Martin Marietta Materials (NYSE: MLM) insider transactions
In the twelve months to 10 November 2026, executives and directors of Martin Marietta Materials reported no open-market sales and no open-market purchases, according to the Form 4 filings they submitted to the SEC.
Latest transactions
| Date | Insider | Role | Transaction | Shares | Price | Held after | Filing |
|---|---|---|---|---|---|---|---|
| 1 September 2026 | Petro Michael J | SVP and CFO | Grant or award | +9,331 | — | 24,322 | Form 4 |
| 31 August 2026 | Lyons Martin J | Director | Grant or award | +68 | $518.70 | 442 | Form 4 |
| 31 August 2026 | Pike Thomas | Director | Grant or award | +66 | $518.70 | 5,029 | Form 4 |
| 31 August 2026 | Wajsgras David C | Director | Grant or award | +78 | $518.70 | 5,106 | Form 4 |
| 21 August 2026 | Niemann Philipp | Director | Grant or award | +337 | — | 337 | Form 4 |
| 3 August 2026 | Petro Michael J | SVP and CFO | Shares withheld for tax | −368 | $542.27 | 14,991 | Form 4 |
| 29 May 2026 | Lyons Martin J | Director | Grant or award | +61 | $581.64 | 374 | Form 4 |
| 29 May 2026 | Pike Thomas | Director | Grant or award | +59 | $581.64 | 4,963 | Form 4 |
| 29 May 2026 | Wajsgras David C | Director | Grant or award | +69 | $581.64 | 5,028 | Form 4 |
| 14 May 2026 | Ables Dorothy M | Director | Grant or award | +313 | — | 4,221 | Form 4 |
| 14 May 2026 | Delly Gayla J | Director | Grant or award | +313 | — | 313 | Form 4 |
| 14 May 2026 | Foxx Anthony R | Director | Grant or award | +313 | — | 2,615 | Form 4 |
| 14 May 2026 | Lyons Martin J | Director | Grant or award | +313 | — | 313 | Form 4 |
| 14 May 2026 | Mack Mary T | Director | Grant or award | +313 | — | 914 | Form 4 |
| 14 May 2026 | Perez Laree E | Director | Grant or award | +313 | — | 15,730 | Form 4 |
| 14 May 2026 | Pike Thomas | Director | Grant or award | +313 | — | 4,904 | Form 4 |
| 14 May 2026 | Slager Donald W | Director | Grant or award | +313 | — | 5,064 | Form 4 |
| 14 May 2026 | Wajsgras David C | Director | Grant or award | +313 | — | 4,959 | Form 4 |
| 1 May 2026 | Samborski Christopher William | EVP, COO | Grant or award | +8,101 | — | 21,762 | Form 4 |
| 1 March 2026 | McCunniff Donald A. | EVP and CHRO | Grant or award | +2,960 | — | 7,518 | Form 4 |
Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.
How to read the table
Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.
Where each row comes from
From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Martin Marietta Materials page; the method, in data sources.
Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.