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 |
|---|---|---|---|---|---|---|
| May 19, 2026 | Evans Andrew W | Director | Grant(A) | 4K | — | $0 |
| May 19, 2026 | Nielsen Steven E | Director | Grant(A) | 5K | — | $0 |
| May 19, 2026 | DeMaria Dustin | Director | Grant(A) | 8K | — | $0 |
| May 19, 2026 | Haller Karen S | Director | Grant(A) | 4K | — | $0 |
| May 19, 2026 | Dill Julie | Director | Grant(A) | 4K | — | $0 |
| May 19, 2026 | Krummel Christopher A | Director | Grant(A) | 4K | — | $0 |
| May 19, 2026 | Patton Charles R. | Director | Grant(A) | 4K | — | $0 |
| May 19, 2026 | Mariucci Anne L | Director | Grant(A) | 4K | — | $0 |
| May 18, 2026 | Evans Andrew W | Director | Option exercise(M) | 7K | — | $0 |
| May 18, 2026 | Evans Andrew W | Director | Option exercise(M) | 7K | — | — |
| May 18, 2026 | Haller Karen S | Director | Option exercise(M) | 7K | — | — |
| May 18, 2026 | Haller Karen S | Director | Option exercise(M) | 7K | — | $0 |
| May 18, 2026 | Dill Julie | Director | Option exercise(M) | 7K | — | — |
| May 18, 2026 | Dill Julie | Director | Option exercise(M) | 7K | — | $0 |
| May 18, 2026 | Krummel Christopher A | Director | Option exercise(M) | 7K | — | — |
| May 18, 2026 | Krummel Christopher A | Director | Option exercise(M) | 7K | — | $0 |
| May 18, 2026 | Patton Charles R. | Director | Option exercise(M) | 7K | — | — |
| May 18, 2026 | Patton Charles R. | Director | Option exercise(M) | 7K | — | $0 |
| May 18, 2026 | Mariucci Anne L | Director | Option exercise(M) | 7K | — | — |
| May 18, 2026 | Mariucci Anne L | Director | Option exercise(M) | 7K | — | $0 |
| Feb 25, 2026 | Izenstark Gregory A. | Chief Financial Officer | Tax withholding(F) | 3K | $30.96 | $89K |
| Feb 25, 2026 | Chilton Kendra | SVP, Chief Accounting Officer | Tax withholding(F) | 454 | $30.96 | $14K |
| Feb 25, 2026 | Wilcock Jason S. | See Remarks | Tax withholding(F) | 2K | $30.96 | $61K |
| Feb 25, 2026 | Brown Christian | Chief Executive Officer, Director | Tax withholding(F) | 5K | $30.96 | $151K |
| Feb 17, 2026 | Wilcock Jason S. | See Remarks | Option exercise(M) | 11K | — | — |
| Feb 17, 2026 | Wilcock Jason S. | See Remarks | Grant(A) | 9K | — | $0 |
| Feb 17, 2026 | Wilcock Jason S. | See Remarks | Option exercise(M) | 11K | — | $0 |
| Feb 17, 2026 | Brown Christian | Chief Executive Officer, Director | Grant(A) | 46K | — | $0 |
| Feb 17, 2026 | Brown Christian | Chief Executive Officer, Director | Option exercise(M) | 31K | — | — |
| Feb 17, 2026 | Brown Christian | Chief Executive Officer, Director | Option exercise(M) | 31K | — | $0 |
| Feb 17, 2026 | Izenstark Gregory A. | Chief Financial Officer | Grant(A) | 11K | — | $0 |
| Feb 17, 2026 | Izenstark Gregory A. | Chief Financial Officer | Option exercise(M) | 16K | — | — |
| Feb 17, 2026 | Izenstark Gregory A. | Chief Financial Officer | Option exercise(M) | 16K | — | $0 |
| Feb 17, 2026 | Chilton Kendra | SVP, Chief Accounting Officer | Grant(A) | 3K | — | $0 |
| Feb 17, 2026 | Chilton Kendra | SVP, Chief Accounting Officer | Option exercise(M) | 2K | — | — |
| Feb 17, 2026 | Chilton Kendra | SVP, Chief Accounting Officer | Option exercise(M) | 2K | — | $0 |
| Jan 31, 2026 | Connell James W. Jr. | See Remarks | Disposed to issuer(D) | 18K | — | $0 |
| Jan 31, 2026 | Connell James W. Jr. | See Remarks | Disposed to issuer(D) | 12K | — | $0 |
| Jan 30, 2026 | Connell James W. Jr. | See Remarks | Option exercise(M) | 19K | — | — |
| Jan 30, 2026 | Connell James W. Jr. | See Remarks | Tax withholding(F) | 5K | $27.83 | $147K |
| Jan 30, 2026 | Connell James W. Jr. | See Remarks | Option exercise(M) | 19K | — | $0 |
| Dec 4, 2025 | Brown Christian | Chief Executive Officer, Director | Sell(S) | 7K | $24.51 | $174K |
| Dec 3, 2025 | Brown Christian | Chief Executive Officer, Director | Option exercise(M) | 29K | — | — |
| Dec 3, 2025 | Brown Christian | Chief Executive Officer, Director | Option exercise(M) | 29K | — | $0 |
| Nov 14, 2025 | Icahn Carl C | 10% Owner | Buy(P) | 3.5M | $21.50 | $75.0M |
| Sep 5, 2025 | Southwest Gas Holdings, Inc. | 10% Owner | Sell(S) | 27.4M | $19.60 | $536.3M |
| Aug 11, 2025 | Southwest Gas Holdings, Inc. | 10% Owner | Sell(S) | 18.8M | $19.50 | $367.1M |
| Jul 8, 2025 | Southwest Gas Holdings, Inc. | 10% Owner | Sell(S) | 1.1M | $20.75 | $22.0M |
| Jun 18, 2025 | Southwest Gas Holdings, Inc. | 10% Owner | Sell(S) | 11.2M | $20.75 | $232.7M |
| May 22, 2025 | Southwest Gas Holdings, Inc. | 10% Owner | Sell(S) | 13.2M | $17.50 | $231.1M |
| May 12, 2025 | Connell James W. Jr. | See Remarks | Option exercise(M) | 6K | — | — |
| May 12, 2025 | Connell James W. Jr. | See Remarks | Tax withholding(F) | 2K | $19.53 | $31K |
| May 12, 2025 | Connell James W. Jr. | See Remarks | Option exercise(M) | 6K | — | $0 |
| May 12, 2025 | Chilton Kendra | SVP, Chief Accounting Officer | Tax withholding(F) | 1K | $19.53 | $26K |
| May 12, 2025 | Chilton Kendra | SVP, Chief Accounting Officer | Option exercise(M) | 5K | — | — |
| May 12, 2025 | Chilton Kendra | SVP, Chief Accounting Officer | Option exercise(M) | 5K | — | $0 |
| May 12, 2025 | Izenstark Gregory A. | Chief Financial Officer | Tax withholding(F) | 13K | $19.53 | $255K |
| May 12, 2025 | Izenstark Gregory A. | Chief Financial Officer | Option exercise(M) | 40K | — | — |
| May 12, 2025 | Izenstark Gregory A. | Chief Financial Officer | Option exercise(M) | 40K | — | $0 |
| May 12, 2025 | Wilcock Jason S. | See Remarks | Tax withholding(F) | 9K | $19.53 | $171K |
| May 12, 2025 | Wilcock Jason S. | See Remarks | Option exercise(M) | 30K | — | — |
| May 12, 2025 | Wilcock Jason S. | See Remarks | Option exercise(M) | 30K | — | $0 |
| Apr 30, 2025 | Dill Julie | Director | Option exercise(M) | 7K | — | — |
| Apr 30, 2025 | Dill Julie | Director | Option exercise(M) | 7K | — | $0 |
| Apr 30, 2025 | Evans Andrew W | Director | Option exercise(M) | 7K | — | — |
| Apr 30, 2025 | Evans Andrew W | Director | Option exercise(M) | 7K | — | $0 |
| Apr 30, 2025 | Haller Karen S | Director | Option exercise(M) | 7K | — | — |
| Apr 30, 2025 | Haller Karen S | Director | Option exercise(M) | 7K | — | $0 |
| Apr 30, 2025 | Patton Charles R. | Director | Option exercise(M) | 7K | — | — |
| Apr 30, 2025 | Patton Charles R. | Director | Option exercise(M) | 7K | — | $0 |
| Apr 30, 2025 | Mariucci Anne L | Director | Option exercise(M) | 7K | — | — |
| Apr 30, 2025 | Mariucci Anne L | Director | Option exercise(M) | 7K | — | $0 |
| Apr 30, 2025 | Krummel Christopher A | Director | Option exercise(M) | 7K | — | — |
| Apr 30, 2025 | Krummel Christopher A | Director | Option exercise(M) | 7K | — | $0 |
| Apr 16, 2025 | Haller Karen S | Director | Grant(A) | 7K | — | $0 |
| Apr 16, 2025 | Dill Julie | Director | Grant(A) | 7K | — | $0 |
| Apr 16, 2025 | Evans Andrew W | Director | Grant(A) | 7K | — | $0 |
| Apr 16, 2025 | Krummel Christopher A | Director | Grant(A) | 7K | — | $0 |
| Apr 16, 2025 | Patton Charles R. | Director | Grant(A) | 7K | — | $0 |
| Apr 16, 2025 | Mariucci Anne L | Director | Grant(A) | 7K | — | $0 |
| Mar 28, 2025 | Dill Julie | Director | Buy(P) | 500 | $16.57 | $8K |
| Mar 26, 2025 | Dill Julie | Director | Buy(P) | 500 | $16.63 | $8K |
| Feb 25, 2025 | Wilcock Jason S. | See Remarks | Grant(A) | 20K | — | $0 |
| Feb 25, 2025 | Wilcock Jason S. | See Remarks | Grant(A) | 30K | — | $0 |
| Feb 25, 2025 | Brown Christian | Chief Executive Officer, Director | Grant(A) | 90K | — | $0 |
| Feb 25, 2025 | Brown Christian | Chief Executive Officer, Director | Grant(A) | 60K | — | $0 |
| Feb 25, 2025 | Izenstark Gregory A. | Chief Financial Officer | Grant(A) | 31K | — | $0 |
| Feb 25, 2025 | Izenstark Gregory A. | Chief Financial Officer | Grant(A) | 46K | — | $0 |
| Feb 25, 2025 | Connell James W. Jr. | See Remarks | Grant(A) | 18K | — | $0 |
| Feb 25, 2025 | Connell James W. Jr. | See Remarks | Grant(A) | 12K | — | $0 |
| Feb 25, 2025 | Chilton Kendra | SVP, Chief Accounting Officer | Grant(A) | 4K | — | $0 |
| Feb 25, 2025 | Chilton Kendra | SVP, Chief Accounting Officer | Grant(A) | 6K | — | $0 |
| Feb 17, 2025 | Chilton Kendra | SVP, Chief Accounting Officer | Grant(A) | 7K | — | $0 |
| Dec 3, 2024 | Brown Christian | Chief Executive Officer | Grant(A) | 73K | — | $0 |
| Jul 31, 2024 | Fehrman William | Director | Buy(P) | 20K | $16.50 | $330K |
| Jul 31, 2024 | Fehrman William | Director | Disposed to issuer(D) | 190K | — | $0 |
| Jul 30, 2024 | Connell James W. Jr. | See Remarks | Grant(A) | 19K | — | $0 |
| May 12, 2024 | Wilcock Jason S. | See Remarks | Grant(A) | 30K | — | $0 |
| May 12, 2024 | Izenstark Gregory A. | Chief Financial Officer | Grant(A) | 40K | — | $0 |
| Apr 30, 2024 | Haller Karen S | Director | Grant(A) | 7K | — | $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 → 2026-07-14. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).