William M. Lambert is Director at MSA Safety Inc (MSA). They have made 38 open-market trades across 2 companies since 2006, most recently 2026-09-14.
CIK 0001187330
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
2 open-market purchases totalling $2.2M since 2008, against 36 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MSA | SELL | 2022-08-09 | 2022-08-11 | $126.73 | $16.4M | -3.1% | -5.0% | +3.0% |
| KMT | BUY | 2022-05-04 | 2022-05-05 | $26.23 | $1.9M | +1.4% | +5.5% | -1.8% |
| MSA | SELL | 2021-11-19 | 2021-11-23 | $155.68 | $18.3M | -6.2% | -4.5% | -10.4% |
| MSA | SELL | 2021-09-16 | 2021-09-16 | $153.67 | $3.1M | -4.0% | -0.5% | -5.3% |
| MSA | SELL | 2020-12-07 | 2020-12-09 | $151.46 | $11.6M | -0.7% | +4.2% | +8.7% |
| MSA | SELL | 2020-08-10 | 2020-08-11 | $124.03 | $13.4M | -1.7% | -3.0% | +10.6% |
| MSA | SELL | 2020-03-20 | 2020-03-23 | $109.00 | $818K | +5.1% | +8.9% | +21.4% |
| MSA | SELL | 2020-03-04 | 2020-03-05 | $129.68 | $12.0M | -8.5% | -21.3% | -3.1% |
| MSA | SELL | 2019-10-30 | 2019-10-31 | $120.38 | $12.6M | +3.1% | +1.7% | +14.1% |
| MSA | SELL | 2019-03-13 | 2019-03-14 | $103.55 | $4.5M | +0.2% | +5.3% | +1.2% |
| MSA | SELL | 2018-11-28 | 2018-12-03 | $105.97 | $2.1M | -8.2% | -13.0% | -5.9% |
| MSA | SELL | 2018-11-26 | 2018-11-28 | $106.49 | $2.1M | -7.6% | -14.0% | -3.4% |
| MSA | SELL | 2018-06-19 | 2018-06-20 | $94.86 | $2.6M | +0.4% | +3.5% | +10.1% |
| MSA | SELL | 2018-06-15 | 2018-06-19 | $94.92 | $17.9M | +0.8% | +4.5% | +11.4% |
| MSA | SELL | 2017-11-27 | 2017-11-28 | $80.31 | $3.8M | -3.3% | -5.8% | +1.6% |
| MSA | SELL | 2017-11-22 | 2017-11-24 | $80.00 | $1.4M | +2.6% | -1.6% | +3.4% |
| MSA | SELL | 2017-11-20 | 2017-11-21 | $79.87 | $3.5M | +3.1% | -0.4% | -5.0% |
| MSA | SELL | 2017-11-16 | 2017-11-17 | $79.51 | $2.5M | +8.2% | +1.5% | -2.2% |
| MSA | SELL | 2017-11-03 | 2017-11-07 | $79.51 | $1.1M | +1.2% | +4.8% | -3.1% |
| MSA | SELL | 2017-05-05 | 2017-05-09 | $79.08 | $4.3M | +0.0% | +7.3% | -6.4% |
| MSA | SELL | 2017-05-04 | 2017-05-08 | $79.00 | $314K | -0.9% | +4.7% | -7.5% |
| MSA | SELL | 2017-05-03 | 2017-05-04 | $78.51 | $612K | -0.3% | +3.6% | -1.1% |
| MSA | SELL | 2017-05-02 | 2017-05-04 | $78.90 | $3.1M | -0.3% | +3.6% | -1.1% |
| MSA | SELL | 2017-05-02 | 2017-05-04 | $78.84 | $7.2M | -0.3% | +3.6% | -1.1% |
| MSA | SELL | 2017-04-28 | 2017-05-02 | $79.31 | $1.4M | -0.9% | +5.9% | +1.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.