chief Commercial Officer | Grant(A) | 3K | — | $0 |
| Feb 26, 2026 | Morice Christopher E | Chief Commercial Officer | Grant(A) | 16K | — | $0 |
| Feb 26, 2026 | Olagues Darren J | Chief Development Officer | Grant(A) | 16K | — | $0 |
| Feb 26, 2026 | Olagues Darren J | Chief Development Officer | Grant(A) | 3K | — | $0 |
| Feb 26, 2026 | Muller Cole | Chief Financial Officer | Grant(A) | 26K | — | $0 |
| Feb 26, 2026 | Muller Cole | Chief Financial Officer | Grant(A) | 6K | — | $0 |
| Jul 18, 2025 | Nutt Terry L | CFO | Tax withholding(F) | 8K | $267.62 | $2.2M |
| Jul 18, 2025 | Nutt Terry L | CFO | Option exercise(M) | 21K | — | — |
| Jul 18, 2025 | Nutt Terry L | CFO | Option exercise(M) | 21K | — | $0 |
| Jun 27, 2025 | Rubric Capital Management LP | 10% Owner | Sell(S) | 8K | $292.82 | $2.3M |
| Jun 27, 2025 | Rubric Capital Management LP | 10% Owner | Sell(S) | 2K | $293.34 | $694K |
| Jun 27, 2025 | Rubric Capital Management LP | 10% Owner | Sell(S) | 12K | $294.65 | $3.6M |
| Jun 27, 2025 | Rubric Capital Management LP | 10% Owner | Sell(S) | 52K | $295.62 | $15.3M |
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.
Coverage: Form 4 filings indexed 2021-03-29 → 2026-07-14. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).