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 30, 2026 | Durkin Marian M | Director | Grant(A) | 152 | — | $0 |
| Jun 30, 2026 | Dosch Vernon A. | Director | Grant(A) | 1K | — | $0 |
| Mar 31, 2026 | Durkin Marian M | Director | Grant(A) | 157 | — | $0 |
| Mar 31, 2026 | Dosch Vernon A. | Director | Grant(A) | 1K | — | $0 |
| Feb 18, 2026 | Johnson Rob L. | President-WBI | Tax withholding(F) | 11K | $20.36 | $216K |
| Feb 18, 2026 | Jones Anne M | ChiefHRSafety&AdminOfficer | Tax withholding(F) | 12K | $20.36 | $245K |
| Feb 18, 2026 | Kivisto Nicole A | President & CEO, Director | Tax withholding(F) | 36K | $20.36 | $726K |
| Feb 18, 2026 | Senger Garret | Chief Utilities Officer | Tax withholding(F) | 8K | $20.36 | $166K |
| Feb 18, 2026 | Sievert Stephanie A | ChiefAccntg&RegAffairsOfficer | Tax withholding(F) | 10K | $20.36 | $213K |
| Feb 18, 2026 | Vollmer Jason L | CFO | Tax withholding(F) | 37K | $20.36 | $749K |
| Feb 17, 2026 | Johnson Rob L. | President-WBI | Grant(A) | 6K | — | $0 |
| Feb 17, 2026 | Jones Anne M | ChiefHRSafety&AdminOfficer | Grant(A) | 6K | — | $0 |
| Feb 17, 2026 | Kivisto Nicole A | President & CEO, Director | Grant(A) | 45K | — | $0 |
| Feb 17, 2026 | Senger Garret | Chief Utilities Officer | Grant(A) | 7K | — | $0 |
| Feb 17, 2026 | Sievert Stephanie A | ChiefAccntg&RegAffairsOfficer | Grant(A) | 5K | — | $0 |
| Feb 17, 2026 | Vollmer Jason L | CFO | Grant(A) | 15K | — | $0 |
| Feb 17, 2026 | Boese Dyke A. | CIO | Grant(A) | 4K | — | $0 |
| Feb 17, 2026 | Foti Anthony Donald | CLO & Corporate Secretary | Grant(A) | 8K | — | $0 |
| Feb 13, 2026 | Kelley Charles M | Director | Buy(P) | 5K | $20.85 | $104K |
| Dec 31, 2025 | Dosch Vernon A. | Director | Grant(A) | 1K | — | $0 |
| Dec 31, 2025 | Durkin Marian M | Director | Grant(A) | 164 | — | $0 |
| Nov 13, 2025 | Dosch Vernon A. | Director | Grant(A) | 7K | — | $0 |
| Nov 13, 2025 | Anderson Darrel T | Director | Grant(A) | 8K | — | $0 |
| Nov 13, 2025 | Durkin Marian M | Director | Grant(A) | 7K | — | $0 |
| Nov 13, 2025 | Jaeger Douglas W. | Director | Grant(A) | 7K | — | $0 |
| Nov 13, 2025 | Johnson Dennis W | Director | Grant(A) | 8K | — | $0 |
| Nov 13, 2025 | Kelley Charles M | Director | Grant(A) | 3K | — | $0 |
| Nov 13, 2025 | Miller Tammy J | Director | Grant(A) | 3K | — | $0 |
| Nov 13, 2025 | Patel Priti Rashmikant | Director | Grant(A) | 5K | — | $0 |
| Sep 30, 2025 | Dosch Vernon A. | Director | Grant(A) | 2K | — | $0 |
| Sep 30, 2025 | Durkin Marian M | Director | Grant(A) | 182 | — | $0 |
| Sep 8, 2025 | Vollmer Jason L | CFO | Buy(P) | 5K | $16.08 | $80K |
| Aug 19, 2025 | Vollmer Jason L | CFO | Buy(P) | 5K | $16.28 | $81K |
| Jun 30, 2025 | Durkin Marian M | Director | Grant(A) | 175 | — | $0 |
| Jun 30, 2025 | Dosch Vernon A. | Director | Grant(A) | 2K | — | $0 |
| May 15, 2025 | Boese Dyke A. | CIO | Discretionary(I) | 8K | $16.99 | $132K |
| Mar 31, 2025 | Dosch Vernon A. | Director | Grant(A) | 2K | — | $0 |
| Mar 31, 2025 | Durkin Marian M | Director | Grant(A) | 165 | — | $0 |
| Feb 12, 2025 | Boese Dyke A. | CIO | Grant(A) | 3K | — | $0 |
| Feb 12, 2025 | Foti Anthony Donald | CLO & Corporate Secretary | Grant(A) | 8K | — | $0 |
| Feb 12, 2025 | Johnson Rob L. | President-WBI | Grant(A) | 6K | — | $0 |
| Feb 12, 2025 | Johnson Rob L. | President-WBI | Tax withholding(F) | 7K | $16.83 | $114K |
| Feb 12, 2025 | Jones Anne M | ChiefHRAdmin&SafetyOfficer | Tax withholding(F) | 11K | $16.83 | $181K |
| Feb 12, 2025 | Jones Anne M | ChiefHRAdmin&SafetyOfficer | Grant(A) | 6K | — | $0 |
| Feb 12, 2025 | Kivisto Nicole A | President & CEO, Director | Grant(A) | 46K | — | $0 |
| Feb 12, 2025 | Kivisto Nicole A | President & CEO, Director | Tax withholding(F) | 30K | $16.83 | $510K |
| Feb 12, 2025 | Senger Garret | Chief Utilities Officer | Grant(A) | 8K | — | $0 |
| Feb 12, 2025 | Senger Garret | Chief Utilities Officer | Tax withholding(F) | 7K | $16.83 | $126K |
| Feb 12, 2025 | Sievert Stephanie A | ChiefAccntg&RegAffairsOfficer | Grant(A) | 5K | — | $0 |
| Feb 12, 2025 | Sievert Stephanie A | ChiefAccntg&RegAffairsOfficer | Tax withholding(F) | 10K | $16.83 | $160K |
| Feb 12, 2025 | Vollmer Jason L | CFO | Tax withholding(F) | 30K | $16.83 | $512K |
| Feb 12, 2025 | Vollmer Jason L | CFO | Grant(A) | 17K | — | $0 |
| Feb 10, 2025 | Johnson Dennis W | Director | Buy(P) | 30K | $16.64 | $499K |
| Nov 15, 2024 | Anderson Darrel T | Director | Grant(A) | 8K | — | $0 |
| Nov 15, 2024 | Dosch Vernon A. | Director | Grant(A) | 1K | — | $0 |
| Nov 15, 2024 | Durkin Marian M | Director | Grant(A) | 3K | — | $0 |
| Nov 15, 2024 | Jaeger Douglas W. | Director | Grant(A) | 5K | — | $0 |
| Nov 15, 2024 | Johnson Dennis W | Director | Grant(A) | 10K | — | $0 |
| Nov 15, 2024 | Wang Chenxi | Director | Grant(A) | 8K | — | $0 |
| Oct 31, 2024 | Sparby David M | Director | Grant(A) | 371 | $29.22 | $11K |
| Sep 30, 2024 | Sparby David M | Director | Grant(A) | 1K | $27.50 | $33K |
| Jun 28, 2024 | Sparby David M | Director | Grant(A) | 1K | $25.12 | $33K |
| May 7, 2024 | Johnson Rob L. | President-WBI Holdings | Buy(P) | 36K | $25.46 | $924K |
| Mar 29, 2024 | Sparby David M | Director | Grant(A) | 1K | $24.83 | $32K |
| Mar 12, 2024 | Rosenthal Dale | Director | Buy(P) | 375 | $22.55 | $8K |
| Feb 22, 2024 | Jones Anne M | VP & CHRO | Discretionary(I) | 11K | $20.86 | $222K |
| Feb 15, 2024 | Sievert Stephanie A | VP, CAO & Controller | Grant(A) | 15K | — | $0 |
| Feb 15, 2024 | Sievert Stephanie A | VP, CAO & Controller | Tax withholding(F) | 4K | $20.85 | $80K |
| Feb 15, 2024 | Goodin David L | Director | Tax withholding(F) | 47K | $20.85 | $987K |
| Feb 15, 2024 | Jones Anne M | VP & CHRO | Tax withholding(F) | 4K | $20.85 | $87K |
| Feb 15, 2024 | Jones Anne M | VP & CHRO | Grant(A) | 20K | — | $0 |
| Feb 15, 2024 | Kivisto Nicole A | President & CEO, Director | Grant(A) | 134K | — | $0 |
| Feb 15, 2024 | Kivisto Nicole A | President & CEO, Director | Tax withholding(F) | 13K | $20.85 | $261K |
| Feb 15, 2024 | Thiede Jeffrey S | President & CEO MDU CSG | Tax withholding(F) | 12K | $20.85 | $251K |
| Feb 15, 2024 | Thiede Jeffrey S | President & CEO MDU CSG | Grant(A) | 55K | — | $0 |
| Feb 15, 2024 | Vollmer Jason L | VP & CFO | Tax withholding(F) | 12K | $20.85 | $252K |
| Feb 15, 2024 | Vollmer Jason L | VP & CFO | Grant(A) | 56K | — | $0 |
| Feb 15, 2024 | Link Margaret A | VP and CIO | Grant(A) | 16K | — | $0 |
| Feb 15, 2024 | Link Margaret A | VP and CIO | Tax withholding(F) | 4K | $20.85 | $85K |
| Feb 15, 2024 | Sanderson Paul R. | VP, CLO & Secretary | Grant(A) | 21K | — | $0 |
| Feb 15, 2024 | Johnson Rob L. | President-WBI Holdings | Grant(A) | 16K | — | $0 |
| Feb 15, 2024 | Johnson Rob L. | President-WBI Holdings | Tax withholding(F) | 2K | $20.85 | $52K |
| Feb 15, 2024 | Senger Garret | Chief Utilities Officer | Tax withholding(F) | 3K | $20.85 | $60K |
| Feb 15, 2024 | Senger Garret | Chief Utilities Officer | Grant(A) | 25K | — | $0 |
| Jan 5, 2024 | Goodin David L | Director | Disposed to issuer(D) | 100K | — | $0 |
| Nov 16, 2023 | Anderson Darrel T | Director | Grant(A) | 1K | $18.73 | $25K |
| Nov 15, 2023 | Johnson Dennis W | Director | Grant(A) | 9K | $18.73 | $175K |
| Nov 15, 2023 | Gemmel James H. | Director | Grant(A) | 8K | $18.73 | $150K |
| Nov 15, 2023 | Rosenthal Dale | Director | Grant(A) | 8K | $18.73 | $150K |
| Nov 15, 2023 | Ryan Edward A | Director | Grant(A) | 8K | $18.73 | $150K |
| Nov 15, 2023 | Sparby David M | Director | Grant(A) | 8K | $18.73 | $150K |
| Nov 15, 2023 | Wang Chenxi | Director | Grant(A) | 8K | $18.73 | $150K |
| Jul 11, 2023 | Johnson Rob L. | President-WBI Holdings | Grant(A) | 4K | — | $0 |
| Jul 11, 2023 | Sanderson Paul R. | VP, CLO & Secretary | Grant(A) | 17K | — | $0 |
| May 31, 2023 | Goodin David L | President & CEO, Director | Grant(A) | 52K | — | $0 |
| May 31, 2023 | Goodin David L | President & CEO, Director | Grant(A) | 72K | — | $0 |
| May 31, 2023 | Barth Stephanie A | VP, CAO & Controller | Grant(A) | 5K | — | $0 |
| May 31, 2023 | Barth Stephanie A | VP, CAO & Controller | Grant(A) | 6K | — | $0 |
| May 31, 2023 | Link Margaret A | VP and CIO | Grant(A) | 5K | — | $0 |
| May 31, 2023 | Link Margaret A | VP and CIO | Grant(A) | 6K | — | $0 |
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 → 2026-07-11. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).