MARTIN MARIETTA MATERIALS INC (MLM) Insider Transactions
Over the last 12 months, 18 MARTIN MARIETTA MATERIALS INC (MLM) insiders filed 59 SEC Form 4 transactions — $0 in open-market purchases ( 0 distinct buyers) and $636.6K in open-market sales. 0% of all transactions were executed under a pre-scheduled Rule 10b5-1 trading plan.
- $0Open-market buys (1y)
- $636.6KOpen-market sells (1y)
- 18Distinct insiders
- 59Transactions filed
- 0%Under Rule 10b5-1 plan
- 2026-05-29Latest filing
Recent Form 4 Filings Most recent 50 of 59 (1-year window)
Each row is a single Form 4 filing event for MLM, sourced directly from SEC EDGAR. The Type column classifies the SEC transaction code into Buy / Sell / Grant / Exercise / Other; the 10b5-1 badge marks trades executed under a pre-scheduled SEC Rule 10b5-1 plan.
| Date | Insider | Title | Type | SEC Code | Value | Shares | Price |
|---|---|---|---|---|---|---|---|
| 2026-05-29 | WAJSGRAS DAVID C | — | Grant | A | $40.1K | 69 | $581.64 |
| 2026-05-29 | Pike Thomas | — | Grant | A | $34.3K | 59 | $581.64 |
| 2026-05-29 | LYONS MARTIN J | — | Grant | A | $35.5K | 61 | $581.64 |
| 2026-05-14 | WAJSGRAS DAVID C | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-14 | SLAGER DONALD W | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-14 | Pike Thomas | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-14 | PEREZ LAREE E | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-14 | Mack Mary T | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-14 | LYONS MARTIN J | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-14 | Foxx Anthony R | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-14 | DELLY GAYLA J | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-14 | Ables Dorothy M | — | Grant | A | $0 | 313 | $0.00 |
| 2026-05-01 | Samborski Christopher William | EVP, COO | Grant | A | $0 | 8,101 | $0.00 |
| 2026-03-01 | Schoen George Frederick | EVP, GC and Corp. Secretary | Grant | — | $0 | 23,673 | $0.00 |
| 2026-03-01 | Petro Michael J | SVP and CFO | Grant | — | $0 | 2,960 | $0.00 |
| 2026-03-01 | Nye C Howard | Chairman, Pres & CEO | Grant | — | $0 | 5,919 | $0.00 |
| 2026-03-01 | McCunniff Donald A. | EVP and CHRO | Grant | — | $0 | 2,960 | $0.00 |
| 2026-02-27 | WAJSGRAS DAVID C | — | Grant | — | $37.9K | 56 | $676.57 |
| 2026-02-27 | Pike Thomas | — | Grant | — | $31.8K | 47 | $676.57 |
| 2026-02-27 | KORALESKI JOHN J | — | Grant | — | $46.7K | 69 | $676.57 |
| 2026-02-24 | Petro Michael J | SVP and CFO | Grant | — | $65.5K | 94 | $696.85 |
| 2026-02-24 | Nye C Howard | Chairman, Pres & CEO | Grant | — | $850.9K | 1,221 | $696.85 |
| 2026-02-24 | Flynn Jason Paul | SVP and CIO | Grant | — | $20.9K | 30 | $696.85 |
| 2026-02-24 | Cardin Robert J | SVP, Controller & CAO | Grant | — | $71.8K | 103 | $696.85 |
| 2026-02-23 | Petro Michael J | SVP and CFO | Grant | — | $144.2K | 211 | $683.60 |
| 2026-02-23 | Nye C Howard | Chairman, Pres & CEO | Grant | — | $1.2M | 1,805 | $683.60 |
| 2026-02-23 | McCunniff Donald A. | EVP and CHRO | Grant | — | $131.3K | 192 | $683.60 |
| 2026-02-23 | Flynn Jason Paul | SVP and CIO | Grant | — | $121.0K | 177 | $683.60 |
| 2026-02-23 | Cardin Robert J | SVP, Controller & CAO | Grant | — | $142.9K | 209 | $683.60 |
| 2026-02-20 | Petro Michael J | SVP and CFO | Grant | — | $0 | 931 | $0.00 |
| 2026-02-20 | Nye C Howard | Chairman, Pres & CEO | Grant | — | $1.2M | 2,216 | $548.75 |
| 2026-02-20 | Nye C Howard | Chairman, Pres & CEO | Grant | — | $0 | 6,405 | $0.00 |
| 2026-02-20 | McCunniff Donald A. | EVP and CHRO | Grant | — | $0 | 1,277 | $0.00 |
| 2026-02-20 | Flynn Jason Paul | SVP and CIO | Grant | — | $324.9K | 592 | $548.75 |
| 2026-02-20 | Flynn Jason Paul | SVP and CIO | Grant | — | $0 | 595 | $0.00 |
| 2026-02-20 | Cardin Robert J | SVP, Controller & CAO | Grant | — | $0 | 658 | $0.00 |
| 2026-02-17 | Petro Michael J | SVP and CFO | Grant | — | $0 | 1,724 | $0.00 |
| 2026-02-17 | Petro Michael J | SVP and CFO | Grant | — | $505.2K | 758 | $666.53 |
| 2026-02-17 | Flynn Jason Paul | SVP and CIO | Grant | — | $0 | 222 | $0.00 |
| 2026-02-17 | Flynn Jason Paul | SVP and CIO | Grant | — | $71.3K | 107 | $666.53 |
| 2026-02-17 | Nye C Howard | Chairman, Pres & CEO | Grant | — | $0 | 22,365 | $0.00 |
| 2026-02-17 | Nye C Howard | Chairman, Pres & CEO | Grant | — | $6.5M | 9,717 | $666.53 |
| 2026-02-17 | Cardin Robert J | SVP, Controller & CAO | Grant | — | $0 | 1,869 | $0.00 |
| 2026-02-17 | Cardin Robert J | SVP, Controller & CAO | Grant | — | $547.9K | 822 | $666.53 |
| 2025-12-16 | Nye C Howard | Chairman, Pres & CEO | Grant | — | $187.6K | 298 | $629.49 |
| 2025-12-16 | McCunniff Donald A. | EVP and CHRO | Grant | — | $31.5K | 50 | $629.49 |
| 2025-12-16 | Cardin Robert J | SVP, Controller & CAO | Grant | — | $20.1K | 32 | $629.49 |
| 2025-12-16 | BAR ROSELYN R | Executive Vice President | Grant | — | $41.5K | 66 | $629.49 |
| 2025-12-02 | BAR ROSELYN R | Executive Vice President | Grant | — | $0 | 488 | $0.00 |
| 2025-12-01 | Flynn Jason Paul | SVP and CIO | Grant | — | $75.7K | 123 | $615.25 |
Showing the most recent 50 of 59 transactions. For the full 1-year history with sorting, filtering, and cross-ticker industry context, open the full insider transactions drilldown.
Methodology & FAQ
How We Track MLM Insider Transactions
Form 4 disclosures are sourced directly from SEC EDGAR and re-ingested on every pipeline cycle. A complete description of transaction-code handling, the open-market vs grant distinction, and the Rule 10b5-1 plan-reference heuristic is documented in the Methodology.
What is an SEC Form 4 filing for MARTIN MARIETTA MATERIALS INC?
Form 4 is a transaction-level disclosure that corporate insiders — officers, directors, and beneficial owners of more than 10% of a registered class of equity securities — must file with the SEC within two business days of any change in their beneficial ownership of MARTIN MARIETTA MATERIALS INC (MLM) shares.
What is a Rule 10b5-1 trading plan?
Rule 10b5-1 is an SEC rule that lets insiders schedule trades in advance under a written plan, providing an affirmative defense against insider-trading allegations as long as the plan was adopted in good faith and not while in possession of material non-public information. Form 4 rows marked "10b5-1" on this page indicate the underlying trade was executed under such a plan; rows without the badge are discretionary or did not reference a plan in the Form 4 footnotes.
How is "insider buying" different from a stock grant or option exercise?
An insider buy (SEC transaction code P) is an open-market purchase of MARTIN MARIETTA MATERIALS INC (MLM) stock executed at the prevailing market price using the insider's personal capital. Stock grants (code A) and option exercises (code M) are compensation events, not directional trades; they are tracked separately and excluded from the "conviction" signal because they are not discretionary purchases.
How recent is the data?
Form 4 transactions are typically reported within two business days of execution. Pactolio re-ingests the EDGAR feed on a nightly cycle and reflects new filings on the next ingest run, typically within 24 hours of EDGAR acceptance. The table on this page covers the most recent 1-year window.