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 |
|---|---|---|---|---|---|---|
| Jul 9, 2026 | Hudson Daniel Timothy | Director | Buy(P) | 3K | $16.60 | $42K |
| Jul 9, 2026 | Hudson Daniel Timothy | Director | Buy(P) | 3K | $16.57 | $41K |
| Jun 29, 2026 | Hudson Daniel Timothy | Director | Buy(P) | 5K | $16.90 | $85K |
| Jun 29, 2026 | Hudson Daniel Timothy | Director | Buy(P) | 5K | $16.98 | $85K |
| Jun 25, 2026 | Hudson Daniel Timothy | Director | Buy(P) | 2K | $17.70 | $35K |
| Jun 24, 2026 | Hudson Daniel Timothy | Director | Buy(P) | 3K | $17.04 | $51K |
| Jun 23, 2026 | Telesz Todd E | Chief Financial Officer | Option exercise(M) | 8K | $17.73 | $146K |
| Jun 23, 2026 | Telesz Todd E | Chief Financial Officer | Tax withholding(F) | 3K | $17.73 | $46K |
| Jun 23, 2026 | Telesz Todd E | Chief Financial Officer | Option exercise(M) | 8K | — | — |
| Jun 16, 2026 | Wesley Charles Ray IV | Director | Buy(P) | 15K | $16.69 | $250K |
| May 28, 2026 | Lubar David J | Director, 10% Owner | Grant(A) | 6K | — | — |
| May 28, 2026 | Wesley Charles Ray IV | Director | Grant(A) | 6K | — | — |
| May 28, 2026 | Sugg Barbara Ann | Director | Grant(A) | 5K | — | — |
| May 28, 2026 | Hudson Daniel Timothy | Director | Grant(A) | 5K | — | — |
| May 28, 2026 | Gray Zarrell Thomas | Director | Grant(A) | 6K | — | — |
| Apr 15, 2026 | Bilsland Brent K | President and CEO, Director | Grant(A) | 70K | — | — |
| Apr 15, 2026 | Lovell Heath Aaron | Chief Operating Officer | Grant(A) | 23K | — | — |
| Apr 15, 2026 | Telesz Todd E | Chief Financial Officer | Grant(A) | 16K | — | — |
| Mar 31, 2026 | Bilsland Brent K | President and CEO, Director | Option exercise(M) | 105K | — | — |
| Mar 31, 2026 | Lovell Heath Aaron | Chief Operating Officer | Option exercise(M) | 41K | $16.28 | $665K |
| Mar 10, 2026 | Van Deman Eric Matthew | Chief Accounting Officer | Grant(A) | 10K | — | — |
| Jan 14, 2026 | Gray Zarrell Thomas | Director | Other(J) | 14K | $18.00 | $250K |
| Jan 14, 2026 | Wesley Charles Ray IV | Director | Other(J) | 56K | $18.00 | $1000K |
| Dec 31, 2025 | Hardie David C | Director | Grant(A) | 2K | $19.29 | $37K |
| Dec 30, 2025 | Wesley Charles Ray IV | Director | Grant(A) | 3K | $19.29 | $50K |
| Dec 30, 2025 | Lubar David J | Director, 10% Owner | Grant(A) | 3K | $19.29 | $55K |
| Dec 30, 2025 | Gray Zarrell Thomas | Director | Grant(A) | 3K | $19.29 | $50K |
| Dec 17, 2025 | Wesley Charles Ray IV | Director | Buy(P) | 20K | $17.83 | $357K |
| Nov 21, 2025 | Wesley Charles Ray IV | Director | Buy(P) | 13K | $19.28 | $251K |
| Oct 1, 2025 | Hardie David C | Director | Sell(S) | 25K | $19.76 | $494K |
| Oct 1, 2025 | Hardie David C | Director | Sell(S) | 75K | $19.76 | $1.5M |
| Sep 30, 2025 | Hardie David C | Director | Sell(S) | 75K | $19.53 | $1.5M |
| Sep 30, 2025 | Hardie David C | Director | Sell(S) | 25K | $19.53 | $488K |
| Sep 29, 2025 | Hardie David C | Director | Sell(S) | 55K | $19.65 | $1.1M |
| Sep 29, 2025 | Hardie David C | Director | Sell(S) | 18K | $19.65 | $362K |
| Sep 26, 2025 | Hardie David C | Director | Sell(S) | 19K | $19.18 | $373K |
| Sep 26, 2025 | Hardie David C | Director | Sell(S) | 58K | $19.18 | $1.1M |
| Sep 26, 2025 | Telesz Todd E | Chief Financial Officer | Grant(A) | 25K | — | — |
| Sep 25, 2025 | Hardie David C | Director | Sell(S) | 9K | $19.82 | $173K |
| Sep 25, 2025 | Hardie David C | Director | Sell(S) | 26K | $19.82 | $520K |
| Sep 23, 2025 | Hardie David C | Director | Sell(S) | 2K | $19.08 | $42K |
| Sep 23, 2025 | Hardie David C | Director | Sell(S) | 7K | $19.08 | $125K |
| Sep 22, 2025 | Hardie David C | Director | Sell(S) | 57K | $19.25 | $1.1M |
| Sep 22, 2025 | Hardie David C | Director | Sell(S) | 19K | $19.25 | $369K |
| Aug 19, 2025 | Wesley Charles Ray IV | Director | Buy(P) | 20K | $15.27 | $305K |
| May 19, 2025 | Hardie David C | Director | Sell(S) | 67K | $19.05 | $1.3M |
| May 19, 2025 | Hardie David C | Director | Sell(S) | 30K | $19.05 | $579K |
| Apr 10, 2025 | Gray Zarrell Thomas | Director | Buy(P) | 9K | $13.60 | $122K |
| Apr 7, 2025 | Wesley Charles Ray IV | Director | Buy(P) | 10K | $10.40 | $104K |
| Mar 31, 2025 | Hargrave Marjorie Anne | Chief Financial Officer | Option exercise(M) | 30K | $12.28 | $372K |
| Mar 31, 2025 | Hargrave Marjorie Anne | Chief Financial Officer | Option exercise(M) | 7K | — | — |
| Mar 31, 2025 | Hargrave Marjorie Anne | Chief Financial Officer | Option exercise(M) | 23K | — | — |
| Mar 31, 2025 | Lovell Heath Aaron | President-Hallador Power | Tax withholding(F) | 37K | $12.28 | $453K |
| Mar 31, 2025 | Bilsland Brent K | President and CEO, Director | Tax withholding(F) | 56K | $12.28 | $686K |
| Mar 31, 2025 | Bilsland Brent K | President and CEO, Director | Option exercise(M) | 105K | $16.28 | $1.7M |
| Mar 31, 2025 | Bilsland Brent K | President and CEO, Director | Tax withholding(F) | 46K | $16.28 | $748K |
| Mar 31, 2025 | Lovell Heath Aaron | Chief Operating Officer | Tax withholding(F) | 18K | $16.28 | $295K |
| Mar 31, 2025 | Lovell Heath Aaron | Chief Operating Officer | Option exercise(M) | 41K | — | — |
| Dec 17, 2024 | Wesley Charles Ray IV | Director | Other(J) | 2K | $12.01 | $19K |
| Dec 10, 2024 | Hardie David C | Director | Sell(S) | 16K | $13.10 | $213K |
| Dec 9, 2024 | Hardie David C | Director | Sell(S) | 19K | $13.02 | $244K |
| Dec 6, 2024 | Hardie David C | Director | Sell(S) | 3K | $13.01 | $33K |
| Nov 25, 2024 | Hardie David C | Director | Sell(S) | 12K | $13.21 | $164K |
| Nov 22, 2024 | Hardie David C | Director | Sell(S) | 33K | $13.05 | $435K |
| Nov 21, 2024 | Hardie David C | Director | Sell(S) | 2K | $13.05 | $23K |
| Nov 20, 2024 | Hardie David C | Director | Sell(S) | 15K | $13.02 | $194K |
| Nov 19, 2024 | Hardie David C | Director | Sell(S) | 388 | $12.91 | $5K |
| Nov 18, 2024 | Hardie David C | Director | Sell(S) | 24K | $13.11 | $309K |
| Nov 15, 2024 | Hardie David C | Director | Sell(S) | 45K | $12.88 | $576K |
| Oct 7, 2024 | Wesley Charles Ray IV | Director | Other(J) | 19K | $6.89 | $131K |
| Sep 6, 2024 | Lovell Heath Aaron | President-Hallador Power | Grant(A) | 123K | — | — |
| Sep 6, 2024 | Bilsland Brent K | President and CEO, Director | Grant(A) | 315K | — | — |
| Sep 6, 2024 | Hargrave Marjorie Anne | Chief Financial Officer | Grant(A) | 70K | — | — |
| Sep 6, 2024 | Wesley Charles Ray IV | Director | Buy(P) | 25K | $5.97 | $149K |
| Aug 31, 2024 | Lubar David J | Director, 10% Owner | Other(J) | 272K | — | $0 |
| Aug 31, 2024 | Lubar David J | Director, 10% Owner | Other(J) | 272K | — | $0 |
| Aug 29, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 2K | $6.50 | $13K |
| Aug 26, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 4K | $6.22 | $25K |
| Aug 26, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 5K | $6.39 | $32K |
| Aug 26, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 5K | $6.43 | $32K |
| Aug 22, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 5K | $5.75 | $29K |
| Aug 16, 2024 | Wesley Charles Ray IV | Director | Buy(P) | 5K | $5.77 | $29K |
| Aug 15, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 5K | $6.05 | $30K |
| Aug 12, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 5K | $5.60 | $28K |
| Aug 12, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 5K | $5.40 | $27K |
| Jun 28, 2024 | Hardie David C | Director | Conversion(C) | 190K | — | — |
| Jun 28, 2024 | Hardie David C | Director | Conversion(C) | 190K | — | — |
| Jun 26, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 1K | $7.00 | $7K |
| Jun 12, 2024 | Gray Zarrell Thomas | Director | Buy(P) | 1K | $7.75 | $8K |
| Apr 30, 2024 | Martin Lawrence D | Insider | Tax withholding(F) | 26K | $5.11 | $132K |
| Apr 30, 2024 | Martin Lawrence D | Insider | Option exercise(M) | 58K | $5.11 | $296K |
| Apr 30, 2024 | Martin Lawrence D | Insider | Option exercise(M) | 58K | — | — |
| Apr 1, 2024 | Martin Lawrence D | CFO | Option exercise(M) | 58K | $5.33 | $309K |
| Apr 1, 2024 | Martin Lawrence D | CFO | Tax withholding(F) | 26K | $5.33 | $137K |
| Apr 1, 2024 | Martin Lawrence D | CFO | Option exercise(M) | 58K | — | — |
| Apr 1, 2024 | Bilsland Brent K | President and CEO, Director | Option exercise(M) | 89K | $5.33 | $475K |
| Apr 1, 2024 | Bilsland Brent K | President and CEO, Director | Tax withholding(F) | 39K | $5.33 | $208K |
| Apr 1, 2024 | Bilsland Brent K | President and CEO, Director | Option exercise(M) | 89K | — | — |
| Apr 1, 2024 | Lovell Heath Aaron | Insider | Option exercise(M) | 58K | $5.33 | $309K |
| Apr 1, 2024 | Lovell Heath Aaron | Insider | Tax withholding(F) | 22K | $5.33 | $119K |
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 2021-04-26 → 2026-07-11. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).