MLM
Martin Marietta Materials Inc
NYSE: MLM · BASIC MATERIALS · BUILDING MATERIALS
$510.00
+1.25% today
Updated 2026-10-28
Market cap
$36.22B
P/E ratio
33.16
P/S ratio
5.42x
EPS (TTM)
$15.38
Dividend yield
0.66%
52W range
$465 – $708
Volume
0.8M
Martin Marietta Materials Inc (MLM) Insider transactions
Net insider activity
Net buying (100,912 shares)
Buy transactions
71
Sell transactions
29
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-01 | PETRO, MICHAEL J | SVP and CFO | Buy | 9,331 | — | — |
| 2026-08-31 | WAJSGRAS, DAVID C | Director | Buy | 78 | $518.70 | $40458.60 |
| 2026-08-31 | PIKE, THOMAS | Director | Buy | 66 | $518.70 | $34234.20 |
| 2026-08-31 | LYONS, MARTIN J | Director | Buy | 68 | $518.70 | $35271.60 |
| 2026-08-21 | NIEMANN, PHILIPP | Director | Buy | 337 | — | — |
| 2026-08-03 | PETRO, MICHAEL J | SVP and CFO | Sale | 368 | $542.27 | $199555.36 |
| 2026-05-29 | WAJSGRAS, DAVID C | Director | Buy | 69 | $581.64 | $40133.16 |
| 2026-05-29 | PIKE, THOMAS | Director | Buy | 59 | $581.64 | $34316.76 |
| 2026-05-29 | LYONS, MARTIN J | Director | Buy | 61 | $581.64 | $35480.04 |
| 2026-05-14 | WAJSGRAS, DAVID C | Director | Buy | 313 | — | — |
| 2026-05-14 | SLAGER, DONALD W | Director | Buy | 313 | — | — |
| 2026-05-14 | PIKE, THOMAS | Director | Buy | 313 | — | — |
| 2026-05-14 | PEREZ, LAREE E | Director | Buy | 313 | — | — |
| 2026-05-14 | MACK, MARY T | Director | Buy | 313 | — | — |
| 2026-05-14 | LYONS, MARTIN J | Director | Buy | 313 | — | — |
| 2026-05-14 | FOXX, ANTHONY R | Director | Buy | 313 | — | — |
| 2026-05-14 | DELLY, GAYLA J | Director | Buy | 313 | — | — |
| 2026-05-14 | ABLES, DOROTHY M | Director | Buy | 313 | — | — |
| 2026-05-01 | SAMBORSKI, CHRISTOPHER WILLIAM | EVP, COO | Buy | 8,101 | — | — |
| 2026-03-01 | SCHOEN, GEORGE FREDERICK | EVP, GC and Corp. Secretary | Buy | 23,673 | — | — |
| 2026-03-01 | PETRO, MICHAEL J | SVP and CFO | Buy | 2,960 | — | — |
| 2026-03-01 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Buy | 5,919 | — | — |
| 2026-03-01 | MCCUNNIFF, DONALD A. | EVP and CHRO | Buy | 2,960 | — | — |
| 2026-02-27 | WAJSGRAS, DAVID C | Director | Buy | 56 | $676.57 | $37887.92 |
| 2026-02-27 | PIKE, THOMAS | Director | Buy | 47 | $676.57 | $31798.79 |
| 2026-02-27 | KORALESKI, JOHN J | Director | Buy | 69 | $676.57 | $46683.33 |
| 2026-02-24 | PETRO, MICHAEL J | SVP and CFO | Sale | 94 | $696.85 | $65503.90 |
| 2026-02-24 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Sale | 1,221 | $696.85 | $850853.85 |
| 2026-02-24 | FLYNN, JASON PAUL | SVP and CIO | Sale | 30 | $696.85 | $20905.50 |
| 2026-02-24 | CARDIN, ROBERT J | SVP, Controller & CAO | Sale | 103 | $696.85 | $71775.55 |
| 2026-02-23 | PETRO, MICHAEL J | SVP and CFO | Sale | 211 | $683.60 | $144239.60 |
| 2026-02-23 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Sale | 1,805 | $683.60 | $1.23M |
| 2026-02-23 | MCCUNNIFF, DONALD A. | EVP and CHRO | Sale | 192 | $683.60 | $131251.20 |
| 2026-02-23 | FLYNN, JASON PAUL | SVP and CIO | Sale | 177 | $683.60 | $120997.20 |
| 2026-02-23 | CARDIN, ROBERT J | SVP, Controller & CAO | Sale | 209 | $683.60 | $142872.40 |
| 2026-02-20 | PETRO, MICHAEL J | SVP and CFO | Buy | 931 | — | — |
| 2026-02-20 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Buy | 6,405 | — | — |
| 2026-02-20 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Buy | 2,216 | $548.75 | $1.22M |
| 2026-02-20 | MCCUNNIFF, DONALD A. | EVP and CHRO | Buy | 1,277 | — | — |
| 2026-02-20 | FLYNN, JASON PAUL | SVP and CIO | Buy | 595 | — | — |
| 2026-02-20 | FLYNN, JASON PAUL | SVP and CIO | Buy | 592 | $548.75 | $324860.00 |
| 2026-02-20 | CARDIN, ROBERT J | SVP, Controller & CAO | Buy | 658 | — | — |
| 2026-02-17 | PETRO, MICHAEL J | SVP and CFO | Buy | 1,724 | — | — |
| 2026-02-17 | PETRO, MICHAEL J | SVP and CFO | Sale | 758 | $666.53 | $505229.74 |
| 2026-02-17 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Buy | 22,365 | — | — |
| 2026-02-17 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Sale | 9,717 | $666.53 | $6.48M |
| 2026-02-17 | FLYNN, JASON PAUL | SVP and CIO | Buy | 222 | — | — |
| 2026-02-17 | FLYNN, JASON PAUL | SVP and CIO | Sale | 107 | $666.53 | $71318.71 |
| 2026-02-17 | CARDIN, ROBERT J | SVP, Controller & CAO | Buy | 1,869 | — | — |
| 2026-02-17 | CARDIN, ROBERT J | SVP, Controller & CAO | Sale | 822 | $666.53 | $547887.66 |
| 2025-12-16 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Sale | 298 | $629.49 | $187588.02 |
| 2025-12-16 | MCCUNNIFF, DONALD A. | EVP and CHRO | Sale | 50 | $629.49 | $31474.50 |
| 2025-12-16 | CARDIN, ROBERT J | SVP, Controller & CAO | Sale | 32 | $629.49 | $20143.68 |
| 2025-12-16 | BAR, ROSELYN R | Executive Vice President | Sale | 66 | $629.49 | $41546.34 |
| 2025-12-02 | BAR, ROSELYN R | Executive Vice President | Sale | 488 | — | — |
| 2025-12-01 | FLYNN, JASON PAUL | SVP and CIO | Sale | 123 | $615.25 | $75675.75 |
| 2025-12-01 | BAR, ROSELYN R | Executive Vice President | Sale | 420 | $615.25 | $258405.00 |
| 2025-11-28 | WAJSGRAS, DAVID C | Director | Buy | 61 | $623.24 | $38017.64 |
| 2025-11-28 | PIKE, THOMAS | Director | Buy | 51 | $623.24 | $31785.24 |
| 2025-11-28 | KORALESKI, JOHN J | Director | Buy | 75 | $623.24 | $46743.00 |
| 2025-08-29 | WAJSGRAS, DAVID C | Director | Buy | 61 | $616.40 | $37600.40 |
| 2025-08-29 | PIKE, THOMAS | Director | Buy | 51 | $616.40 | $31436.40 |
| 2025-08-29 | KORALESKI, JOHN J | Director | Buy | 76 | $616.40 | $46846.40 |
| 2025-08-08 | PEREZ, LAREE E | Director | Sale | 1,038 | $613.32 | $636626.16 |
| 2025-07-08 | PETRO, MICHAEL J | SVP and CFO | Buy | 1,822 | — | — |
| 2025-05-30 | WAJSGRAS, DAVID C | Director | Buy | 69 | $547.55 | $37780.95 |
| 2025-05-30 | PIKE, THOMAS | Director | Buy | 58 | $547.55 | $31757.90 |
| 2025-05-30 | KORALESKI, JOHN J | Director | Buy | 85 | $547.55 | $46541.75 |
| 2025-05-15 | WAJSGRAS, DAVID C | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-05-15 | SLAGER, DONALD W | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-05-15 | PIKE, THOMAS | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-05-15 | PEREZ, LAREE E | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-05-15 | MACK, MARY T | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-05-15 | KORALESKI, JOHN J | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-05-15 | FOXX, ANTHONY R | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-05-15 | COLE, SUE W | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-05-15 | CARDIN, ROBERT J | SVP, Interim CFO, Ctrl & CAO | Buy | 2,869 | — | — |
| 2025-05-15 | ABLES, DOROTHY M | Director | Buy | 308 | $552.86 | $170280.88 |
| 2025-03-05 | MCCUNNIFF, DONALD A. | EVP and CHRO | Sale | 1,332 | — | — |
| 2025-03-05 | MCCUNNIFF, DONALD A. | EVP and CHRO | Buy | 1,332 | $154.58 | $205900.56 |
| 2025-03-04 | PETRO, MICHAEL J | SVP - Strategy and Development | Buy | 550 | $454.37 | $249903.50 |
| 2025-02-28 | WAJSGRAS, DAVID C | Director | Buy | 78 | $483.14 | $37684.92 |
| 2025-02-28 | PIKE, THOMAS | Director | Buy | 65 | $483.14 | $31404.10 |
| 2025-02-28 | KORALESKI, JOHN J | Director | Buy | 96 | $483.14 | $46381.44 |
| 2025-02-24 | PETRO, MICHAEL J | SVP - Strategy and Development | Sale | 200 | $490.64 | $98128.00 |
| 2025-02-24 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Sale | 2,032 | $490.64 | $996980.48 |
| 2025-02-24 | NICKOLAS, JAMES AJ | EVP and CFO | Sale | 450 | $490.64 | $220788.00 |
| 2025-02-24 | CARDIN, ROBERT J | Sr. VP, Controller and CAO | Sale | 216 | $490.64 | $105978.24 |
| 2025-02-24 | BROOKS, OLIVER W | SVP - Enterprise Excellence | Sale | 188 | $490.64 | $92240.32 |
| 2025-02-24 | BAR, ROSELYN R | Executive Vice President | Sale | 402 | $490.64 | $197237.28 |
| 2025-02-21 | PETRO, MICHAEL J | SVP - Strategy and Development | Buy | 733 | — | — |
| 2025-02-21 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Buy | 7,432 | — | — |
| 2025-02-21 | NYE, C HOWARD | Director, Chairman, Pres & CEO | Buy | 2,125 | $391.87 | $832723.75 |
| 2025-02-21 | NICKOLAS, JAMES AJ | EVP and CFO | Buy | 1,637 | — | — |
| 2025-02-21 | MCCUNNIFF, DONALD A. | EVP and CHRO | Buy | 1,543 | — | — |
| 2025-02-21 | KOHN, BRADLEY D | SVP, General Counsel and Secy | Buy | 981 | — | — |
| 2025-02-21 | CARDIN, ROBERT J | Sr. VP, Controller and CAO | Buy | 795 | — | — |
| 2025-02-21 | BROOKS, OLIVER W | SVP - Enterprise Excellence | Buy | 744 | — | — |
| 2025-02-21 | BAR, ROSELYN R | Executive Vice President | Buy | 1,637 | — | — |
| 2025-02-21 | BAR, ROSELYN R | Executive Vice President | Buy | 738 | $391.87 | $289200.06 |
Frequently asked questions
Are MLM insiders buying or selling?
Over the transactions on record, MLM insiders have been net buyers, with about $13.55M in stock sold across 29 sales, against 36 open-market purchases.
Does insider selling at MLM mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which MLM insiders are selling the most?
Recent selling is concentrated in a few names. NYE, C HOWARD accounts for the largest share on record, with about $9.75M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.