Martin Marietta Materials Inc (MLM) insider trading
Every open-market stock purchase and sale by Martin Marietta Materials Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Materials.
Insider activity at a glance
- No open-market insider trades in the last 12 months.
- Last insider buy: Michael J Petro (VP), $250K, 20 months ago.
- Congress: April McClain Delaney sold $250K to $500K, 8 weeks ago.
Last 12 months: insiders bought $0 (0 buys) and sold $0 (0 sales). Last close $509.02 on Oct 21, 2026.
Recent MLM insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Sep 1, 2026 | Michael J Petro (CFO) | Bought (not open market) | — |
| Aug 31, 2026 | David C Wajsgras (Director) | Bought (not open market) | $40.5K |
| Aug 31, 2026 | Martin J Lyons (Director) | Bought (not open market) | $35.3K |
| Aug 31, 2026 | Thomas Pike (Director) | Bought (not open market) | $34.2K |
| Aug 25, 2026 | April McClain Delaney (Representative) | Sold | $250K–500K |
| Aug 21, 2026 | Philipp Niemann (Director) | Bought (not open market) | — |
| Aug 19, 2026 | April McClain Delaney (Representative) | Bought | $1K–15K |
| Aug 3, 2026 | Michael J Petro (CFO) | Sold (not open market) | $200K |
| Jul 24, 2026 | April McClain Delaney (Representative) | Bought | $15K–50K |
| Jul 20, 2026 | April McClain Delaney (Representative) | Bought | $1K–15K |
| Jul 17, 2026 | April McClain Delaney (Representative) | Bought | $1K–15K |
| May 29, 2026 | David C Wajsgras (Director) | Bought (not open market) | $40.1K |
| May 29, 2026 | Martin J Lyons (Director) | Bought (not open market) | $35.5K |
| May 29, 2026 | Thomas Pike (Director) | Bought (not open market) | $34.3K |
| May 28, 2026 | April McClain Delaney (Representative) | Bought | $1K–15K |
| May 14, 2026 | Thomas Pike (Director) | Bought (not open market) | — |
| May 14, 2026 | Dorothy M Ables (Director) | Bought (not open market) | — |
| May 14, 2026 | Donald W Slager (Director) | Bought (not open market) | — |
| May 14, 2026 | Anthony R Foxx (Director) | Bought (not open market) | — |
| May 14, 2026 | Laree E Perez (Director) | Bought (not open market) | — |
| May 14, 2026 | David C Wajsgras (Director) | Bought (not open market) | — |
| May 14, 2026 | Mary T Mack (Director) | Bought (not open market) | — |
| May 14, 2026 | Gayla J Delly (Director) | Bought (not open market) | — |
| May 14, 2026 | Martin J Lyons (Director) | Bought (not open market) | — |
| May 1, 2026 | Christopher William Samborski (COO) | Bought (not open market) | — |
Who's trading MLM
- Michael J Petro, VP: other filings, last Sep 1, 2026
- Martin J Lyons, Director: other filings, last Aug 31, 2026
- David C Wajsgras, Director: other filings, last Aug 31, 2026
- Thomas Pike, Director: other filings, last Aug 31, 2026
- April McClain Delaney, Representative: bought $63K (7 buys), sold $250K (1 sale), last Aug 25, 2026
- Philipp Niemann, Director: other filings, last Aug 21, 2026
- Dorothy M Ables, Director: other filings, last May 14, 2026
- Gayla J Delly, Director: other filings, last May 14, 2026
- Anthony R Foxx, Director: other filings, last May 14, 2026
- Mary T Mack, Director: other filings, last May 14, 2026
- Laree E Perez, Director: other filings, last May 14, 2026
- Donald W Slager, Director: other filings, last May 14, 2026
- Christopher William Samborski, COO: other filings, last May 1, 2026
- Josh Gottheimer, Representative: sold $15K (1 sale), last Apr 9, 2026
- Donald A. McCunniff, VP: other filings, last Mar 1, 2026
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