Mack Mary T (CIK 1689162) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-18). Recent activity: Buy MLM (313 shares), Buy MLM (308 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-18 | MARTIN MARIETTA MATERIALS INC (MLM) | Director | Buy | 313 | $0 |
| 2025-05-16 | MARTIN MARIETTA MATERIALS INC (MLM) | Director | Buy | 308 | $170,281 |
Source: SEC Form 4 filings · as of 2026-05-18