Martin Marietta Materials (MLM) — insider trading
Materials · NYSE
Martin Marietta Materials (MLM) has 19 reported SEC Form 4 insider transactions in our data (latest 2026-09-01).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-01 | Petro Michael J | Officer (SVP and CFO) | Grant / award / vesting | 9,331 | — | $0 | Form 4 |
| 2026-08-31 | LYONS MARTIN J | Director | Grant / award / vesting | 68 | $518.70 | $35.3K | Form 4 |
| 2026-08-31 | Pike Thomas | Director | Grant / award / vesting | 66 | $518.70 | $34.2K | Form 4 |
| 2026-08-31 | WAJSGRAS DAVID C | Director | Grant / award / vesting | 78 | $518.70 | $40.5K | Form 4 |
| 2026-08-21 | Niemann Philipp | Director | Grant / award / vesting | 337 | — | $0 | Form 4 |
| 2026-08-03 | Petro Michael J | Officer (SVP and CFO) | Shares withheld for taxes / exercise cost | 368 | $542.27 | $199.6K | Form 4 |
| 2026-05-29 | LYONS MARTIN J | Director | Grant / award / vesting | 61 | $581.64 | $35.5K | Form 4 |
| 2026-05-29 | Pike Thomas | Director | Grant / award / vesting | 59 | $581.64 | $34.3K | Form 4 |
| 2026-05-29 | WAJSGRAS DAVID C | Director | Grant / award / vesting | 69 | $581.64 | $40.1K | Form 4 |
| 2026-05-14 | Ables Dorothy M | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-14 | DELLY GAYLA J | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-14 | Foxx Anthony R | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-14 | LYONS MARTIN J | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-14 | Mack Mary T | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-14 | PEREZ LAREE E | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-14 | Pike Thomas | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-14 | SLAGER DONALD W | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-14 | WAJSGRAS DAVID C | Director | Grant / award / vesting | 313 | — | $0 | Form 4 |
| 2026-05-01 | Samborski Christopher William | Officer (EVP, COO) | Grant / award / vesting | 8,101 | — | $0 | Form 4 |
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Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: Martin Marietta Materials (MLM).
Last updated 2026-09-01 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.