Skip to contentLAMBERT WILLIAM M — MINE SAFETY APPLIANCES CO insider: 378 transactions · InsiderLensInsider trading activity of LAMBERT WILLIAM M
- Transactions on record
- 378
- since Mar 11, 2004
- Open-market buys
- 2
- $1.2M
- Open-market sells
- 74
- $85.6M
- Companies traded
- 3
- last filing May 14, 2026
Figures computed from official regulatory filings — methodology.
Companies where LAMBERT WILLIAM M has traded
Track record of LAMBERT WILLIAM M
Insufficient history for a statistical track record (fewer than 5 open-market buys).
Transaction history of LAMBERT WILLIAM M
Co-insiders of LAMBERT WILLIAM M
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BAILEY MARTHA AKENNAMETAL INC
| Company | Filed | Type | Qty | Price | Value · USD | Src |
|---|
| May 14, 2026 | Award | 899 | 0.00 USD | $0 | SEC |
| Feb 19, 2026 | Other | -7,485 | 39.04 USD | $292.2K | SEC |
| Feb 19, 2026 | ExerciseD | -14,000 | 0.00 USD | $0 | SEC |
| Feb 19, 2026 | Exercise | 14,000 | 20.87 USD | $292.2K | SEC |
| Dec 16, 2025 | Gift | -9,634 | 0.00 USD | $0 | SEC |
| Aug 19, 2025 | Other | -170 | 21.02 USD | $3.6K | SEC |
| Aug 19, 2025 | Exercise | 5,566 | 21.02 USD | $117K | SEC |
| Aug 19, 2025 | ExerciseD | -1,773 | 0.00 USD | $0 | SEC |
| Aug 19, 2025 | ExerciseD | -1,860 | 0.00 USD | $0 | SEC |
| Aug 19, 2025 | AwardD | 6,898 | 0.00 USD | $0 | SEC |
| Aug 19, 2025 | ExerciseD | -1,933 | 0.00 USD | $0 | SEC |
| May 19, 2025 | Award | 909 | 0.00 USD | $0 | SEC |
| Nov 19, 2024 | Gift | -2,200 | 0.00 USD | $0 | SEC |
| Aug 19, 2024 | AwardD | 5,800 | 25.00 USD | $145K | SEC |
| Aug 19, 2024 | ExerciseD | -1,772 | 0.00 USD | $0 | SEC |
| Aug 19, 2024 | Exercise | 4,766 | 25.00 USD | $119.2K | SEC |
| Aug 19, 2024 | ExerciseD | -1,859 | 0.00 USD | $0 | SEC |
| Aug 19, 2024 | Other | -145 | 25.00 USD | $3.6K | SEC |
| Aug 19, 2024 | ExerciseD | -1,135 | 0.00 USD | $0 | SEC |
| May 16, 2024 | Award | 755 | 0.00 USD | $0 | SEC |
| Nov 29, 2023 | Gift | -3,000 | 0.00 USD | $0 | SEC |
| Aug 17, 2023 | Exercise | 4,252 | 25.99 USD | $110.5K | SEC |
| Aug 17, 2023 | ExerciseD | -1,135 | 0.00 USD | $0 | SEC |
| Aug 17, 2023 | Other | -129 | 25.99 USD | $3.4K | SEC |
| Aug 17, 2023 | ExerciseD | -1,345 | 0.00 USD | $0 | SEC |