🕵️ Martin Marietta Materials Inc ($MLM)
SEC insider & ownership activity, last 12 months · CIK 916076 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. No red-flag 8-Ks in the window.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| KALK EN Dolomiet Maatschappij SA | 15.4% | 13D | Aug 21, 2026 | filing ↗ | |
| Financiere de Gestions Internationales SCA | 15.4% | 13D | Aug 21, 2026 | filing ↗ | |
| Gpi Sa | 15.4% | 13D | Aug 21, 2026 | filing ↗ | |
| Lna Holding Srl | 15.4% | 13D | Aug 21, 2026 | filing ↗ | |
| Vanguard Capital Management | 7.5% | 13G | Apr 30, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.2% | 13G | Apr 29, 2026 | filing ↗ | |
| State Street Corporation | 5.2% | 13G | Aug 7, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material agreement (1.01) | Sep 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 15, 2026 | filing ↗ |
| Material agreement (1.01) | Aug 21, 2026 | filing ↗ |
| Acquisition or disposition (2.01) | Aug 21, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Aug 21, 2026 | filing ↗ |
| Officer/director changes (5.02) | Aug 21, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 21, 2026 | filing ↗ |
| Material agreement (1.01) | Aug 18, 2026 | filing ↗ |
| Agreement terminated (1.02) | Aug 18, 2026 | filing ↗ |
| New financial obligation (2.03) | Aug 18, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 18, 2026 | filing ↗ |
| Material agreement (1.01) | Aug 14, 2026 | filing ↗ |
| New financial obligation (2.03) | Aug 14, 2026 | filing ↗ |
| Other events (8.01) | Aug 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 14, 2026 | filing ↗ |
| Material agreement (1.01) | Aug 11, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 11, 2026 | filing ↗ |
| Other events (8.01) | Aug 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 10, 2026 | filing ↗ |
| Other events (8.01) | Aug 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Aug 4, 2026 | filing ↗ |
| Earnings (2.02) | Jul 30, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 30, 2026 | filing ↗ |
| Material agreement (1.01) | Jul 10, 2026 | filing ↗ |
| New financial obligation (2.03) | Jul 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 10, 2026 | filing ↗ |