Martin Marietta Materials Inc. (MLM)
Martin Marietta Materials Inc. (MLM) Insider Trading
Directors, officers and holders of more than 10% of MLM report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 125 transactions on file: 0 with code P, 0 with code S and 50 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 1, 2026 | Petro Michael J | SVP and CFO | A Award | 9,331 | Not measured | Not measured |
| Aug 31, 2026 | LYONS MARTIN J | Director | A Award | 68 | $518.70 | $35,272 |
| Aug 31, 2026 | WAJSGRAS DAVID C | Director | A Award | 78 | $518.70 | $40,459 |
| Aug 31, 2026 | Pike Thomas | Director | A Award | 66 | $518.70 | $34,234 |
| Aug 21, 2026 | Niemann Philipp | Director | A Award | 337 | Not measured | Not measured |
| Aug 3, 2026 | Petro Michael J | SVP and CFO | F Tax Payment | 368 | $542.27 | $199,555 |
| May 29, 2026 | LYONS MARTIN J | Director | A Award | 61 | $581.64 | $35,480 |
| May 29, 2026 | Pike Thomas | Director | A Award | 59 | $581.64 | $34,317 |
| May 29, 2026 | WAJSGRAS DAVID C | Director | A Award | 69 | $581.64 | $40,133 |
| May 14, 2026 | Mack Mary T | Director | A Award | 313 | Not measured | Not measured |
| May 14, 2026 | Foxx Anthony R | Director | A Award | 313 | Not measured | Not measured |
| May 14, 2026 | SLAGER DONALD W | Director | A Award | 313 | Not measured | Not measured |
| May 14, 2026 | WAJSGRAS DAVID C | Director | A Award | 313 | Not measured | Not measured |
| May 14, 2026 | Ables Dorothy M | Director | A Award | 313 | Not measured | Not measured |
| May 14, 2026 | Pike Thomas | Director | A Award | 313 | Not measured | Not measured |
| May 14, 2026 | PEREZ LAREE E | Director | A Award | 313 | Not measured | Not measured |
| May 14, 2026 | DELLY GAYLA J | Director | A Award | 313 | Not measured | Not measured |
| May 14, 2026 | LYONS MARTIN J | Director | A Award | 313 | Not measured | Not measured |
| May 1, 2026 | Samborski Christopher William | EVP, COO | A Award | 8,101 | Not measured | Not measured |
| Mar 1, 2026 | Petro Michael J | SVP and CFO | A Award | 2,960 | Not measured | Not measured |
| Mar 1, 2026 | Nye C Howard | Chairman, Pres & CEO | A Award | 5,919 | Not measured | Not measured |
| Mar 1, 2026 | McCunniff Donald A. | EVP and CHRO | A Award | 2,960 | Not measured | Not measured |
| Mar 1, 2026 | Schoen George Frederick | EVP, GC and Corp. Secretary | A Award | 23,673 | Not measured | Not measured |
| Feb 27, 2026 | KORALESKI JOHN J | Director | A Award | 69 | $676.57 | $46,683 |
| Feb 27, 2026 | Pike Thomas | Director | A Award | 47 | $676.57 | $31,799 |
| Feb 27, 2026 | WAJSGRAS DAVID C | Director | A Award | 56 | $676.57 | $37,888 |
| Feb 24, 2026 | Nye C Howard | Chairman, Pres & CEO | F Tax Payment | 1,221 | $696.85 | $850,854 |
| Feb 24, 2026 | Cardin Robert J | SVP, Controller & CAO | F Tax Payment | 103 | $696.85 | $71,776 |
| Feb 24, 2026 | Petro Michael J | SVP and CFO | F Tax Payment | 94 | $696.85 | $65,504 |
| Feb 24, 2026 | Flynn Jason Paul | SVP and CIO | F Tax Payment | 30 | $696.85 | $20,906 |
| Feb 23, 2026 | Petro Michael J | SVP and CFO | F Tax Payment | 211 | $683.60 | $144,240 |
| Feb 23, 2026 | McCunniff Donald A. | EVP and CHRO | F Tax Payment | 192 | $683.60 | $131,251 |
| Feb 23, 2026 | Nye C Howard | Chairman, Pres & CEO | F Tax Payment | 1,805 | $683.60 | $1,233,898 |
| Feb 23, 2026 | Flynn Jason Paul | SVP and CIO | F Tax Payment | 177 | $683.60 | $120,997 |
| Feb 23, 2026 | Cardin Robert J | SVP, Controller & CAO | F Tax Payment | 209 | $683.60 | $142,872 |
| Feb 20, 2026 | Flynn Jason Paul | SVP and CIO | A Award | 595 | Not measured | Not measured |
| Feb 20, 2026 | Petro Michael J | SVP and CFO | A Award | 931 | Not measured | Not measured |
| Feb 20, 2026 | Flynn Jason Paul | SVP and CIO | A Award | 592 | $548.75 | $324,860 |
| Feb 20, 2026 | Nye C Howard | Chairman, Pres & CEO | A Award | 2,216 | $548.75 | $1,216,030 |
| Feb 20, 2026 | Nye C Howard | Chairman, Pres & CEO | A Award | 6,405 | Not measured | Not measured |
| Feb 20, 2026 | Cardin Robert J | SVP, Controller & CAO | A Award | 658 | Not measured | Not measured |
| Feb 20, 2026 | McCunniff Donald A. | EVP and CHRO | A Award | 1,277 | Not measured | Not measured |
| Feb 17, 2026 | Cardin Robert J | SVP, Controller & CAO | F Tax Payment | 822 | $666.53 | $547,888 |
| Feb 17, 2026 | Cardin Robert J | SVP, Controller & CAO | A Award | 1,869 | Not measured | Not measured |
| Feb 17, 2026 | Nye C Howard | Chairman, Pres & CEO | A Award | 22,365 | Not measured | Not measured |
| Feb 17, 2026 | Nye C Howard | Chairman, Pres & CEO | F Tax Payment | 9,717 | $666.53 | $6,476,672 |
| Feb 17, 2026 | Petro Michael J | SVP and CFO | A Award | 1,724 | Not measured | Not measured |
| Feb 17, 2026 | Flynn Jason Paul | SVP and CIO | F Tax Payment | 107 | $666.53 | $71,319 |
| Feb 17, 2026 | Flynn Jason Paul | SVP and CIO | A Award | 222 | Not measured | Not measured |
| Feb 17, 2026 | Petro Michael J | SVP and CFO | F Tax Payment | 758 | $666.53 | $505,230 |
The full Form 4 history is on the MLM company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.