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 15, 2026 | Prevost Patrick M. | Director | Grant(A) | 81 | $253.27 | $21K |
| Jul 15, 2026 | Shular Craig S | Director | Grant(A) | 96 | $253.27 | $24K |
| Jun 12, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Grant(A) | 11 | — | $0 |
| Jun 12, 2026 | Phillippy Robert J | Director | Grant(A) | 7 | — | $0 |
| Jun 12, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Grant(A) | 2 | — | $0 |
| Jun 12, 2026 | Khilnani Vinod M | Director | Grant(A) | 12 | — | $0 |
| Jun 12, 2026 | Shular Craig S | Director | Grant(A) | 31 | — | $0 |
| Jun 12, 2026 | Fashinpaur Melissa A | Chief Accounting Officer | Grant(A) | 1 | — | $0 |
| Jun 12, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Grant(A) | 8 | — | $0 |
| Jun 12, 2026 | Prevost Patrick M. | Director | Grant(A) | 9 | — | $0 |
| Jun 12, 2026 | Liggett Emily M | Director | Grant(A) | 1 | — | $0 |
| May 29, 2026 | Phillippy Robert J | Director | Sell(S) | 1K | $217.67 | $287K |
| May 29, 2026 | Phillippy Robert J | Director | Sell(S) | 1K | $218.59 | $237K |
| May 29, 2026 | Phillippy Robert J | Director | Sell(S) | 740 | $219.54 | $162K |
| May 29, 2026 | Phillippy Robert J | Director | Sell(S) | 356 | $220.30 | $78K |
| May 13, 2026 | Khilnani Vinod M | Director | Sell(S) | 735 | $205.33 | $151K |
| May 13, 2026 | Khilnani Vinod M | Director | Sell(S) | 752 | $206.68 | $155K |
| May 13, 2026 | Khilnani Vinod M | Director | Sell(S) | 410 | $208.04 | $85K |
| May 13, 2026 | Khilnani Vinod M | Director | Sell(S) | 603 | $208.74 | $126K |
| May 13, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Option exercise(M) | 28K | $50.95 | $1.4M |
| May 13, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Tax withholding(F) | 15K | $209.70 | $3.2M |
| May 13, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Option exercise(M) | 28K | — | $0 |
| May 8, 2026 | Edman Thomas T | Director | Grant(A) | 758 | — | $0 |
| May 8, 2026 | Khilnani Vinod M | Director | Grant(A) | 837 | — | $0 |
| May 8, 2026 | Liggett Emily M | Director | Grant(A) | 758 | — | $0 |
| May 8, 2026 | Shular Craig S | Director | Grant(A) | 758 | — | $0 |
| May 8, 2026 | Phillippy Robert J | Director | Grant(A) | 758 | — | $0 |
| May 8, 2026 | Toth Robert B | Director | Grant(A) | 758 | — | $0 |
| May 8, 2026 | Prevost Patrick M. | Director | Grant(A) | 758 | — | $0 |
| May 8, 2026 | Solomon Darlene J. S. | Director | Grant(A) | 758 | — | $0 |
| May 8, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Option exercise(M) | 5K | $113.28 | $556K |
| May 8, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Tax withholding(F) | 4K | $199.14 | $741K |
| May 8, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Sell(S) | 1K | $198.88 | $237K |
| May 8, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Option exercise(M) | 5K | — | $0 |
| May 7, 2026 | Khilnani Vinod M | Director | Option exercise(M) | 2K | — | — |
| May 7, 2026 | Khilnani Vinod M | Director | Option exercise(M) | 2K | — | $0 |
| May 7, 2026 | Liggett Emily M | Director | Option exercise(M) | 2K | — | — |
| May 7, 2026 | Liggett Emily M | Director | Option exercise(M) | 2K | — | $0 |
| May 7, 2026 | Shular Craig S | Director | Option exercise(M) | 2K | — | — |
| May 7, 2026 | Shular Craig S | Director | Option exercise(M) | 2K | — | $0 |
| May 7, 2026 | Reddy N Mohan | Director | Option exercise(M) | 2K | — | — |
| May 7, 2026 | Reddy N Mohan | Director | Option exercise(M) | 2K | — | $0 |
| May 7, 2026 | Phillippy Robert J | Director | Option exercise(M) | 2K | — | — |
| May 7, 2026 | Phillippy Robert J | Director | Option exercise(M) | 2K | — | $0 |
| May 7, 2026 | Toth Robert B | Director | Option exercise(M) | 2K | — | — |
| May 7, 2026 | Toth Robert B | Director | Option exercise(M) | 2K | — | $0 |
| May 7, 2026 | Prevost Patrick M. | Director | Option exercise(M) | 2K | — | — |
| May 7, 2026 | Prevost Patrick M. | Director | Option exercise(M) | 2K | — | $0 |
| May 7, 2026 | Solomon Darlene J. S. | Director | Option exercise(M) | 2K | — | — |
| May 7, 2026 | Solomon Darlene J. S. | Director | Option exercise(M) | 2K | — | $0 |
| Apr 7, 2026 | Shular Craig S | Director | Grant(A) | 163 | $148.86 | $24K |
| Apr 7, 2026 | Prevost Patrick M. | Director | Grant(A) | 138 | $148.86 | $21K |
| Mar 9, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Tax withholding(F) | 5 | $144.19 | $721 |
| Mar 9, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Tax withholding(F) | 14 | $144.19 | $2K |
| Mar 9, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Tax withholding(F) | 6 | $144.19 | $865 |
| Mar 6, 2026 | Shular Craig S | Director | Grant(A) | 50 | — | $0 |
| Mar 6, 2026 | Shular Craig S | Director | Grant(A) | 2 | — | $0 |
| Mar 6, 2026 | Khilnani Vinod M | Director | Grant(A) | 19 | — | $0 |
| Mar 6, 2026 | Khilnani Vinod M | Director | Grant(A) | 2 | — | $0 |
| Mar 6, 2026 | Reddy N Mohan | Director | Grant(A) | 43 | — | $0 |
| Mar 6, 2026 | Reddy N Mohan | Director | Grant(A) | 2 | — | $0 |
| Mar 6, 2026 | Phillippy Robert J | Director | Grant(A) | 11 | — | $0 |
| Mar 6, 2026 | Phillippy Robert J | Director | Grant(A) | 2 | — | $0 |
| Mar 6, 2026 | Liggett Emily M | Director | Grant(A) | 1 | — | $0 |
| Mar 6, 2026 | Liggett Emily M | Director | Grant(A) | 2 | — | $0 |
| Mar 6, 2026 | Toth Robert B | Director | Grant(A) | 2 | — | $0 |
| Mar 6, 2026 | Prevost Patrick M. | Director | Grant(A) | 15 | — | $0 |
| Mar 6, 2026 | Prevost Patrick M. | Director | Grant(A) | 2 | — | $0 |
| Mar 6, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Grant(A) | 5 | — | $0 |
| Mar 6, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Grant(A) | 4 | — | $0 |
| Mar 6, 2026 | Solomon Darlene J. S. | Director | Grant(A) | 2 | — | $0 |
| Mar 6, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Grant(A) | 25 | — | $0 |
| Mar 6, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Grant(A) | 18 | — | $0 |
| Mar 6, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Grant(A) | 9 | — | $0 |
| Mar 6, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Grant(A) | 14 | — | $0 |
| Mar 6, 2026 | Fashinpaur Melissa A | Chief Accounting Officer | Grant(A) | 2 | — | $0 |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Sell(S) | 1K | $157.52 | $171K |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Option exercise(M) | 1K | $87.36 | $89K |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Sell(S) | 3K | $157.26 | $540K |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Option exercise(M) | 1K | $135.58 | $199K |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Option exercise(M) | 3K | $113.28 | $344K |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Tax withholding(F) | 4K | $157.26 | $699K |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Option exercise(M) | 1K | — | $0 |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Option exercise(M) | 1K | — | $0 |
| Mar 3, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Option exercise(M) | 3K | — | $0 |
| Mar 3, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Sell(S) | 1K | $157.26 | $163K |
| Mar 3, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Sell(S) | 2K | $162.00 | $243K |
| Mar 3, 2026 | Fashinpaur Melissa A | Chief Accounting Officer | Sell(S) | 309 | $160.00 | $49K |
| Mar 2, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Tax withholding(F) | 1K | $166.59 | $202K |
| Mar 2, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Tax withholding(F) | 10K | $166.59 | $1.7M |
| Mar 2, 2026 | Chadwick Shelly Marie | Vice President, Finance & CFO | Tax withholding(F) | 4K | $166.59 | $651K |
| Mar 2, 2026 | Fashinpaur Melissa A | Chief Accounting Officer | Tax withholding(F) | 302 | $166.59 | $50K |
| Mar 1, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Option exercise(M) | 2K | — | $0 |
| Mar 1, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Grant(A) | 2K | — | $0 |
| Mar 1, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Grant(A) | 1K | — | $0 |
| Mar 1, 2026 | Chemnitz Gregory R. | VP General Counsel & Secretary | Option exercise(M) | 2K | — | $0 |
| Mar 1, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Option exercise(M) | 9K | — | $0 |
| Mar 1, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Grant(A) | 29K | — | $0 |
| Mar 1, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Grant(A) | 10K | — | $0 |
| Mar 1, 2026 | Vijayvargiya Jugal K. | President and CEO, Director | Option exercise(M) | 9K | — | $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 2019-12-30 → 2026-08-06. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for MTRN